Merge branch 'dev' of https://bdgit.educoder.net/prhm3ew4x/MI_Note into Git-wql

doc/精读报告/gtask/exception/ActionFailureException.doc

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+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.exception;//小米便签行为异常处理
+
+public class ActionFailureException extends RuntimeException {//从RuntimeException类派生出ActionFailureException类，用来处理行为异常
+    private static final long serialVersionUID = 4425249765923293627L;//定义：serialVersionUID相当于java类的身份证，主要用于版本控制。
+
+    public ActionFailureException() {// 函数：交给父类的构造函数（包括下面的两个构造函数）
+        super();//super是指向父类的一个指针，与其相对的还有this，指向当前类。
+    }
+
+    public ActionFailureException(String paramString) {
+        super(paramString);
+    }
+
+    public ActionFailureException(String paramString, Throwable paramThrowable) {//调用父类具有相同形参paramString和paramThrowable的构造方法
+        super(paramString, paramThrowable);
+    }
+}

doc/精读报告/gtask/exception/NetworkFailureException.doc

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+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.exception;//小米便签网络异常处理包，该源文件里定义的所有类都属于这个包
+
+public class NetworkFailureException extends Exception {//应该是处理网络异常的类，直接继承于Exception
+    private static final long serialVersionUID = 2107610287180234136L;//定义：serialVersionUID相当于java类的身份证，主要用于版本控制。作用：验证版本一致性，如果不一致会导致反序列化的时候版本不一致的异常。
+
+    public NetworkFailureException() {
+        super();
+    }//构造函数（以下三个都是）
+
+    public NetworkFailureException(String paramString) {
+        super(paramString);//调用父类具有相同形参paramString的构造方法，相当于Exception(paramString)
+    }
+
+    public NetworkFailureException(String paramString, Throwable paramThrowable) {
+        super(paramString, paramThrowable);//调用父类具有相同形参paramString和paramThrowable的构造方法
+    }
+}

doc/精读报告/gtask/remote/GTaskASyncTask.doc

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+
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.remote;//实现异步操作避免单个操作耗时过久而堵塞任务的关键路径,从而整体卡顿
+
+import android.app.Notification;//以下几行都是引用基于数据库服务的类
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.content.Context;
+import android.content.Intent;
+import android.os.AsyncTask;
+
+import net.micode.notes.R;
+import net.micode.notes.ui.NotesListActivity;
+import net.micode.notes.ui.NotesPreferenceActivity;
+
+
+public class GTaskASyncTask extends AsyncTask<Void, String, Integer> {//异步任务类：任务同步和取消，显示同步任务的进程、通知和结果
+
+    private static int GTASK_SYNC_NOTIFICATION_ID = 5234235;//定义一个int变量，作用是存储GTASK同步通知ID
+
+    public interface OnCompleteListener {//方法：声明了一个名为OnCompleteListener的接口，其内部的OnComplete方法在GTaskSyncService里面实现，用来初始化异步的功能
+        void onComplete();//初始化
+    }
+
+    private Context mContext;//定义成员：文本内容
+
+    private NotificationManager mNotifiManager;//对象： 通知管理器类的实例化
+
+    private GTaskManager mTaskManager;//实例化任务管理器
+
+    private OnCompleteListener mOnCompleteListener;//实例化是否完成的监听器
+
+    public GTaskASyncTask(Context context, OnCompleteListener listener) {//传入两个变量，构造形成GtaskASyncTask类
+        mContext = context;// 引入两个变量，构造形成GtaskASyncTask类
+        mOnCompleteListener = listener;
+        mNotifiManager = (NotificationManager) mContext//getSystemService是Activity的一个方法，可根据传入的参数获得应服务的对象。这里以Context的NOTIFICATION_SERVICE为对象。
+                .getSystemService(Context.NOTIFICATION_SERVICE);//getSystemService是一种可根据传入的参数获得应服务的对象的端口函数。
+        mTaskManager = GTaskManager.getInstance();//getInstance ()函数用于使用单例模式创建类的实例。
+    }
+
+    public void cancelSync() {//取消同步
+        mTaskManager.cancelSync();//调用类中的同名方法来取消同步
+    }
+
+    public void publishProgess(String message) {//显示消息（string message）
+        publishProgress(new String[] {//String[]创建java数组
+                message
+        });
+    }
+
+    private void showNotification(int tickerId, String content) {//显示通知
+        Notification notification = new Notification(R.drawable.notification, mContext//新建一个通知
+                .getString(tickerId), System.currentTimeMillis());//新建一个通知并显示通知
+        notification.defaults = Notification.DEFAULT_LIGHTS;// 默认调用系统自带灯光
+        notification.flags = Notification.FLAG_AUTO_CANCEL;
+        PendingIntent pendingIntent;//描述了想要启动一个Activity、Broadcast或是Service的意图
+        if (tickerId != R.string.ticker_success) {// 点击清除按钮或点击通知后会自动消失
+            pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext,//若同步不成功，就从系统取得一个来启动NotesPreferenceActivity的对象
+                    NotesPreferenceActivity.class), 0);//获取首选项设置页
+
+        } else {
+            pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext,//若同步成功，就从系统取得一个来启动一个NotesListActivity的对象
+                    NotesListActivity.class), 0);
+        }
+        notification.setLatestEventInfo(mContext, mContext.getString(R.string.app_name), content,
+                pendingIntent);//设置最新事件信息
+        mNotifiManager.notify(GTASK_SYNC_NOTIFICATION_ID, notification);//通过NotificationManager对象的notify（）方法来执行一个notification的消息
+    }
+
+    @Override//这是Java5的元数据，自动加上去的一个标志，目的是告诉你下面这个方法是从父类/接口继承过来的，需要重写一次
+    protected Integer doInBackground(Void... unused) {//执行后台操作
+        publishProgess(mContext.getString(R.string.sync_progress_login, NotesPreferenceActivity//利用getString,将把 字符串内容传进sync_progress_login中
+                .getSyncAccountName(mContext)));
+        return mTaskManager.sync(mContext, this);//在后台进行同步
+    }
+
+    @Override//这是Java5的元数据，自动加上去的一个标志，目的是告诉你下面这个方法是从父类/接口继承过来的，需要重写一次
+    protected void onProgressUpdate(String... progress) {//显示进度的更新
+        showNotification(R.string.ticker_syncing, progress[0]);//显示进度的更新
+        if (mContext instanceof GTaskSyncService) {//判断mContext是否是GTaskSyncService的实例
+            ((GTaskSyncService) mContext).sendBroadcast(progress[0]);// 如果mContext是GTaskSyncService实例化的对象则发送一个广播
+        }
+    }
+
+    @Override//这是Java5的元数据，自动加上去的一个标志，目的是告诉你下面这个方同步失败，取消法是从父类/接口继承过来的，需要重写一次
+    protected void onPostExecute(Integer result) {//设置任务，比如在用户界面显示一个进度条
+        if (result == GTaskManager.STATE_SUCCESS) {//若匹配成功，则显示成功及展示出同步的账户
+            showNotification(R.string.ticker_success, mContext.getString(//若匹配成功，则显示成功及展示出同步的账户
+                    R.string.success_sync_account, mTaskManager.getSyncAccount()));
+            NotesPreferenceActivity.setLastSyncTime(mContext, System.currentTimeMillis());
+        } else if (result == GTaskManager.STATE_NETWORK_ERROR) {
+            showNotification(R.string.ticker_fail, mContext.getString(R.string.error_sync_network));//设置最新同步的时间,防止时间出现更改。
+        } else if (result == GTaskManager.STATE_INTERNAL_ERROR) {
+            showNotification(R.string.ticker_fail, mContext.getString(R.string.error_sync_internal));//网络故障导致同步出错
+        } else if (result == GTaskManager.STATE_SYNC_CANCELLED) {
+            showNotification(R.string.ticker_cancel, mContext//同步失败，取消
+                    .getString(R.string.error_sync_cancelled));
+        }
+        if (mOnCompleteListener != null) {//若监听器为空，则创建新进程
+            new Thread(new Runnable() {
+
+                public void run() {
+                    mOnCompleteListener.onComplete();
+                }//执行完后调用然后返回主线程中
+            }).start();
+        }
+    }
+}

doc/精读报告/gtask/remote/GTaskClient.doc

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+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.remote;//这个函数用于自动登录账号并更新消息，创建或者获取任务列表
+
+import android.accounts.Account;//引入包
+import android.accounts.AccountManager;
+import android.accounts.AccountManagerFuture;
+import android.app.Activity;
+import android.os.Bundle;
+import android.text.TextUtils;
+import android.util.Log;
+
+import net.micode.notes.gtask.data.Node;
+import net.micode.notes.gtask.data.Task;
+import net.micode.notes.gtask.data.TaskList;
+import net.micode.notes.gtask.exception.ActionFailureException;
+import net.micode.notes.gtask.exception.NetworkFailureException;
+import net.micode.notes.tool.GTaskStringUtils;
+import net.micode.notes.ui.NotesPreferenceActivity;
+
+import org.apache.http.HttpEntity;
+import org.apache.http.HttpResponse;
+import org.apache.http.client.ClientProtocolException;
+import org.apache.http.client.entity.UrlEncodedFormEntity;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.client.methods.HttpPost;
+import org.apache.http.cookie.Cookie;
+import org.apache.http.impl.client.BasicCookieStore;
+import org.apache.http.impl.client.DefaultHttpClient;
+import org.apache.http.message.BasicNameValuePair;
+import org.apache.http.params.BasicHttpParams;
+import org.apache.http.params.HttpConnectionParams;
+import org.apache.http.params.HttpParams;
+import org.apache.http.params.HttpProtocolParams;
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.zip.GZIPInputStream;
+import java.util.zip.Inflater;
+import java.util.zip.InflaterInputStream;//引入包
+
+
+public class GTaskClient {//GTaskClient类：实现GTask的登录以及创建GTask任务和任务列表，从网络上获取任务内容
+    private static final String TAG = GTaskClient.class.getSimpleName();//Google邮箱指定URL
+
+    private static final String GTASK_URL = "https://mail.google.com/tasks/";//这个是获得URL
+
+    private static final String GTASK_GET_URL = "https://mail.google.com/tasks/ig";//这个是传递URL
+
+    private static final String GTASK_POST_URL = "https://mail.google.com/tasks/r/ig";//发布的uri
+
+    private static GTaskClient mInstance = null;//后续使用的参数以及变量
+    private DefaultHttpClient mHttpClient;//网络地址客户端
+
+    private String mGetUrl;//构造函数：初始化各属性
+
+    private String mPostUrl;
+
+    private long mClientVersion;
+
+    private boolean mLoggedin;
+
+    private long mLastLoginTime;
+
+    private int mActionId;
+
+    private Account mAccount;
+
+    private JSONArray mUpdateArray;
+
+    private GTaskClient() {//getInstance：获取实例化对象并返回
+        mHttpClient = null;//初始化客户端，使用 getInstance()，返回mInstance这个实例化对象，从而获取实例化对象
+        mGetUrl = GTASK_GET_URL;
+        mPostUrl = GTASK_POST_URL;
+        mClientVersion = -1;
+        mLoggedin = false;
+        mLastLoginTime = 0;
+        mActionId = 1;
+        mAccount = null;
+        mUpdateArray = null;
+    }
+
+    public static synchronized GTaskClient getInstance() {//获取实例，如果当前没有示例，则新建一个登陆的gtask，如果有直接返回
+        if (mInstance == null) {// 若无实例，则新建一个
+            mInstance = new GTaskClient();
+        }
+        return mInstance;
+    }
+
+    public boolean login(Activity activity) {//login：用于实现登录的方法，以activity作为参数
+        // we suppose that the cookie would expire after 5 minutes//设置登录时间一旦超过5分钟即需要重新登录
+        // then we need to re-login//实现登录：使用下面定义的loginGoogleAccount( )方法登录Google账户 ，使用下面定义的loginGtask( )方法登录gtask，登录成功返回true，登录失败返回false
+        final long interval = 1000 * 60 * 5;//interval：时间间隔为1000ns * 60 * 5 = 5min 即间隔5分钟时间
+        if (mLastLoginTime + interval < System.currentTimeMillis()) {//判断距离上次登录的时间间隔，若超过5分钟，则重置登录状态
+            mLoggedin = false;//取消登录
+        }
+
+        // need to re-login after account switch//need to re-login after account switch  重新登录操作
+        if (mLoggedin//需要重新登录
+                && !TextUtils.equals(getSyncAccount().name, NotesPreferenceActivity
+                        .getSyncAccountName(activity))) {
+            mLoggedin = false;//若未超时，不需要再次登录，输出已登录信息
+        }
+
+        if (mLoggedin) {//代码块，如果登录的时候符合上面的要求则让其显示已登录登陆
+            Log.d(TAG, "already logged in");//显示已登录
+            return true;//不需要再次登录
+        }
+
+        mLastLoginTime = System.currentTimeMillis();//更新登录时间为系统当前时间
+        String authToken = loginGoogleAccount(activity, false);//获取登录令牌，判断是否登入google账号
+        if (authToken == null) {//登录失败的情况
+            Log.e(TAG, "login google account failed");//登录失败
+            return false;
+        }
+
+        // login with custom domain if necessary//利用自己的用户域名登陆
+        if (!(mAccount.name.toLowerCase().endsWith("gmail.com") || mAccount.name.toLowerCase()//使用用户域名进行登录
+                .endsWith("googlemail.com"))) {// 判断是不是一个谷歌账户
+            StringBuilder url = new StringBuilder(GTASK_URL).append("a/");//变为小写
+            int index = mAccount.name.indexOf('@') + 1;//语句：返回@第一次出现的位置并把位置+1后记录在index里
+            String suffix = mAccount.name.substring(index);//语句：substring() 方法用于提取字符串中介于两个指定下标之间的字符，此语句中index为start没有设置stop，所以提取了index开始到后面的字符，也就是账户名的后缀，例如qq.com   163.com之类的后缀
+            url.append(suffix + "/");//均为字符串操作来构建url链接
+            mGetUrl = url.toString() + "ig";//设置用户的getUrl
+            mPostUrl = url.toString() + "r/ig";//设置用户postURL
+
+            if (tryToLoginGtask(activity, authToken)) {成功登入
+                mLoggedin = true;//若不能使用用户域名登录，使用google官方url登录
+            }
+        }
+
+        // try to login with google official url//尝试使用谷歌的官方URL登录
+        if (!mLoggedin) {//代码块：  若前面的尝试失败，则尝试使用官方的域名登陆
+            mGetUrl = GTASK_GET_URL;
+            mPostUrl = GTASK_POST_URL;
+            if (!tryToLoginGtask(activity, authToken)) {//第二次登录失败，返回false
+                return false;
+            }
+        }
+
+        mLoggedin = true;//如果没有报错就说明登陆成功
+        return true;
+    }
+
+    private String loginGoogleAccount(Activity activity, boolean invalidateToken) {//登陆Google的主函数，主要用于登陆成功后获取认证令牌
+        String authToken;
+        AccountManager accountManager = AccountManager.get(activity);//在这里，账户管理器帮助我们集中管理注册账号
+        Account[] accounts = accountManager.getAccountsByType("com.google");//获取谷歌账户
+
+        if (accounts.length == 0) {//如果没有这样的账号，输出日志信息“无有效的google账户”
+            Log.e(TAG, "there is no available google account");//显示没有该谷歌账户
+            return null;
+        }
+
+        String accountName = NotesPreferenceActivity.getSyncAccountName(activity);//代码块：匹配活动的账户里是否存在账户，存在的话把这个账户记在mAccount中，没有的话显示不能在设置中获取相同名字的账户
+        Account account = null;//遍历account数组，寻找已登录过的信息
+        for (Account a : accounts) {//找到后，为属性赋值
+            if (a.name.equals(accountName)) {//没找到，输出例外信息
+                account = a;
+                break;
+            }
+        }
+        if (account != null) {//若存在，把这个账户记在mAccount中；否则，显示“不能在设置中获取相同名字的账户”字样，并返回值为null的令牌
+            mAccount = account;//若invalidateToken，则需调用invalidateAuthToken废除这个无效的token
+        } else {
+            Log.e(TAG, "unable to get an account with the same name in the settings");//语句： 若遍历完之后仍没有用户名匹配的账号，则直接返回
+            return null;
+        }
+
+        // get the token now//获取token
+        AccountManagerFuture<Bundle> accountManagerFuture = accountManager.getAuthToken(account,//getAuthToken方法： 获取令牌
+                "goanna_mobile", null, activity, null, null);
+        try {
+            Bundle authTokenBundle = accountManagerFuture.getResult();//语句：bundle是一个key-value对，这里获取目标账户的最终结果集
+            authToken = authTokenBundle.getString(AccountManager.KEY_AUTHTOKEN);//语句：这里获取bundle类的对象的String串并赋值给令牌对象
+            if (invalidateToken) {//如果是非法的令牌，那么废除这个账号，取消登录状态
+                accountManager.invalidateAuthToken("com.google", authToken);//删除存储AccountManager中此账号类型对应的authToken缓存，应用必须调用这个方法将缓存的authToken置为过期，否则getAuthToken获取到的一直是缓存的token
+                loginGoogleAccount(activity, false);
+            }
+        } catch (Exception e) {//捕捉令牌获取失败的异常
+            Log.e(TAG, "get auth token failed");//错误，获取授权标记失败
+            authToken = null;//tryToLoginGtask：尝试登录Gtask方法，这是一个试探方法，作为登录的预判
+        }
+
+        return authToken;//再次验证令牌。令牌可能是过期的，因此我们需要废除过期令牌
+    }
+
+    private boolean tryToLoginGtask(Activity activity, String authToken) {//方法：用于判断令牌对于登陆gtask账号是否有效
+        if (!loginGtask(authToken)) {//代码块： 如果令牌不可用于登陆gtask账号，则需要重新登陆google账号获取令牌
+            // maybe the auth token is out of date, now let's invalidate the//判断令牌对于登陆gtask账号是否有效
+            // token and try again
+            authToken = loginGoogleAccount(activity, true);//删除过一个无效的authToken，申请一个新的后再次尝试登陆
+            if (authToken == null) {//代码块：对再次登陆google账号失败的处理
+                Log.e(TAG, "login google account failed");//错误，登录 google 帐户失败
+                return false;//对再次登陆google账号失败的处理
+            }
+
+            if (!loginGtask(authToken)) {//代码块： 重新获取的令牌再次失效
+                Log.e(TAG, "login gtask failed");//错误，登录 gtask 失败
+                return false;
+            }
+        }
+        return true;
+    }
+
+    private boolean loginGtask(String authToken) {//loginGtask：实现登录Gtask的方法
+        int timeoutConnection = 10000;//连接超时为10000毫秒，即10秒
+        int timeoutSocket = 15000;//socket：android与服务器的通信工具，与http的主要区别是，能够主动推送信息而不需要每次发送请求
+        HttpParams httpParameters = new BasicHttpParams();//申请一个httpParameters参数类的对象
+        HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);//通过该方法设置连接超时的时间
+        HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);//设置端口超时的时间
+        mHttpClient = new DefaultHttpClient(httpParameters);
+        BasicCookieStore localBasicCookieStore = new BasicCookieStore();//为cookie申请存储对象
+        mHttpClient.setCookieStore(localBasicCookieStore);//设置本地cookie
+        HttpProtocolParams.setUseExpectContinue(mHttpClient.getParams(), false);//setUseExpectContinu方法：设置http协议1.1中的一个header属性Expect 100 Continue
+
+        // login gtask//登录的实现
+        try {//登录Gtask
+            String loginUrl = mGetUrl + "?auth=" + authToken;//设置登录的url以及令牌信息
+            HttpGet httpGet = new HttpGet(loginUrl);//通过HttpGet向服务器申请
+            HttpResponse response = null;//通过HttpGet向服务器申请
+            response = mHttpClient.execute(httpGet);//从cookiestore中获取cookie
+
+            // get the cookie now
+            List<Cookie> cookies = mHttpClient.getCookieStore().getCookies();//语句：获取cookie值
+            boolean hasAuthCookie = false;//获取cookie值
+            for (Cookie cookie : cookies) {//功能：遍历cookies集合中的每个Cookie对象，如果有一个Cookie对象的名中含有GTL，hasAuthCookie被赋给True
+                if (cookie.getName().contains("GTL")) {//验证cookie信息，这里通过GTL标志来验证
+                    hasAuthCookie = true;//验证cookie信息
+                }
+            }
+            if (!hasAuthCookie) {//代码块：显示这是没有授权的cookie
+                Log.w(TAG, "it seems that there is no auth cookie");//显示没有授权的cookie
+            }
+
+            // get the client version//获取client的版本号
+            String resString = getResponseContent(response.getEntity());//获取客户端版本
+            String jsBegin = "_setup(";//在取得的内容中，截取从_setup(到)}</script>中间的部分，这是html语言格式，获取的是gtask_url
+            String jsEnd = ")}</script>";
+            int begin = resString.indexOf(jsBegin);//获取jsbegin中begin的序号
+            int end = resString.lastIndexOf(jsEnd);//获取jsend中end的序号
+            String jsString = null;
+            if (begin != -1 && end != -1 && begin < end) {
+                jsString = resString.substring(begin + jsBegin.length(), end);
+            }
+            JSONObject js = new JSONObject(jsString);
+            mClientVersion = js.getLong("v");//语句：设置客户端版本
+        } catch (JSONException e) {//获取异常类型和异常详细消息
+            Log.e(TAG, e.toString());//获取异常类型和异常详细消息
+            e.printStackTrace();
+            return false;
+        } catch (Exception e) {//catch例外，GET失败
+            // simply catch all exceptions
+            Log.e(TAG, "httpget gtask_url failed");//获取异常类型和异常详细消息
+            return false;
+        }
+
+        return true;
+    }
+
+    private int getActionId() {
+        return mActionId++;
+    }//获取动作的id号码
+
+    private HttpPost createHttpPost() {//创建一个用来保存URL的httppost对象
+        HttpPost httpPost = new HttpPost(mPostUrl);//创建一个httppost对象，用来保存URL
+        httpPost.setHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");//创建一个httppost对象保存URL
+        httpPost.setHeader("AT", "1");
+        return httpPost;
+    }
+
+    private String getResponseContent(HttpEntity entity) throws IOException {//getResponseContent：获取服务器响应的数据，主要通过方法getContentEncoding来获取网上资源，返回这些资源
+        String contentEncoding = null;//通过URL得到HttpEntity对象，如果不为空则使用getContent方法创建一个流将数据从网络都过来
+        if (entity.getContentEncoding() != null) {//代码块：如果获取的内容编码不为空，给内容编码赋值，显示encoding：内容编码
+            contentEncoding = entity.getContentEncoding().getValue();
+            Log.d(TAG, "encoding: " + contentEncoding);//gzip是使用deflate进行压缩数据的一个压缩库
+        }
+
+        InputStream input = entity.getContent();
+        if (contentEncoding != null && contentEncoding.equalsIgnoreCase("gzip")) {//deflate是一种压缩算法,是huffman编码的一种加强
+            input = new GZIPInputStream(entity.getContent());
+        } else if (contentEncoding != null && contentEncoding.equalsIgnoreCase("deflate")) {//语句：deflate是一种压缩算法
+            Inflater inflater = new Inflater(true);
+            input = new InflaterInputStream(entity.getContent(), inflater);//InflaterInputStream类：实现了一个流过滤器，用于以“deflate”压缩格式解压缩数据
+        }
+
+        try {//完成将字节流数据内容进行存储的功能
+            InputStreamReader isr = new InputStreamReader(input);//InputStreamReader类：是从字节流到字符流的桥接器，它使用指定的字符集读取字节并将它们解码为字符
+            BufferedReader br = new BufferedReader(isr);//缓存读取类，用于快速的读缓存操作
+            StringBuilder sb = new StringBuilder();
+
+            while (true) {//将BufferedReader类br的内容逐行读取并存储StringBuilder类的sb中。然后返回sb的string格式。
+                String buff = br.readLine();
+                if (buff == null) {
+                    return sb.toString();
+                }
+                sb = sb.append(buff);
+            }
+        } finally {
+            input.close();
+        }
+    }
+
+    private JSONObject postRequest(JSONObject js) throws NetworkFailureException {//postRequest：利用JSON发送请求，返回获取的内容
+        if (!mLoggedin) {//未登录，输出提示信息
+            Log.e(TAG, "please login first");
+            throw new ActionFailureException("not logged in");
+        }
+
+        HttpPost httpPost = createHttpPost();//实例化一个httpPost的对象用来向服务器传输数据，发送在js里请求的内容
+        try {//实例化一个对象，用于与服务器交互和发送请求
+            LinkedList<BasicNameValuePair> list = new LinkedList<BasicNameValuePair>();//LinkedList 类：是一个继承于AbstractSequentialList的双向链表
+            list.add(new BasicNameValuePair("r", js.toString()));
+            UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list, "UTF-8");//形式比较单一，是普通的键值对"UTF-8"
+            httpPost.setEntity(entity);//语句：向httpPost对象中添加参数
+
+            // execute the post//响应请求
+            HttpResponse response = mHttpClient.execute(httpPost);//执行请求
+            String jsString = getResponseContent(response.getEntity());
+            return new JSONObject(jsString);
+
+        } catch (ClientProtocolException e) {//下面是几个异常
+            Log.e(TAG, e.toString());//下面是对四种不同的异常出现时的处理
+            e.printStackTrace();
+            throw new NetworkFailureException("postRequest failed");//post请求失败
+        } catch (IOException e) {//post执行时发生异常
+            Log.e(TAG, e.toString());//post执行时发生异常
+            e.printStackTrace();
+            throw new NetworkFailureException("postRequest failed");//createTask：创建一个任务对象
+        } catch (JSONException e) {//创建任务
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new ActionFailureException("unable to convert response content to jsonobject");
+        } catch (Exception e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new ActionFailureException("error occurs when posting request");
+        }
+    }
+
+    public void createTask(Task task) throws NetworkFailureException {//方法：创建Task,设置好action的链表、client_version、post
+        commitUpdate();//语句：提交更新
+        try {
+            JSONObject jsPost = new JSONObject();//利用JSON获取Task中的内容，并创建相应的jspost
+            JSONArray actionList = new JSONArray();
+
+            // action_list//操作列表
+            actionList.put(task.getCreateAction(getActionId()));
+            jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);//用户版本
+
+            // client_version
+            jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);//client的版本号
+
+            // post//通过postRequest获取任务的返回信息
+            JSONObject jsResponse = postRequest(jsPost);//postRequest方法：获取任务的返回信息
+            JSONObject jsResult = (JSONObject) jsResponse.getJSONArray(
+                    GTaskStringUtils.GTASK_JSON_RESULTS).get(0);
+            task.setGid(jsResult.getString(GTaskStringUtils.GTASK_JSON_NEW_ID));
+
+        } catch (JSONException e) {//代码块：对异常情况的处理
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new ActionFailureException("create task: handing jsonobject failed");
+        }
+    }
+
+    public void createTaskList(TaskList tasklist) throws NetworkFailureException {//createTaskList：创建任务列表，与createTask类似
+        commitUpdate();//提交后更新
+        try {//动作列表
+            JSONObject jsPost = new JSONObject();//操作列表
+            JSONArray actionList = new JSONArray();
+
+            // action_list
+            actionList.put(tasklist.getCreateAction(getActionId()));
+            jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);//客户端版本
+
+            // client version
+            jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
+
+            // post//post操作
+            JSONObject jsResponse = postRequest(jsPost);
+            JSONObject jsResult = (JSONObject) jsResponse.getJSONArray(
+                    GTaskStringUtils.GTASK_JSON_RESULTS).get(0);
+            tasklist.setGid(jsResult.getString(GTaskStringUtils.GTASK_JSON_NEW_ID));
+
+        } catch (JSONException e) {//创建失败
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new ActionFailureException("create tasklist: handing jsonobject failed");
+        }
+    }
+
+    public void commitUpdate() throws NetworkFailureException {//提交更新数据，还是利用JSON
+        if (mUpdateArray != null) {
+            try {//新建JSONObject对象，使用jsPost.put( )添加对应关系，使用postRequest( )方法发送jspost，最后给mUpdateArray赋值NULL，表示现在没有内容要更新
+                JSONObject jsPost = new JSONObject();//更新数据
+
+                // action_list
+                jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, mUpdateArray);
+
+                // client_version
+                jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
+
+                postRequest(jsPost);//post操作
+                mUpdateArray = null;//语句：更新处理完毕，列表置空
+            } catch (JSONException e) {//代码块：对异常的处理
+                Log.e(TAG, e.toString());
+                e.printStackTrace();
+                throw new ActionFailureException("commit update: handing jsonobject failed");
+            }
+        }
+    }
+
+    public void addUpdateNode(Node node) throws NetworkFailureException {//添加更新节点，主要利用commitUpdate
+        if (node != null) {//更新太多内容可能导致出现异常
+            // too many update items may result in an error
+            // set max to 10 items
+            if (mUpdateArray != null && mUpdateArray.length() > 10) {//提交后更新
+                commitUpdate();//更新的阵列为空的话就使用JSONArray
+            }
+
+            if (mUpdateArray == null)
+                mUpdateArray = new JSONArray();
+            mUpdateArray.put(node.getUpdateAction(getActionId()));//语句：将更新节点加入列表
+        }
+    }
+
+    public void moveTask(Task task, TaskList preParent, TaskList curParent)//移动一个任务，通过getGid获取task所属的Id，还是通过JSONObject和postRequest实现
+            throws NetworkFailureException {//把任务移动到指定的列表中
+        commitUpdate();//方法：提交更新数据
+        try {
+            JSONObject jsPost = new JSONObject();
+            JSONArray actionList = new JSONArray();
+            JSONObject action = new JSONObject();
+
+            // action_list
+            action.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
+                    GTaskStringUtils.GTASK_JSON_ACTION_TYPE_MOVE);
+            action.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, getActionId());
+            action.put(GTaskStringUtils.GTASK_JSON_ID, task.getGid());
+            if (preParent == curParent && task.getPriorSibling() != null) {//只有当移动是发生在任务列表中且不是第一个时设置优先级
+                // put prioring_sibing_id only if moving within the tasklist and
+                // it is not the first one
+                action.put(GTaskStringUtils.GTASK_JSON_PRIOR_SIBLING_ID, task.getPriorSibling());
+            }//移动前所属列表
+            action.put(GTaskStringUtils.GTASK_JSON_SOURCE_LIST, preParent.getGid());//设置当前列表
+            action.put(GTaskStringUtils.GTASK_JSON_DEST_PARENT, curParent.getGid());//在不同列表间移动时，放入目标列表中去
+            if (preParent != curParent) {//语句：当移动发生在不同的任务列表之间，设置为dest_list
+                // put the dest_list only if moving between tasklists
+                action.put(GTaskStringUtils.GTASK_JSON_DEST_LIST, curParent.getGid());//将动作列表放入jsPost中
+            }
+            actionList.put(action);
+            jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);//用户版本
+
+            // client_version
+            jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
+
+            postRequest(jsPost);//postRequst()进行更新后的发送
+
+        } catch (JSONException e) {//代码块：异常处理
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new ActionFailureException("move task: handing jsonobject failed");
+        }
+    }
+
+    public void deleteNode(Node node) throws NetworkFailureException {//删除节点，过程类似移动
+        commitUpdate();
+        try {//代码块：新建jsPost，把除了node的其他节点都放入jsPost，并提交
+            JSONObject jsPost = new JSONObject();
+            JSONArray actionList = new JSONArray();
+
+            // action_list
+            node.setDeleted(true);
+            actionList.put(node.getUpdateAction(getActionId()));// 语句：将该节点要更新的操作的id加入操作列表
+            jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
+
+            // client_version
+            jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
+
+            postRequest(jsPost);
+            mUpdateArray = null;
+        } catch (JSONException e) {//代码块：异常处理
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new ActionFailureException("delete node: handing jsonobject failed");
+        }
+    }
+
+    public JSONArray getTaskLists() throws NetworkFailureException {//获取任务列表，首先通过getURI在网上获取数据，在截取所需部分内容返回
+        if (!mLoggedin) {//检查是否在登录状态
+            Log.e(TAG, "please login first");
+            throw new ActionFailureException("not logged in");
+        }
+
+        try {//使用url实例化一个获取对象
+            HttpGet httpGet = new HttpGet(mGetUrl);//通过发送HttpPost请求访问HTTP资源
+            HttpResponse response = null;//语句：初始化Httpresponse （回复）为空
+            response = mHttpClient.execute(httpGet);//语句：使用httpget发送一个请求，返回一个response对象
+
+            // get the task list//代码块：获取任务链表，判断resString的开头结尾格式对不对，正确的话则重建一个字符串赋值给jsString，然后用jsString新建一个JSONObject对象js,并通过js调用一系列方法把任务列表返回
+            String resString = getResponseContent(response.getEntity());//获取任务列表
+            String jsBegin = "_setup(";//截取字符串并放入到jsString里
+            String jsEnd = ")}</script>";
+            int begin = resString.indexOf(jsBegin);
+            int end = resString.lastIndexOf(jsEnd);
+            String jsString = null;
+            if (begin != -1 && end != -1 && begin < end) {
+                jsString = resString.substring(begin + jsBegin.length(), end);
+            }
+            JSONObject js = new JSONObject(jsString);
+            return js.getJSONObject("t").getJSONArray(GTaskStringUtils.GTASK_JSON_LISTS);//获取GTASK_JSON_LISTS
+        } catch (ClientProtocolException e) {//捕捉httpget失败异常
+            Log.e(TAG, e.toString());//处理异常
+            e.printStackTrace();
+            throw new NetworkFailureException("gettasklists: httpget failed");
+        } catch (IOException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new NetworkFailureException("gettasklists: httpget failed");
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new ActionFailureException("get task lists: handing jasonobject failed");
+        }
+    }
+
+    public JSONArray getTaskList(String listGid) throws NetworkFailureException {//方法：对于已经获取的任务列表，可以通过其id来获取到
+        commitUpdate();
+        try {//设置为传入的listGid
+            JSONObject jsPost = new JSONObject();//设置为传入的listGid
+            JSONArray actionList = new JSONArray();
+            JSONObject action = new JSONObject();
+
+            // action_list
+            action.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,//通过action.pu()t对JSONObject对象action添加元素，通过jsPost.put()对jsPost添加相关元素，然后通过postRequest()提交更新后的请求并返回一个JSONObject的对象，最后使用jsResponse.getJSONArray( )获取jsResponse中的JSONArray值并作为函数返回值
+                    GTaskStringUtils.GTASK_JSON_ACTION_TYPE_GETALL);
+            action.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, getActionId());
+            action.put(GTaskStringUtils.GTASK_JSON_LIST_ID, listGid);//这里设置为传入的listGid
+            action.put(GTaskStringUtils.GTASK_JSON_GET_DELETED, false);
+            actionList.put(action);
+            jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
+
+            // client_version
+            jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
+
+            JSONObject jsResponse = postRequest(jsPost);
+            return jsResponse.getJSONArray(GTaskStringUtils.GTASK_JSON_TASKS);
+        } catch (JSONException e) {//代码块：处理异常
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new ActionFailureException("get task list: handing jsonobject failed");
+        }
+    }
+
+    public Account getSyncAccount() {
+        return mAccount;
+    }//获得同步账户。
+
+    public void resetUpdateArray() {
+        mUpdateArray = null;
+    }//重置更新内容
+}

doc/精读报告/gtask/remote/GTaskManager.doc

@@ -0,0 +1,800 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.remote;//实现同步功能的主函数
+
+import android.app.Activity;//在包里引用各种类
+import android.content.ContentResolver;
+import android.content.ContentUris;
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.util.Log;
+
+import net.micode.notes.R;//引用小米便签中的类
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.DataColumns;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.gtask.data.MetaData;
+import net.micode.notes.gtask.data.Node;
+import net.micode.notes.gtask.data.SqlNote;
+import net.micode.notes.gtask.data.Task;
+import net.micode.notes.gtask.data.TaskList;
+import net.micode.notes.gtask.exception.ActionFailureException;
+import net.micode.notes.gtask.exception.NetworkFailureException;
+import net.micode.notes.tool.DataUtils;
+import net.micode.notes.tool.GTaskStringUtils;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.Map;
+
+
+public class GTaskManager {//声明一个类，类名称的命名规范：所有单词的首字母大写
+    private static final String TAG = GTaskManager.class.getSimpleName();//定义了一系列静态变量来显示GTask当前的状态（1）设置GTask的TAG
+
+    public static final int STATE_SUCCESS = 0;//成功
+
+    public static final int STATE_NETWORK_ERROR = 1;//网络错误
+
+    public static final int STATE_INTERNAL_ERROR = 2;//内部错误
+
+    public static final int STATE_SYNC_IN_PROGRESS = 3;//进程同步中
+
+    public static final int STATE_SYNC_CANCELLED = 4;//取消同步
+
+    private static GTaskManager mInstance = null;//private 定义一系列不可被外部的类访问的量
+
+    private Activity mActivity;//构造函数
+
+    private Context mContext;
+
+    private ContentResolver mContentResolver;
+
+    private boolean mSyncing;
+
+    private boolean mCancelled;
+
+    private HashMap<String, TaskList> mGTaskListHashMap;
+
+    private HashMap<String, Node> mGTaskHashMap;
+
+    private HashMap<String, MetaData> mMetaHashMap;
+
+    private TaskList mMetaList;
+
+    private HashSet<Long> mLocalDeleteIdMap;
+
+    private HashMap<String, Long> mGidToNid;
+
+    private HashMap<Long, String> mNidToGid;
+
+    private GTaskManager() {//方法：类的构造函数，对其内部变量进行初始化
+        mSyncing = false;//正在同步标识，false代表未同步
+        mCancelled = false;
+        mGTaskListHashMap = new HashMap<String, TaskList>();//全局标识，flase代表可以执行
+        mGTaskHashMap = new HashMap<String, Node>();//<>代表Java的泛型,就是创建一个用类型作为参数的类。
+        mMetaHashMap = new HashMap<String, MetaData>();//创建一个删除本地ID的map
+        mMetaList = null;//创建一个删除本地ID的map
+        mLocalDeleteIdMap = new HashSet<Long>();
+        mGidToNid = new HashMap<String, Long>();//建立一个google id到节点id的映射
+        mNidToGid = new HashMap<Long, String>();//创建一个节点id到google id的映射
+    }
+
+    public static synchronized GTaskManager getInstance() {//synchronized指明该函数可以运行在多线程下
+        if (mInstance == null) {//初始化mInstance
+            mInstance = new GTaskManager();//初始化
+        }
+        return mInstance;
+    }
+
+    public synchronized void setActivityContext(Activity activity) {//对类的当前实例进行加锁，防止其他线程同时访问该类的该实例的所有synchronized块
+        // used for getting authtoken//获得操作指令
+        mActivity = activity;
+    }
+
+    public int sync(Context context, GTaskASyncTask asyncTask) {//实现本地和远程同步的操作
+        if (mSyncing) {//正在同步时，日志中写入正在同步
+            Log.d(TAG, "Sync is in progress");//debug，进程已在同步中
+            return STATE_SYNC_IN_PROGRESS;//返回同步状态
+        }
+        mContext = context;//代码块：对同步时GTaskManager的属性进行更新
+        mContentResolver = mContext.getContentResolver();//对GTaskManager的属性进行更新
+        mSyncing = true;//初始化各种标志变量
+        mCancelled = false;
+        mGTaskListHashMap.clear();//各种环境清空
+        mGTaskHashMap.clear();
+        mMetaHashMap.clear();
+        mLocalDeleteIdMap.clear();
+        mGidToNid.clear();
+        mNidToGid.clear();
+
+        try {//异常处理程序
+            GTaskClient client = GTaskClient.getInstance();//创建一个用户的实例
+            client.resetUpdateArray();//getInstance即为创建一个实例
+
+            // login google task //更新数组操作
+            if (!mCancelled) {//登陆用户端
+                if (!client.login(mActivity)) {//执行登录程序，登录到google task
+                    throw new NetworkFailureException("login google task failed");//抛出异常，登录 google 任务失败
+                }
+            }
+
+            // get the task list from google
+            asyncTask.publishProgess(mContext.getString(R.string.sync_progress_init_list));
+            initGTaskList();//调用下面自定义的方法，初始化GTaskList
+
+            // do content sync work
+            asyncTask.publishProgess(mContext.getString(R.string.sync_progress_syncing));
+            syncContent();//同步便签内容
+        } catch (NetworkFailureException e) {//网络连接中断
+            Log.e(TAG, e.toString());//获取异常类型和异常详细消息
+            return STATE_NETWORK_ERROR;
+        } catch (ActionFailureException e) {//操作未完成
+            Log.e(TAG, e.toString());
+            return STATE_INTERNAL_ERROR;
+        } catch (Exception e) {//处理各种异常
+            Log.e(TAG, e.toString());//获取异常类型和异常详细消息
+            e.printStackTrace();
+            return STATE_INTERNAL_ERROR;
+        } finally {//代码块：在同步操作结束之后，更新GTaskManager的属性
+            mGTaskListHashMap.clear();//同步结束后清空环境
+            mGTaskHashMap.clear();
+            mMetaHashMap.clear();
+            mLocalDeleteIdMap.clear();
+            mGidToNid.clear();
+            mNidToGid.clear();
+            mSyncing = false;
+        }
+
+        return mCancelled ? STATE_SYNC_CANCELLED : STATE_SUCCESS;//语句：若在同步时操作未取消，则说明同步成功，否则返回同步操作取消
+    }
+
+    private void initGTaskList() throws NetworkFailureException {//初始化GTask列表，将google上的JSONTaskList转为本地任务列表
+        if (mCancelled)//是否中途取消
+            return;
+        GTaskClient client = GTaskClient.getInstance();//创建一个用户的实例
+        try {//客户端获取任务列表
+            JSONArray jsTaskLists = client.getTaskLists();//客户端获取任务列表jsTaskLists
+
+            // init meta list first
+            mMetaList = null;//初始化元数据列表
+            for (int i = 0; i < jsTaskLists.length(); i++) {//代码块：对获取到任务列表中的每一个元素进行操作
+                JSONObject object = jsTaskLists.getJSONObject(i);//取出单个JSON对象
+                String gid = object.getString(GTaskStringUtils.GTASK_JSON_ID);//获取它的id
+                String name = object.getString(GTaskStringUtils.GTASK_JSON_NAME);//获取它的名字
+
+                if (name
+                        .equals(GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_META)) {//如果 name 等于 字符串 "[MIUI_Notes]" + "METADATA"，执行if语句块
+                    mMetaList = new TaskList();//新建数组，并为新建的数组设定内容
+                    mMetaList.setContentByRemoteJSON(object);//新建一个元数据列表
+
+                    // load meta data
+                    JSONArray jsMetas = client.getTaskList(gid);//将JSON中部分数据复制到自己定义的对象中相对应的数据：name->mname...
+                    for (int j = 0; j < jsMetas.length(); j++) {//代码块：把jsMetas里的每一个有识别码的metaData都放到哈希表中
+                        object = (JSONObject) jsMetas.getJSONObject(j);//获取一个JSON类型的对象
+                        MetaData metaData = new MetaData();//新建一个Metadata
+                        metaData.setContentByRemoteJSON(object);//新建MetaData
+                        if (metaData.isWorthSaving()) {//需要保存时，将子任务加入到主任务中
+                            mMetaList.addChildTask(metaData);//新建一个元数据列表。
+                            if (metaData.getGid() != null) {//操作getGid：取得组识别码函数
+                                mMetaHashMap.put(metaData.getRelatedGid(), metaData);//语句：把元数据放到哈希表中
+                            }
+                        }
+                    }
+                }
+            }
+
+            // create meta list if not existed
+            if (mMetaList == null) {//代码块：若元数据列表不存在则创建一个
+                mMetaList = new TaskList();//元数据列表不存在，则在客户端创建一个
+                mMetaList.setName(GTaskStringUtils.MIUI_FOLDER_PREFFIX
+                        + GTaskStringUtils.FOLDER_META);
+                GTaskClient.getInstance().createTaskList(mMetaList);
+            }
+
+            // init task list
+            for (int i = 0; i < jsTaskLists.length(); i++) {//以下循环用于初始化任务列表
+                JSONObject object = jsTaskLists.getJSONObject(i);//代码块：先获取列表中每一个节点的属性
+                String gid = object.getString(GTaskStringUtils.GTASK_JSON_ID);//通过getString函数传入本地某个标志数据的名称，获取其在远端的名称
+                String name = object.getString(GTaskStringUtils.GTASK_JSON_NAME);//获取JSON名字
+
+                if (name.startsWith(GTaskStringUtils.MIUI_FOLDER_PREFFIX)
+                        && !name.equals(GTaskStringUtils.MIUI_FOLDER_PREFFIX
+                                + GTaskStringUtils.FOLDER_META)) {
+                    TaskList tasklist = new TaskList();//语句： 创建一个新的任务列表
+                    tasklist.setContentByRemoteJSON(object);//语句：对任务列表的内容进行设置
+                    mGTaskListHashMap.put(gid, tasklist);//对任务列表的内容进行设置
+                    mGTaskHashMap.put(gid, tasklist);
+
+                    // load tasks
+                    JSONArray jsTasks = client.getTaskList(gid);//获取任务id号
+                    for (int j = 0; j < jsTasks.length(); j++) {//任务id号
+                        object = (JSONObject) jsTasks.getJSONObject(j);
+                        gid = object.getString(GTaskStringUtils.GTASK_JSON_ID);//语句：获取当前任务的gid
+                        Task task = new Task();
+                        task.setContentByRemoteJSON(object);//语句：设置任务内容
+                        if (task.isWorthSaving()) {//语句：判断该任务有无价值保存
+                            task.setMetaInfo(mMetaHashMap.get(gid));//判断该任务是否有价值
+                            tasklist.addChildTask(task);
+                            mGTaskHashMap.put(gid, task);
+                        }
+                    }
+                }
+            }
+        } catch (JSONException e) {//初始化时捕捉异常
+            Log.e(TAG, e.toString());//获取异常类型和异常详细消息
+            e.printStackTrace();
+            throw new ActionFailureException("initGTaskList: handing JSONObject failed");//抛出异常，提交 JSONObject 失败
+        }
+    }
+
+    private void syncContent() throws NetworkFailureException {//实现内容同步
+        int syncType;//本地内容同步操作
+        Cursor c = null;//同步操作类
+        String gid;
+        Node node;//Node包含Sync_Action的不同类型
+
+        mLocalDeleteIdMap.clear();//初始化本地删除列表
+
+        if (mCancelled) {//对于本地已删除的便签采取的动作
+            return;
+        }
+
+        // for local deleted note
+        try {//代码块：对于删除本地便签的操作的同步
+            c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE,//语句：指针指向待删除的便签位置
+                    "(type<>? AND parent_id=?)", new String[] {
+                            String.valueOf(Notes.TYPE_SYSTEM), String.valueOf(Notes.ID_TRASH_FOLER)
+                    }, null);
+            if (c != null) {//代码块：若获取到的待删除便签不为空，则进行同步操作
+                while (c.moveToNext()) {//通过while用指针遍历所有结点
+                    gid = c.getString(SqlNote.GTASK_ID_COLUMN);//语句：获取待删除便签的gid
+                    node = mGTaskHashMap.get(gid);//语句：获取待删除便签的节点
+                    if (node != null) {//节点非空则从哈希表里删除，并进行同步操作
+                        mGTaskHashMap.remove(gid);//语句：将待删除的节点对应的google id从映射表中移除
+                        doContentSync(Node.SYNC_ACTION_DEL_REMOTE, node, c);//语句：在远程删除对应节点
+                    }
+
+                    mLocalDeleteIdMap.add(c.getLong(SqlNote.ID_COLUMN));//查找不到时，在日志中记录信息
+                }
+            } else {//若c结点为空，即寻找错误的时候，报错
+                Log.w(TAG, "failed to query trash folder");//警告，询问垃圾文件夹失败
+            }
+        } finally {//代码块：最后把c关闭并重置代码块：
+            if (c != null) {//结束操作之后，将指针指向内容关闭并将指针置空
+                c.close();//记得关闭 cursor 所指文件
+                c = null;//cursor 置空
+            }
+        }
+
+        // sync folder first
+        syncFolder();//语句：对文件夹进行同步
+
+        // for note existing in database
+        try {//对于数据库中已经存在的便签，采取以下操作
+            c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE,//语句：使c指针指向待操作的便签位置
+                    "(type=? AND parent_id<>?)", new String[] {//c指针指向待操作的位置
+                            String.valueOf(Notes.TYPE_NOTE), String.valueOf(Notes.ID_TRASH_FOLER)
+                    }, NoteColumns.TYPE + " DESC");
+            if (c != null) {//query语句的用法
+                while (c.moveToNext()) {//语句：指针向后移动
+                    gid = c.getString(SqlNote.GTASK_ID_COLUMN);//语句：获取待操作的便签的gid
+                    node = mGTaskHashMap.get(gid);//语句：获取待操作的便签的节点
+                    if (node != null) {//若结点不为空，将其对应的google id从映射表中移除，然后建立google id到节点id的映射（通过hashmap）、gid和nid之间的映射表
+                        mGTaskHashMap.remove(gid);
+                        mGidToNid.put(gid, c.getLong(SqlNote.ID_COLUMN));//建立google id到节点id的映射
+                        mNidToGid.put(c.getLong(SqlNote.ID_COLUMN), gid);//通过hashmap建立联系
+                        syncType = node.getSyncAction(c);//语句：更新此时的同步类型
+                    } else {//代码块：如果note是空的，则判断c的trim（）的长度是否为0，如果是则设置同步类型为ADD REMOTE,否则设置为DEL LOCAL
+                        if (c.getString(SqlNote.GTASK_ID_COLUMN).trim().length() == 0) {//语句：若本地增加了内容，则远程也要增加内容
+                            // local add
+                            syncType = Node.SYNC_ACTION_ADD_REMOTE;//远程增加内容
+                        } else {//语句：若本地删除了内容，则远程也要删除内容应的gid
+                            // remote delete
+                            syncType = Node.SYNC_ACTION_DEL_LOCAL;//本地删除
+                        }
+                    }
+                    doContentSync(syncType, node, c);//进行同步操作
+                }
+            } else {
+                Log.w(TAG, "failed to query existing note in database");//查询失败时在日志中写回错误信息
+            }
+
+        } finally {//代码块：在最后关闭c并重置
+            if (c != null) {//代码块：结束操作之后，将指针指向内容关闭并将指针置空
+                c.close();//关闭 cursor 所指文件
+                c = null;//cursor 置空
+            }
+        }
+
+        // go through remaining items
+        Iterator<Map.Entry<String, Node>> iter = mGTaskHashMap.entrySet().iterator();//扫描剩下的项目，逐个进行同步
+        while (iter.hasNext()) {//迭代
+            Map.Entry<String, Node> entry = iter.next();
+            node = entry.getValue();//getValue()可以获取指定对象的属性值
+            doContentSync(Node.SYNC_ACTION_ADD_LOCAL, node, null);//语句：在本地增加这些节点
+        }
+
+        // mCancelled can be set by another thread, so we neet to check one by
+        // one
+        // clear local delete table
+        if (!mCancelled) {
+            if (!DataUtils.batchDeleteNotes(mContentResolver, mLocalDeleteIdMap)) {//语句：终止标识有可能被其他进程改变，因此需要一个个进行检查
+                throw new ActionFailureException("failed to batch-delete local deleted notes");//终止标识有可能被其他线程改变
+            }
+        }
+
+        // refresh local sync id
+        if (!mCancelled) {//更新同步表
+            GTaskClient.getInstance().commitUpdate();//更新同步表
+            refreshLocalSyncId();//更新同步的id
+        }
+
+    }
+
+    private void syncFolder() throws NetworkFailureException {//同步文件夹
+        Cursor c = null;//同步文件夹
+        String gid;
+        Node node;
+        int syncType;
+
+        if (mCancelled) {//语句：判断是否取消该操作
+            return;
+        }
+
+        // for root folder
+        try {//对于根文件夹
+            c = mContentResolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI,//语句：使指针指向根文件夹的位置
+                    Notes.ID_ROOT_FOLDER), SqlNote.PROJECTION_NOTE, null, null, null);//使指针指向根文件夹的位置
+            if (c != null) {
+                c.moveToNext();
+                gid = c.getString(SqlNote.GTASK_ID_COLUMN);//语句：获取指针指向内容对应的gid
+                node = mGTaskHashMap.get(gid);//语句：获取该gid所代表的节点
+                if (node != null) {//获取gid所代表的节点
+                    mGTaskHashMap.remove(gid);
+                    mGidToNid.put(gid, (long) Notes.ID_ROOT_FOLDER);//语句：将该节点的gid到nid的映射加入映射表
+                    mNidToGid.put((long) Notes.ID_ROOT_FOLDER, gid);
+                    // for system folder, only update remote name if necessary
+                    if (!node.getName().equals(//添加MIUI文件前缀
+                            GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_DEFAULT))
+                        doContentSync(Node.SYNC_ACTION_UPDATE_REMOTE, node, c);
+                } else {
+                    doContentSync(Node.SYNC_ACTION_ADD_REMOTE, node, c);//语句：若非系统文件夹则在远程进行增加节点操作
+                }
+            } else {
+                Log.w(TAG, "failed to query root folder");//出现异常时，在日志中写回出错信息
+            }
+        } finally {//结束操作之后，最后将指针关闭，并将指针置空。方法与之前相同
+            if (c != null) {//代码块：结束操作之后，将指针指向内容关闭并将指针置空
+                c.close();//关闭 cursor 所指文件
+                c = null;//cursor 置空
+            }
+        }
+
+        // for call-note folder
+        try {//对于电话号码数据文件
+            c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE, "(_id=?)",//语句：使指针指向文件夹的位置
+                    new String[] {//添加MIUI文件前缀
+                        String.valueOf(Notes.ID_CALL_RECORD_FOLDER)//添加MIUI文件前缀
+                    }, null);
+            if (c != null) {
+                if (c.moveToNext()) {
+                    gid = c.getString(SqlNote.GTASK_ID_COLUMN);//语句：获取指针指向内容对应的gid
+                    node = mGTaskHashMap.get(gid);//语句：获取指针指向内容对应的gid
+                    if (node != null) {
+                        mGTaskHashMap.remove(gid);
+                        mGidToNid.put(gid, (long) Notes.ID_CALL_RECORD_FOLDER);//语句：将该节点的gid到nid的映射加入映射表
+                        mNidToGid.put((long) Notes.ID_CALL_RECORD_FOLDER, gid);
+                        // for system folder, only update remote name if
+                        // necessary
+                        if (!node.getName().equals(//语句：若当前访问的文件夹是系统文件夹则只需要更新
+                                GTaskStringUtils.MIUI_FOLDER_PREFFIX//若当前访问的文件夹是系统文件夹则只需更新
+                                        + GTaskStringUtils.FOLDER_CALL_NOTE))
+                            doContentSync(Node.SYNC_ACTION_UPDATE_REMOTE, node, c);
+                    } else {
+                        doContentSync(Node.SYNC_ACTION_ADD_REMOTE, node, c);//语句：若非系统文件夹则在远程进行增加节点操作
+                    }
+                }
+            } else {
+                Log.w(TAG, "failed to query call note folder");//警告，询问通讯便签文件夹失败
+            }
+        } finally {
+            if (c != null) {//代码块：结束操作之后，将指针指向内容关闭并将指针置空
+                c.close();//关闭 cursor 所指文件
+                c = null;//cursor 置空
+            }
+        }
+
+        // for local existing folders
+        try {//对于本地已存在的文件的操作
+            c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE,// 语句：使指针指向第一个文件夹的位置
+                    "(type=? AND parent_id<>?)", new String[] {//使指针指向第一个文件夹的位置
+                            String.valueOf(Notes.TYPE_FOLDER), String.valueOf(Notes.ID_TRASH_FOLER)
+                    }, NoteColumns.TYPE + " DESC");
+            if (c != null) {
+                while (c.moveToNext()) {//语句：使指针遍历所有的文件夹
+                    gid = c.getString(SqlNote.GTASK_ID_COLUMN);
+                    node = mGTaskHashMap.get(gid);
+                    if (node != null) {
+                        mGTaskHashMap.remove(gid);
+                        mGidToNid.put(gid, c.getLong(SqlNote.ID_COLUMN));//语句：获取指针指向内容对应的gid
+                        mNidToGid.put(c.getLong(SqlNote.ID_COLUMN), gid);//语句：获取指针指向内容对应的gid
+                        syncType = node.getSyncAction(c);//语句：更新同步类型
+                    } else {//更新同步类型
+                        if (c.getString(SqlNote.GTASK_ID_COLUMN).trim().length() == 0) {//语句：若本地增加了内容，则远程也要增加内容
+                            // local add
+                            syncType = Node.SYNC_ACTION_ADD_REMOTE;//远程添加
+                        } else {//语句：若远程删除了内容，则本地也要删除内容
+                            // remote delete
+                            syncType = Node.SYNC_ACTION_DEL_LOCAL;//本地删除
+                        }
+                    }
+                    doContentSync(syncType, node, c);//语句：进行同步操作
+                }
+            } else {//进行同步操作
+                Log.w(TAG, "failed to query existing folder");//警告，询问已创建的文件夹失败
+            }
+        } finally {
+            if (c != null) {//代码块：结束操作之后，将指针指向内容关闭并将指针置空
+                c.close();//关闭 cursor 所指文件
+                c = null;//cursor 置空
+            }
+        }
+
+        // for remote add folders
+        Iterator<Map.Entry<String, TaskList>> iter = mGTaskListHashMap.entrySet().iterator();//远程添加文件需要执行的操作
+        while (iter.hasNext()) {//语句：使用迭代器对远程增添的内容进行遍
+            Map.Entry<String, TaskList> entry = iter.next();
+            gid = entry.getKey();//语句：获取对应的gid
+            node = entry.getValue();//语句：获取gid对应的节点
+            if (mGTaskHashMap.containsKey(gid)) {
+                mGTaskHashMap.remove(gid);
+                doContentSync(Node.SYNC_ACTION_ADD_LOCAL, node, null);//语句：进行本地增添操作
+            }
+        }
+
+        if (!mCancelled)
+            GTaskClient.getInstance().commitUpdate();//语句：如果没有取消，在GTsk的客户端进行实例的提交更新
+    }
+
+    private void doContentSync(int syncType, Node node, Cursor c) throws NetworkFailureException {//功能：syncType分类
+        if (mCancelled) {//进行本地增添操作
+            return;
+        }
+
+        MetaData meta;
+        switch (syncType) {//根据同步类型选择操作
+            case Node.SYNC_ACTION_ADD_LOCAL://远程添加
+                addLocalNode(node);//本地添加
+                break;
+            case Node.SYNC_ACTION_ADD_REMOTE://本地删除
+                addRemoteNode(node, c);//本地删除
+                break;
+            case Node.SYNC_ACTION_DEL_LOCAL://远程删除
+                meta = mMetaHashMap.get(c.getString(SqlNote.GTASK_ID_COLUMN));
+                if (meta != null) {
+                    GTaskClient.getInstance().deleteNode(meta);
+                }
+                mLocalDeleteIdMap.add(c.getLong(SqlNote.ID_COLUMN));
+                break;
+            case Node.SYNC_ACTION_DEL_REMOTE://更新本地数据
+                meta = mMetaHashMap.get(node.getGid());//更新本地数据
+                if (meta != null) {
+                    GTaskClient.getInstance().deleteNode(meta);
+                }
+                GTaskClient.getInstance().deleteNode(node);
+                break;
+            case Node.SYNC_ACTION_UPDATE_LOCAL://更新远程数据
+                updateLocalNode(node, c);
+                break;
+            case Node.SYNC_ACTION_UPDATE_REMOTE:
+                updateRemoteNode(node, c);
+                break;
+            case Node.SYNC_ACTION_UPDATE_CONFLICT://同步出错
+                // merging both modifications maybe a good idea
+                // right now just use local update simply
+                updateRemoteNode(node, c);
+                break;
+            case Node.SYNC_ACTION_NONE://代码块：空操作
+                break;//空操作
+            case Node.SYNC_ACTION_ERROR://代码块：操作错误
+            default://代码块：default:同步类型不在规定的类型范围内
+                throw new ActionFailureException("unkown sync action type");//抛出异常，未知的同步行为类型
+        }
+    }
+
+    private void addLocalNode(Node node) throws NetworkFailureException {//功能：本地增加Node
+        if (mCancelled) {//这个函数是添加本地结点，参数node即为要添加的本地结点
+            return;
+        }
+
+        SqlNote sqlNote;
+        if (node instanceof TaskList) {//节点是任务列表中的一个节点
+            if (node.getName().equals(//代码块：在根目录中增加节点
+                    GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_DEFAULT)) {
+                sqlNote = new SqlNote(mContext, Notes.ID_ROOT_FOLDER);
+            } else if (node.getName().equals(//代码块：在存放电话号码便签的文件夹中增加节点
+                    GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_CALL_NOTE)) {
+                sqlNote = new SqlNote(mContext, Notes.ID_CALL_RECORD_FOLDER);
+            } else {//代码块：如果在其他文件夹里则用一般操作设置sqlNote的参数
+                sqlNote = new SqlNote(mContext);//代码块：若没有存放的文件夹，则将其放在根文件夹中
+                sqlNote.setContent(node.getLocalJSONFromContent());//从本地任务列表中获取内容
+                sqlNote.setParentId(Notes.ID_ROOT_FOLDER);
+            }
+        } else {//代码块：若待增添节点不是任务列表中的节点，进一步操作
+            sqlNote = new SqlNote(mContext);
+            JSONObject js = node.getLocalJSONFromContent();//语句：从待增添节点中获取jsonobject对象
+            try {//异常判断
+                if (js.has(GTaskStringUtils.META_HEAD_NOTE)) {
+                    JSONObject note = js.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);//语句：获取对应便签的jsonobject对象
+                    if (note.has(NoteColumns.ID)) {//语句：判断便签中是否有条目
+                        long id = note.getLong(NoteColumns.ID);
+                        if (DataUtils.existInNoteDatabase(mContentResolver, id)) {//id存在时删除id
+                            // the id is not available, have to create a new one
+                            note.remove(NoteColumns.ID);
+                        }
+                    }
+                }
+
+                if (js.has(GTaskStringUtils.META_HEAD_DATA)) {//以下为判断便签中的数据条目
+                    JSONArray dataArray = js.getJSONArray(GTaskStringUtils.META_HEAD_DATA);
+                    for (int i = 0; i < dataArray.length(); i++) {//依次删除存在的data的ID
+                        JSONObject data = dataArray.getJSONObject(i);//语句：获取对应数据的jsonobject对象
+                        if (data.has(DataColumns.ID)) {//语句：判断数据中是否有条目
+                            long dataId = data.getLong(DataColumns.ID);
+                            if (DataUtils.existInDataDatabase(mContentResolver, dataId)) {//data id存在时删除已建立的对应ID
+                                // the data id is not available, have to create
+                                // a new one
+                                data.remove(DataColumns.ID);
+                            }
+                        }
+                    }
+
+                }
+            } catch (JSONException e) {//出现异常时，打印异常信息
+                Log.w(TAG, e.toString());//获取异常类型和异常详细消息
+                e.printStackTrace();
+            }
+            sqlNote.setContent(js);//语句：将之前的操作获取到的js更新至该节点中
+
+            Long parentId = mGidToNid.get(((Task) node).getParent().getGid());//代码块：找到父任务的ID号，并作为sqlNote的父任务的ID，没有父任务则报错
+            if (parentId == null) {//语句：当不能找到该任务上一级的id时报错
+                Log.e(TAG, "cannot find task's parent id locally");//本地无法找到父进程id
+                throw new ActionFailureException("cannot add local node");//报告无法添加本地节点
+            }
+            sqlNote.setParentId(parentId.longValue());
+        }
+
+        // create the local node
+        sqlNote.setGtaskId(node.getGid());//设置google task id
+        sqlNote.commit(false);//更新本地便签
+
+        // update gid-nid mapping
+        mGidToNid.put(node.getGid(), sqlNote.getId());//语句：更新gid与nid的映射表
+        mNidToGid.put(sqlNote.getId(), node.getGid());
+
+        // update meta
+        updateRemoteMeta(node.getGid(), sqlNote);//语句：更新远程的数据
+    }
+
+    private void updateLocalNode(Node node, Cursor c) throws NetworkFailureException {//函数：更新本地节点，两个传入参数，一个是待更新的节点，一个是指向待增加位置的指针
+        if (mCancelled) {//如果正在取消同步，直接返回
+            return;
+        }
+
+        SqlNote sqlNote;//新建一个sql节点并将内容存储进Node中
+        // update the note locally
+        sqlNote = new SqlNote(mContext, c);//语句：在指针指向处创建一个新的节点
+        sqlNote.setContent(node.getLocalJSONFromContent());//语句：利用待更新节点中的内容对数据库节点进行设置
+
+        Long parentId = (node instanceof Task) ? mGidToNid.get(((Task) node).getParent().getGid())//语句： 设置父任务的ID，通过判断node是不是Task的实例
+                : new Long(Notes.ID_ROOT_FOLDER);
+        if (parentId == null) {//语句：当不能找到该任务上一级的id时报错
+            Log.e(TAG, "cannot find task's parent id locally");//错误，不能在本地找到任务的父 id
+            throw new ActionFailureException("cannot update local node");//抛出异常，不能更新本地节点
+        }
+        sqlNote.setParentId(parentId.longValue());//设置该任务节点上一级的id
+        sqlNote.commit(true);//抛出异常，不能更新本地节点
+
+        // update meta info
+        updateRemoteMeta(node.getGid(), sqlNote);//升级meta
+    }
+
+    private void addRemoteNode(Node node, Cursor c) throws NetworkFailureException {//添加远程节点
+        if (mCancelled) {//如果正在取消同步，直接返回
+            return;
+        }
+
+        SqlNote sqlNote = new SqlNote(mContext, c);//新建一个sql节点并将内容存储进Node中
+        Node n;
+
+        // update remotely
+        if (sqlNote.isNoteType()) {//语句：若待增添的节点为任务节点，进一步操作
+            Task task = new Task();
+            task.setContentByLocalJSON(sqlNote.getContent());
+
+            String parentGid = mNidToGid.get(sqlNote.getParentId());//找不到parentID时，报错
+            if (parentGid == null) {
+                Log.e(TAG, "cannot find task's parent tasklist");//错误，无法找到任务的父列表
+                throw new ActionFailureException("cannot add remote task");//抛出异常，无法添加云端任务
+            }
+            mGTaskListHashMap.get(parentGid).addChildTask(task);//在本地生成的GTaskList中增加子结点
+
+            GTaskClient.getInstance().createTask(task);//在本地生成的GTaskList中增加子结点
+            n = (Node) task;
+
+            // add meta//添加元数据
+            updateRemoteMeta(task.getGid(), sqlNote);
+        } else {
+            TaskList tasklist = null;
+
+            // we need to skip folder if it has already existed//当文件夹存在则跳过，若不存在则创建新的文件夹
+            String folderName = GTaskStringUtils.MIUI_FOLDER_PREFFIX;//代码块：当文件夹已经存在则跳过处理，若不存在则创建新的文件夹
+            if (sqlNote.getId() == Notes.ID_ROOT_FOLDER)//按照文件夹的形式进行命名
+                folderName += GTaskStringUtils.FOLDER_DEFAULT;//语句：若为根文件夹则按根文件夹命名
+            else if (sqlNote.getId() == Notes.ID_CALL_RECORD_FOLDER)
+                folderName += GTaskStringUtils.FOLDER_CALL_NOTE;//语句：若为电话号码便签文件夹则按电话号码便签命名
+            else
+                folderName += sqlNote.getSnippet();
+
+            Iterator<Map.Entry<String, TaskList>> iter = mGTaskListHashMap.entrySet().iterator();//使用iterator作为map接口，对map进行遍历
+            while (iter.hasNext()) {//iterator迭代器，通过统一的接口迭代所有的map元素
+                Map.Entry<String, TaskList> entry = iter.next();
+                String gid = entry.getKey();
+                TaskList list = entry.getValue();
+
+                if (list.getName().equals(folderName)) {//代码块：若寻找到的任务列表已存在，则直接在里面更新
+                    tasklist = list;//找不到可以匹配的任务链
+                    if (mGTaskHashMap.containsKey(gid)) {
+                        mGTaskHashMap.remove(gid);
+                    }
+                    break;
+                }
+            }
+
+            // no match we can add now
+            if (tasklist == null) {//若没有匹配的任务列表，则创建一个新的任务列表
+                tasklist = new TaskList();//直接新建一个任务链
+                tasklist.setContentByLocalJSON(sqlNote.getContent());
+                GTaskClient.getInstance().createTaskList(tasklist);
+                mGTaskListHashMap.put(tasklist.getGid(), tasklist);
+            }
+            n = (Node) tasklist;
+        }
+
+        // update local note//进行本地节点的更新
+        sqlNote.setGtaskId(n.getGid());//创建id间的映射
+        sqlNote.commit(false);
+        sqlNote.resetLocalModified();
+        sqlNote.commit(true);
+
+        // gid-id mapping//进行gid与nid映射关系的更新
+        mGidToNid.put(n.getGid(), sqlNote.getId());//代码块：更新gid-nid映射表
+        mNidToGid.put(sqlNote.getId(), n.getGid());
+    }
+
+    private void updateRemoteNode(Node node, Cursor c) throws NetworkFailureException {//更新远程节点
+        if (mCancelled) {//如果正在取消同步，直接返回
+            return;
+        }
+
+        SqlNote sqlNote = new SqlNote(mContext, c);//语句：在指针指向处创建一个新的节点
+
+        // update remotely
+        node.setContentByLocalJSON(sqlNote.getContent());//代码块：远程更新
+        GTaskClient.getInstance().addUpdateNode(node);//GTaskClient用途为从本地登陆远端服务器
+
+        // update meta
+        updateRemoteMeta(node.getGid(), sqlNote);//语句：更新数据
+
+        // move task if necessary
+        if (sqlNote.isNoteType()) {//判断节点类型是否符合要求
+            Task task = (Task) node;//新建一个task节点
+            TaskList preParentList = task.getParent();//找到当前任务列表的父节点google id和之前父任务链
+
+            String curParentGid = mNidToGid.get(sqlNote.getParentId());//curParentGid为通过光标在数据库中找到sqlNote的mParentId，再通过mNidToGid由long类型转为String类型的Gid
+            if (curParentGid == null) {//代码块：找不到当前任务的上一级任务列表，报错
+                Log.e(TAG, "cannot find task's parent tasklist");//错误，无法找到任务的父列表
+                throw new ActionFailureException("cannot update remote task");//抛出异常，无法添加云端任务
+            }
+            TaskList curParentList = mGTaskListHashMap.get(curParentGid);//通过HashMap找到对应Gid的TaskList
+
+            if (preParentList != curParentList) {//语句：若两个上一级任务列表不一致，进行任务的移动，从之前的任务列表中移动到该列表中
+                preParentList.removeChildTask(task);
+                curParentList.addChildTask(task);
+                GTaskClient.getInstance().moveTask(task, preParentList, curParentList);
+            }
+        }
+
+        // clear local modified flag
+        sqlNote.resetLocalModified();//清除本地的modified flag
+        sqlNote.commit(true);
+    }
+
+    private void updateRemoteMeta(String gid, SqlNote sqlNote) throws NetworkFailureException {//更新远程元数组的google id和数据库节点
+        if (sqlNote != null && sqlNote.isNoteType()) {//判断节点类型是否符合，类型符合时才进行更新操作
+            MetaData metaData = mMetaHashMap.get(gid);//从google id获取任务列表
+            if (metaData != null) {//语句：若元数据组为空，则创建一个新的元数据组
+                metaData.setMeta(gid, sqlNote.getContent());//任务列表不存在时 新建一个空的任务列表，并将其放入google id中
+                GTaskClient.getInstance().addUpdateNode(metaData);
+            } else {//语句：若元数据组不为空，则进行更新
+                metaData = new MetaData();
+                metaData.setMeta(gid, sqlNote.getContent());
+                mMetaList.addChildTask(metaData);
+                mMetaHashMap.put(gid, metaData);
+                GTaskClient.getInstance().createTask(metaData);
+            }
+        }
+    }
+
+    private void refreshLocalSyncId() throws NetworkFailureException {//刷新本地便签id，从远程同步
+        if (mCancelled) {
+            return;
+        }//获取最近的gtask list
+
+        // get the latest gtask list//获取最新的gtask列表
+        mGTaskHashMap.clear();//否则，初始化hash表
+        mGTaskListHashMap.clear();
+        mMetaHashMap.clear();
+        initGTaskList();
+
+        Cursor c = null;
+        try {
+            c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE,
+                    "(type<>? AND parent_id<>?)", new String[] {
+                            String.valueOf(Notes.TYPE_SYSTEM), String.valueOf(Notes.ID_TRASH_FOLER)
+                    }, NoteColumns.TYPE + " DESC");//query语句：五个参数，NoteColumns.TYPE + " DESC"-----为按类型递减顺序返回查询结果。newString[{String.valueOf(Notes.TYPE_SYSTEM),String.valueOf(Notes.ID_TRASH_FOLER)}------为选择参数。"(type<>? AND parent_id<>?)"-------指明返回行过滤器。SqlNote.PROJECTION_NOTE--------应返回的数据列的名字。Notes.CONTENT_NOTE_URI--------contentProvider包含所有数据集所对应的uri
+            if (c != null) {
+                while (c.moveToNext()) {//获取最新的GTask列表
+                    String gid = c.getString(SqlNote.GTASK_ID_COLUMN);
+                    Node node = mGTaskHashMap.get(gid);
+                    if (node != null) {
+                        mGTaskHashMap.remove(gid);
+                        ContentValues values = new ContentValues();
+                        values.put(NoteColumns.SYNC_ID, node.getLastModified());//在ContentValues中创建键值对。准备通过contentResolver写入数据
+                        mContentResolver.update(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI,
+                                c.getLong(SqlNote.ID_COLUMN)), values, null, null);
+                    } else {
+                        Log.e(TAG, "something is missed");//错误，部分内容丢失
+                        throw new ActionFailureException(
+                                "some local items don't have gid after sync");
+                    }
+                }
+            } else {//进行批量更改，选择参数为NULL，应该可以用insert替换，参数分别为表名和需要更新的value对象。
+                Log.w(TAG, "failed to query local note to refresh sync id");//警告，询问本地待同步更新的便签 id 失败
+            }
+        } finally {
+            if (c != null) {
+                c.close();
+                c = null;
+            }
+        }
+    }
+
+    public String getSyncAccount() {
+        return GTaskClient.getInstance().getSyncAccount().name;//返回待同步帐户的名称
+    }//获取同步账号
+
+    public void cancelSync() {
+        mCancelled = true;
+    }//取消同步，置mCancelled为true
+}

doc/精读报告/gtask/remote/GTaskSyncService.doc

@@ -0,0 +1,128 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)//GTask同步服务，用于提供同步服务（开始、取消同步），发送广播
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.remote;//Service是Android四大组件之一，通常用作在后台处理耗时的逻辑，不用与用户进行交互，即使应用被销毁依然可以继续工作。
+
+import android.app.Activity;//引用包
+import android.app.Service;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Bundle;
+import android.os.IBinder;
+
+public class GTaskSyncService extends Service {//Service是在一段不定的时间运行在后台，不和用户交互的应用组件
+    public final static String ACTION_STRING_NAME = "sync_action_type";//定义一系列静态变量
+
+    public final static int ACTION_START_SYNC = 0;//开始同步
+
+    public final static int ACTION_CANCEL_SYNC = 1;//取消同步
+
+    public final static int ACTION_INVALID = 2;//活动非法为2
+
+    public final static String GTASK_SERVICE_BROADCAST_NAME = "net.micode.notes.gtask.remote.gtask_sync_service";//服务广播的名称
+
+    public final static String GTASK_SERVICE_BROADCAST_IS_SYNCING = "isSyncing";//正在同步中
+
+    public final static String GTASK_SERVICE_BROADCAST_PROGRESS_MSG = "progressMsg";//进程消息
+
+    private static GTaskASyncTask mSyncTask = null;
+
+    private static String mSyncProgress = "";
+
+    private void startSync() {//开始同步
+        if (mSyncTask == null) {//若当前没有同步工作，申请一个task并把指针指向新任务，广播后执行
+            mSyncTask = new GTaskASyncTask(this, new GTaskASyncTask.OnCompleteListener() {
+                public void onComplete() {//实现了在GTaskASyncTask类中定义的接口onComplete( )
+                    mSyncTask = null;
+                    sendBroadcast("");//广播同步消息
+                    stopSelf();//当完成所有功能之后，将service停掉
+                }
+            });
+            sendBroadcast("");
+            mSyncTask.execute();//语句：调用同步执行的函数
+        }
+    }
+
+    private void cancelSync() {//取消同步
+        if (mSyncTask != null) {//同步的任务非空
+            mSyncTask.cancelSync();//如果正在同步，结束当前同步
+        }
+    }
+
+    @Override
+    public void onCreate() {
+        mSyncTask = null;
+    }//初始化一个service
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {//充当重启便签指令
+        Bundle bundle = intent.getExtras();//Bundle类用作携带数据，用于存放key-value明值对应形式的值。
+        if (bundle != null && bundle.containsKey(ACTION_STRING_NAME)) {//判断当前的同步状态，根据开始或取消，执行对应操作
+            switch (bundle.getInt(ACTION_STRING_NAME, ACTION_INVALID)) {//判断当前同步状态，启动或取消
+                case ACTION_START_SYNC://启动同步
+                    startSync();
+                    break;
+                case ACTION_CANCEL_SYNC://取消同步
+                    cancelSync();
+                    break;
+                default:
+                    break;
+            }
+            return START_STICKY;//等待新的intent来是这个service继续运行
+        }
+        return super.onStartCommand(intent, flags, startId);//调用父类的函数
+    }
+
+    @Override//处理内存不足的情况，即取消同步
+    public void onLowMemory() {//广播信息msg
+        if (mSyncTask != null) {
+            mSyncTask.cancelSync();
+        }
+    }
+
+    public IBinder onBind(Intent intent) {
+        return null;
+    }//函数：用于绑定操作的函数
+
+    public void sendBroadcast(String msg) {//发送广播内容
+        mSyncProgress = msg;
+        Intent intent = new Intent(GTASK_SERVICE_BROADCAST_NAME);//创建一个新的Intent
+        intent.putExtra(GTASK_SERVICE_BROADCAST_IS_SYNCING, mSyncTask != null);//附加INTENT中的相应参数的值
+        intent.putExtra(GTASK_SERVICE_BROADCAST_PROGRESS_MSG, msg);
+        sendBroadcast(intent);//发送这个通知
+    }
+
+    public static void startSync(Activity activity) {//启动同步
+        GTaskManager.getInstance().setActivityContext(activity);//任务管理器获取活动的内容
+        Intent intent = new Intent(activity, GTaskSyncService.class);//创建新intent
+        intent.putExtra(GTaskSyncService.ACTION_STRING_NAME, GTaskSyncService.ACTION_START_SYNC);//将之前初始化的各种字符串加入intent
+        activity.startService(intent);//开始同步服务
+    }
+
+    public static void cancelSync(Context context) {//取消同步
+        Intent intent = new Intent(context, GTaskSyncService.class);//显式构建intent，以函数参数context作为第一个参数，以自己GTaskSyncService.class作为目标活动
+        intent.putExtra(GTaskSyncService.ACTION_STRING_NAME, GTaskSyncService.ACTION_CANCEL_SYNC);//把想要传递的数据暂存到intent中，传递数据以“键值对”形式传入。键为"sync_action_type"，值为1
+        context.startService(intent);//使用startService（）执行intent，在本活动基础上打开GTaskSyncService活动
+    }
+
+    public static boolean isSyncing() {
+        return mSyncTask != null;
+    }//判断当前是否处于同步状态
+
+    public static String getProgressString() {
+        return mSyncProgress;
+    }//返回当前同步状态
+}

doc/精读报告/model/Note.doc

@@ -0,0 +1,253 @@
+/*//单个便签项
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.model;//包的名称
+import android.content.ContentProviderOperation;//更新、插入、删除数据
+import android.content.ContentProviderResult;//操作结果
+import android.content.ContentUris;//用于添加和获取Uri后面的ID
+import android.content.ContentValues;//存储基本数据类型数据
+import android.content.Context;//提供调用者的环境
+import android.content.OperationApplicationException;//操作数据容错
+import android.net.Uri;//远程容错
+import android.os.RemoteException;//远程容错
+import android.util.Log;//输出日志，比如说出错、警告等
+
+import net.micode.notes.data.Notes;//以下5行都是对小米便签数据处理的一些数据或操作相关
+import net.micode.notes.data.Notes.CallNote;
+import net.micode.notes.data.Notes.DataColumns;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.data.Notes.TextNote;
+
+import java.util.ArrayList;//以上全是导入
+
+
+public class Note {//这个类是用来刻画单个Note的
+    private ContentValues mNoteDiffValues;//ContentValues是用于给其他应用调用小米便签的内容的共享数据
+    private NoteData mNoteData;//申明一个NoteData变量，用来记录note的一些基本信息
+    private static final String TAG = "Note";//软件的名称
+    /**
+     * Create a new note id for adding a new note to databases//创建一个新的便签id，以便把新便签加入数据库
+     */
+    public static synchronized long getNewNoteId(Context context, long folderId) {//获取新建便签的编号
+        // Create a new note in the database
+        ContentValues values = new ContentValues();//在数据库中新建一个便签文件
+        long createdTime = System.currentTimeMillis();//读取当前系统时间
+        values.put(NoteColumns.CREATED_DATE, createdTime);//将创建时间和修改时间都更改为当前系统时间
+        values.put(NoteColumns.MODIFIED_DATE, createdTime);//更改时间
+        values.put(NoteColumns.TYPE, Notes.TYPE_NOTE);//便签类型
+        values.put(NoteColumns.LOCAL_MODIFIED, 1);//修改标志置为1
+        values.put(NoteColumns.PARENT_ID, folderId);//将数据写入数据库表格
+        Uri uri = context.getContentResolver().insert(Notes.CONTENT_NOTE_URI, values);//外部应用对ContentProvider中的数据进行添加、删除、修改和查询操作
+
+        long noteId = 0;//实现外部应用对数据的插入删除等操作
+        try {//异常处理
+            noteId = Long.valueOf(uri.getPathSegments().get(1));//获取便签的id
+        } catch (NumberFormatException e) {//异常处理和提示
+            Log.e(TAG, "Get note id error :" + e.toString());//获取id错误
+            noteId = 0;//获取了错误的id
+        }
+        if (noteId == -1) {//块：错误ID，异常处理
+            throw new IllegalStateException("Wrong note id:" + noteId);//非法状态时返回出错便签编号
+        }
+        return noteId;//若没有异常，那么返回这个id
+    }
+
+    public Note() {//定义两个变量用来存储便签的数据，一个是存储便签属性、一个是存储便签内容
+        mNoteDiffValues = new ContentValues();//便签属性
+        mNoteData = new NoteData();//便签内容
+    }
+
+    public void setNoteValue(String key, String value) {//设置数据库表格的标签属性数据
+        mNoteDiffValues.put(key, value);//设置key值和对应的value值
+        mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);//修改之后标志为1
+        mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());//更新修改时间为当前系统时间
+    }
+
+    public void setTextData(String key, String value) {
+        mNoteData.setTextData(key, value);
+    }//设置数据库表格的标签文本内容的数据
+
+    public void setTextDataId(long id) {
+        mNoteData.setTextDataId(id);
+    }//设置文本数据的ID
+
+    public long getTextDataId() {
+        return mNoteData.mTextDataId;
+    }//获取文本数据的id
+
+    public void setCallDataId(long id) {
+        mNoteData.setCallDataId(id);
+    }//设置电话号码数据的ID
+
+    public void setCallData(String key, String value) {
+        mNoteData.setCallData(key, value);
+    }//得到电话号码数据的ID
+
+    public boolean isLocalModified() {//判断是否是本地修改
+        return mNoteDiffValues.size() > 0 || mNoteData.isLocalModified();//相较上次存在修改size()>0
+    }
+
+    public boolean syncNote(Context context, long noteId) {//判断便签是否同步
+        if (noteId <= 0) {//便签ID不合法时抛出异常
+            throw new IllegalArgumentException("Wrong note id:" + noteId);//抛出异常，弹出对话框错误ID并显示错误ID号
+        }
+
+        if (!isLocalModified()) {//如果本地没有发现修改，直接返回1，指示已经同步到数据库中
+            return true;//返回true
+        }
+
+        /**
+         * In theory, once data changed, the note should be updated on {@link NoteColumns#LOCAL_MODIFIED} and
+         * {@link NoteColumns#MODIFIED_DATE}. For data safety, though update note fails, we also update the
+         * note data info
+         */
+        if (context.getContentResolver().update(//发现更新错误时，及时反馈错误信息
+                ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), mNoteDiffValues, null,
+                null) == 0) {
+            Log.e(TAG, "Update note error, should not happen");//更新失败
+            // Do not return, fall through
+        }
+        mNoteDiffValues.clear();//初始化便签特征值
+
+        if (mNoteData.isLocalModified()//判断未同步
+                && (mNoteData.pushIntoContentResolver(context, noteId) == null)) {//如果向内容接收者推送上下文失败，则返回错误
+            return false;//否则已经同步成功
+        }
+
+        return true;//成功则返回true
+    }
+
+    private class NoteData {//定义一个基本的便签内容的数据类，主要包含文本数据和电话号码数据
+        private long mTextDataId;//文本数据id
+
+        private ContentValues mTextDataValues;//文本数据内容
+
+        private long mCallDataId;//电话号码数据ID
+
+        private ContentValues mCallDataValues;//电话号码数据内容
+
+        private static final String TAG = "NoteData";//初始化
+
+        public NoteData() {// NoteData的构造函数，初始化四个变量
+            mTextDataValues = new ContentValues();//初始化一个文本数据，为了储存文本
+            mCallDataValues = new ContentValues();//初始化一个电话号码数据，为了储存电话号码
+            mTextDataId = 0;//初始化文本数据ID，置为0
+            mCallDataId = 0;//初始化电话号码ID，置为0
+        }
+
+        boolean isLocalModified() {//下面是上述几个函数的具体实现
+            return mTextDataValues.size() > 0 || mCallDataValues.size() > 0;
+        }
+
+        void setTextDataId(long id) {//设定文本数据id
+            if(id <= 0) {// id不能小于0
+                throw new IllegalArgumentException("Text data id should larger than 0");//id保证大于0
+            }
+            mTextDataId = id;//设定电话号码id
+        }
+
+        void setCallDataId(long id) {//设置电话号码对应的id
+            if (id <= 0) {//判断ID是否合法
+                throw new IllegalArgumentException("Call data id should larger than 0");//电话号码数据ID应大于0
+            }
+            mCallDataId = id;//设定电话数据
+        }
+
+        void setCallData(String key, String value) {//设置电话号码数据内容，并且保存修改时间
+            mCallDataValues.put(key, value);//修改之后，将属性值置为1
+            mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);//系统修改时间
+            mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());//设置修改时间为当前系统时间
+        }
+
+        void setTextData(String key, String value) {//设置文本数据
+            mTextDataValues.put(key, value);//修改后标志置为1
+            mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);//设置修改时间为当前系统时间
+            mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());//设置修改时间为当前系统时间
+        }
+
+        Uri pushIntoContentResolver(Context context, long noteId) {//下面函数的作用是将新的数据通过Uri的操作存储到数据库
+            /**
+             * Check for safety
+             */
+            if (noteId <= 0) {//保证便器的编号为正数
+                throw new IllegalArgumentException("Wrong note id:" + noteId);//判断数据是否合法
+            }
+
+            ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();//数据库操作链表
+            ContentProviderOperation.Builder builder = null;//数据库的操作列表
+
+            if(mTextDataValues.size() > 0) {//把文本数据存入DataColumns
+                mTextDataValues.put(DataColumns.NOTE_ID, noteId);//设定文本数据的属性
+                if (mTextDataId == 0) {//uri插入文本数据
+                    mTextDataValues.put(DataColumns.MIME_TYPE, TextNote.CONTENT_ITEM_TYPE);//把文本便签的类型填入文本数据库中的对应一行
+                    Uri uri = context.getContentResolver().insert(Notes.CONTENT_DATA_URI,//uri内容接收器插入文本数据库，放在Notes.CONTENT_DATA_URI的路径下
+                            mTextDataValues);
+                    try {//尝试重新给它设置id
+                        setTextDataId(Long.valueOf(uri.getPathSegments().get(1)));
+                    } catch (NumberFormatException e) {
+                        Log.e(TAG, "Insert new text data fail with noteId" + noteId);//插入数据失败
+                        mTextDataValues.clear();//把电话号码数据存入DataColumns
+                        return null;
+                    }
+                } else {
+                    builder = ContentProviderOperation.newUpdate(ContentUris.withAppendedId(//内容提供者的更新操作，因为这个uri对应的数据是已经存在的，所以不需要向上面一样新建，而是更新即可
+                            Notes.CONTENT_DATA_URI, mTextDataId));//语句： 将uri和id合并后，更新
+                    builder.withValues(mTextDataValues);
+                    operationList.add(builder.build());//操作队列添加上内容提供者
+                }
+                mTextDataValues.clear();//设定电话号码的属性数据
+            }
+
+            if(mCallDataValues.size() > 0) {//对于电话号码的数据也是和文本数据一样的同步处理
+                mCallDataValues.put(DataColumns.NOTE_ID, noteId);//写入noteID
+                if (mCallDataId == 0) {//将电话号码的id设定为uri提供的id
+                    mCallDataValues.put(DataColumns.MIME_TYPE, CallNote.CONTENT_ITEM_TYPE);
+                    Uri uri = context.getContentResolver().insert(Notes.CONTENT_DATA_URI,
+                            mCallDataValues);
+                    try {//异常处理
+                        setCallDataId(Long.valueOf(uri.getPathSegments().get(1)));
+                    } catch (NumberFormatException e) {
+                        Log.e(TAG, "Insert new call data fail with noteId" + noteId);//插入电话号码数据失败
+                        mCallDataValues.clear();
+                        return null;
+                    }
+                } else {//当电话号码不为新建时，更新电话号码ID
+                    builder = ContentProviderOperation.newUpdate(ContentUris.withAppendedId(//内容提供者的更新操作，这个uri对应的数据是已经存在的，因此进行更新即可
+                            Notes.CONTENT_DATA_URI, mCallDataId));
+                    builder.withValues(mCallDataValues);
+                    operationList.add(builder.build());//存储过程中的异常处理
+                }
+                mCallDataValues.clear();
+            }
+
+            if (operationList.size() > 0) {//存储过程中如果遇到异常，通过如下进行处理
+                try {//抛出远程异常，并写回日志
+                    ContentProviderResult[] results = context.getContentResolver().applyBatch(//Android源码中对通讯录的操作，应用端使用ContentProvider提供的applyBatch，进行批量处理通讯录的联系人入库
+                            Notes.AUTHORITY, operationList);
+                    return (results == null || results.length == 0 || results[0] == null) ? null//完成后返回一个URI
+                            : ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId);
+                } catch (RemoteException e) {//捕捉操作异常并写回日志
+                    Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));//异常日志
+                    return null;
+                } catch (OperationApplicationException e) {
+                    Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));//异常日志
+                    return null;
+                }
+            }
+            return null;
+        }
+    }
+}

doc/精读报告/model/WorkingNote.doc

@@ -0,0 +1,368 @@
+/*//当前活动便签项
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.model;//在model包中
+
+import android.appwidget.AppWidgetManager;//需要调用的其他类
+import android.content.ContentUris;
+import android.content.Context;
+import android.database.Cursor;//游标的使用
+import android.text.TextUtils;
+import android.util.Log;
+
+import net.micode.notes.data.Notes;//小米便签操作的整体属性
+import net.micode.notes.data.Notes.CallNote;
+import net.micode.notes.data.Notes.DataColumns;
+import net.micode.notes.data.Notes.DataConstants;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.data.Notes.TextNote;
+import net.micode.notes.tool.ResourceParser.NoteBgResources;
+
+
+public class WorkingNote {//声明一个workingnote类
+    // Note for the working note
+    private Note mNote;//声明一个Note类型的变量
+    // Note Id
+    private long mNoteId;//声明便签content
+    // Note content
+    private String mContent;//声明便签mode
+    // Note mode
+    private int mMode;//是否是清单模式
+
+    private long mAlertDate;//设置闹钟时间
+
+    private long mModifiedDate;// 最后修改时间
+
+    private int mBgColorId;//背景颜色ID
+
+    private int mWidgetId;//控件ID
+
+    private int mWidgetType;//桌面挂件的格式
+
+    private long mFolderId;//便签文件夹ID
+
+    private Context mContext;//当前便签的上下文
+
+    private static final String TAG = "WorkingNote";//声明 DATA_PROJECTION字符串数组
+
+    private boolean mIsDeleted;//是否应该被删除
+
+    private NoteSettingChangedListener mNoteSettingStatusListener;//一个用来监听设置是否有变化的接口
+
+    public static final String[] DATA_PROJECTION = new String[] {//声明 NOTE_PROJECTION字符串数组
+            DataColumns.ID,
+            DataColumns.CONTENT,
+            DataColumns.MIME_TYPE,
+            DataColumns.DATA1,
+            DataColumns.DATA2,
+            DataColumns.DATA3,
+            DataColumns.DATA4,
+    };
+
+    public static final String[] NOTE_PROJECTION = new String[] {//保存便签自身属性的字符串数组
+            NoteColumns.PARENT_ID,
+            NoteColumns.ALERTED_DATE,
+            NoteColumns.BG_COLOR_ID,
+            NoteColumns.WIDGET_ID,
+            NoteColumns.WIDGET_TYPE,
+            NoteColumns.MODIFIED_DATE
+    };
+
+    private static final int DATA_ID_COLUMN = 0;//规定每一个数据类型在哪一行
+
+    private static final int DATA_CONTENT_COLUMN = 1;
+
+    private static final int DATA_MIME_TYPE_COLUMN = 2;
+
+    private static final int DATA_MODE_COLUMN = 3;
+
+    private static final int NOTE_PARENT_ID_COLUMN = 0;//以下6个常量表示便签投影的0-5列
+
+    private static final int NOTE_ALERTED_DATE_COLUMN = 1;
+
+    private static final int NOTE_BG_COLOR_ID_COLUMN = 2;
+
+    private static final int NOTE_WIDGET_ID_COLUMN = 3;
+
+    private static final int NOTE_WIDGET_TYPE_COLUMN = 4;
+
+    private static final int NOTE_MODIFIED_DATE_COLUMN = 5;
+
+    // New note construct
+    private WorkingNote(Context context, long folderId) {//该方法初始化类里的各项变量
+        mContext = context;//WorkingNote的构造函数
+        mAlertDate = 0;//默认提醒日期为0
+        mModifiedDate = System.currentTimeMillis();//系统现在的时间,时间的表达格式为当前计算机时间和GMT时间(格林威治时间)1970年1月1号0时0分0秒所差的毫秒数
+        mFolderId = folderId;//默认最后一次修改日期为当前时间
+        mNote = new Note();//加载一个已存在的便签
+        mNoteId = 0;//没有提供id所以默认为0
+        mIsDeleted = false;
+        mMode = 0;
+        mWidgetType = Notes.TYPE_WIDGET_INVALIDE;//默认是不可见
+    }
+
+    // Existing note construct
+    private WorkingNote(Context context, long noteId, long folderId) {//加载Note
+        mContext = context;//调用query函数找到第一个条目
+        mNoteId = noteId;
+        mFolderId = folderId;
+        mIsDeleted = false;
+        mNote = new Note();
+        loadNote();//加载便签
+    }
+
+    private void loadNote() {//加载已有的便签
+        Cursor cursor = mContext.getContentResolver().query(//存在第一个条目
+                ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, mNoteId), NOTE_PROJECTION, null,
+                null, null);
+
+        if (cursor != null) {//通过数据库调用query函数找到第一个条目
+            if (cursor.moveToFirst()) {//如果游标移动到第一行
+                mFolderId = cursor.getLong(NOTE_PARENT_ID_COLUMN);//存储各项信息
+                mBgColorId = cursor.getInt(NOTE_BG_COLOR_ID_COLUMN);//关闭cursor游标
+                mWidgetId = cursor.getInt(NOTE_WIDGET_ID_COLUMN);
+                mWidgetType = cursor.getInt(NOTE_WIDGET_TYPE_COLUMN);
+                mAlertDate = cursor.getLong(NOTE_ALERTED_DATE_COLUMN);
+                mModifiedDate = cursor.getLong(NOTE_MODIFIED_DATE_COLUMN);
+            }
+            cursor.close();//若不存在，报错
+        } else {//否则说明不存在这个便签，加载错误
+            Log.e(TAG, "No note with id:" + mNoteId);//未能找到此note,返回异常
+            throw new IllegalArgumentException("Unable to find note with id " + mNoteId);//抛出异常，找不到NoteID
+        }
+        loadNoteData();//调用方法loadNoteData，导入便签的内容。
+    }
+
+    private void loadNoteData() {//加载NoteData
+        Cursor cursor = mContext.getContentResolver().query(Notes.CONTENT_DATA_URI, DATA_PROJECTION,
+                DataColumns.NOTE_ID + "=?", new String[] {
+                    String.valueOf(mNoteId)
+                }, null);//判断信息是否为空
+
+        if (cursor != null) {//光标存在时，将光标移动到便签的起始位置
+            if (cursor.moveToFirst()) {//do while循环将便签数据全部读取出来
+                do {
+                    String type = cursor.getString(DATA_MIME_TYPE_COLUMN);//获取存储内容的类型
+                    if (DataConstants.NOTE.equals(type)) {//数据类型为文本类型时，存为文本
+                        mContent = cursor.getString(DATA_CONTENT_COLUMN);//如果是便签文本类型，那么加载到相应的里面保存
+                        mMode = cursor.getInt(DATA_MODE_COLUMN);
+                        mNote.setTextDataId(cursor.getLong(DATA_ID_COLUMN));
+                    } else if (DataConstants.CALL_NOTE.equals(type)) {//为电话号码类信息时 存为电话号码
+                        mNote.setCallDataId(cursor.getLong(DATA_ID_COLUMN));//否则，在日志中标志错误类型为note type错误
+                    } else {//如果类型错误，则提示异常
+                        Log.d(TAG, "Wrong note type with type:" + type);//再否则就是有错误
+                    }
+                } while (cursor.moveToNext());//查阅所有项,直到为空
+            }
+            cursor.close();//查找失败时，在日志中记录错误信息为无法找到id号为mNoteId的便签
+        } else {//否则记录异常日志，没有ID为mNoteId的数据
+            Log.e(TAG, "No data with id:" + mNoteId);//否则记录异常日志，没有ID为mNoteId的数据
+            throw new IllegalArgumentException("Unable to find note's data with id " + mNoteId);//抛出异常
+        }
+    }
+
+    public static WorkingNote createEmptyNote(Context context, long folderId, int widgetId,//创建一个新便签的构造函数
+            int widgetType, int defaultBgColorId) {
+        WorkingNote note = new WorkingNote(context, folderId);//根据环境和id创建一个空的便签
+        note.setBgColorId(defaultBgColorId);//设定相关属性
+        note.setWidgetId(widgetId);//设定widget id
+        note.setWidgetType(widgetType);//设置窗口类型
+        return note;
+    }
+
+    public static WorkingNote load(Context context, long id) {//导入一个新的正在写入的便签（WorkingNote）
+        return new WorkingNote(context, id, 0);//返回便签
+    }
+
+    public synchronized boolean saveNote() {//保存Note
+        if (isWorthSaving()) {//是否值得保存
+            if (!existInDatabase()) {//是否存在数据库
+                if ((mNoteId = Note.getNewNoteId(mContext, mFolderId)) == 0) {//没有成功创建一个便签时，返回出错日志
+                    Log.e(TAG, "Create new note fail with id:" + mNoteId);
+                    return false;
+                }
+            }
+
+            mNote.syncNote(mContext, mNoteId);//同步便签内容及便签id
+
+            /**
+             * Update widget content if there exist any widget of this note
+             */
+            if (mWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID//判断是否存在widget可以上传
+                    && mWidgetType != Notes.TYPE_WIDGET_INVALIDE
+                    && mNoteSettingStatusListener != null) {
+                mNoteSettingStatusListener.onWidgetChanged();
+            }
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    public boolean existInDatabase() {
+        return mNoteId > 0;
+    }//是否在数据库中存在判断是否在数据库中存储过，直接判定id大小即可
+
+    private boolean isWorthSaving() {//判断是否需要保存
+        if (mIsDeleted || (!existInDatabase() && TextUtils.isEmpty(mContent))//被删除，或（不在数据库中 内容为空），或 本地已保存过
+                || (existInDatabase() && !mNote.isLocalModified())) {
+            return false;
+        } else {
+            return true;//其余情况，要保存，返回true
+        }
+    }
+
+    public void setOnSettingStatusChangedListener(NoteSettingChangedListener l) {//设置常量
+        mNoteSettingStatusListener = l;
+    }
+
+    public void setAlertDate(long date, boolean set) {//设置AlertDate;若 mAlertDate与data不同，则更改mAlertDate并设定NoteValue
+        if (date != mAlertDate) {//发现date与mAlertDate不一致时，设置mAlertDate为date
+            mAlertDate = date;//为设置的日期打标签
+            mNote.setNoteValue(NoteColumns.ALERTED_DATE, String.valueOf(mAlertDate));
+        }
+        if (mNoteSettingStatusListener != null) {//判断是否为空
+            mNoteSettingStatusListener.onClockAlertChanged(date, set);
+        }
+    }
+
+    public void markDeleted(boolean mark) {//设定删除标记
+        mIsDeleted = mark;//设定标记
+        if (mWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID
+                && mWidgetType != Notes.TYPE_WIDGET_INVALIDE && mNoteSettingStatusListener != null) {//调用mNoteSettingStatusListener的 onWidgetChanged方法
+                mNoteSettingStatusListener.onWidgetChanged();
+        }
+    }
+
+    public void setBgColorId(int id) {//设定背景颜色
+        if (id != mBgColorId) {//判断
+            mBgColorId = id;//设置背景颜色
+            if (mNoteSettingStatusListener != null) {
+                mNoteSettingStatusListener.onBackgroundColorChanged();
+            }
+            mNote.setNoteValue(NoteColumns.BG_COLOR_ID, String.valueOf(id));
+        }
+    }
+
+    public void setCheckListMode(int mode) {//设定检查列表模式
+        if (mMode != mode) {//设定一个判断条件
+            if (mNoteSettingStatusListener != null) {
+                mNoteSettingStatusListener.onCheckListModeChanged(mMode, mode);//设定之后更改mMode
+            }
+            mMode = mode;//把当前便签蛇者为清单模式的便签
+            mNote.setTextData(TextNote.MODE, String.valueOf(mMode));//语句：重设文本数据，改变MODE项
+        }
+    }
+
+    public void setWidgetType(int type) {//设定WidgetType
+        if (type != mWidgetType) {//设定条件
+            mWidgetType = type;//调用Note的setNoteValue方法更改WidgetType
+            mNote.setNoteValue(NoteColumns.WIDGET_TYPE, String.valueOf(mWidgetType));
+        }//调用Note的setNoteValue方法更改WidgetType
+    }
+
+    public void setWidgetId(int id) {//设定WidgetId
+        if (id != mWidgetId) {//设定条件
+            mWidgetId = id;//调用Note的setNoteValue方法更改WidgetId
+            mNote.setNoteValue(NoteColumns.WIDGET_ID, String.valueOf(mWidgetId));
+        }//调用Note的setNoteValue方法更改WidgetId
+    }
+
+    public void setWorkingText(String text) {//设定WorkingText
+        if (!TextUtils.equals(mContent, text)) {//判断条件
+            mContent = text;//调用Note的setTextData方法更改WorkingText
+            mNote.setTextData(DataColumns.CONTENT, mContent);//调用Note的setTextData方法更改WorkingText
+        }
+    }
+
+    public void convertToCallNote(String phoneNumber, long callDate) {//转变mNote的CallData及CallNote信息
+        mNote.setCallData(CallNote.CALL_DATE, String.valueOf(callDate));
+        mNote.setCallData(CallNote.PHONE_NUMBER, phoneNumber);
+        mNote.setNoteValue(NoteColumns.PARENT_ID, String.valueOf(Notes.ID_CALL_RECORD_FOLDER));
+    }
+
+    public boolean hasClockAlert() {
+        return (mAlertDate > 0 ? true : false);
+    }//判断是否有时钟提醒
+
+    public String getContent() {
+        return mContent;
+    }//获取内容
+
+    public long getAlertDate() {
+        return mAlertDate;
+    }//获取闹钟警戒数据
+
+    public long getModifiedDate() {
+        return mModifiedDate;
+    }//获取修改的数据
+
+    public int getBgColorResId() {
+        return NoteBgResources.getNoteBgResource(mBgColorId);
+    }//获取背景颜色id
+
+    public int getBgColorId() {
+        return mBgColorId;
+    }//获取背景颜色id
+
+    public int getTitleBgResId() {
+        return NoteBgResources.getNoteTitleBgResource(mBgColorId);
+    }//获取标题背景颜色id
+
+    public int getCheckListMode() {
+        return mMode;
+    }//获取CheckListMode
+
+    public long getNoteId() {
+        return mNoteId;
+    }//获取便签id
+
+    public long getFolderId() {
+        return mFolderId;
+    }//获取文件夹id
+
+    public int getWidgetId() {
+        return mWidgetId;
+    }//获取WidgetType
+
+    public int getWidgetType() {
+        return mWidgetType;
+    }//创建接口 NoteSettingChangedListener,便签更新监视；为NoteEditActivity提供接口
+
+    public interface NoteSettingChangedListener {//该类用于侦听关于Note的设置的改变
+        /**
+         * Called when the background color of current note has just changed
+         */
+        void onBackgroundColorChanged();//背景颜色改变按钮
+
+        /**
+         * Called when user set clock
+         */
+        void onClockAlertChanged(long date, boolean set);//
+
+        /**
+         * Call when user create note from widget
+         */
+        void onWidgetChanged();//小部件的修改按钮
+
+        /**
+         * Call when switch between check list mode and normal mode
+         * @param oldMode is previous mode before change
+         * @param newMode is new mode
+         */
+        void onCheckListModeChanged(int oldMode, int newMode);//mode的改变按键
+    }
+}

doc/精读报告/ui/AlarmAlertActivity.doc

@@ -0,0 +1,176 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.ui;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnClickListener;
+import android.content.DialogInterface.OnDismissListener;
+import android.content.Intent;
+import android.media.AudioManager;
+import android.media.MediaPlayer;
+import android.media.RingtoneManager;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.PowerManager;
+import android.provider.Settings;
+import android.view.Window;
+import android.view.WindowManager;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes;
+import net.micode.notes.tool.DataUtils;
+
+import java.io.IOException;
+
+
+public class AlarmAlertActivity extends Activity implements OnClickListener, OnDismissListener {
+    //. 继承了Activity类，改类实现了OnClickListener和 OnDismissListener两个接口，OnClickListener接口用来监听点击事件，OnDismissListener接口用来监听关闭对话框事件
+    private long mNoteId;//文本在数据库中的ID号
+    private String mSnippet;//闹钟提示时显示的文本
+    private static final int SNIPPET_PREW_MAX_LEN = 60;//文本最大长度
+    MediaPlayer mPlayer;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);//Bundle类型的数据与Map类型的数据相似，都是以key-value的形式存储数据的
+        //onsaveInstanceState方法是用来保存Activity的状态的
+        //能从onCreate的参数savedInsanceState中获得状态数据
+        requestWindowFeature(Window.FEATURE_NO_TITLE);//界面显示无标题
+
+        final Window win = getWindow();
+        win.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
+
+        if (!isScreenOn()) {
+            win.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
+                    //保持屏幕亮屏
+                    | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON
+                    //唤醒屏幕
+                    | WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON
+                    //允许亮屏时锁屏
+                    | WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR);
+        }//手机息屏后若闹钟铃响则亮屏
+
+        Intent intent = getIntent();
+
+        try {
+            mNoteId = Long.valueOf(intent.getData().getPathSegments().get(1));
+            mSnippet = DataUtils.getSnippetById(this.getContentResolver(), mNoteId);
+            //根据ID从数据库中获取标签的内容
+            //getContentResolver（）是实现数据共享，实例存储
+            mSnippet = mSnippet.length() > SNIPPET_PREW_MAX_LEN ? mSnippet.substring(0,
+                    SNIPPET_PREW_MAX_LEN) + getResources().getString(R.string.notelist_string_info)
+                    : mSnippet;//判断标签片段是否达到符合长度
+        } catch (IllegalArgumentException e) {
+            e.printStackTrace();
+            return;
+        }
+
+        mPlayer = new MediaPlayer();
+        if (DataUtils.visibleInNoteDatabase(getContentResolver(), mNoteId, Notes.TYPE_NOTE)) {
+            showActionDialog();//弹出对话框
+            playAlarmSound();//闹钟发出提示音
+        } else {
+            finish();//完成闹钟动作
+        }
+    }
+
+    private boolean isScreenOn() {
+        //判断屏幕是否锁屏，调用系统函数判断，最后返回值是布尔类型
+        PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
+        return pm.isScreenOn();
+    }
+
+    private void playAlarmSound() {
+        //闹钟发出提示音
+        Uri url = RingtoneManager.getActualDefaultRingtoneUri(this, RingtoneManager.TYPE_ALARM);
+        //调用系统的铃声管理URI，得到闹钟提示音
+        int silentModeStreams = Settings.System.getInt(getContentResolver(),
+                Settings.System.MODE_RINGER_STREAMS_AFFECTED, 0);
+
+        if ((silentModeStreams & (1 << AudioManager.STREAM_ALARM)) != 0) {
+            mPlayer.setAudioStreamType(silentModeStreams);
+        } else {
+            mPlayer.setAudioStreamType(AudioManager.STREAM_ALARM);
+        }
+        try {
+            mPlayer.setDataSource(this, url);
+            //根据Uri设置多媒体数据来源
+            mPlayer.prepare();//播放器准备
+            mPlayer.setLooping(true);//设置循环播放
+            mPlayer.start();//开始播放
+
+        } catch (IllegalArgumentException e) {
+            // TODO Auto-generated catch block
+            e.printStackTrace();//e.printStackTrace()函数功能是抛出异常， 还将显示出更深的调用信息
+        } catch (SecurityException e) {
+            // TODO Auto-generated catch block
+            e.printStackTrace();
+        } catch (IllegalStateException e) {
+            // TODO Auto-generated catch block
+            e.printStackTrace();
+        } catch (IOException e) {
+            // TODO Auto-generated catch block
+            e.printStackTrace();
+        }
+    }
+
+    private void showActionDialog() {
+        AlertDialog.Builder dialog = new AlertDialog.Builder(this);
+        //AlertDialog的构造方法全部是Protected的
+        //所以不能直接通过new一个AlertDialog来创建出一个AlertDialog。
+        //要创建一个AlertDialog，就要用到AlertDialog.Builder中的create()方法
+        //如这里的dialog就是新建了一个AlertDialog
+        dialog.setTitle(R.string.app_name);//为对话框设置标题
+        dialog.setMessage(mSnippet);//为对话框设置内容
+        dialog.setPositiveButton(R.string.notealert_ok, this);//给对话框添加"Yes"按钮
+        if (isScreenOn()) {
+            dialog.setNegativeButton(R.string.notealert_enter, this);
+        }//对话框添加"No"按钮
+        dialog.show().setOnDismissListener(this);
+    }
+
+    public void onClick(DialogInterface dialog, int which) {
+        switch (which) {
+            //用which来选择click后下一步的操作
+            case DialogInterface.BUTTON_NEGATIVE://这是取消操作
+                Intent intent = new Intent(this, NoteEditActivity.class);//实现两个类间的数据传输
+                intent.setAction(Intent.ACTION_VIEW);//设置动作属性
+                intent.putExtra(Intent.EXTRA_UID, mNoteId);//实现key-value对
+                //EXTRA_UID为key；mNoteId为键
+                startActivity(intent);//开始动作
+                break;
+            default://这是确定操作
+                break;
+        }
+    }
+
+    public void onDismiss(DialogInterface dialog) {//忽略
+        stopAlarmSound();//停止闹钟声音
+        finish();//完成该动作
+    }
+
+    private void stopAlarmSound() {
+        if (mPlayer != null) {
+            mPlayer.stop();//停止播放
+            mPlayer.release();//释放MediaPlayer对象
+            mPlayer = null;
+        }
+    }
+}

doc/精读报告/ui/AlarmInitReceiver.doc

@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.ui;
+
+import android.app.AlarmManager;
+import android.app.PendingIntent;
+import android.content.BroadcastReceiver;
+import android.content.ContentUris;
+import android.content.Context;
+import android.content.Intent;
+import android.database.Cursor;
+
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.NoteColumns;
+
+
+public class AlarmInitReceiver extends BroadcastReceiver {
+
+    private static final String [] PROJECTION = new String [] {
+        NoteColumns.ID,
+        NoteColumns.ALERTED_DATE
+    };
+    //对数据库的操作，调用标签ID和闹钟时间
+    private static final int COLUMN_ID                = 0;
+    private static final int COLUMN_ALERTED_DATE      = 1;
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        long currentDate = System.currentTimeMillis();//System.currentTimeMillis()产生一个当前的毫秒
+        Cursor c = context.getContentResolver().query(Notes.CONTENT_NOTE_URI,
+                PROJECTION,
+                NoteColumns.ALERTED_DATE + ">? AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE,
+                new String[] { String.valueOf(currentDate) },//将long变量currentDate转化为字符串
+                null);
+//Cursor在这里的作用是通过查找数据库中的标签内容，找到和当前系统时间相等的标签
+        if (c != null) {//当c != null的时候，将cursor移动到开始处，然后执行相关对信息的读取工作，直至读取结束，然后关闭该cursor
+            if (c.moveToFirst()) {//游标移动到开始位置
+                do {
+                    long alertDate = c.getLong(COLUMN_ALERTED_DATE);//获取便签的提醒时间
+                    Intent sender = new Intent(context, AlarmReceiver.class);//新建一个intent类 来指向alarmreceiver 来传输数据
+                    sender.setData(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, c.getLong(COLUMN_ID)));//设置数据为便签的uri和id
+                    PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, sender, 0);
+                    //使用了PendingIntent方法，得到可以延时向之前定义的Intent sender发送广播的PendingIntent实例Pendingintent
+                    AlarmManager alermManager = (AlarmManager) context//新建系统的闹钟服务
+                            .getSystemService(Context.ALARM_SERVICE);
+                    alermManager.set(AlarmManager.RTC_WAKEUP, alertDate, pendingIntent);
+                    //调用android系统方法AlarmManager,设置一个系统提醒事项，设置提醒时间为当前便签中所存alertdate，并设置激活提醒时,广播类Pendingintent
+                } while (c.moveToNext());//游标移动到下一位置
+            }
+            c.close();//关闭游标
+        }
+    }
+}

doc/精读报告/ui/AlarmReceiver.doc

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.ui;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+
+public class AlarmReceiver extends BroadcastReceiver {
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        intent.setClass(context, AlarmAlertActivity.class);//启动AlarmAlertActivity
+        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        //属性设置启动Activity模式：在任务栈中会判断是否存在相同的activity，如果存在，那么会清除该activity之上的其他activity对象显示，如果不存在，则会创建一个新的activity放入栈顶
+        context.startActivity(intent);//使用intent启动activity
+    }
+}

doc/精读报告/ui/DateTimePicker.doc

@@ -0,0 +1,496 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.ui;
+
+import java.text.DateFormatSymbols;
+import java.util.Calendar;
+
+import net.micode.notes.R;
+
+
+import android.content.Context;
+import android.text.format.DateFormat;
+import android.view.View;
+import android.widget.FrameLayout;
+import android.widget.NumberPicker;
+
+public class DateTimePicker extends FrameLayout {
+    //FrameLayout是布局模板之一
+    //所有的子元素全部在屏幕的右上方
+    private static final boolean DEFAULT_ENABLE_STATE = true;
+
+    private static final int HOURS_IN_HALF_DAY = 12;//定义半天为12小时
+    private static final int HOURS_IN_ALL_DAY = 24;//定义一天为24小时
+    private static final int DAYS_IN_ALL_WEEK = 7;//定义一周为七天
+    private static final int DATE_SPINNER_MIN_VAL = 0;//定义日期循环最小值为0
+    private static final int DATE_SPINNER_MAX_VAL = DAYS_IN_ALL_WEEK - 1;//一周循环最大天数为一周天数减1天
+    private static final int HOUR_SPINNER_MIN_VAL_24_HOUR_VIEW = 0;//24小时制小时最小值为0
+    private static final int HOUR_SPINNER_MAX_VAL_24_HOUR_VIEW = 23;//定义24小时循环的最大值为23
+    private static final int HOUR_SPINNER_MIN_VAL_12_HOUR_VIEW = 1;// 12小时制下小时转轮最小值
+    private static final int HOUR_SPINNER_MAX_VAL_12_HOUR_VIEW = 12;// 12小时制下小时转轮最大值
+    private static final int MINUT_SPINNER_MIN_VAL = 0;//分钟轮转最小值为0
+    private static final int MINUT_SPINNER_MAX_VAL = 59;//分钟轮转最大值为59
+    private static final int AMPM_SPINNER_MIN_VAL = 0;//标志上下午的轮转值，没有具体意义
+    private static final int AMPM_SPINNER_MAX_VAL = 1;//标志上下午的轮转值，没有具体意义
+    //初始化控件
+    private final NumberPicker mDateSpinner;
+    private final NumberPicker mHourSpinner;
+    private final NumberPicker mMinuteSpinner;
+    private final NumberPicker mAmPmSpinner;
+    //NumberPicker是数字选择器
+    //这里定义的四个变量全部是在设置闹钟时需要选择的变量（如日期、时、分、上午或者下午）
+    private Calendar mDate;
+    //定义了Calendar类型的变量mDate，用于操作时间
+
+    private String[] mDateDisplayValues = new String[DAYS_IN_ALL_WEEK];
+
+    private boolean mIsAm;
+
+    private boolean mIs24HourView;
+
+    private boolean mIsEnabled = DEFAULT_ENABLE_STATE;
+
+    private boolean mInitialising;
+
+    private OnDateTimeChangedListener mOnDateTimeChangedListener;
+
+    private NumberPicker.OnValueChangeListener mOnDateChangedListener = new NumberPicker.OnValueChangeListener() {
+        @Override
+        public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
+            mDate.add(Calendar.DAY_OF_YEAR, newVal - oldVal);
+            updateDateControl();
+            onDateTimeChanged();
+        }
+    };//OnValueChangeListener，这是时间改变监听器，这里主要是对日期的监听
+    //将现在日期的值传递给mDate；updateDateControl是同步操作
+
+    private NumberPicker.OnValueChangeListener mOnHourChangedListener = new NumberPicker.OnValueChangeListener() {//这里是对 小时（Hour） 的监听
+        @Override
+        public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
+            boolean isDateChanged = false;
+            Calendar cal = Calendar.getInstance();//声明一个Calendar的变量cal，便于后续的操作
+            if (!mIs24HourView) {
+                if (!mIsAm && oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY) {
+                    cal.setTimeInMillis(mDate.getTimeInMillis());
+                    cal.add(Calendar.DAY_OF_YEAR, 1);
+                    isDateChanged = true;//这里是对于12小时制时，晚上11点和12点交替时对日期的更改
+                } else if (mIsAm && oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) {
+                    cal.setTimeInMillis(mDate.getTimeInMillis());
+                    cal.add(Calendar.DAY_OF_YEAR, -1);
+                    isDateChanged = true;//这里是对于12小时制时，凌晨11点和12点交替时对日期的更改
+                }
+                if (oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY ||
+                        oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) {
+                    mIsAm = !mIsAm;
+                    updateAmPmControl();//这里是对于12小时制时，中午11点和12点交替时对AM和PM的更改
+                }
+            } else {
+                if (oldVal == HOURS_IN_ALL_DAY - 1 && newVal == 0) {
+                    cal.setTimeInMillis(mDate.getTimeInMillis());
+                    cal.add(Calendar.DAY_OF_YEAR, 1);
+                    isDateChanged = true;//这里是对于24小时制时，晚上11点和12点交替时对日期的更改
+                } else if (oldVal == 0 && newVal == HOURS_IN_ALL_DAY - 1) {
+                    cal.setTimeInMillis(mDate.getTimeInMillis());
+                    cal.add(Calendar.DAY_OF_YEAR, -1);
+                    isDateChanged = true;//这里是对于12小时制时，凌晨11点和12点交替时对日期的更改
+                }
+            }
+            int newHour = mHourSpinner.getValue() % HOURS_IN_HALF_DAY + (mIsAm ? 0 : HOURS_IN_HALF_DAY);//通过数字选择器对newHour的赋值
+            mDate.set(Calendar.HOUR_OF_DAY, newHour);//通过set函数将新的Hour值传给mDate
+
+            onDateTimeChanged();
+            if (isDateChanged) {
+                setCurrentYear(cal.get(Calendar.YEAR));
+                setCurrentMonth(cal.get(Calendar.MONTH));
+                setCurrentDay(cal.get(Calendar.DAY_OF_MONTH));
+            }
+        }
+    };
+
+    private NumberPicker.OnValueChangeListener mOnMinuteChangedListener = new NumberPicker.OnValueChangeListener() {
+        @Override//这里是对 分钟（Minute）改变的监听
+        public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
+            int minValue = mMinuteSpinner.getMinValue();
+            int maxValue = mMinuteSpinner.getMaxValue();
+            int offset = 0;//设置offset，作为小时改变的一个记录数据
+            if (oldVal == maxValue && newVal == minValue) {
+                offset += 1;
+            } else if (oldVal == minValue && newVal == maxValue) {
+                offset -= 1;
+            }//如果原值为59，新值为0，则offset加1
+            //如果原值为0，新值为59，则offset减1
+            if (offset != 0) {
+                mDate.add(Calendar.HOUR_OF_DAY, offset);
+                mHourSpinner.setValue(getCurrentHour());
+                updateDateControl();
+                int newHour = getCurrentHourOfDay();
+                if (newHour >= HOURS_IN_HALF_DAY) {
+                    mIsAm = false;
+                    updateAmPmControl();
+                } else {
+                    mIsAm = true;
+                    updateAmPmControl();
+                }
+            }
+            mDate.set(Calendar.MINUTE, newVal);
+            onDateTimeChanged();
+        }
+    };
+
+    private NumberPicker.OnValueChangeListener mOnAmPmChangedListener = new NumberPicker.OnValueChangeListener() { //对AM和PM的监听
+        @Override
+        public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
+            mIsAm = !mIsAm;
+            if (mIsAm) {
+                mDate.add(Calendar.HOUR_OF_DAY, -HOURS_IN_HALF_DAY);
+            } else {
+                mDate.add(Calendar.HOUR_OF_DAY, HOURS_IN_HALF_DAY);
+            }
+            updateAmPmControl();
+            onDateTimeChanged();
+        }
+    };
+
+    public interface OnDateTimeChangedListener {
+        void onDateTimeChanged(DateTimePicker view, int year, int month,
+                int dayOfMonth, int hourOfDay, int minute);
+    }
+
+    public DateTimePicker(Context context) {
+        this(context, System.currentTimeMillis());
+    }//通过对数据库的访问，获取当前的系统时间
+
+
+    public DateTimePicker(Context context, long date) {//实例化时间日期选择器
+        this(context, date, DateFormat.is24HourFormat(context));
+    }
+
+    public DateTimePicker(Context context, long date, boolean is24HourView) {
+        super(context);//获取系统时间
+        mDate = Calendar.getInstance();
+        mInitialising = true;
+        mIsAm = getCurrentHourOfDay() >= HOURS_IN_HALF_DAY;
+        inflate(context, R.layout.datetime_picker, this);
+        //如果当前Activity里用到别的layout，比如对话框layout
+        //还要设置这个layout上的其他组件的内容，就必须用inflate()方法先将对话框的layout找出来
+        //然后再用findViewById()找到它上面的其它组件
+        mDateSpinner = (NumberPicker) findViewById(R.id.date);
+        mDateSpinner.setMinValue(DATE_SPINNER_MIN_VAL);//设置组件最小值属性日期最小值
+        mDateSpinner.setMaxValue(DATE_SPINNER_MAX_VAL);//设置组件最大值属性为日期最大值
+        mDateSpinner.setOnValueChangedListener(mOnDateChangedListener);
+
+        mHourSpinner = (NumberPicker) findViewById(R.id.hour);//显示设置小时的视图
+        mHourSpinner.setOnValueChangedListener(mOnHourChangedListener);
+        mMinuteSpinner =  (NumberPicker) findViewById(R.id.minute);//显示设置分钟的视图
+        mMinuteSpinner.setMinValue(MINUT_SPINNER_MIN_VAL);//设置组件最小值属性为分钟最小值
+        mMinuteSpinner.setMaxValue(MINUT_SPINNER_MAX_VAL);//设置组件最大值属性为分钟最大值
+        mMinuteSpinner.setOnLongPressUpdateInterval(100);//置监听长按时间间隔为100ms
+        mMinuteSpinner.setOnValueChangedListener(mOnMinuteChangedListener);
+
+        String[] stringsForAmPm = new DateFormatSymbols().getAmPmStrings();//对24小时下的 am 与pm各属性值进行初始化
+        mAmPmSpinner = (NumberPicker) findViewById(R.id.amPm);//显示设置上下午的视图
+        mAmPmSpinner.setMinValue(AMPM_SPINNER_MIN_VAL);//设置组件最小值属性为上下午编码最小值
+        mAmPmSpinner.setMaxValue(AMPM_SPINNER_MAX_VAL);//设置组件最大值属性为上下午编码最大值
+        mAmPmSpinner.setDisplayedValues(stringsForAmPm);//设置显示上下午字符串的值
+        mAmPmSpinner.setOnValueChangedListener(mOnAmPmChangedListener);
+
+        // update controls to initial state将日期的各参数值更新为初始化状态
+        updateDateControl();
+        updateHourControl();
+        updateAmPmControl();
+
+        set24HourView(is24HourView);
+
+        // set to current time设置当前时间
+        setCurrentDate(date);
+
+        setEnabled(isEnabled());
+
+        // set the content descriptions
+        mInitialising = false;//表示初始化已经结束
+    }
+
+    @Override
+    public void setEnabled(boolean enabled) {//将当前监听器的状态设置为开启状态
+        if (mIsEnabled == enabled) {//如果已经在开启状态，则返回
+            return;
+        }
+        super.setEnabled(enabled);//将各部分设置为开启状态
+        mDateSpinner.setEnabled(enabled);
+        mMinuteSpinner.setEnabled(enabled);
+        mHourSpinner.setEnabled(enabled);
+        mAmPmSpinner.setEnabled(enabled);
+        mIsEnabled = enabled;
+    }
+
+    @Override
+    public boolean isEnabled() {
+        return mIsEnabled;
+    }
+
+    /**
+     * Get the current date in millis
+     *
+     * @return the current date in millis
+     */
+    public long getCurrentDateInTimeMillis() {
+        return mDate.getTimeInMillis();
+    }//实现函数——得到当前的秒数
+
+    /**
+     * Set the current date
+     *
+     * @param date The current date in millis
+     */
+    public void setCurrentDate(long date) {
+        Calendar cal = Calendar.getInstance();
+        cal.setTimeInMillis(date);
+        setCurrentDate(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH),
+                cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE));//实现函数功能——设置当前的时间，参数是date
+    }
+
+    /**
+     * Set the current date
+     *
+     * @param year The current year
+     * @param month The current month
+     * @param dayOfMonth The current dayOfMonth
+     * @param hourOfDay The current hourOfDay
+     * @param minute The current minute
+     */
+    public void setCurrentDate(int year, int month,
+            int dayOfMonth, int hourOfDay, int minute) {
+        setCurrentYear(year);
+        setCurrentMonth(month);
+        setCurrentDay(dayOfMonth);
+        setCurrentHour(hourOfDay);
+        setCurrentMinute(minute);
+    }//实现函数功能——设置当前的时间，参数是各详细的变量
+
+    /**
+     * Get current year
+     *
+     * @return The current year
+     */
+    //下面是得到year、month、day等值
+    public int getCurrentYear() {
+        return mDate.get(Calendar.YEAR);
+    }
+
+    /**
+     * Set current year
+     *
+     * @param year The current year
+     */
+    public void setCurrentYear(int year) {
+        if (!mInitialising && year == getCurrentYear()) {
+            return;
+        }
+        mDate.set(Calendar.YEAR, year);
+        updateDateControl();
+        onDateTimeChanged();
+    }
+
+    /**
+     * Get current month in the year
+     *
+     * @return The current month in the year
+     */
+    public int getCurrentMonth() {
+        return mDate.get(Calendar.MONTH);
+    }
+
+    /**
+     * Set current month in the year
+     *
+     * @param month The month in the year
+     */
+    public void setCurrentMonth(int month) {
+        if (!mInitialising && month == getCurrentMonth()) {
+            return;
+        }
+        mDate.set(Calendar.MONTH, month);
+        updateDateControl();
+        onDateTimeChanged();
+    }
+
+    /**
+     * Get current day of the month
+     *
+     * @return The day of the month
+     */
+    public int getCurrentDay() {
+        return mDate.get(Calendar.DAY_OF_MONTH);
+    }
+
+    /**
+     * Set current day of the month
+     *
+     * @param dayOfMonth The day of the month
+     */
+    public void setCurrentDay(int dayOfMonth) {
+        if (!mInitialising && dayOfMonth == getCurrentDay()) {
+            return;
+        }
+        mDate.set(Calendar.DAY_OF_MONTH, dayOfMonth);
+        updateDateControl();
+        onDateTimeChanged();
+    }
+
+    /**
+     * Get current hour in 24 hour mode, in the range (0~23)
+     * @return The current hour in 24 hour mode
+     */
+    public int getCurrentHourOfDay() {
+        return mDate.get(Calendar.HOUR_OF_DAY);
+    }
+
+    private int getCurrentHour() {
+        if (mIs24HourView){
+            return getCurrentHourOfDay();
+        } else {
+            int hour = getCurrentHourOfDay();
+            if (hour > HOURS_IN_HALF_DAY) {
+                return hour - HOURS_IN_HALF_DAY;
+            } else {
+                return hour == 0 ? HOURS_IN_HALF_DAY : hour;
+            }
+        }
+    }
+
+    /**
+     * Set current hour in 24 hour mode, in the range (0~23)
+     *
+     * @param hourOfDay
+     */
+    public void setCurrentHour(int hourOfDay) {
+        if (!mInitialising && hourOfDay == getCurrentHourOfDay()) {
+            return;
+        }
+        mDate.set(Calendar.HOUR_OF_DAY, hourOfDay);
+        if (!mIs24HourView) {
+            if (hourOfDay >= HOURS_IN_HALF_DAY) {
+                mIsAm = false;
+                if (hourOfDay > HOURS_IN_HALF_DAY) {
+                    hourOfDay -= HOURS_IN_HALF_DAY;
+                }
+            } else {
+                mIsAm = true;
+                if (hourOfDay == 0) {
+                    hourOfDay = HOURS_IN_HALF_DAY;
+                }
+            }
+            updateAmPmControl();
+        }
+        mHourSpinner.setValue(hourOfDay);
+        onDateTimeChanged();
+    }
+
+    /**
+     * Get currentMinute
+     *
+     * @return The Current Minute
+     */
+    public int getCurrentMinute() {
+        return mDate.get(Calendar.MINUTE);
+    }
+
+    /**
+     * Set current minute
+     */
+    public void setCurrentMinute(int minute) {
+        if (!mInitialising && minute == getCurrentMinute()) {
+            return;
+        }
+        mMinuteSpinner.setValue(minute);
+        mDate.set(Calendar.MINUTE, minute);
+        onDateTimeChanged();
+    }
+
+    /**
+     * @return true if this is in 24 hour view else false.
+     */
+    public boolean is24HourView () {
+        return mIs24HourView;
+    }
+
+    /**
+     * Set whether in 24 hour or AM/PM mode.
+     *
+     * @param is24HourView True for 24 hour mode. False for AM/PM mode.
+     */
+    public void set24HourView(boolean is24HourView) {
+        if (mIs24HourView == is24HourView) {
+            return;
+        }
+        mIs24HourView = is24HourView;
+        mAmPmSpinner.setVisibility(is24HourView ? View.GONE : View.VISIBLE);
+        int hour = getCurrentHourOfDay();
+        updateHourControl();
+        setCurrentHour(hour);
+        updateAmPmControl();
+    }
+
+    private void updateDateControl() {
+        Calendar cal = Calendar.getInstance();
+        cal.setTimeInMillis(mDate.getTimeInMillis());
+        cal.add(Calendar.DAY_OF_YEAR, -DAYS_IN_ALL_WEEK / 2 - 1);
+        mDateSpinner.setDisplayedValues(null);
+        for (int i = 0; i < DAYS_IN_ALL_WEEK; ++i) {
+            cal.add(Calendar.DAY_OF_YEAR, 1);
+            mDateDisplayValues[i] = (String) DateFormat.format("MM.dd EEEE", cal);
+        }
+        mDateSpinner.setDisplayedValues(mDateDisplayValues);
+        mDateSpinner.setValue(DAYS_IN_ALL_WEEK / 2);
+        mDateSpinner.invalidate();// 对于星期几的算法
+    }
+
+    private void updateAmPmControl() {
+        if (mIs24HourView) {
+            mAmPmSpinner.setVisibility(View.GONE);
+        } else {
+            int index = mIsAm ? Calendar.AM : Calendar.PM;
+            mAmPmSpinner.setValue(index);
+            mAmPmSpinner.setVisibility(View.VISIBLE);
+        }// 对于上下午操作的算法
+    }
+
+    private void updateHourControl() {
+        if (mIs24HourView) {
+            mHourSpinner.setMinValue(HOUR_SPINNER_MIN_VAL_24_HOUR_VIEW);
+            mHourSpinner.setMaxValue(HOUR_SPINNER_MAX_VAL_24_HOUR_VIEW);
+        } else {
+            mHourSpinner.setMinValue(HOUR_SPINNER_MIN_VAL_12_HOUR_VIEW);
+            mHourSpinner.setMaxValue(HOUR_SPINNER_MAX_VAL_12_HOUR_VIEW);
+        } //对于小时的算法
+    }
+
+    /**
+     * Set the callback that indicates the 'Set' button has been pressed.
+     * @param callback the callback, if null will do nothing
+     */
+    public void setOnDateTimeChangedListener(OnDateTimeChangedListener callback) {
+        mOnDateTimeChangedListener = callback;
+    }
+
+    private void onDateTimeChanged() {
+        if (mOnDateTimeChangedListener != null) {
+            mOnDateTimeChangedListener.onDateTimeChanged(this, getCurrentYear(),
+                    getCurrentMonth(), getCurrentDay(), getCurrentHourOfDay(), getCurrentMinute());
+        }
+    }
+}

doc/精读报告/ui/DateTimePickerDialog.doc

@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.ui;
+
+import java.util.Calendar;
+
+import net.micode.notes.R;
+import net.micode.notes.ui.DateTimePicker;
+import net.micode.notes.ui.DateTimePicker.OnDateTimeChangedListener;
+
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnClickListener;
+import android.text.format.DateFormat;
+import android.text.format.DateUtils;
+
+public class DateTimePickerDialog extends AlertDialog implements OnClickListener {
+
+    private Calendar mDate = Calendar.getInstance();//创建一个Calendar类型的变量 mDate，方便时间的操作
+    private boolean mIs24HourView;
+    private OnDateTimeSetListener mOnDateTimeSetListener;//声明一个时间日期滚动选择控件 mOnDateTimeSetListener
+    private DateTimePicker mDateTimePicker;//DateTimePicker控件，控件一般用于让用户可以从日期列表中选择单个值。
+    //运行时，单击控件边上的下拉箭头，会显示为两个部分：一个下拉列表，一个用于选择日期
+
+    public interface OnDateTimeSetListener {
+        void OnDateTimeSet(AlertDialog dialog, long date);
+    }
+
+    public DateTimePickerDialog(Context context, long date) {//对该界面对话框的实例化
+        super(context);//对数据库的操作
+        mDateTimePicker = new DateTimePicker(context);
+        setView(mDateTimePicker);//添加一个子视图
+        mDateTimePicker.setOnDateTimeChangedListener(new OnDateTimeChangedListener() {
+            public void onDateTimeChanged(DateTimePicker view, int year, int month,
+                    int dayOfMonth, int hourOfDay, int minute) {
+                mDate.set(Calendar.YEAR, year);
+                mDate.set(Calendar.MONTH, month);
+                mDate.set(Calendar.DAY_OF_MONTH, dayOfMonth);
+                mDate.set(Calendar.HOUR_OF_DAY, hourOfDay);
+                mDate.set(Calendar.MINUTE, minute);//将视图中的各选项设置为系统当前时间
+                updateTitle(mDate.getTimeInMillis());
+            }
+        });
+        mDate.setTimeInMillis(date);//得到系统时间
+        mDate.set(Calendar.SECOND, 0);//将秒数设置为0
+        mDateTimePicker.setCurrentDate(mDate.getTimeInMillis());
+        setButton(context.getString(R.string.datetime_dialog_ok), this);
+        setButton2(context.getString(R.string.datetime_dialog_cancel), (OnClickListener)null);//设置按钮
+        set24HourView(DateFormat.is24HourFormat(this.getContext()));//时间标准化打印
+        updateTitle(mDate.getTimeInMillis());
+    }
+
+    public void set24HourView(boolean is24HourView) {
+        mIs24HourView = is24HourView;
+    }
+
+    public void setOnDateTimeSetListener(OnDateTimeSetListener callBack) {
+        mOnDateTimeSetListener = callBack;
+    }//将时间日期滚动选择控件实例化
+
+    private void updateTitle(long date) {
+        int flag =
+            DateUtils.FORMAT_SHOW_YEAR |
+            DateUtils.FORMAT_SHOW_DATE |
+            DateUtils.FORMAT_SHOW_TIME;
+        flag |= mIs24HourView ? DateUtils.FORMAT_24HOUR : DateUtils.FORMAT_24HOUR;
+        setTitle(DateUtils.formatDateTime(this.getContext(), date, flag));
+    }//android开发中常见日期管理工具类（API）——DateUtils：按照上下午显示时间
+
+    public void onClick(DialogInterface arg0, int arg1) {
+        if (mOnDateTimeSetListener != null) {
+            mOnDateTimeSetListener.OnDateTimeSet(this, mDate.getTimeInMillis());
+        }
+    }//第一个参数arg0是接收到点击事件的对话框
+    //第二个参数arg1是该对话框上的按钮
+
+}

doc/精读报告/ui/DropdownMenu.doc

@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.ui;
+
+import android.content.Context;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+import android.widget.PopupMenu;
+import android.widget.PopupMenu.OnMenuItemClickListener;
+
+import net.micode.notes.R;
+
+public class DropdownMenu {
+    private Button mButton;
+    private PopupMenu mPopupMenu;//声明一个下拉菜单
+    private Menu mMenu;
+
+    public DropdownMenu(Context context, Button button, int menuId) {
+        mButton = button;
+        mButton.setBackgroundResource(R.drawable.dropdown_icon);//设置这个view的背景
+        mPopupMenu = new PopupMenu(context, mButton);
+        mMenu = mPopupMenu.getMenu();
+        mPopupMenu.getMenuInflater().inflate(menuId, mMenu);
+        //MenuInflater是用来实例化Menu目录下的Menu布局文件
+        //根据ID来确认menu的内容选项
+        mButton.setOnClickListener(new OnClickListener() {
+            public void onClick(View v) {
+                mPopupMenu.show();
+            }
+        });
+    }
+
+    public void setOnDropdownMenuItemClickListener(OnMenuItemClickListener listener) {
+        if (mPopupMenu != null) {
+            mPopupMenu.setOnMenuItemClickListener(listener);
+        }//设置菜单的监听
+    }
+
+    public MenuItem findItem(int id) {
+        return mMenu.findItem(id);
+    }//对于菜单选项的初始化，根据索引搜索菜单需要的选项
+
+    public void setTitle(CharSequence title) {
+        mButton.setText(title);
+    }//布局文件，设置标题
+}

doc/精读报告/ui/FoldersListAdapter.doc

@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.ui;
+
+import android.content.Context;//引用一些类，大多为与数据库的交互，对文件夹的列表名称等做调整
+import android.database.Cursor;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.CursorAdapter;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.NoteColumns;
+
+
+public class FoldersListAdapter extends CursorAdapter {
+    //CursorAdapter是Cursor和ListView的接口
+    //FoldersListAdapter继承了CursorAdapter的类
+    //主要作用是便签数据库和用户的交互
+    //这里就是用folder（文件夹）的形式展现给用户
+    public static final String [] PROJECTION = {
+        NoteColumns.ID,
+        NoteColumns.SNIPPET
+    };//调用数据库中便签的ID和片段
+
+    public static final int ID_COLUMN   = 0;
+    public static final int NAME_COLUMN = 1;//初始化Column的id和name,id唯一标识了Colum
+
+    public FoldersListAdapter(Context context, Cursor c) {
+        super(context, c);
+        // TODO Auto-generated constructor stub
+    }//数据库操作
+
+    @Override
+    public View newView(Context context, Cursor cursor, ViewGroup parent) {
+        return new FolderListItem(context);
+    }//创建一个文件夹，对于各文件夹中子标签的初始化
+
+    @Override
+    public void bindView(View view, Context context, Cursor cursor) {
+        if (view instanceof FolderListItem) {
+            String folderName = (cursor.getLong(ID_COLUMN) == Notes.ID_ROOT_FOLDER) ? context
+                    .getString(R.string.menu_move_parent_folder) : cursor.getString(NAME_COLUMN);
+            ((FolderListItem) view).bind(folderName);
+        }
+    }//将各个布局文件绑定起来
+
+    public String getFolderName(Context context, int position) {
+        Cursor cursor = (Cursor) getItem(position);
+        return (cursor.getLong(ID_COLUMN) == Notes.ID_ROOT_FOLDER) ? context
+                .getString(R.string.menu_move_parent_folder) : cursor.getString(NAME_COLUMN);
+    }//根据数据库中标签的ID得到标签的各项内容
+
+    private class FolderListItem extends LinearLayout {
+        private TextView mName;
+
+        public FolderListItem(Context context) {
+            super(context);//操作数据库
+            inflate(context, R.layout.folder_list_item, this);//根据布局文件的名字等信息将其找出来
+            mName = (TextView) findViewById(R.id.tv_folder_name);
+        }
+
+        public void bind(String name) {
+            mName.setText(name);
+        }
+    }
+
+}

doc/精读报告/ui/NoteEditActivity.doc

@@ -0,0 +1,877 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.ui;
+
+import android.app.Activity;
+import android.app.AlarmManager;
+import android.app.AlertDialog;
+import android.app.PendingIntent;
+import android.app.SearchManager;
+import android.appwidget.AppWidgetManager;
+import android.content.ContentUris;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.graphics.Paint;
+import android.os.Bundle;
+import android.preference.PreferenceManager;
+import android.text.Spannable;
+import android.text.SpannableString;
+import android.text.TextUtils;
+import android.text.format.DateUtils;
+import android.text.style.BackgroundColorSpan;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.WindowManager;
+import android.widget.CheckBox;
+import android.widget.CompoundButton;
+import android.widget.CompoundButton.OnCheckedChangeListener;
+import android.widget.EditText;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.TextNote;
+import net.micode.notes.model.WorkingNote;
+import net.micode.notes.model.WorkingNote.NoteSettingChangedListener;
+import net.micode.notes.tool.DataUtils;
+import net.micode.notes.tool.ResourceParser;
+import net.micode.notes.tool.ResourceParser.TextAppearanceResources;
+import net.micode.notes.ui.DateTimePickerDialog.OnDateTimeSetListener;
+import net.micode.notes.ui.NoteEditText.OnTextViewChangeListener;
+import net.micode.notes.widget.NoteWidgetProvider_2x;
+import net.micode.notes.widget.NoteWidgetProvider_4x;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+
+public class NoteEditActivity extends Activity implements OnClickListener,
+        NoteSettingChangedListener, OnTextViewChangeListener {
+    //该类主要是针对标签的编辑
+    //继承了系统内部许多和监听有关的类
+    private class HeadViewHolder {
+        public TextView tvModified;
+
+        public ImageView ivAlertIcon;
+
+        public TextView tvAlertDate;
+
+        public ImageView ibSetBgColor;
+    } //使用Map实现数据存储
+
+    private static final Map<Integer, Integer> sBgSelectorBtnsMap = new HashMap<Integer, Integer>();
+    static {
+        sBgSelectorBtnsMap.put(R.id.iv_bg_yellow, ResourceParser.YELLOW);//设置黄色的背景颜色资源选择器
+        sBgSelectorBtnsMap.put(R.id.iv_bg_red, ResourceParser.RED);//设置红色的背景颜色资源选择器
+        sBgSelectorBtnsMap.put(R.id.iv_bg_blue, ResourceParser.BLUE);//设置蓝色的背景颜色资源选择器
+        sBgSelectorBtnsMap.put(R.id.iv_bg_green, ResourceParser.GREEN);//设置绿色的背景颜色资源选择器
+        sBgSelectorBtnsMap.put(R.id.iv_bg_white, ResourceParser.WHITE);//设置白色的背景颜色资源选择器
+        //put函数是将指定值和指定键相连
+    }
+
+    private static final Map<Integer, Integer> sBgSelectorSelectionMap = new HashMap<Integer, Integer>();
+    static {
+        sBgSelectorSelectionMap.put(ResourceParser.YELLOW, R.id.iv_bg_yellow_select);
+        sBgSelectorSelectionMap.put(ResourceParser.RED, R.id.iv_bg_red_select);
+        sBgSelectorSelectionMap.put(ResourceParser.BLUE, R.id.iv_bg_blue_select);
+        sBgSelectorSelectionMap.put(ResourceParser.GREEN, R.id.iv_bg_green_select);
+        sBgSelectorSelectionMap.put(ResourceParser.WHITE, R.id.iv_bg_white_select);
+    }
+
+    private static final Map<Integer, Integer> sFontSizeBtnsMap = new HashMap<Integer, Integer>();
+    static {
+        sFontSizeBtnsMap.put(R.id.ll_font_large, ResourceParser.TEXT_LARGE);
+        sFontSizeBtnsMap.put(R.id.ll_font_small, ResourceParser.TEXT_SMALL);
+        sFontSizeBtnsMap.put(R.id.ll_font_normal, ResourceParser.TEXT_MEDIUM);
+        sFontSizeBtnsMap.put(R.id.ll_font_super, ResourceParser.TEXT_SUPER);
+    }//用户可以选择笔记本界面的大小，提供四个规格
+
+    private static final Map<Integer, Integer> sFontSelectorSelectionMap = new HashMap<Integer, Integer>();
+    static {
+        sFontSelectorSelectionMap.put(ResourceParser.TEXT_LARGE, R.id.iv_large_select);
+        sFontSelectorSelectionMap.put(ResourceParser.TEXT_SMALL, R.id.iv_small_select);
+        sFontSelectorSelectionMap.put(ResourceParser.TEXT_MEDIUM, R.id.iv_medium_select);
+        sFontSelectorSelectionMap.put(ResourceParser.TEXT_SUPER, R.id.iv_super_select);
+    }
+
+    private static final String TAG = "NoteEditActivity";
+
+    private HeadViewHolder mNoteHeaderHolder;
+
+    private View mHeadViewPanel;
+    //私有化一个界面操作mHeadViewPanel，对表头的操作
+    private View mNoteBgColorSelector;
+    //私有化一个界面操作mNoteBgColorSelector，对背景颜色的操作
+    private View mFontSizeSelector;
+    //私有化一个界面操作mFontSizeSelector，对标签字体的操作
+    private EditText mNoteEditor;
+    //声明编辑控件，对文本操作
+    private View mNoteEditorPanel;
+    //私有化一个界面操作mNoteEditorPanel，文本编辑的控制板
+    private WorkingNote mWorkingNote;
+    //对模板WorkingNote的初始化
+    private SharedPreferences mSharedPrefs;//私有化SharedPreferences的数据存储方式
+    private int mFontSizeId;//用于操作字体的大小
+
+    private static final String PREFERENCE_FONT_SIZE = "pref_font_size";//定义常量 字体大小设置
+
+    private static final int SHORTCUT_ICON_TITLE_MAX_LEN = 10;//定义final常量，设置了桌面快捷方式标题的最大长度
+
+    public static final String TAG_CHECKED = String.valueOf('\u221A');//定义final字符串，表明已标记
+    public static final String TAG_UNCHECKED = String.valueOf('\u25A1');//定义final字符串，表明未标记
+
+    private LinearLayout mEditTextList;//线性布局
+
+    private String mUserQuery;//用户请求
+    private Pattern mPattern;//一个Pattern是一个正则表达式经编译后的表现模式
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {//初始化系统的状态
+        super.onCreate(savedInstanceState);
+        this.setContentView(R.layout.note_edit);
+
+        if (savedInstanceState == null && !initActivityState(getIntent())) {//判断传入参数是否为空，且对activity进行初始化是否成功，满足则结束create函数 如果传入的保存的状态不为NULL时，则不会调用之后的initActivityState函数进行初始化操作
+            finish();
+            return;
+        }
+        initResources();
+    }
+
+    /**
+     * Current activity may be killed when the memory is low. Once it is killed, for another time
+     * user load this activity, we should restore the former state
+     */
+    @Override
+    protected void onRestoreInstanceState(Bundle savedInstanceState) {//保存当前界面状态。当当前的活动界面因为释放内存而结束，再次加载活动时，可以根据保存的信息恢复到原来的状态
+        super.onRestoreInstanceState(savedInstanceState);
+        if (savedInstanceState != null && savedInstanceState.containsKey(Intent.EXTRA_UID)) {
+            Intent intent = new Intent(Intent.ACTION_VIEW);
+            intent.putExtra(Intent.EXTRA_UID, savedInstanceState.getLong(Intent.EXTRA_UID));
+            if (!initActivityState(intent)) {
+                finish();
+                return;
+            }
+            Log.d(TAG, "Restoring from killed activity");
+        }
+    }
+
+    private boolean initActivityState(Intent intent) {//用户没有给出ID，就跳转到NoteListActivity
+        /**
+         * If the user specified the {@link Intent#ACTION_VIEW} but not provided with id,
+         * then jump to the NotesListActivity
+         */
+        mWorkingNote = null;
+        if (TextUtils.equals(Intent.ACTION_VIEW, intent.getAction())) {//判断intent中的action是ACTION_VIEW还是ACTION_INSERT_OR_EDIT,分别进行不同的操作
+            long noteId = intent.getLongExtra(Intent.EXTRA_UID, 0);
+            mUserQuery = "";
+
+            /**
+             * Starting from the searched result
+             */
+            if (intent.hasExtra(SearchManager.EXTRA_DATA_KEY)) {//查找intent中的数据。将数据标识符存在noteIId中，用户请求字符串存在mUserQuery中
+                noteId = Long.parseLong(intent.getStringExtra(SearchManager.EXTRA_DATA_KEY));
+                mUserQuery = intent.getStringExtra(SearchManager.USER_QUERY);
+            }
+
+            if (!DataUtils.visibleInNoteDatabase(getContentResolver(), noteId, Notes.TYPE_NOTE)) {//如果没有找到便签标识符，就跳转到主界面
+                Intent jump = new Intent(this, NotesListActivity.class);
+                startActivity(jump);
+                showToast(R.string.error_note_not_exist);
+                finish();
+                return false;
+            } else {
+                mWorkingNote = WorkingNote.load(this, noteId);//根据noteId导入WorkingNote
+                if (mWorkingNote == null) {//noteId对应的活动标签为空，报错并结束活动，初始化活动返回false,即初始化活动状态位成功
+                    Log.e(TAG, "load note failed with note id" + noteId);//导出信息失败 反馈错误信息
+                    finish();
+                    return false;
+                }
+            }
+            getWindow().setSoftInputMode(//设置软键盘输入模式
+                    WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN//将软键盘进行隐藏
+                            | WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);//调节Edit界面，使之适应软键盘弹出
+        } else if(TextUtils.equals(Intent.ACTION_INSERT_OR_EDIT, intent.getAction())) {//判断intent的活动是INSERT OR EDIT，即新建便签
+            // New note
+            long folderId = intent.getLongExtra(Notes.INTENT_EXTRA_FOLDER_ID, 0);
+            int widgetId = intent.getIntExtra(Notes.INTENT_EXTRA_WIDGET_ID,
+                    AppWidgetManager.INVALID_APPWIDGET_ID);
+            int widgetType = intent.getIntExtra(Notes.INTENT_EXTRA_WIDGET_TYPE,
+                    Notes.TYPE_WIDGET_INVALIDE);
+            int bgResId = intent.getIntExtra(Notes.INTENT_EXTRA_BACKGROUND_ID,
+                    ResourceParser.getDefaultBgId(this));
+
+            // Parse call-record note
+            String phoneNumber = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);//下面的程序实现的功能是解析通话记录便签，首先获取intent里的电话号码
+            long callDate = intent.getLongExtra(Notes.INTENT_EXTRA_CALL_DATE, 0);//获得通话日期
+            if (callDate != 0 && phoneNumber != null) {//如果便签的通话日期和通话号码均存在，则把其当做通话便签进行处理,否则当做普通便签进行初始化
+                if (TextUtils.isEmpty(phoneNumber)) {//如果记录的通话号码为空，则显示警告
+                    Log.w(TAG, "The call record number is null");
+                }
+                long noteId = 0;
+                if ((noteId = DataUtils.getNoteIdByPhoneNumberAndCallDate(getContentResolver(),//根据电话号码和日期找到对应标识符，赋给noteId.
+                        phoneNumber, callDate)) > 0) {
+                    mWorkingNote = WorkingNote.load(this, noteId);
+                    if (mWorkingNote == null) {
+                        Log.e(TAG, "load call note failed with note id" + noteId);
+                        finish();
+                        return false;
+                    }
+                } else {//将电话号码与手机的号码簿相关联
+                    mWorkingNote = WorkingNote.createEmptyNote(this, folderId, widgetId,
+                            widgetType, bgResId);
+                    mWorkingNote.convertToCallNote(phoneNumber, callDate);
+                }
+            } else {
+                mWorkingNote = WorkingNote.createEmptyNote(this, folderId, widgetId, widgetType,
+                        bgResId);
+            }
+
+            getWindow().setSoftInputMode(
+                    WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE
+                            | WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);
+        } else {
+            Log.e(TAG, "Intent not specified action, should not support");//显示错误信息，Intent没有指定动作，不应支持
+            finish();
+            return false;
+        }
+        mWorkingNote.setOnSettingStatusChangedListener(this);
+        return true;
+    }
+
+    @Override
+    protected void onResume() {//重写Activity的onResume方法，将标签编辑界面作为界面的最上层呈现
+        super.onResume();
+        initNoteScreen();
+    }
+
+    private void initNoteScreen() {//初始化便签界面的窗口
+        mNoteEditor.setTextAppearance(this, TextAppearanceResources
+                .getTexAppearanceResource(mFontSizeId));
+        if (mWorkingNote.getCheckListMode() == TextNote.MODE_CHECK_LIST) {//如果载入的workingnote对象模式为Check_List则调用switchToListMode函数
+            switchToListMode(mWorkingNote.getContent());//切换到清单模式
+        } else {
+            mNoteEditor.setText(getHighlightQueryResult(mWorkingNote.getContent(), mUserQuery));//设置文本选中的文字和长度
+            mNoteEditor.setSelection(mNoteEditor.getText().length());
+        }
+        for (Integer id : sBgSelectorSelectionMap.keySet()) {//对所有图片文件做遍历循环，将其可视性设为不可视
+            findViewById(sBgSelectorSelectionMap.get(id)).setVisibility(View.GONE);
+        }
+        mHeadViewPanel.setBackgroundResource(mWorkingNote.getTitleBgResId());
+        mNoteEditorPanel.setBackgroundResource(mWorkingNote.getBgColorResId());
+
+        mNoteHeaderHolder.tvModified.setText(DateUtils.formatDateTime(this,
+                mWorkingNote.getModifiedDate(), DateUtils.FORMAT_SHOW_DATE
+                        | DateUtils.FORMAT_NUMERIC_DATE | DateUtils.FORMAT_SHOW_TIME
+                        | DateUtils.FORMAT_SHOW_YEAR));
+
+        /**
+         * TODO: Add the menu for setting alert. Currently disable it because the DateTimePicker
+         * is not ready
+         */
+        showAlertHeader();
+    }
+
+    private void showAlertHeader() {//显示便签提醒的标头
+        if (mWorkingNote.hasClockAlert()) {
+            long time = System.currentTimeMillis();//获取当前时间，定义为long类型
+            if (time > mWorkingNote.getAlertDate()) {//.如果系统时间大于了闹钟设置的时间，那么闹钟失效
+                mNoteHeaderHolder.tvAlertDate.setText(R.string.note_alert_expired);
+            } else {
+                mNoteHeaderHolder.tvAlertDate.setText(DateUtils.getRelativeTimeSpanString(
+                        mWorkingNote.getAlertDate(), time, DateUtils.MINUTE_IN_MILLIS));//如果提醒时间未到，则设置标题中显示提醒时间
+            }
+            mNoteHeaderHolder.tvAlertDate.setVisibility(View.VISIBLE);//显示闹钟提醒的开始图标
+            mNoteHeaderHolder.ivAlertIcon.setVisibility(View.VISIBLE);//提醒时间图标显示可见
+        } else {
+            mNoteHeaderHolder.tvAlertDate.setVisibility(View.GONE);
+            mNoteHeaderHolder.ivAlertIcon.setVisibility(View.GONE);//如果便签不包含提醒，则不显示
+        };
+    }
+
+    @Override
+    protected void onNewIntent(Intent intent) {//当活动从后台切换但前台时会调用该函数，再次启动Activity的状态
+        super.onNewIntent(intent);
+        initActivityState(intent);
+    }
+
+    @Override
+    protected void onSaveInstanceState(Bundle outState) {//该函数用于分派触摸事件，其中参数MotionEvent是对屏幕触控的传递机制
+        super.onSaveInstanceState(outState);
+        /**
+         * For new note without note id, we should firstly save it to
+         * generate a id. If the editing note is not worth saving, there
+         * is no id which is equivalent to create new note
+         */
+        if (!mWorkingNote.existInDatabase()) {//当文字大小选择器可见，并且触控事件不在它的范围内时，执行下面代码
+            saveNote();
+        }
+        outState.putLong(Intent.EXTRA_UID, mWorkingNote.getNoteId());
+        Log.d(TAG, "Save working note id: " + mWorkingNote.getNoteId() + " onSaveInstanceState");
+    }
+
+    @Override
+    public boolean dispatchTouchEvent(MotionEvent ev) {//判断屏幕上的触控动作是否在视图范围内
+        if (mNoteBgColorSelector.getVisibility() == View.VISIBLE
+                && !inRangeOfView(mNoteBgColorSelector, ev)) {
+            mNoteBgColorSelector.setVisibility(View.GONE);
+            return true;
+        }
+
+        if (mFontSizeSelector.getVisibility() == View.VISIBLE
+                && !inRangeOfView(mFontSizeSelector, ev)) {
+            mFontSizeSelector.setVisibility(View.GONE);
+            return true;
+        }
+        return super.dispatchTouchEvent(ev);
+    }
+
+    private boolean inRangeOfView(View view, MotionEvent ev) {
+        int []location = new int[2];
+        view.getLocationOnScreen(location);//获取屏幕上的起点位置
+        int x = location[0];
+        int y = location[1];
+        if (ev.getX() < x//当触摸点的位置超出该控件的视图区域范围时，返回false
+                || ev.getX() > (x + view.getWidth())
+                || ev.getY() < y
+                || ev.getY() > (y + view.getHeight())) {
+                    return false;
+                }
+        return true;
+    }
+
+    private void initResources() {//对标签各项属性内容的初始化
+        mHeadViewPanel = findViewById(R.id.note_title);
+        mNoteHeaderHolder = new HeadViewHolder();
+        mNoteHeaderHolder.tvModified = (TextView) findViewById(R.id.tv_modified_date);
+        mNoteHeaderHolder.ivAlertIcon = (ImageView) findViewById(R.id.iv_alert_icon);
+        mNoteHeaderHolder.tvAlertDate = (TextView) findViewById(R.id.tv_alert_date);
+        mNoteHeaderHolder.ibSetBgColor = (ImageView) findViewById(R.id.btn_set_bg_color);
+        mNoteHeaderHolder.ibSetBgColor.setOnClickListener(this);
+        mNoteEditor = (EditText) findViewById(R.id.note_edit_view);
+        mNoteEditorPanel = findViewById(R.id.sv_note_edit);
+        mNoteBgColorSelector = findViewById(R.id.note_bg_color_selector);
+        for (int id : sBgSelectorBtnsMap.keySet()) {
+            ImageView iv = (ImageView) findViewById(id);
+            iv.setOnClickListener(this);
+        }
+
+        mFontSizeSelector = findViewById(R.id.font_size_selector);//为背景颜色选择界面的每一个按钮设置相对应的资源文件，并且设置了点击事件监听器
+        for (int id : sFontSizeBtnsMap.keySet()) {
+            View view = findViewById(id);
+            view.setOnClickListener(this);
+        };
+        mSharedPrefs = PreferenceManager.getDefaultSharedPreferences(this);//得到用户的偏好信息，设置字体大小，如果大于资源的最大长度，设为默认大小
+        mFontSizeId = mSharedPrefs.getInt(PREFERENCE_FONT_SIZE, ResourceParser.BG_DEFAULT_FONT_SIZE);
+        /**
+         * HACKME: Fix bug of store the resource id in shared preference.
+         * The id may larger than the length of resources, in this case,
+         * return the {@link ResourceParser#BG_DEFAULT_FONT_SIZE}
+         */
+        if(mFontSizeId >= TextAppearanceResources.getResourcesSize()) {//如果Size大于TextAppearance的大小，则将之设置为默认大小
+            mFontSizeId = ResourceParser.BG_DEFAULT_FONT_SIZE;
+        }
+        mEditTextList = (LinearLayout) findViewById(R.id.note_edit_list);//得到布局列表
+    }
+
+    @Override
+    protected void onPause() {//重写onPause方法，将便签编辑界面暂停
+        super.onPause();
+        if(saveNote()) {
+            Log.d(TAG, "Note data was saved with length:" + mWorkingNote.getContent().length());//暂停时即进行便签的存储,记录log文件
+        }
+        clearSettingState();
+    }
+
+    private void updateWidget() {//更新窗口与桌面小窗口同步
+        Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
+        if (mWorkingNote.getWidgetType() == Notes.TYPE_WIDGET_2X) {
+            intent.setClass(this, NoteWidgetProvider_2x.class);//判断当前工作中的便签的桌面挂件的类型,并根据不同类型的桌面挂件指定Intent不同的目的组件
+        } else if (mWorkingNote.getWidgetType() == Notes.TYPE_WIDGET_4X) {
+            intent.setClass(this, NoteWidgetProvider_4x.class);
+        } else {
+            Log.e(TAG, "Unspported widget type");//Log输出error信息，不支持的widget类型
+            return;
+        }
+
+        intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, new int[] {
+            mWorkingNote.getWidgetId()
+        });
+
+        sendBroadcast(intent);
+        setResult(RESULT_OK, intent);
+    }
+
+    public void onClick(View v) {//事件点击时执行该方法
+        int id = v.getId();//获取点击目标的id
+        if (id == R.id.btn_set_bg_color) {//如果点击的是设置背景颜色，执行下面的函数
+            mNoteBgColorSelector.setVisibility(View.VISIBLE);
+            findViewById(sBgSelectorSelectionMap.get(mWorkingNote.getBgColorId())).setVisibility(
+                    -                    View.VISIBLE);
+        } else if (sBgSelectorBtnsMap.containsKey(id)) {//将备选颜色界面设为不可见
+            findViewById(sBgSelectorSelectionMap.get(mWorkingNote.getBgColorId())).setVisibility(
+                    View.GONE);
+            mWorkingNote.setBgColorId(sBgSelectorBtnsMap.get(id));
+            mNoteBgColorSelector.setVisibility(View.GONE);
+        } else if (sFontSizeBtnsMap.containsKey(id)) {//判断是否是文字大小设置器中的文字大小选项按钮
+            findViewById(sFontSelectorSelectionMap.get(mFontSizeId)).setVisibility(View.GONE);
+            mFontSizeId = sFontSizeBtnsMap.get(id);
+            mSharedPrefs.edit().putInt(PREFERENCE_FONT_SIZE, mFontSizeId).commit();
+            findViewById(sFontSelectorSelectionMap.get(mFontSizeId)).setVisibility(View.VISIBLE);
+            if (mWorkingNote.getCheckListMode() == TextNote.MODE_CHECK_LIST) {//如果workingNote模式为核对列表模式，则执行下面函数
+                getWorkingText();
+                switchToListMode(mWorkingNote.getContent());
+            } else {
+                mNoteEditor.setTextAppearance(this,//如果不是check模式，则设置文字编辑器中文字为相应字体大小
+                        TextAppearanceResources.getTexAppearanceResource(mFontSizeId));
+            }
+            mFontSizeSelector.setVisibility(View.GONE);
+        }
+    }
+
+    @Override
+    public void onBackPressed() {//点击返回键时的操作
+        if(clearSettingState()) {//如果字体选择器和背景选择器均不可见，即为便签编辑界面，点击返回键退出，保存便签如果字体选择器和背景选择器可见，则点击返回键时关闭选择界面
+
+            return;
+        }
+
+        saveNote();
+        super.onBackPressed();
+    }
+
+    private boolean clearSettingState() {//清除设置状态
+        if (mNoteBgColorSelector.getVisibility() == View.VISIBLE) {//将字体选择器和背景颜色选择器设为不可见
+            mNoteBgColorSelector.setVisibility(View.GONE);
+            return true;
+        } else if (mFontSizeSelector.getVisibility() == View.VISIBLE) {//如果文字大小选择器可见，则将其设置为不可见
+            mFontSizeSelector.setVisibility(View.GONE);
+            return true;
+        }
+        return false;
+    }
+
+    public void onBackgroundColorChanged() {//设置背景颜色改变的监听
+        findViewById(sBgSelectorSelectionMap.get(mWorkingNote.getBgColorId())).setVisibility(
+                View.VISIBLE);//将便签背景色设置为可见，并显示该视图
+        mNoteEditorPanel.setBackgroundResource(mWorkingNote.getBgColorResId());//将文件编辑区域的背景资源设置为便签背景色
+        mHeadViewPanel.setBackgroundResource(mWorkingNote.getTitleBgResId());//将便签头的背景资源设置为标题的背景色
+    }
+
+    @Override
+    public boolean onPrepareOptionsMenu(Menu menu) {
+        if (isFinishing()) {//如果窗口正在关闭，则不做处理
+            return true;
+        }
+        clearSettingState();//清除设置状态
+        menu.clear();//清除菜单项
+        if (mWorkingNote.getFolderId() == Notes.ID_CALL_RECORD_FOLDER) {//如果便签所在的文件夹为便签的通话记录文件夹，执行下面函数
+            getMenuInflater().inflate(R.menu.call_note_edit, menu);
+        } else {
+            getMenuInflater().inflate(R.menu.note_edit, menu);
+        }
+        if (mWorkingNote.getCheckListMode() == TextNote.MODE_CHECK_LIST) {//判断语句判断条件为是否为清单模式，根据是否为清单模式填充不同的资源
+            menu.findItem(R.id.menu_list_mode).setTitle(R.string.menu_normal_mode);
+        } else {
+            menu.findItem(R.id.menu_list_mode).setTitle(R.string.menu_list_mode);
+        }
+        if (mWorkingNote.hasClockAlert()) {//如果便签中有闹钟的提醒。则菜单中的提醒按钮不可见。如果没有提醒，删除提醒按钮不可见
+            menu.findItem(R.id.menu_alert).setVisible(false);
+        } else {
+            menu.findItem(R.id.menu_delete_remind).setVisible(false);
+        }
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {//监听菜单中的项是否被选择
+        switch (item.getItemId()) {//获得项的id,即根据菜单中不同的按钮设置不同的处理
+            case R.id.menu_new_note:
+                createNewNote();//创建新的便签
+                break;
+            case R.id.menu_delete:
+                AlertDialog.Builder builder = new AlertDialog.Builder(this);//新建一个提醒对话框实例，用于确认删除操作
+                builder.setTitle(getString(R.string.alert_title_delete));//创建关于删除操作的对话框
+                builder.setIcon(android.R.drawable.ic_dialog_alert);//设置对话框图标
+                builder.setMessage(getString(R.string.alert_message_delete_note));//设置对话框消息内容
+                builder.setPositiveButton(android.R.string.ok,//设置确认按钮，并监听它是否被点击
+                        new DialogInterface.OnClickListener() {
+                            public void onClick(DialogInterface dialog, int which) {//设置对话框的点击函数
+                                deleteCurrentNote();//删除当前的便签
+                                finish();//结束这个activity
+                            }
+                        });
+                builder.setNegativeButton(android.R.string.cancel, null);//设置取消按钮
+                builder.show();//显示提醒对话框
+                break;
+            case R.id.menu_font_size://菜单字体大小的设置
+                mFontSizeSelector.setVisibility(View.VISIBLE);//将字体大小选择器设置为可见
+                findViewById(sFontSelectorSelectionMap.get(mFontSizeId)).setVisibility(View.VISIBLE);//通过id找到相应字体的大小
+                break;
+            case R.id.menu_list_mode://选择清单模式
+                mWorkingNote.setCheckListMode(mWorkingNote.getCheckListMode() == 0 ?//设置清单模式，若当前为清单模式，则取消；否之则设为清单模式
+                        TextNote.MODE_CHECK_LIST : 0);
+                break;
+            case R.id.menu_share://选择分享
+                getWorkingText();//获取当前便签的文本
+                sendTo(this, mWorkingNote.getContent());//发送文本
+                break;
+            case R.id.menu_send_to_desktop://选择发送到桌面
+                sendToDesktop();
+                break;
+            case R.id.menu_alert://选择设置提醒
+                setReminder();
+                break;
+            case R.id.menu_delete_remind://选择删除提醒
+                mWorkingNote.setAlertDate(0, false);
+                break;
+            default:
+                break;
+        }
+        return true;
+    }
+
+    private void setReminder() {//设置提醒器
+        DateTimePickerDialog d = new DateTimePickerDialog(this, System.currentTimeMillis());//实例化一个时间日期选择器的对话框，进行提醒日期的设置
+        d.setOnDateTimeSetListener(new OnDateTimeSetListener() {
+            public void OnDateTimeSet(AlertDialog dialog, long date) {
+                mWorkingNote.setAlertDate(date	, true);
+            }
+        });
+        d.show();
+    }
+
+    /**
+     * Share note to apps that support {@link Intent#ACTION_SEND} action
+     * and {@text/plain} type
+     */
+    private void sendTo(Context context, String info) {//将便签的文本发送到其他支持plain类型文字显示的app中
+        Intent intent = new Intent(Intent.ACTION_SEND);
+        intent.putExtra(Intent.EXTRA_TEXT, info);
+        intent.setType("text/plain");
+        context.startActivity(intent);
+    }
+
+    private void createNewNote() {//创建新的便签
+        // Firstly, save current editing notes
+        saveNote();
+
+        // For safety, start a new NoteEditActivity
+        finish();
+        Intent intent = new Intent(this, NoteEditActivity.class);//设置一个新的便签活动编辑器
+        intent.setAction(Intent.ACTION_INSERT_OR_EDIT);
+        intent.putExtra(Notes.INTENT_EXTRA_FOLDER_ID, mWorkingNote.getFolderId());
+        startActivity(intent);
+    }
+
+    private void deleteCurrentNote() {//删除当前的便签
+        if (mWorkingNote.existInDatabase()) {
+            HashSet<Long> ids = new HashSet<Long>();
+            long id = mWorkingNote.getNoteId();
+            if (id != Notes.ID_ROOT_FOLDER) {
+                ids.add(id);
+            } else {
+                Log.d(TAG, "Wrong note id, should not happen");
+            }
+            if (!isSyncMode()) {
+                if (!DataUtils.batchDeleteNotes(getContentResolver(), ids)) {
+                    Log.e(TAG, "Delete Note error");
+                }
+            } else {
+                if (!DataUtils.batchMoveToFolder(getContentResolver(), ids, Notes.ID_TRASH_FOLER)) {
+                    Log.e(TAG, "Move notes to trash folder error, should not happens");
+                }
+            }
+        }
+        mWorkingNote.markDeleted(true);
+    }
+
+    private boolean isSyncMode() {//判断是否为同步模式
+        return NotesPreferenceActivity.getSyncAccountName(this).trim().length() > 0;
+    }//返回同步的用户名长度，如果大于0则有同步状态，否则非同步
+
+    public void onClockAlertChanged(long date, boolean set) {//设置闹钟提醒改变的监听
+        /**
+         * User could set clock to an unsaved note, so before setting the
+         * alert clock, we should save the note first
+         */
+        if (!mWorkingNote.existInDatabase()) {//如果设置提醒的便签未保存，则先保存
+            saveNote();
+        }
+        if (mWorkingNote.getNoteId() > 0) {//数据库中有该提醒的id,执行下面操作。否则，报错
+            Intent intent = new Intent(this, AlarmReceiver.class);
+            intent.setData(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, mWorkingNote.getNoteId()));
+            PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
+            AlarmManager alarmManager = ((AlarmManager) getSystemService(ALARM_SERVICE));
+            showAlertHeader();
+            if(!set) {
+                alarmManager.cancel(pendingIntent);
+            } else {
+                alarmManager.set(AlarmManager.RTC_WAKEUP, date, pendingIntent);
+            }
+        } else {
+            /**
+             * There is the condition that user has input nothing (the note is
+             * not worthy saving), we have no note id, remind the user that he
+             * should input something
+             */
+            Log.e(TAG, "Clock alert setting error");
+            showToast(R.string.error_note_empty_for_clock);
+        }
+    }
+
+    public void onWidgetChanged() {
+        updateWidget();
+    }//当widget变化时，执行更新widget的函数
+
+    public void onEditTextDelete(int index, String text) {//当删除编辑文本时，执行这个函数
+        int childCount = mEditTextList.getChildCount();
+        if (childCount == 1) {
+            return;
+        }
+
+        for (int i = index + 1; i < childCount; i++) {
+            ((NoteEditText) mEditTextList.getChildAt(i).findViewById(R.id.et_edit_text))
+                    .setIndex(i - 1);
+        }
+
+        mEditTextList.removeViewAt(index);
+        NoteEditText edit = null;
+        if(index == 0) {
+            edit = (NoteEditText) mEditTextList.getChildAt(0).findViewById(
+                    R.id.et_edit_text);
+        } else {
+            edit = (NoteEditText) mEditTextList.getChildAt(index - 1).findViewById(
+                    R.id.et_edit_text);
+        }
+        int length = edit.length();
+        edit.append(text);
+        edit.requestFocus();
+        edit.setSelection(length);
+    }
+
+    public void onEditTextEnter(int index, String text) {//进入编辑文本框所触发的事件
+        /**
+         * Should not happen, check for debug
+         */
+        if(index > mEditTextList.getChildCount()) {//如果便签长度超过了限制，则提示错误
+            Log.e(TAG, "Index out of mEditTextList boundrary, should not happen");
+        }
+
+        View view = getListItem(text, index);
+        mEditTextList.addView(view, index);
+        NoteEditText edit = (NoteEditText) view.findViewById(R.id.et_edit_text);
+        edit.requestFocus();
+        edit.setSelection(0);
+        for (int i = index + 1; i < mEditTextList.getChildCount(); i++) {//遍历子文本框并设置对应对下标
+            ((NoteEditText) mEditTextList.getChildAt(i).findViewById(R.id.et_edit_text))
+                    .setIndex(i);
+        }
+    }
+
+    private void switchToListMode(String text) {//切换至列表模式
+        mEditTextList.removeAllViews();
+        String[] items = text.split("\n");
+        int index = 0;
+        for (String item : items) {
+            if(!TextUtils.isEmpty(item)) {
+                mEditTextList.addView(getListItem(item, index));
+                index++;
+            }
+        }
+        mEditTextList.addView(getListItem("", index));
+        mEditTextList.getChildAt(index).findViewById(R.id.et_edit_text).requestFocus();
+
+        mNoteEditor.setVisibility(View.GONE);
+        mEditTextList.setVisibility(View.VISIBLE);
+    }//清空所有视图 初始化下标 遍历所有文本单元并添加到文本框中 优先请求此操作 便签编辑器不可见 将文本编辑框置为可见
+
+    private Spannable getHighlightQueryResult(String fullText, String userQuery) {//获取高亮效果的反馈结果
+        SpannableString spannable = new SpannableString(fullText == null ? "" : fullText);
+        if (!TextUtils.isEmpty(userQuery)) {
+            mPattern = Pattern.compile(userQuery);
+            Matcher m = mPattern.matcher(fullText);
+            int start = 0;
+            while (m.find(start)) {
+                spannable.setSpan(
+                        new BackgroundColorSpan(this.getResources().getColor(
+                                R.color.user_query_highlight)), m.start(), m.end(),
+                        Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
+                start = m.end();
+            }
+        }
+        return spannable;
+    }
+
+    private View getListItem(String item, int index) {//获取列表项
+        View view = LayoutInflater.from(this).inflate(R.layout.note_edit_list_item, null);
+        final NoteEditText edit = (NoteEditText) view.findViewById(R.id.et_edit_text);
+        edit.setTextAppearance(this, TextAppearanceResources.getTexAppearanceResource(mFontSizeId));
+        CheckBox cb = ((CheckBox) view.findViewById(R.id.cb_edit_item));
+        cb.setOnCheckedChangeListener(new OnCheckedChangeListener() {
+            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {//如果CheckBox已勾选，则执行下面函数，设置显示方式
+                if (isChecked) {//如果已经被标记
+                    edit.setPaintFlags(edit.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
+                } else {
+                    edit.setPaintFlags(Paint.ANTI_ALIAS_FLAG | Paint.DEV_KERN_TEXT_FLAG);
+                }
+            }
+        });
+
+        if (item.startsWith(TAG_CHECKED)) {//判断是否勾选
+            cb.setChecked(true);
+            edit.setPaintFlags(edit.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
+            item = item.substring(TAG_CHECKED.length(), item.length()).trim();
+        } else if (item.startsWith(TAG_UNCHECKED)) {
+            cb.setChecked(false);
+            edit.setPaintFlags(Paint.ANTI_ALIAS_FLAG | Paint.DEV_KERN_TEXT_FLAG);
+            item = item.substring(TAG_UNCHECKED.length(), item.length()).trim();
+        }
+
+        edit.setOnTextViewChangeListener(this);
+        edit.setIndex(index);
+        edit.setText(getHighlightQueryResult(item, mUserQuery));
+        return view;
+    }
+
+    public void onTextChange(int index, boolean hasText) {//便签内容发生改变所触发的事件 越界报错 如果内容不为空则将其子编辑框可见性置为可见，否则不可见
+        if (index >= mEditTextList.getChildCount()) {
+            Log.e(TAG, "Wrong index, should not happen");
+            return;
+        }
+        if(hasText) {
+            mEditTextList.getChildAt(index).findViewById(R.id.cb_edit_item).setVisibility(View.VISIBLE);
+        } else {
+            mEditTextList.getChildAt(index).findViewById(R.id.cb_edit_item).setVisibility(View.GONE);
+        }
+    }
+
+    public void onCheckListModeChanged(int oldMode, int newMode) {//监听清单模式的变化
+        if (newMode == TextNote.MODE_CHECK_LIST) {
+            switchToListMode(mNoteEditor.getText().toString());
+        } else {
+            if (!getWorkingText()) {
+                mWorkingNote.setWorkingText(mWorkingNote.getContent().replace(TAG_UNCHECKED + " ",
+                        ""));
+            }
+            mNoteEditor.setText(getHighlightQueryResult(mWorkingNote.getContent(), mUserQuery));
+            mEditTextList.setVisibility(View.GONE);
+            mNoteEditor.setVisibility(View.VISIBLE);
+        }
+    }//如果新模式为列表模式，则调用switchToListMode()方法将便签编辑器的文本切换到列表模式，否则若是获取到文本就改变其检查标记，修改文本编辑器的内容和可见性
+
+    private boolean getWorkingText() {//获取当前活动便签的文本并保存到数据库中
+        boolean hasChecked = false;//初始化check标记
+        if (mWorkingNote.getCheckListMode() == TextNote.MODE_CHECK_LIST) {
+            StringBuilder sb = new StringBuilder();
+            for (int i = 0; i < mEditTextList.getChildCount(); i++) {
+                View view = mEditTextList.getChildAt(i);
+                NoteEditText edit = (NoteEditText) view.findViewById(R.id.et_edit_text);
+                if (!TextUtils.isEmpty(edit.getText())) {
+                    if (((CheckBox) view.findViewById(R.id.cb_edit_item)).isChecked()) {
+                        sb.append(TAG_CHECKED).append(" ").append(edit.getText()).append("\n");
+                        hasChecked = true;
+                    } else {
+                        sb.append(TAG_UNCHECKED).append(" ").append(edit.getText()).append("\n");
+                    }
+                }
+            }
+            mWorkingNote.setWorkingText(sb.toString());
+        } else {
+            mWorkingNote.setWorkingText(mNoteEditor.getText().toString());
+        }
+        return hasChecked;
+    }//如果当前工作便签为清单模式，转化为文字形式保存其数据否则直接保存文字数据到数据库中
+
+    private boolean saveNote() {//保存便签
+        getWorkingText();
+        boolean saved = mWorkingNote.saveNote();
+        if (saved) {
+            /**
+             * There are two modes from List view to edit view, open one note,
+             * create/edit a node. Opening node requires to the original
+             * position in the list when back from edit view, while creating a
+             * new node requires to the top of the list. This code
+             * {@link #RESULT_OK} is used to identify the create/edit state
+             */
+            setResult(RESULT_OK);
+        }
+        return saved;
+    }
+
+    private void sendToDesktop() {//将便签发送至桌面
+        /**
+         * Before send message to home, we should make sure that current
+         * editing note is exists in databases. So, for new note, firstly
+         * save it
+         */
+        if (!mWorkingNote.existInDatabase()) {
+            saveNote();
+        }//核对正编辑的便签是否存在于数据库中，若不存在，则先保存便签
+
+        if (mWorkingNote.getNoteId() > 0) {//若便签的id大于0，则执行以下程序
+            Intent sender = new Intent();
+            Intent shortcutIntent = new Intent(this, NoteEditActivity.class);
+            shortcutIntent.setAction(Intent.ACTION_VIEW);
+            shortcutIntent.putExtra(Intent.EXTRA_UID, mWorkingNote.getNoteId());
+            sender.putExtra(Intent.EXTRA_SHORTCUT_INTENT, shortcutIntent);
+            sender.putExtra(Intent.EXTRA_SHORTCUT_NAME,
+                    makeShortcutIconTitle(mWorkingNote.getContent()));
+            sender.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE,
+                    Intent.ShortcutIconResource.fromContext(this, R.drawable.icon_app));
+            sender.putExtra("duplicate", true);
+            sender.setAction("com.android.launcher.action.INSTALL_SHORTCUT");
+            showToast(R.string.info_note_enter_desktop);
+            sendBroadcast(sender);//建立发送到桌面的连接器 链接为一个视图 将便签的相关信息都添加到要发送的文件里 设置sneder的行为是发送
+        } else {//如果便签的id错误，则保存提醒用户
+            /**
+             * There is the condition that user has input nothing (the note is
+             * not worthy saving), we have no note id, remind the user that he
+             * should input something
+             */
+            Log.e(TAG, "Send to desktop error");
+            showToast(R.string.error_note_empty_for_send_to_desktop);
+        }
+    }
+
+    private String makeShortcutIconTitle(String content) {//编辑小图标的标题
+        content = content.replace(TAG_CHECKED, "");
+        content = content.replace(TAG_UNCHECKED, "");
+        return content.length() > SHORTCUT_ICON_TITLE_MAX_LEN ? content.substring(0,
+                SHORTCUT_ICON_TITLE_MAX_LEN) : content;
+    }//直接设置为content中的内容并返回，有勾选和未勾选2种
+
+    private void showToast(int resId) {
+        showToast(resId, Toast.LENGTH_SHORT);
+    }//显示提示的视图
+
+    private void showToast(int resId, int duration) {//持续显示提示的视图
+        Toast.makeText(this, resId, duration).show();
+    }
+}

doc/精读报告/ui/NoteEditText.doc

@@ -0,0 +1,221 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.ui;
+
+import android.content.Context;
+import android.graphics.Rect;
+import android.text.Layout;
+import android.text.Selection;
+import android.text.Spanned;
+import android.text.TextUtils;
+import android.text.style.URLSpan;
+import android.util.AttributeSet;
+import android.util.Log;
+import android.view.ContextMenu;
+import android.view.KeyEvent;
+import android.view.MenuItem;
+import android.view.MenuItem.OnMenuItemClickListener;
+import android.view.MotionEvent;
+import android.widget.EditText;
+
+import net.micode.notes.R;
+
+import java.util.HashMap;
+import java.util.Map;
+//继承edittext，设置便签设置文本框
+public class NoteEditText extends EditText {
+    private static final String TAG = "NoteEditText";
+    private int mIndex;
+    private int mSelectionStartBeforeDelete;
+
+    private static final String SCHEME_TEL = "tel:" ;
+    private static final String SCHEME_HTTP = "http:" ;
+    private static final String SCHEME_EMAIL = "mailto:" ;
+    //建立一个字符和整数的hash表，用于链接电话，网站，还有邮箱
+    private static final Map<String, Integer> sSchemaActionResMap = new HashMap<String, Integer>();
+    //一个字符串和文本的静态映射的哈希表，将字符串转化成文本内容，然后放在弹出文本框内
+    static {
+        sSchemaActionResMap.put(SCHEME_TEL, R.string.note_link_tel);
+        sSchemaActionResMap.put(SCHEME_HTTP, R.string.note_link_web);
+        sSchemaActionResMap.put(SCHEME_EMAIL, R.string.note_link_email);
+    }
+
+    /**
+     * Call by the {@link NoteEditActivity} to delete or add edit text
+     */
+    public interface OnTextViewChangeListener {//该接口用于实现对TextView组件中的文字信息进行修改
+        /**
+         * Delete current edit text when {@link KeyEvent#KEYCODE_DEL} happens
+         * and the text is null
+         */
+        void onEditTextDelete(int index, String text);//当delete键按下时删除当前编辑的文字块
+
+        /**
+         * Add edit text after current edit text when {@link KeyEvent#KEYCODE_ENTER}
+         * happen
+         */
+        void onEditTextEnter(int index, String text);//当enter键按下时添加一个文字编辑块
+
+        /**
+         * Hide or show item option when text change
+         */
+        void onTextChange(int index, boolean hasText);//当文字发生变化时隐藏或者显示设置
+    }
+
+    private OnTextViewChangeListener mOnTextViewChangeListener;//声明文本视图变化监听器
+
+    public NoteEditText(Context context) {//下面有三个构造函数，继承父类的方法，各个参数不同
+        super(context, null);
+        mIndex = 0;
+    }
+
+    public void setIndex(int index) {
+        mIndex = index;
+    }
+
+    public void setOnTextViewChangeListener(OnTextViewChangeListener listener) {
+        mOnTextViewChangeListener = listener;
+    }
+
+    public NoteEditText(Context context, AttributeSet attrs) {//下面两个函数都是NoteEditText的构造函数,它们同样继承了父类的构造函数,不同的是它们调用的参数不一样
+        super(context, attrs, android.R.attr.editTextStyle);
+    }
+
+    public NoteEditText(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        // TODO Auto-generated constructor stub
+    }
+
+    @Override
+    public boolean onTouchEvent(MotionEvent event) {
+        //触摸屏幕编辑便签时触发，参数event为手机屏幕触摸事件封装类的对象，其中封装了该事件的所有信息，例如触摸的位置、触摸的类型以及触摸的时间等。该对象会在用户触摸手机屏幕时被创
+        switch (event.getAction()) {
+            case MotionEvent.ACTION_DOWN://重写屏幕触发事件
+
+                int x = (int) event.getX();
+                int y = (int) event.getY();
+                x -= getTotalPaddingLeft();//减去左边控件的距离
+                y -= getTotalPaddingTop();
+                x += getScrollX();//加上滚轮滚过的距离
+                y += getScrollY();
+
+                Layout layout = getLayout();//用布局控件layout根据x,y的新值设置新的位置
+                int line = layout.getLineForVertical(y);
+                int off = layout.getOffsetForHorizontal(line, x);
+                Selection.setSelection(getText(), off);
+                break;
+        }
+
+        return super.onTouchEvent(event);//这是调用父类的方法，当屏幕有Touch事件时，此方法就会被调用
+    }
+
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        switch (keyCode) {
+            case KeyEvent.KEYCODE_ENTER:
+                if (mOnTextViewChangeListener != null) {
+                   //mOnTextViewChangeListener是上面接口OnTextViewChangeListener的引用，指向初始化时的listener对象，该对象是OnTextViewChangeListener的实现类的对象，接口无法直接实例化。mOnTextViewChangeListener标志着文本是否被改变。
+                    return false;
+                }
+                break;
+            case KeyEvent.KEYCODE_DEL:
+                mSelectionStartBeforeDelete = getSelectionStart();//获取删除文本开始位置
+                break;
+            default:
+                break;
+        }
+        return super.onKeyDown(keyCode, event);//调用父类的方法，响应其他按键，如数字键和字母键等
+    }
+
+    @Override
+    public boolean onKeyUp(int keyCode, KeyEvent event) {//处理用户松开一个键盘按键时会触发的事件
+        switch(keyCode) {
+            case KeyEvent.KEYCODE_DEL:
+                if (mOnTextViewChangeListener != null) {//如果文本视图发生变化
+                    if (0 == mSelectionStartBeforeDelete && mIndex != 0) {//若之前有被修改并且文档不为空
+                        mOnTextViewChangeListener.onEditTextDelete(mIndex, getText().toString());//监听文本的删除
+                        return true;
+                    }
+                } else {
+                    Log.d(TAG, "OnTextViewChangeListener was not seted");////其他情况报错，文档的改动监听器并没有建立
+                }
+                break;
+            case KeyEvent.KEYCODE_ENTER:
+                if (mOnTextViewChangeListener != null) {
+                    int selectionStart = getSelectionStart();////获取当前位置
+                    String text = getText().subSequence(selectionStart, length()).toString();//获取选择区域后面的文本信息
+                    setText(getText().subSequence(0, selectionStart));//根据获取的文本设置当前文本
+                    mOnTextViewChangeListener.onEditTextEnter(mIndex + 1, text);//将选择区域内的文字移到下一行
+                } else {
+                    Log.d(TAG, "OnTextViewChangeListener was not seted");//其他情况报错，监听器OnTextViewChangeListener并没有建立
+                }
+                break;
+            default:
+                break;
+        }
+        return super.onKeyUp(keyCode, event);//继续执行父类的其他按键弹起的事件
+    }
+
+    @Override
+    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {//当焦点发生变化时，会自动调用该方法来处理焦点改变的事件
+        if (mOnTextViewChangeListener != null) {
+            if (!focused && TextUtils.isEmpty(getText())) {
+                mOnTextViewChangeListener.onTextChange(mIndex, false);//mOnTextViewChangeListener子函数，置false隐藏事件选项
+            } else {
+                mOnTextViewChangeListener.onTextChange(mIndex, true);//mOnTextViewChangeListener子函数，置true显示事件选项
+
+            }
+        }
+        super.onFocusChanged(focused, direction, previouslyFocusedRect);//继续执行父类的其他焦点变化的事件
+    }
+
+    @Override
+    protected void onCreateContextMenu(ContextMenu menu) {//生成上下文菜单
+        if (getText() instanceof Spanned) {//如果有文本存在
+            int selStart = getSelectionStart();
+            int selEnd = getSelectionEnd();//获取文本开始和结尾位置
+
+            int min = Math.min(selStart, selEnd);
+            int max = Math.max(selStart, selEnd);//获取开始到结尾的最大、最小值
+
+            final URLSpan[] urls = ((Spanned) getText()).getSpans(min, max, URLSpan.class);//获取一段text内容，并且把这段内容强制转换为Spanned类型，并存入URLSpan数组urls中
+            if (urls.length == 1) {
+                int defaultResId = 0;
+                for(String schema: sSchemaActionResMap.keySet()) {
+                    if(urls[0].getURL().indexOf(schema) >= 0) {//若url可以添加则在添加后将defaultResId置为key所映射的值
+                        defaultResId = sSchemaActionResMap.get(schema);
+                        break;
+                    }
+                }
+
+                if (defaultResId == 0) {//defaultResId == 0则说明url并没有添加任何东西，所以置为连接其他SchemaActionResMap的值
+                    defaultResId = R.string.note_link_other;
+                }
+
+                menu.add(0, 0, 0, defaultResId).setOnMenuItemClickListener(
+                        new OnMenuItemClickListener() {
+                            public boolean onMenuItemClick(MenuItem item) {//如果点击菜单执行操作
+                                // goto a new intent
+                                urls[0].onClick(NoteEditText.this);//根据相应的文本设置菜单的按键
+                                return true;
+                            }
+                        });
+            }
+        }
+        super.onCreateContextMenu(menu);//继续执行父类的其他菜单创建的事件
+    }
+}