diff --git a/src/net/micode/notes/gtask/exception/ActionFailureException.java b/src/net/micode/notes/gtask/exception/ActionFailureException.java index 15504be..81cbe31 100644 --- a/src/net/micode/notes/gtask/exception/ActionFailureException.java +++ b/src/net/micode/notes/gtask/exception/ActionFailureException.java @@ -14,15 +14,30 @@ * limitations under the License. */ +/* + * Description:支持小米便签运行过程中的运行异常处理。 + */ package net.micode.notes.gtask.exception; public class ActionFailureException extends RuntimeException { private static final long serialVersionUID = 4425249765923293627L; + /* + * serialVersionUID相当于java类的身份证。主要用于版本控制。 + * serialVersionUID作用是序列化时保持版本的兼容性,即在版本升级时反序列化仍保持对象的唯一性。 + * Made By Cuican + */ public ActionFailureException() { super(); } + /* + * 在JAVA类中使用super来引用父类的成分,用this来引用当前对象. + * 如果一个类从另外一个类继承,我们new这个子类的实例对象的时候,这个子类对象里面会有一个父类对象。 + * 怎么去引用里面的父类对象呢?使用super来引用 + * 也就是说,此处super()以及super (paramString)可认为是Exception ()和Exception (paramString) + * Made By Cuican + */ public ActionFailureException(String paramString) { super(paramString); } diff --git a/src/net/micode/notes/gtask/exception/NetworkFailureException.java b/src/net/micode/notes/gtask/exception/NetworkFailureException.java index b08cfb1..5322209 100644 --- a/src/net/micode/notes/gtask/exception/NetworkFailureException.java +++ b/src/net/micode/notes/gtask/exception/NetworkFailureException.java @@ -14,15 +14,30 @@ * limitations under the License. */ +/* + * Description:支持小米便签运行过程中的网络异常处理。 + */ package net.micode.notes.gtask.exception; public class NetworkFailureException extends Exception { private static final long serialVersionUID = 2107610287180234136L; + /* + * serialVersionUID相当于java类的身份证。主要用于版本控制。 + * serialVersionUID作用是序列化时保持版本的兼容性,即在版本升级时反序列化仍保持对象的唯一性。 + * Made By Cuican + */ public NetworkFailureException() { super(); } + /* + * 在JAVA类中使用super来引用父类的成分,用this来引用当前对象. + * 如果一个类从另外一个类继承,我们new这个子类的实例对象的时候,这个子类对象里面会有一个父类对象。 + * 怎么去引用里面的父类对象呢?使用super来引用 + * 也就是说,此处super()以及super (paramString)可认为是Exception ()和Exception (paramString) + * Made By Cuican + */ public NetworkFailureException(String paramString) { super(paramString); } diff --git a/src/net/micode/notes/gtask/remote/GTaskASyncTask.java b/src/net/micode/notes/gtask/remote/GTaskASyncTask.java index b3b61e7..f348211 100644 --- a/src/net/micode/notes/gtask/remote/GTaskASyncTask.java +++ b/src/net/micode/notes/gtask/remote/GTaskASyncTask.java @@ -16,7 +16,13 @@ */ package net.micode.notes.gtask.remote; - +/*异步操作类,实现GTask的异步操作过程 + * 主要方法: + * private void showNotification(int tickerId, String content) 向用户提示当前同步的状态,是一个用于交互的方法 + * protected Integer doInBackground(Void... unused) 此方法在后台线程执行,完成任务的主要工作,通常需要较长的时间 + * protected void onProgressUpdate(String... progress) 可以使用进度条增加用户体验度。 此方法在主线程执行,用于显示任务执行的进度。 + * protected void onPostExecute(Integer result) 相当于Handler 处理UI的方式,在这里面可以使用在doInBackground 得到的结果处理操作UI + */ import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; @@ -57,7 +63,7 @@ public class GTaskASyncTask extends AsyncTask { mTaskManager.cancelSync(); } - public void publishProgess(String message) { + public void publishProgess(String message) {// 发布进度单位,系统将会调用onProgressUpdate()方法更新这些值 publishProgress(new String[] { message }); @@ -66,39 +72,40 @@ public class GTaskASyncTask extends AsyncTask { private void showNotification(int tickerId, String content) { Notification notification = new Notification(R.drawable.notification, mContext .getString(tickerId), System.currentTimeMillis()); - notification.defaults = Notification.DEFAULT_LIGHTS; - notification.flags = Notification.FLAG_AUTO_CANCEL; - PendingIntent pendingIntent; + notification.defaults = Notification.DEFAULT_LIGHTS;// 调用系统自带灯光 + notification.flags = Notification.FLAG_AUTO_CANCEL;// 点击清除按钮或点击通知后会自动消失 + PendingIntent pendingIntent;//一个描述了想要启动一个Activity、Broadcast或是Service的意图 if (tickerId != R.string.ticker_success) { pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext, - NotesPreferenceActivity.class), 0); + NotesPreferenceActivity.class), 0);//一个描述了想要启动一个Activity、Broadcast或是Service的意图 } else { pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext, NotesListActivity.class), 0); + //如果同步成功,那么从系统取得一个用于启动一个NotesListActivity的PendingIntent对象 } notification.setLatestEventInfo(mContext, mContext.getString(R.string.app_name), content, pendingIntent); - mNotifiManager.notify(GTASK_SYNC_NOTIFICATION_ID, notification); + 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 protected Integer doInBackground(Void... unused) { publishProgess(mContext.getString(R.string.sync_progress_login, NotesPreferenceActivity - .getSyncAccountName(mContext))); - return mTaskManager.sync(mContext, this); + .getSyncAccountName(mContext)));//利用getString,将把 NotesPreferenceActivity.getSyncAccountName(mContext))的字符串内容传进sync_progress_login中 + return mTaskManager.sync(mContext, this);//进行后台同步具体操作 } @Override protected void onProgressUpdate(String... progress) { showNotification(R.string.ticker_syncing, progress[0]); - if (mContext instanceof GTaskSyncService) { + if (mContext instanceof GTaskSyncService) {//instanceof 判断mContext是否是GTaskSyncService的实例 ((GTaskSyncService) mContext).sendBroadcast(progress[0]); } } @Override - protected void onPostExecute(Integer result) { + protected void onPostExecute(Integer result) {//用于在执行完后台任务后更新UI,显示结果 if (result == GTaskManager.STATE_SUCCESS) { showNotification(R.string.ticker_success, mContext.getString( R.string.success_sync_account, mTaskManager.getSyncAccount())); @@ -110,13 +117,13 @@ public class GTaskASyncTask extends AsyncTask { } else if (result == GTaskManager.STATE_SYNC_CANCELLED) { showNotification(R.string.ticker_cancel, mContext .getString(R.string.error_sync_cancelled)); - } + }//几种不同情况下的结果显示 if (mOnCompleteListener != null) { new Thread(new Runnable() { - public void run() { mOnCompleteListener.onComplete(); } +//完成后的操作,使用onComplete()将所有值都重新初始化,相当于完成一次操作 }).start(); } } diff --git a/src/net/micode/notes/gtask/remote/GTaskClient.java b/src/net/micode/notes/gtask/remote/GTaskClient.java index c67dfdf..7219600 100644 --- a/src/net/micode/notes/gtask/remote/GTaskClient.java +++ b/src/net/micode/notes/gtask/remote/GTaskClient.java @@ -16,6 +16,10 @@ package net.micode.notes.gtask.remote; +/* + * 主要功能:实现GTASK的登录操作,进行GTASK任务的创建,创建任务列表,从网络上获取任务和任务列表的内容 + * 主要使用类或技术:accountManager JSONObject HttpParams authToken Gid + */ import android.accounts.Account; import android.accounts.AccountManager; import android.accounts.AccountManagerFuture; @@ -65,7 +69,7 @@ public class GTaskClient { private static final String TAG = GTaskClient.class.getSimpleName(); private static final String GTASK_URL = "https://mail.google.com/tasks/"; - + //这个是指定的URL private static final String GTASK_GET_URL = "https://mail.google.com/tasks/ig"; private static final String GTASK_POST_URL = "https://mail.google.com/tasks/r/ig"; @@ -102,6 +106,10 @@ public class GTaskClient { mUpdateArray = null; } + /*用来获取的实例化对象 + * 使用 getInstance() + * 返回mInstance这个实例化对象 + */ public static synchronized GTaskClient getInstance() { if (mInstance == null) { mInstance = new GTaskClient(); @@ -109,7 +117,14 @@ public class GTaskClient { return mInstance; } + /*用来实现登录操作的函数,传入的参数是一个Activity + * 设置登录操作限制时间,如果超时则需要重新登录 + * 有两种登录方式,使用用户自己的URL登录或者使用谷歌官方的URL登录 + * 返回true或者false,即最后是否登陆成功 + */ public boolean login(Activity activity) { + + //判断距离最后一次登录操作是否超过5分钟 // we suppose that the cookie would expire after 5 minutes // then we need to re-login final long interval = 1000 * 60 * 5; @@ -123,35 +138,39 @@ public class GTaskClient { .getSyncAccountName(activity))) { mLoggedin = false; } - + //如果没超过时间,则不需要重新登录 if (mLoggedin) { Log.d(TAG, "already logged in"); return true; } +//更新最后登录时间,改为系统当前的时间 mLastLoginTime = System.currentTimeMillis(); String authToken = loginGoogleAccount(activity, false); +//判断是否登录到谷歌账户 if (authToken == null) { Log.e(TAG, "login google account failed"); return false; } // login with custom domain if necessary + //尝试使用用户自己的域名登录 if (!(mAccount.name.toLowerCase().endsWith("gmail.com") || mAccount.name.toLowerCase() +//将用户账号名改为统一格式(小写)后判断是否为一个谷歌账号地址 .endsWith("googlemail.com"))) { StringBuilder url = new StringBuilder(GTASK_URL).append("a/"); int index = mAccount.name.indexOf('@') + 1; String suffix = mAccount.name.substring(index); url.append(suffix + "/"); - mGetUrl = url.toString() + "ig"; - mPostUrl = url.toString() + "r/ig"; + mGetUrl = url.toString() + "ig";//设置用户对应的getUrl + mPostUrl = url.toString() + "r/ig";//设置用户对应的postUrl if (tryToLoginGtask(activity, authToken)) { mLoggedin = true; } } - // try to login with google official url + //如果用户账户无法登录,则使用谷歌官方的URI进行登录 if (!mLoggedin) { mGetUrl = GTASK_GET_URL; mPostUrl = GTASK_POST_URL; @@ -163,12 +182,18 @@ public class GTaskClient { mLoggedin = true; return true; } - + /*具体实现登录谷歌账户的方法 + * 使用令牌机制 + * 使用AccountManager来管理注册账号 + * 返回值是账号的令牌 + */ private String loginGoogleAccount(Activity activity, boolean invalidateToken) { String authToken; + //令牌,是登录操作保证安全性的一个方法 AccountManager accountManager = AccountManager.get(activity); +//AccountManager这个类给用户提供了集中注册账号的接口 Account[] accounts = accountManager.getAccountsByType("com.google"); - +//获取全部以com.google结尾的account if (accounts.length == 0) { Log.e(TAG, "there is no available google account"); return null; @@ -176,6 +201,7 @@ public class GTaskClient { String accountName = NotesPreferenceActivity.getSyncAccountName(activity); Account account = null; + //遍历获得的accounts信息,寻找已经记录过的账户信息 for (Account a : accounts) { if (a.name.equals(accountName)) { account = a; @@ -188,13 +214,14 @@ public class GTaskClient { Log.e(TAG, "unable to get an account with the same name in the settings"); return null; } - + //获取选中账号的令牌 // get the token now AccountManagerFuture accountManagerFuture = accountManager.getAuthToken(account, "goanna_mobile", null, activity, null, null); try { Bundle authTokenBundle = accountManagerFuture.getResult(); authToken = authTokenBundle.getString(AccountManager.KEY_AUTHTOKEN); + //如果是invalidateToken,那么需要调用invalidateAuthToken(String, String)方法废除这个无效token if (invalidateToken) { accountManager.invalidateAuthToken("com.google", authToken); loginGoogleAccount(activity, false); @@ -206,11 +233,12 @@ public class GTaskClient { return authToken; } - + //尝试登陆Gtask,这只是一个预先判断令牌是否是有效以及是否能登上GTask的方法,而不是具体实现登陆的方法 private boolean tryToLoginGtask(Activity activity, String authToken) { if (!loginGtask(authToken)) { - // maybe the auth token is out of date, now let's invalidate the + // maybe the auth token is out of authTokedate, now let's invalidate the // token and try again + //删除过一个无效的authToken,申请一个新的后再次尝试登陆 authToken = loginGoogleAccount(activity, true); if (authToken == null) { Log.e(TAG, "login google account failed"); @@ -225,25 +253,33 @@ public class GTaskClient { return true; } + //实现登录GTask的具体操作 private boolean loginGtask(String authToken) { int timeoutConnection = 10000; int timeoutSocket = 15000; + //socket是一种通信连接实现数据的交换的端口 HttpParams httpParameters = new BasicHttpParams(); +//实例化一个新的HTTP参数类 HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection); +//设置连接超时时间 HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket); +//设置设置端口超时时间 mHttpClient = new DefaultHttpClient(httpParameters); BasicCookieStore localBasicCookieStore = new BasicCookieStore(); +//设置本地cookie mHttpClient.setCookieStore(localBasicCookieStore); HttpProtocolParams.setUseExpectContinue(mHttpClient.getParams(), false); // login gtask try { String loginUrl = mGetUrl + "?auth=" + authToken; +//设置登录的url HttpGet httpGet = new HttpGet(loginUrl); + //通过登录的uri实例化网页上资源的查找 HttpResponse response = null; response = mHttpClient.execute(httpGet); - // get the cookie now + //获取CookieStore里存放的cookie,看如果存有“GTL(不知道什么意思)”,则说明有验证成功的有效的cookie List cookies = mHttpClient.getCookieStore().getCookies(); boolean hasAuthCookie = false; for (Cookie cookie : cookies) { @@ -254,8 +290,7 @@ public class GTaskClient { if (!hasAuthCookie) { Log.w(TAG, "it seems that there is no auth cookie"); } - - // get the client version +//获取client的内容,具体操作是在返回的Content中截取从_setup(开始到)}中间的字符串内容,也就是gtask_url的内容 String resString = getResponseContent(response.getEntity()); String jsBegin = "_setup("; String jsEnd = ")}"; @@ -284,6 +319,10 @@ public class GTaskClient { return mActionId++; } + /*实例化创建一个用于向网络传输数据的对象 + * 使用HttpPost类 + * 返回一个httpPost实例化对象,但里面还没有内容 + */ private HttpPost createHttpPost() { HttpPost httpPost = new HttpPost(mPostUrl); httpPost.setHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8"); @@ -291,17 +330,24 @@ public class GTaskClient { return httpPost; } + /*通过URL获取响应后返回的数据,也就是网络上的数据和资源 + * 使用getContentEncoding()获取网络上的资源和数据 + * 返回值就是获取到的资源 + */ private String getResponseContent(HttpEntity entity) throws IOException { String contentEncoding = null; if (entity.getContentEncoding() != 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 contentEncoding = entity.getContentEncoding().getValue(); Log.d(TAG, "encoding: " + contentEncoding); } InputStream input = entity.getContent(); if (contentEncoding != null && contentEncoding.equalsIgnoreCase("gzip")) { +//GZIP是使用DEFLATE进行压缩数据的另一个压缩库 input = new GZIPInputStream(entity.getContent()); } else if (contentEncoding != null && contentEncoding.equalsIgnoreCase("deflate")) { +//DEFLATE是一个无专利的压缩算法,它可以实现无损数据压缩 Inflater inflater = new Inflater(true); input = new InflaterInputStream(entity.getContent(), inflater); } @@ -309,6 +355,7 @@ public class GTaskClient { try { InputStreamReader isr = new InputStreamReader(input); BufferedReader br = new BufferedReader(isr); +//是一个包装类,它可以包装字符流,将字符流放入缓存里,先把字符读到缓存里,到缓存满了时候,再读入内存,是为了提供读的效率而设计的 StringBuilder sb = new StringBuilder(); while (true) { @@ -322,20 +369,25 @@ public class GTaskClient { input.close(); } } - + /*通过JSON发送请求 + * 请求的具体内容在json的实例化对象js中然后传入 + * 利用UrlEncodedFormEntity entity和httpPost.setEntity(entity)方法把js中的内容放置到httpPost中 + * 执行请求后使用getResponseContent方法得到返回的数据和资源 + * 将资源再次放入json后返回 + */ private JSONObject postRequest(JSONObject js) throws NetworkFailureException { - if (!mLoggedin) { + if (!mLoggedin) {//未登录 Log.e(TAG, "please login first"); throw new ActionFailureException("not logged in"); } - + //实例化一个httpPost的对象用来向服务器传输数据,在这里就是发送请求,而请求的内容在js里 HttpPost httpPost = createHttpPost(); try { LinkedList list = new LinkedList(); list.add(new BasicNameValuePair("r", js.toString())); - UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list, "UTF-8"); + UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list, "UTF-8");//UrlEncodedFormEntity()的形式比较单一,是普通的键值对 httpPost.setEntity(entity); - + //执行这个请求 // execute the post HttpResponse response = mHttpClient.execute(httpPost); String jsString = getResponseContent(response.getEntity()); @@ -359,7 +411,12 @@ public class GTaskClient { throw new ActionFailureException("error occurs when posting request"); } } - + /*创建单个任务 + * 传入参数是一个.gtask.data.Task包里Task类的对象 + * 利用json获取Task里的内容,并且创建相应的jsPost + * 利用postRequest得到任务的返回信息 + * 使用task.setGid设置task的new_ID + */ public void createTask(Task task) throws NetworkFailureException { commitUpdate(); try { @@ -385,7 +442,9 @@ public class GTaskClient { throw new ActionFailureException("create task: handing jsonobject failed"); } } - + /* + * 创建一个任务列表,与createTask几乎一样,区别就是最后设置的是tasklist的gid + */ public void createTaskList(TaskList tasklist) throws NetworkFailureException { commitUpdate(); try { @@ -411,7 +470,11 @@ public class GTaskClient { throw new ActionFailureException("create tasklist: handing jsonobject failed"); } } - + /* + * 同步更新操作 + * 使用JSONObject进行数据存储,使用jsPost.put,Put的信息包括UpdateArray和ClientVersion + * 使用postRequest发送这个jspost,进行处理 + */ public void commitUpdate() throws NetworkFailureException { if (mUpdateArray != null) { try { @@ -432,7 +495,10 @@ public class GTaskClient { } } } - + /* + * 添加更新的事项 + * 调用commitUpdate()实现 + */ public void addUpdateNode(Node node) throws NetworkFailureException { if (node != null) { // too many update items may result in an error @@ -446,7 +512,12 @@ public class GTaskClient { mUpdateArray.put(node.getUpdateAction(getActionId())); } } - + /* + * 移动task,比如讲task移动到不同的task列表中去 + * 通过getGid获取task所属列表的gid + * 通过JSONObject.put(String name, Object value)函数设置移动后的task的相关属性值,从而达到移动的目的 + * 最后还是通过postRequest进行更新后的发送 + */ public void moveTask(Task task, TaskList preParent, TaskList curParent) throws NetworkFailureException { commitUpdate(); @@ -462,16 +533,17 @@ public class GTaskClient { action.put(GTaskStringUtils.GTASK_JSON_ID, task.getGid()); if (preParent == curParent && task.getPriorSibling() != null) { // put prioring_sibing_id only if moving within the tasklist and - // it is not the first one + //设置优先级ID,只有当移动是发生在文件中 action.put(GTaskStringUtils.GTASK_JSON_PRIOR_SIBLING_ID, task.getPriorSibling()); } - action.put(GTaskStringUtils.GTASK_JSON_SOURCE_LIST, preParent.getGid()); - action.put(GTaskStringUtils.GTASK_JSON_DEST_PARENT, curParent.getGid()); + action.put(GTaskStringUtils.GTASK_JSON_SOURCE_LIST, preParent.getGid());//设置移动前所属列表 + action.put(GTaskStringUtils.GTASK_JSON_DEST_PARENT, curParent.getGid());//设置当前所属列表 if (preParent != curParent) { // put the dest_list only if moving between tasklists action.put(GTaskStringUtils.GTASK_JSON_DEST_LIST, curParent.getGid()); } actionList.put(action); + //最后将ACTION_LIST加入到jsPost中 jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList); // client_version @@ -485,7 +557,11 @@ public class GTaskClient { throw new ActionFailureException("move task: handing jsonobject failed"); } } - + /* + * 删除操作节点 + * 还是利用JSON + * 删除过后使用postRequest发送删除后的结果 + */ public void deleteNode(Node node) throws NetworkFailureException { commitUpdate(); try { @@ -495,6 +571,7 @@ public class GTaskClient { // action_list node.setDeleted(true); actionList.put(node.getUpdateAction(getActionId())); +//这里会获取到删除操作的ID,加入到actionLiast中 jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList); // client_version @@ -508,7 +585,11 @@ public class GTaskClient { throw new ActionFailureException("delete node: handing jsonobject failed"); } } - + /* + * 获取任务列表 + * 首先通过GetURI使用getResponseContent从网上获取数据 + * 然后筛选出"_setup("到)}的部分,并且从中获取GTASK_JSON_LISTS的内容返回 + */ public JSONArray getTaskLists() throws NetworkFailureException { if (!mLoggedin) { Log.e(TAG, "please login first"); @@ -519,7 +600,7 @@ public class GTaskClient { HttpGet httpGet = new HttpGet(mGetUrl); HttpResponse response = null; response = mHttpClient.execute(httpGet); - + //筛选工作,把筛选出的字符串放入jsString // get the task list String resString = getResponseContent(response.getEntity()); String jsBegin = "_setup("; @@ -546,7 +627,9 @@ public class GTaskClient { throw new ActionFailureException("get task lists: handing jasonobject failed"); } } - + /* + * 通过传入的TASKList的gid,从网络上获取相应属于这个任务列表的任务 + */ public JSONArray getTaskList(String listGid) throws NetworkFailureException { commitUpdate(); try { @@ -559,6 +642,7 @@ public class GTaskClient { 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); @@ -578,7 +662,7 @@ public class GTaskClient { public Account getSyncAccount() { return mAccount; } - + //重置更新的内容 public void resetUpdateArray() { mUpdateArray = null; } diff --git a/src/net/micode/notes/gtask/remote/GTaskManager.java b/src/net/micode/notes/gtask/remote/GTaskManager.java index d2b4082..bbf73ce 100644 --- a/src/net/micode/notes/gtask/remote/GTaskManager.java +++ b/src/net/micode/notes/gtask/remote/GTaskManager.java @@ -49,6 +49,7 @@ import java.util.Map; public class GTaskManager { + private static final String TAG = GTaskManager.class.getSimpleName(); public static final int STATE_SUCCESS = 0; @@ -88,32 +89,55 @@ public class GTaskManager { private HashMap mNidToGid; private GTaskManager() { + //对象初始化函数 mSyncing = false; + //正在同步,flase代表未执行 mCancelled = false; + //全局标识,flase代表可以执行 mGTaskListHashMap = new HashMap(); + //<>代表Java的泛型,就是创建一个用类型作为参数的类。 mGTaskHashMap = new HashMap(); mMetaHashMap = new HashMap(); mMetaList = null; mLocalDeleteIdMap = new HashSet(); - mGidToNid = new HashMap(); - mNidToGid = new HashMap(); + mGidToNid = new HashMap(); //GoogleID to NodeID?? + mNidToGid = new HashMap(); //NodeID to GoogleID???通过hashmap散列表建立映射 } - + /** + * 包含关键字synchronized,语言级同步,指明该函数可能运行在多线程的环境下。 + * 功能:类初始化函数 + * @author TTS + * @return GtaskManger + */ public static synchronized GTaskManager getInstance() { + //可能运行在多线程环境下,使用语言级同步--synchronized if (mInstance == null) { mInstance = new GTaskManager(); } return mInstance; } - + /** + * 包含关键字synchronized,语言级同步,指明该函数可能运行在多线程的环境下。 + * @author TTS + * @param activity + */ public synchronized void setActivityContext(Activity activity) { // used for getting authtoken mActivity = activity; } - + /** + * 核心函数 + * 功能:实现了本地同步操作和远端同步操作 + * @author TTS + * @param context-----获取上下文 + * @param asyncTask-------用于同步的异步操作类 + * @return int + */ public int sync(Context context, GTaskASyncTask asyncTask) { + //核心函数 if (mSyncing) { Log.d(TAG, "Sync is in progress"); + //创建日志文件(调试信息),debug return STATE_SYNC_IN_PROGRESS; } mContext = context; @@ -128,9 +152,9 @@ public class GTaskManager { mNidToGid.clear(); try { - GTaskClient client = GTaskClient.getInstance(); + GTaskClient client = GTaskClient.getInstance();//getInstance即为创建一个实例,client--客户机 client.resetUpdateArray(); - +//JSONArray类型,reset即置为NULL // login google task if (!mCancelled) { if (!client.login(mActivity)) { @@ -141,14 +165,17 @@ public class GTaskManager { // get the task list from google asyncTask.publishProgess(mContext.getString(R.string.sync_progress_init_list)); initGTaskList(); - + //获取Google上的JSONtasklist转为本地TaskList // do content sync work asyncTask.publishProgess(mContext.getString(R.string.sync_progress_syncing)); syncContent(); } catch (NetworkFailureException e) { + //分为两种异常,此类异常为网络异常 Log.e(TAG, e.toString()); + //创建日志文件(调试信息),error return STATE_NETWORK_ERROR; } catch (ActionFailureException e) { + //此类异常为操作异常 Log.e(TAG, e.toString()); return STATE_INTERNAL_ERROR; } catch (Exception e) { @@ -167,32 +194,43 @@ public class GTaskManager { return mCancelled ? STATE_SYNC_CANCELLED : STATE_SUCCESS; } - + /** + *功能:初始化GtaskList,获取Google上的JSONtasklist转为本地TaskList。 + *获得的数据存储在mMetaList,mGTaskListHashMap,mGTaskHashMap + *@author TTS + *@exception NetworkFailureException + *@return void + */ private void initGTaskList() throws NetworkFailureException { if (mCancelled) return; GTaskClient client = GTaskClient.getInstance(); +//getInstance即为创建一个实例,client应指远端客户机 try { + //Json对象是Name Value对(即子元素)的无序集合,相当于一个Map对象。JsonObject类是bantouyan-json库对Json对象的抽象,提供操纵Json对象的各种方法。 + //其格式为{"key1":value1,"key2",value2....};key 必须是字符串。 + //因为ajax请求不刷新页面,但配合js可以实现局部刷新,因此json常常被用来作为异步请求的返回对象使用。 JSONArray jsTaskLists = client.getTaskLists(); // init meta list first mMetaList = null; for (int i = 0; i < jsTaskLists.length(); i++) { - JSONObject object = jsTaskLists.getJSONObject(i); + JSONObject object = jsTaskLists.getJSONObject(i);//JSONObject与JSONArray一个为对象,一个为数组。此处取出单个JASONObject String gid = object.getString(GTaskStringUtils.GTASK_JSON_ID); String name = object.getString(GTaskStringUtils.GTASK_JSON_NAME); if (name .equals(GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_META)) { - mMetaList = new TaskList(); + mMetaList = new TaskList(); //MetaList意为元表,Tasklist类型,此处为初始化 mMetaList.setContentByRemoteJSON(object); - + //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... // load meta data JSONArray jsMetas = client.getTaskList(gid); for (int j = 0; j < jsMetas.length(); j++) { object = (JSONObject) jsMetas.getJSONObject(j); MetaData metaData = new MetaData(); metaData.setContentByRemoteJSON(object); + //if not worth to save,metadata将不加入mMetaList if (metaData.isWorthSaving()) { mMetaList.addChildTask(metaData); if (metaData.getGid() != null) { @@ -215,16 +253,17 @@ public class GTaskManager { for (int i = 0; i < jsTaskLists.length(); i++) { JSONObject object = jsTaskLists.getJSONObject(i); 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); if (name.startsWith(GTaskStringUtils.MIUI_FOLDER_PREFFIX) && !name.equals(GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_META)) { - TaskList tasklist = new TaskList(); + TaskList tasklist = new TaskList();//继承自Node tasklist.setContentByRemoteJSON(object); mGTaskListHashMap.put(gid, tasklist); mGTaskHashMap.put(gid, tasklist); - + //加两遍 // load tasks JSONArray jsTasks = client.getTaskList(gid); for (int j = 0; j < jsTasks.length(); j++) { @@ -246,14 +285,20 @@ public class GTaskManager { throw new ActionFailureException("initGTaskList: handing JSONObject failed"); } } - + /** + * 功能:本地内容同步操作 + * @throws NetworkFailureException + * @return 无返回值 + */ private void syncContent() throws NetworkFailureException { + //本地内容同步操作 int syncType; Cursor c = null; - String gid; - Node node; + //数据库指针 + String gid; //GoogleID + Node node; //Node包含Sync_Action的不同类型 - mLocalDeleteIdMap.clear(); + mLocalDeleteIdMap.clear();//HashSet类型 if (mCancelled) { return; @@ -301,8 +346,8 @@ public class GTaskManager { node = mGTaskHashMap.get(gid); if (node != null) { mGTaskHashMap.remove(gid); - mGidToNid.put(gid, c.getLong(SqlNote.ID_COLUMN)); - mNidToGid.put(c.getLong(SqlNote.ID_COLUMN), gid); + mGidToNid.put(gid, c.getLong(SqlNote.ID_COLUMN));//通过hashmap建立联系 + mNidToGid.put(c.getLong(SqlNote.ID_COLUMN), gid); //通过hashmap建立联系 syncType = node.getSyncAction(c); } else { if (c.getString(SqlNote.GTASK_ID_COLUMN).trim().length() == 0) { @@ -350,7 +395,11 @@ public class GTaskManager { } } - + /** + * 功能: + * @author TTS + * @throws NetworkFailureException + */ private void syncFolder() throws NetworkFailureException { Cursor c = null; String gid; @@ -475,7 +524,14 @@ public class GTaskManager { if (!mCancelled) GTaskClient.getInstance().commitUpdate(); } - + /** + * 功能:syncType分类,addLocalNode,addRemoteNode,deleteNode,updateLocalNode,updateRemoteNode + * @author TTS + * @param syncType + * @param node + * @param c + * @throws NetworkFailureException + */ private void doContentSync(int syncType, Node node, Cursor c) throws NetworkFailureException { if (mCancelled) { return; @@ -521,7 +577,12 @@ public class GTaskManager { throw new ActionFailureException("unkown sync action type"); } } - + /** + * 功能:本地增加Node + * @author TTS + * @param node + * @throws NetworkFailureException + */ private void addLocalNode(Node node) throws NetworkFailureException { if (mCancelled) { return; @@ -595,7 +656,15 @@ public class GTaskManager { // update meta updateRemoteMeta(node.getGid(), sqlNote); } - + /** + * 功能:update本地node + * @author TTS + * @param node + * ----同步操作的基础数据类型 + * @param c + * ----Cursor + * @throws NetworkFailureException + */ private void updateLocalNode(Node node, Cursor c) throws NetworkFailureException { if (mCancelled) { return; @@ -618,13 +687,22 @@ public class GTaskManager { // update meta info updateRemoteMeta(node.getGid(), sqlNote); } - + /** + * 功能:远程增加Node + * 需要updateRemoteMeta + * @author TTS + * @param node + * ----同步操作的基础数据类型 + * @param c + * --Cursor + * @throws NetworkFailureException + */ private void addRemoteNode(Node node, Cursor c) throws NetworkFailureException { if (mCancelled) { return; } - SqlNote sqlNote = new SqlNote(mContext, c); + SqlNote sqlNote = new SqlNote(mContext, c); //从本地mContext中获取内容 Node n; // update remotely @@ -634,11 +712,11 @@ public class GTaskManager { String parentGid = mNidToGid.get(sqlNote.getParentId()); if (parentGid == null) { - Log.e(TAG, "cannot find task's parent tasklist"); + Log.e(TAG, "cannot find task's parent tasklist");//调试信息 throw new ActionFailureException("cannot add remote task"); } - mGTaskListHashMap.get(parentGid).addChildTask(task); - + mGTaskListHashMap.get(parentGid).addChildTask(task); //在本地生成的GTaskList中增加子结点 +//登录远程服务器,创建Task GTaskClient.getInstance().createTask(task); n = (Node) task; @@ -655,7 +733,7 @@ public class GTaskManager { folderName += GTaskStringUtils.FOLDER_CALL_NOTE; else folderName += sqlNote.getSnippet(); - + //iterator迭代器,通过统一的接口迭代所有的map元素 Iterator> iter = mGTaskListHashMap.entrySet().iterator(); while (iter.hasNext()) { Map.Entry entry = iter.next(); @@ -687,11 +765,19 @@ public class GTaskManager { sqlNote.resetLocalModified(); sqlNote.commit(true); - // gid-id mapping + // gid-id mapping //创建id间的映射 mGidToNid.put(n.getGid(), sqlNote.getId()); mNidToGid.put(sqlNote.getId(), n.getGid()); } - + /** + * 功能:更新远端的Node,包含meta更新(updateRemoteMeta) + * @author TTS + * @param node + * ----同步操作的基础数据类型 + * @param c + * --Cursor + * @throws NetworkFailureException + */ private void updateRemoteNode(Node node, Cursor c) throws NetworkFailureException { if (mCancelled) { return; @@ -701,7 +787,7 @@ public class GTaskManager { // update remotely node.setContentByLocalJSON(sqlNote.getContent()); - GTaskClient.getInstance().addUpdateNode(node); + GTaskClient.getInstance().addUpdateNode(node);//GTaskClient用途为从本地登陆远端服务器 // update meta updateRemoteMeta(node.getGid(), sqlNote); @@ -710,14 +796,14 @@ public class GTaskManager { if (sqlNote.isNoteType()) { Task task = (Task) node; TaskList preParentList = task.getParent(); - +//preParentList为通过node获取的父节点列表 String curParentGid = mNidToGid.get(sqlNote.getParentId()); - if (curParentGid == null) { +//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) { Log.e(TAG, "cannot find task's parent tasklist"); throw new ActionFailureException("cannot update remote task"); } TaskList curParentList = mGTaskListHashMap.get(curParentGid); - +//通过HashMap找到对应Gid的TaskList if (preParentList != curParentList) { preParentList.removeChildTask(task); curParentList.addChildTask(task); @@ -727,9 +813,18 @@ public class GTaskManager { // clear local modified flag sqlNote.resetLocalModified(); + //commit到本地数据库 sqlNote.commit(true); } - + /** + * 功能:升级远程meta。 meta---元数据----计算机文件系统管理数据---管理数据的数据。 + * @author TTS + * @param gid + * ---GoogleID为String类型 + * @param sqlNote + * ---同步前的数据库操作,故使用类SqlNote + * @throws NetworkFailureException + */ private void updateRemoteMeta(String gid, SqlNote sqlNote) throws NetworkFailureException { if (sqlNote != null && sqlNote.isNoteType()) { MetaData metaData = mMetaHashMap.get(gid); @@ -745,13 +840,18 @@ public class GTaskManager { } } } - + /** + * 功能:刷新本地,给sync的ID对应上最后更改过的对象 + * @author TTS + * @return void + * @throws NetworkFailureException + */ private void refreshLocalSyncId() throws NetworkFailureException { if (mCancelled) { return; } - // get the latest gtask list + // get the latest gtask list //获取最近的(最晚的)gtask list mGTaskHashMap.clear(); mGTaskListHashMap.clear(); mMetaHashMap.clear(); @@ -762,16 +862,16 @@ public class GTaskManager { 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"); + }, 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。new String[] {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()) { String gid = c.getString(SqlNote.GTASK_ID_COLUMN); Node node = mGTaskHashMap.get(gid); if (node != null) { mGTaskHashMap.remove(gid); - ContentValues values = new ContentValues(); + ContentValues values = new ContentValues();//在ContentValues中创建键值对。准备通过contentResolver写入数据 values.put(NoteColumns.SYNC_ID, node.getLastModified()); - mContentResolver.update(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, + mContentResolver.update(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI,//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。 c.getLong(SqlNote.ID_COLUMN)), values, null, null); } else { Log.e(TAG, "something is missed"); @@ -789,11 +889,18 @@ public class GTaskManager { } } } - + /** + * 功能:获取同步账号,mAccount.name + * @author TTS + * @return String + */ public String getSyncAccount() { return GTaskClient.getInstance().getSyncAccount().name; } - + /** + * 功能:取消同步,置mCancelled为true + * @author TTS + */ public void cancelSync() { mCancelled = true; } diff --git a/src/net/micode/notes/gtask/remote/GTaskSyncService.java b/src/net/micode/notes/gtask/remote/GTaskSyncService.java index cca36f7..71d93e4 100644 --- a/src/net/micode/notes/gtask/remote/GTaskSyncService.java +++ b/src/net/micode/notes/gtask/remote/GTaskSyncService.java @@ -15,7 +15,21 @@ */ package net.micode.notes.gtask.remote; - +/* + * 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 + * 主要方法: + * private void startSync() 启动一个同步工作 + * private void cancelSync() 取消同步 + * public void onCreate() + * public int onStartCommand(Intent intent, int flags, int startId) service生命周期的组成部分,相当于重启service(比如在被暂停之后),而不是创建一个新的service + * public void onLowMemory() 在没有内存的情况下如果存在service则结束掉这的service + * public IBinder onBind() + * public void sendBroadcast(String msg) 发送同步的相关通知 + * public static void startSync(Activity activity) + * public static void cancelSync(Context context) + * public static boolean isSyncing() 判读是否在进行同步 + * public static String getProgressString() 获取当前进度的信息 + */ import android.app.Activity; import android.app.Service; import android.content.Context; @@ -41,7 +55,7 @@ public class GTaskSyncService extends Service { private static GTaskASyncTask mSyncTask = null; private static String mSyncProgress = ""; - + //开始一个同步的工作 private void startSync() { if (mSyncTask == null) { mSyncTask = new GTaskASyncTask(this, new GTaskASyncTask.OnCompleteListener() { @@ -52,7 +66,7 @@ public class GTaskSyncService extends Service { } }); sendBroadcast(""); - mSyncTask.execute(); + mSyncTask.execute();//这个函数让任务是以单线程队列方式或线程池队列方式运行 } } @@ -63,7 +77,7 @@ public class GTaskSyncService extends Service { } @Override - public void onCreate() { + public void onCreate() {//初始化一个service mSyncTask = null; } @@ -72,6 +86,7 @@ public class GTaskSyncService extends Service { Bundle bundle = intent.getExtras(); if (bundle != null && bundle.containsKey(ACTION_STRING_NAME)) { switch (bundle.getInt(ACTION_STRING_NAME, ACTION_INVALID)) { +//两种情况,开始同步或者取消同步 case ACTION_START_SYNC: startSync(); break; @@ -81,7 +96,7 @@ public class GTaskSyncService extends Service { default: break; } - return START_STICKY; + return START_STICKY;//等待新的intent来是这个service继续运行 } return super.onStartCommand(intent, flags, startId); } @@ -99,20 +114,20 @@ public class GTaskSyncService extends Service { public void sendBroadcast(String msg) { mSyncProgress = msg; - Intent intent = new Intent(GTASK_SERVICE_BROADCAST_NAME); - intent.putExtra(GTASK_SERVICE_BROADCAST_IS_SYNCING, mSyncTask != null); + 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); + sendBroadcast(intent);//发送这个通知 } - public static void startSync(Activity activity) { + public static void startSync(Activity activity) {//执行一个service,service的内容里的同步动作就是开始同步 GTaskManager.getInstance().setActivityContext(activity); Intent intent = new Intent(activity, GTaskSyncService.class); intent.putExtra(GTaskSyncService.ACTION_STRING_NAME, GTaskSyncService.ACTION_START_SYNC); activity.startService(intent); } - public static void cancelSync(Context context) { + public static void cancelSync(Context context) {//执行一个service,service的内容里的同步动作就是取消同步 Intent intent = new Intent(context, GTaskSyncService.class); intent.putExtra(GTaskSyncService.ACTION_STRING_NAME, GTaskSyncService.ACTION_CANCEL_SYNC); context.startService(intent);