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moneynewmoon 5 months ago
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GTaskClient.java
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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;
//导入Android账户相关类
import android.accounts.Account;
import android.accounts.AccountManager;
import android.accounts.AccountManagerFuture;
import android.app.Activity;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
//导入自定义数据结构和工具类
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;
// 导入Apache HttpClient相关类
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;
// JSON处理类
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
// Java IO相关类
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;
public class GTaskClient {
// 日志标签
private static final String TAG = GTaskClient.class.getSimpleName();
// Google Tasks API地址
private static final String GTASK_URL = "https://mail.google.com/tasks/";
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";
private static GTaskClient mInstance = null;
// HTTP客户端和相关配置
private DefaultHttpClient mHttpClient;// HTTP客户端实例
private String mGetUrl;
private String mPostUrl;
private long mClientVersion;
private boolean mLoggedin;
private long mLastLoginTime;
private int mActionId;
private Account mAccount;
private JSONArray mUpdateArray;
// 私有构造函数
private GTaskClient() {
mHttpClient = null;
mGetUrl = GTASK_GET_URL;
mPostUrl = GTASK_POST_URL;
mClientVersion = -1;
mLoggedin = false;
mLastLoginTime = 0;
mActionId = 1;
mAccount = null;
mUpdateArray = null;
}
// 获取单例实例
public static synchronized GTaskClient getInstance() {
if (mInstance == null) {
mInstance = new GTaskClient();
}
return mInstance;
}
public boolean login(Activity activity) {
// we suppose that the cookie would expire after 5 minutes
// then we need to re-login
// 检查登录有效期（5分钟）
final long interval = 1000 * 60 * 5;
if (mLastLoginTime + interval < System.currentTimeMillis()) {
mLoggedin = false;
// 超时需重新登录
}
// need to re-login after account switch
// 检查账户是否变更
if (mLoggedin
&& !TextUtils.equals(getSyncAccount().name, NotesPreferenceActivity
.getSyncAccountName(activity))) {
mLoggedin = false;
}
if (mLoggedin) {
Log.d(TAG, "already logged in");
return true;
}
// 更新最后登录时间
mLastLoginTime = System.currentTimeMillis();
// 获取Google账户授权令牌
String authToken = loginGoogleAccount(activity, false);
if (authToken == null) {
Log.e(TAG, "login google account failed");
return false;
}
// 处理自定义域名账户
// login with custom domain if necessary
if (!(mAccount.name.toLowerCase().endsWith("gmail.com") || mAccount.name.toLowerCase()
.endsWith("googlemail.com"))) {
// 构建自定义URL路径
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";
// 尝试登录自定义域名
if (tryToLoginGtask(activity, authToken)) {
mLoggedin = true;
}
}
// try to login with google official url
if (!mLoggedin) {
mGetUrl = GTASK_GET_URL;
mPostUrl = GTASK_POST_URL;
if (!tryToLoginGtask(activity, authToken)) {
return false;
}
}
mLoggedin = true;
return true;
}
private String loginGoogleAccount(Activity activity, boolean invalidateToken) {
String authToken;
// 账户管理器操作
AccountManager accountManager = AccountManager.get(activity);
Account[] accounts = accountManager.getAccountsByType("com.google");
// 无可用账户检查
if (accounts.length == 0) {
Log.e(TAG, "there is no available google account");
return null;
}
// 获取配置中的同步账户
String accountName = NotesPreferenceActivity.getSyncAccountName(activity);
Account account = null;
// 遍历匹配账户名称
for (Account a : accounts) {
if (a.name.equals(accountName)) {
account = a;
break;
}
}
if (account != null) {
// 设置当前账户
mAccount = account;
} else {
Log.e(TAG, "unable to get an account with the same name in the settings");
return null;
}
// get the token now
AccountManagerFuture<Bundle> accountManagerFuture = accountManager.getAuthToken(account,
"goanna_mobile", null, activity, null, null);
// 获取授权令牌
try {
Bundle authTokenBundle = accountManagerFuture.getResult();
authToken = authTokenBundle.getString(AccountManager.KEY_AUTHTOKEN);
// 需要失效旧令牌时重新获取
if (invalidateToken) {
accountManager.invalidateAuthToken("com.google", authToken);
loginGoogleAccount(activity, false);
}
} catch (Exception e) {
Log.e(TAG, "get auth token failed");
authToken = null;
}
return authToken;
}
private boolean tryToLoginGtask(Activity activity, String authToken) {
// 首次登录尝试
if (!loginGtask(authToken)) {
// maybe the auth token is out of date, now let's invalidate the
// token and try again
authToken = loginGoogleAccount(activity, true);
if (authToken == null) {
Log.e(TAG, "login google account failed");
return false;
}
// 使用新令牌再次尝试登录
if (!loginGtask(authToken)) {
Log.e(TAG, "login gtask failed");
return false;
}
}
return true;
}
private boolean loginGtask(String authToken) {
// 设置HTTP连接参数
int timeoutConnection = 10000;
int timeoutSocket = 15000;
HttpParams httpParameters = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);
// 初始化HTTP客户端
mHttpClient = new DefaultHttpClient(httpParameters);
BasicCookieStore localBasicCookieStore = new BasicCookieStore();
mHttpClient.setCookieStore(localBasicCookieStore);
HttpProtocolParams.setUseExpectContinue(mHttpClient.getParams(), false);
// login gtask
try {
// 构建带认证令牌的登录URL
String loginUrl = mGetUrl + "?auth=" + authToken;
HttpGet httpGet = new HttpGet(loginUrl);
HttpResponse response = null;
response = mHttpClient.execute(httpGet);
// get the cookie now
List<Cookie> cookies = mHttpClient.getCookieStore().getCookies();
boolean hasAuthCookie = false;
for (Cookie cookie : cookies) {
if (cookie.getName().contains("GTL")) {
hasAuthCookie = true;
}
}
if (!hasAuthCookie) {
Log.w(TAG, "it seems that there is no auth cookie");
}
// get the client version
// 解析响应内容获取客户端版本
String resString = getResponseContent(response.getEntity());
String jsBegin = "_setup(";
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);
mClientVersion = js.getLong("v");
} catch (JSONException e) {
Log.e(TAG, e.toString());
e.printStackTrace();
return false;
} catch (Exception e) {
// simply catch all exceptions
Log.e(TAG, "httpget gtask_url failed");
return false;
}
return true;
}
private int getActionId() {
return mActionId++;
}
private HttpPost createHttpPost() {
HttpPost httpPost = new HttpPost(mPostUrl);
// 设置请求头信息
httpPost.setHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");
httpPost.setHeader("AT", "1");
return httpPost;
}
private String getResponseContent(HttpEntity entity) throws IOException {
String contentEncoding = null;
if (entity.getContentEncoding() != null) {
contentEncoding = entity.getContentEncoding().getValue();
Log.d(TAG, "encoding: " + contentEncoding);
}
InputStream input = entity.getContent();
// 处理压缩内容
if (contentEncoding != null && contentEncoding.equalsIgnoreCase("gzip")) {
input = new GZIPInputStream(entity.getContent());
} else if (contentEncoding != null && contentEncoding.equalsIgnoreCase("deflate")) {
Inflater inflater = new Inflater(true);
input = new InflaterInputStream(entity.getContent(), inflater);
}
// 读取响应内容
try {
InputStreamReader isr = new InputStreamReader(input);
BufferedReader br = new BufferedReader(isr);
StringBuilder sb = new StringBuilder();
while (true) {
String buff = br.readLine();
if (buff == null) {
return sb.toString();
}
sb = sb.append(buff);
}
} finally {
input.close();
}
}
private JSONObject postRequest(JSONObject js) throws NetworkFailureException {
// 登录状态检查
if (!mLoggedin) {
Log.e(TAG, "please login first");
throw new ActionFailureException("not logged in");
}
HttpPost httpPost = createHttpPost();
try {
// 构建POST参数
LinkedList<BasicNameValuePair> list = new LinkedList<BasicNameValuePair>();
list.add(new BasicNameValuePair("r", js.toString()));
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list, "UTF-8");
httpPost.setEntity(entity);
// 执行请求并处理响应
// execute the post
HttpResponse response = mHttpClient.execute(httpPost);
String jsString = getResponseContent(response.getEntity());
return new JSONObject(jsString);
} catch (ClientProtocolException e) {
Log.e(TAG, e.toString());
e.printStackTrace();
throw new NetworkFailureException("postRequest failed");
} catch (IOException e) {
Log.e(TAG, e.toString());
e.printStackTrace();
throw new NetworkFailureException("postRequest failed");
} catch (JSONException e) {
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 {
commitUpdate();
// 提交暂存的更新
try {
JSONObject jsPost = new JSONObject();
JSONArray actionList = new JSONArray();
// 构建创建动作
// action_list
actionList.put(task.getCreateAction(getActionId()));
jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
// 添加客户端版本
// client_version
jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
// 发送请求并处理响应
// post
JSONObject jsResponse = postRequest(jsPost);
JSONObject jsResult = (JSONObject) jsResponse.getJSONArray(
GTaskStringUtils.GTASK_JSON_RESULTS).get(0);
task.setGid(jsResult.getString(GTaskStringUtils.GTASK_JSON_NEW_ID));
// 设置服务器生成ID
} catch (JSONException e) {
Log.e(TAG, e.toString());
e.printStackTrace();
throw new ActionFailureException("create task: handing jsonobject failed");
}
}
public void createTaskList(TaskList tasklist) throws NetworkFailureException {
commitUpdate();// 提交暂存的更新
try {
JSONObject jsPost = new JSONObject();
JSONArray actionList = new JSONArray();
// 构建创建动作
// action_list
actionList.put(tasklist.getCreateAction(getActionId()));
jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
// 添加客户端版本
// client version
jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
// 发送请求并处理响应
// post
JSONObject jsResponse = postRequest(jsPost);
JSONObject jsResult = (JSONObject) jsResponse.getJSONArray(
GTaskStringUtils.GTASK_JSON_RESULTS).get(0);
tasklist.setGid(jsResult.getString(GTaskStringUtils.GTASK_JSON_NEW_ID));// 设置服务器生成ID
} catch (JSONException e) {
Log.e(TAG, e.toString());
e.printStackTrace();
throw new ActionFailureException("create tasklist: handing jsonobject failed");
}
}
// 提交暂存的更新操作（批量执行队列中的更新）
public void commitUpdate() throws NetworkFailureException {
if (mUpdateArray != null) {
try {
JSONObject jsPost = new JSONObject();
// 设置操作列表字段（直接使用暂存的更新数组）
// action_list
jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, mUpdateArray);
// 添加客户端版本号
// client_version
jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
postRequest(jsPost);// 发送批量更新请求
mUpdateArray = null;// 清空更新队列
} catch (JSONException e) {
Log.e(TAG, e.toString());
e.printStackTrace();
throw new ActionFailureException("commit update: handing jsonobject failed");
}
}
}
// 向更新队列添加单个操作（自动处理批量限制）
public void addUpdateNode(Node node) throws NetworkFailureException {
if (node != null) {
// too many update items may result in an error
// set max to 10 items
// 限制更新队列最大长度为10（超过则先提交当前队列）
if (mUpdateArray != null && mUpdateArray.length() > 10) {
commitUpdate();// 提交当前队列// 初始化更新队列
}
if (mUpdateArray == null)// 初始化更新队列
mUpdateArray = new JSONArray();
// 添加节点的更新操作（调用Node对象生成操作JSON）
mUpdateArray.put(node.getUpdateAction(getActionId()));
}
}
// 移动任务到新位置（支持任务列表间移动和任务排序）
public void moveTask(Task task, TaskList preParent, TaskList curParent)
throws NetworkFailureException {
commitUpdate();// 先提交之前暂存的更新
try {
JSONObject jsPost = new JSONObject();
JSONArray actionList = new JSONArray();
JSONObject action = new JSONObject();// 创建移动操作JSON对象
// 设置操作类型为移动
// 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());
// 如果在同一任务列表内移动且非第一个任务，设置前置兄弟ID（用于排序）
if (preParent == curParent && task.getPriorSibling() != null) {
// 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());
}
// 设置源任务列表ID和目标父级ID（目标任务列表ID）
action.put(GTaskStringUtils.GTASK_JSON_SOURCE_LIST, preParent.getGid());
action.put(GTaskStringUtils.GTASK_JSON_DEST_PARENT, curParent.getGid());
// 如果跨任务列表移动，额外设置目标列表ID
if (preParent != curParent) {
// put the dest_list only if moving between tasklists
action.put(GTaskStringUtils.GTASK_JSON_DEST_LIST, curParent.getGid());
}
actionList.put(action); // 添加操作到列表
jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
// client_version
// 添加客户端版本号
jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
postRequest(jsPost);// 发送移动请求
} catch (JSONException e) {
Log.e(TAG, e.toString());
e.printStackTrace();
throw new ActionFailureException("move task: handing jsonobject failed");
}
}
// 删除任务或任务列表（标记为删除并提交更新）
public void deleteNode(Node node) throws NetworkFailureException {
commitUpdate();// 先提交之前暂存的更新
try {
JSONObject jsPost = new JSONObject();
JSONArray actionList = new JSONArray();
// 标记节点为已删除
// action_list
node.setDeleted(true);
// 添加删除操作
actionList.put(node.getUpdateAction(getActionId()));
jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
// 添加客户端版本号
// client_version
jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
postRequest(jsPost);
mUpdateArray = null;
} catch (JSONException e) {
Log.e(TAG, e.toString());
e.printStackTrace();
throw new ActionFailureException("delete node: handing jsonobject failed");
}
}
// 获取所有任务列表（从Google Tasks获取根任务列表数据）
public JSONArray getTaskLists() throws NetworkFailureException {
if (!mLoggedin) {// 未登录检查
Log.e(TAG, "please login first");
throw new ActionFailureException("not logged in");
}
try {
HttpGet httpGet = new HttpGet(mGetUrl);// 创建GET请求
HttpResponse response = null;
response = mHttpClient.execute(httpGet);
// 解析响应内容
// get the task list
String resString = getResponseContent(response.getEntity());
String jsBegin = "_setup(";
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);
// 提取任务列表数据
return js.getJSONObject("t").getJSONArray(GTaskStringUtils.GTASK_JSON_LISTS);
} catch (ClientProtocolException e) {
// HTTP协议异常
Log.e(TAG, e.toString());
e.printStackTrace();
throw new NetworkFailureException("gettasklists: httpget failed");
} catch (IOException e) {
// IO异常
Log.e(TAG, e.toString());
e.printStackTrace();
throw new NetworkFailureException("gettasklists: httpget failed");
} catch (JSONException e) {
// JSON解析异常
Log.e(TAG, e.toString());
e.printStackTrace();
throw new ActionFailureException("get task lists: handing jasonobject failed");
}
}
// 获取指定任务列表中的任务（支持获取未删除任务）
public JSONArray getTaskList(String listGid) throws NetworkFailureException {
commitUpdate();
try {
JSONObject jsPost = new JSONObject();
JSONArray actionList = new JSONArray();
JSONObject action = new JSONObject();
// 设置操作类型为获取所有任务
// action_list
action.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
GTaskStringUtils.GTASK_JSON_ACTION_TYPE_GETALL);
action.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, getActionId());
action.put(GTaskStringUtils.GTASK_JSON_LIST_ID, listGid);
action.put(GTaskStringUtils.GTASK_JSON_GET_DELETED, false);
actionList.put(action);// 添加操作到列表
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) {
Log.e(TAG, e.toString());
e.printStackTrace();
throw new ActionFailureException("get task list: handing jsonobject failed");
}
}
// 获取当前同步账户对象
public Account getSyncAccount() {
return mAccount;
}
// 重置更新队列（清空待提交的操作）
public void resetUpdateArray() {
mUpdateArray = null;
}
}

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/*
* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
*
* 授权协议：Apache License, 版本 2.0（"许可证"）；
* 除非遵守许可证，否则不得使用本文件。
* 您可以在以下网址获取许可证副本：
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 除非适用法律要求或书面同意，根据许可证分发的软件按"原样"提供，
* 不附带任何明示或暗示的保证或条件。请参阅许可证，了解具体的权限和限制。
*/
package net.micode.notes.gtask.remote;
import android.app.Activity;
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;
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 {
private static final String TAG = GTaskManager.class.getSimpleName();
// 同步状态：成功
public static final int STATE_SUCCESS = 0;
// 同步状态：网络错误
public static final int STATE_NETWORK_ERROR = 1;
// 同步状态：内部错误
public static final int STATE_INTERNAL_ERROR = 2;
// 同步状态：同步进行中
public static final int STATE_SYNC_IN_PROGRESS = 3;
// 同步状态：同步已取消
public static final int STATE_SYNC_CANCELLED = 4;
private static GTaskManager mInstance = null;
// 用于获取认证令牌的Activity
private Activity mActivity;
// 上下文环境
private Context mContext;
// 内容解析器
private ContentResolver mContentResolver;
// 同步进行中标志
private boolean mSyncing;
// 同步取消标志
private boolean mCancelled;
// 存储从Google获取的任务列表（键为GID）
private HashMap<String, TaskList> mGTaskListHashMap;
// 存储从Google获取的任务节点（键为GID）
private HashMap<String, Node> mGTaskHashMap;
// 存储元数据（键为关联的GID）
private HashMap<String, MetaData> mMetaHashMap;
// 元数据列表
private TaskList mMetaList;
// 本地已删除笔记的ID集合
private HashSet<Long> mLocalDeleteIdMap;
// GID到本地ID的映射
private HashMap<String, Long> mGidToNid;
// 本地ID到GID的映射
private HashMap<Long, String> mNidToGid;
private GTaskManager() {
mSyncing = false;
mCancelled = false;
mGTaskListHashMap = new HashMap<String, TaskList>();
mGTaskHashMap = new HashMap<String, Node>();
mMetaHashMap = new HashMap<String, MetaData>();
mMetaList = null;
mLocalDeleteIdMap = new HashSet<Long>();
mGidToNid = new HashMap<String, Long>();
mNidToGid = new HashMap<Long, String>();
}
// 获取单例实例
public static synchronized GTaskManager getInstance() {
if (mInstance == null) {
mInstance = new GTaskManager();
}
return mInstance;
}
// 设置Activity上下文（用于获取认证令牌）
public synchronized void setActivityContext(Activity activity) {
mActivity = activity;
}
// 执行同步操作
public int sync(Context context, GTaskASyncTask asyncTask) {
if (mSyncing) {
Log.d(TAG, "Sync is in progress");
return STATE_SYNC_IN_PROGRESS;
}
mContext = context;
mContentResolver = mContext.getContentResolver();
mSyncing = true;
mCancelled = false;
// 清空各类映射和集合
mGTaskListHashMap.clear();
mGTaskHashMap.clear();
mMetaHashMap.clear();
mLocalDeleteIdMap.clear();
mGidToNid.clear();
mNidToGid.clear();
try {
GTaskClient client = GTaskClient.getInstance();
client.resetUpdateArray();
// 登录Google任务
if (!mCancelled) {
if (!client.login(mActivity)) {
throw new NetworkFailureException("login google task failed");
}
}
// 从Google获取任务列表并初始化
asyncTask.publishProgess(mContext.getString(R.string.sync_progress_init_list));
initGTaskList();
// 执行内容同步
asyncTask.publishProgess(mContext.getString(R.string.sync_progress_syncing));
syncContent();
} catch (NetworkFailureException e) {
Log.e(TAG, e.toString());
return STATE_NETWORK_ERROR;
} catch (ActionFailureException e) {
Log.e(TAG, e.toString());
return STATE_INTERNAL_ERROR;
} catch (Exception e) {
Log.e(TAG, e.toString());
e.printStackTrace();
return STATE_INTERNAL_ERROR;
} finally {
// 清理资源
mGTaskListHashMap.clear();
mGTaskHashMap.clear();
mMetaHashMap.clear();
mLocalDeleteIdMap.clear();
mGidToNid.clear();
mNidToGid.clear();
mSyncing = false;
}
return mCancelled ? STATE_SYNC_CANCELLED : STATE_SUCCESS;
}
// 初始化Google任务列表
private void initGTaskList() throws NetworkFailureException {
if (mCancelled)
return;
GTaskClient client = GTaskClient.getInstance();
try {
JSONArray jsTaskLists = client.getTaskLists();
// 先初始化元数据列表
mMetaList = null;
for (int i = 0; i < jsTaskLists.length(); i++) {
JSONObject object = jsTaskLists.getJSONObject(i);
String gid = object.getString(GTaskStringUtils.GTASK_JSON_ID);
String name = object.getString(GTaskStringUtils.GTASK_JSON_NAME);
// 处理元数据文件夹
if (name.equals(GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_META)) {
mMetaList = new TaskList();
mMetaList.setContentByRemoteJSON(object);
// 加载元数据
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 (metaData.isWorthSaving()) {
mMetaList.addChildTask(metaData);
if (metaData.getGid() != null) {
mMetaHashMap.put(metaData.getRelatedGid(), metaData);
}
}
}
}
}
// 如果元数据列表不存在则创建
if (mMetaList == null) {
mMetaList = new TaskList();
mMetaList.setName(GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_META);
GTaskClient.getInstance().createTaskList(mMetaList);
}
// 初始化普通任务列表
for (int i = 0; i < jsTaskLists.length(); i++) {
JSONObject object = jsTaskLists.getJSONObject(i);
String gid = object.getString(GTaskStringUtils.GTASK_JSON_ID);
String name = object.getString(GTaskStringUtils.GTASK_JSON_NAME);
// 过滤系统文件夹并处理用户自定义文件夹
if (name.startsWith(GTaskStringUtils.MIUI_FOLDER_PREFFIX)
&& !name.equals(GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_META)) {
TaskList tasklist = new TaskList();
tasklist.setContentByRemoteJSON(object);
mGTaskListHashMap.put(gid, tasklist);
mGTaskHashMap.put(gid, tasklist);
// 加载任务列表中的任务
JSONArray jsTasks = client.getTaskList(gid);
for (int j = 0; j < jsTasks.length(); j++) {
object = (JSONObject) jsTasks.getJSONObject(j);
gid = object.getString(GTaskStringUtils.GTASK_JSON_ID);
Task task = new Task();
task.setContentByRemoteJSON(object);
if (task.isWorthSaving()) {
task.setMetaInfo(mMetaHashMap.get(gid));
tasklist.addChildTask(task);
mGTaskHashMap.put(gid, task);
}
}
}
}
} catch (JSONException e) {
Log.e(TAG, e.toString());
e.printStackTrace();
throw new ActionFailureException("initGTaskList: handing JSONObject failed");
}
}
// 同步内容（包括笔记和文件夹）
private void syncContent() throws NetworkFailureException {
int syncType;
Cursor c = null;
String gid;
Node node;
mLocalDeleteIdMap.clear();
if (mCancelled) {
return;
}
// 处理本地已删除的笔记（存在于回收站中）
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)
}, null);
if (c != null) {
while (c.moveToNext()) {
gid = c.getString(SqlNote.GTASK_ID_COLUMN);
node = mGTaskHashMap.get(gid);
if (node != null) {
mGTaskHashMap.remove(gid);
// 执行远程删除操作
doContentSync(Node.SYNC_ACTION_DEL_REMOTE, node, c);
}
mLocalDeleteIdMap.add(c.getLong(SqlNote.ID_COLUMN));
}
} else {
Log.w(TAG, "failed to query trash folder");
}
} finally {
if (c != null) {
c.close();
c = null;
}
}
// 先同步文件夹
syncFolder();
// 处理数据库中存在的普通笔记
try {
c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE,
"(type=? AND parent_id<>?)", new String[]{
String.valueOf(Notes.TYPE_NOTE), String.valueOf(Notes.ID_TRASH_FOLER)
}, NoteColumns.TYPE + " DESC");
if (c != null) {
while (c.moveToNext()) {
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));
mNidToGid.put(c.getLong(SqlNote.ID_COLUMN), gid);
syncType = node.getSyncAction(c);
} else {
if (c.getString(SqlNote.GTASK_ID_COLUMN).trim().length() == 0) {
// 本地新增笔记，需同步到远程
syncType = Node.SYNC_ACTION_ADD_REMOTE;
} else {
// 远程已删除，本地需删除
syncType = Node.SYNC_ACTION_DEL_LOCAL;
}
}
doContentSync(syncType, node, c);
}
} else {
Log.w(TAG, "failed to query existing note in database");
}
} finally {
if (c != null) {
c.close();
c = null;
}
}
// 处理剩余的远程任务（本地不存在的远程任务，需新增到本地）
Iterator<Map.Entry<String, Node>> iter = mGTaskHashMap.entrySet().iterator();
while (iter.hasNext()) {
Map.Entry<String, Node> entry = iter.next();
node = entry.getValue();
doContentSync(Node.SYNC_ACTION_ADD_LOCAL, node, null);
}
// 检查取消状态并清理本地删除记录
if (!mCancelled) {
if (!DataUtils.batchDeleteNotes(mContentResolver, mLocalDeleteIdMap)) {
throw new ActionFailureException("failed to batch-delete local deleted notes");
}
}
// 提交更新并刷新本地同步ID
if (!mCancelled) {
GTaskClient.getInstance().commitUpdate();
refreshLocalSyncId();
}
}
// 同步文件夹（包括系统文件夹和用户自定义文件夹）
private void syncFolder() throws NetworkFailureException {
Cursor c = null;
String gid;
Node node;
int syncType;
if (mCancelled) {
return;
}
// 处理根文件夹（系统文件夹）
try {
c = mContentResolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI,
Notes.ID_ROOT_FOLDER), SqlNote.PROJECTION_NOTE, null, null, null);
if (c != null) {
c.moveToNext();
gid = c.getString(SqlNote.GTASK_ID_COLUMN);
node = mGTaskHashMap.get(gid);
if (node != null) {
mGTaskHashMap.remove(gid);
mGidToNid.put(gid, (long) Notes.ID_ROOT_FOLDER);
mNidToGid.put((long) Notes.ID_ROOT_FOLDER, gid);
// 仅在名称变更时更新远程名称
if (!node.getName().equals(
GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_DEFAULT))
doContentSync(Node.SYNC_ACTION_UPDATE_REMOTE, node, c);
} else {
// 本地不存在，需新增到远程
doContentSync(Node.SYNC_ACTION_ADD_REMOTE, node, c);
}
} else {
Log.w(TAG, "failed to query root folder");
}
} finally {
if (c != null) {
c.close();
c = null;
}
}
// 处理通话记录文件夹（系统文件夹）
try {
c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE, "(_id=?)",
new String[]{
String.valueOf(Notes.ID_CALL_RECORD_FOLDER)
}, null);
if (c != null) {
if (c.moveToNext()) {
gid = c.getString(SqlNote.GTASK_ID_COLUMN);
node = mGTaskHashMap.get(gid);
if (node != null) {
mGTaskHashMap.remove(gid);
mGidToNid.put(gid, (long) Notes.ID_CALL_RECORD_FOLDER);
mNidToGid.put((long) Notes.ID_CALL_RECORD_FOLDER, gid);
// 仅在名称变更时更新远程名称
if (!node.getName().equals(
GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_CALL_NOTE))
doContentSync(Node.SYNC_ACTION_UPDATE_REMOTE, node, c);
} else {
// 本地不存在，需新增到远程
doContentSync(Node.SYNC_ACTION_ADD_REMOTE, node, c);
}
}
} else {
Log.w(TAG, "failed to query call note folder");
}
} finally {
if (c != null) {
c.close();
c = null;
}
}
// 处理用户自定义文件夹
try {
c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE,
"(type=? AND parent_id<>?)", new String[]{
String.valueOf(Notes.TYPE_FOLDER), String.valueOf(Notes.ID_TRASH_FOLER)
}, NoteColumns.TYPE + " DESC");
if (c != null) {
while (c.moveToNext()) {
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));
mNidToGid.put(c.getLong(SqlNote.ID_COLUMN), gid);
syncType = node.getSyncAction(c);
} else {
if (c.getString(SqlNote.GTASK_ID_COLUMN).trim().length() == 0) {
// 本地新增文件夹，需同步到远程
syncType = Node.SYNC_ACTION_ADD_REMOTE;
} else {
// 远程已删除，本地需删除
syncType = Node.SYNC_ACTION_DEL_LOCAL;
}
}
doContentSync(syncType, node, c);
}
} else {
Log.w(TAG, "failed to query existing folder");
}
} finally {
if (c != null) {
c.close();
c = null;
}
}
// 处理远程新增的文件夹（本地不存在的远程文件夹，需新增到本地）
Iterator<Map.Entry<String, TaskList>> iter = mGTaskListHashMap.entrySet().iterator();
while (iter.hasNext()) {
Map.Entry<String, TaskList> entry = iter.next();
gid = entry.getKey();
node = entry.getValue();
if (mGTaskHashMap.containsKey(gid)) {
mGTaskHashMap.remove(gid);
doContentSync(Node.SYNC_ACTION_ADD_LOCAL, node, null);
}
}
if (!mCancelled)
GTaskClient.getInstance().commitUpdate();
}
// 执行具体的内容同步操作
private void doContentSync(int syncType, Node node, Cursor c) throws NetworkFailureException {
if (mCancelled) {
return;
}
MetaData meta;
switch (syncType) {
case Node.SYNC_ACTION_ADD_LOCAL:
// 新增远程任务到本地
addLocalNode(node);
break;
case Node.SYNC_ACTION_ADD_REMOTE:
// 新增本地任务到远程
addRemoteNode(node, c);
break;
case Node.SYNC_ACTION_DEL_LOCAL:
// 删除本地任务（远程已删除）
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:
// 删除远程任务（本地已删除）
meta = mMetaHashMap.get(node.getGid());
if (meta != null) {
GTaskClient.getInstance().deleteNode(meta);
}
GTaskClient.getInstance().deleteNode(node);
break;
case Node.SYNC_ACTION_UPDATE_LOCAL:
// 更新本地任务（远程已修改）
updateLocalNode(node, c);
break;
case Node.SYNC_ACTION_UPDATE_REMOTE:
// 更新远程任务（本地已修改）
updateRemoteNode(node, c);
break;
case Node.SYNC_ACTION_UPDATE_CONFLICT:
// 冲突处理：使用本地修改覆盖远程
updateRemoteNode(node, c);
break;
case Node.SYNC_ACTION_NONE:
break;
case Node.SYNC_ACTION_ERROR:
default:
throw new ActionFailureException("unkown sync action type");
}
}
// 新增远程任务到本地数据库
private void addLocalNode(Node node) throws NetworkFailureException {
if (mCancelled) {
return;
}
SqlNote sqlNote;
if (node instanceof TaskList) {
// 处理系统文件夹
if (node.getName().equals(
GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_DEFAULT)) {
sqlNote = new SqlNote(mContext, Notes.ID_ROOT_FOLDER);
} else if (node.getName().equals(
GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_CALL_NOTE)) {
sqlNote = new SqlNote(mContext, Notes.ID_CALL_RECORD_FOLDER);
} else {
// 普通文件夹
sqlNote = new SqlNote(mContext);
sqlNote.setContent(node.getLocalJSONFromContent());
sqlNote.setParentId(Notes.ID_ROOT_FOLDER);
}
} else {
// 普通任务
sqlNote = new SqlNote(mContext);
JSONObject js = node.getLocalJSONFromContent();
try {
// 处理笔记ID冲突
if (js.has(GTaskStringUtils.META_HEAD_NOTE)) {
JSONObject note = js.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
if (note.has(NoteColumns.ID)) {
long id = note.getLong(NoteColumns.ID);
if (DataUtils.existInNoteDatabase(mContentResolver, id)) {
note.remove(NoteColumns.ID);
}
}
}
// 处理数据项ID冲突
if (js.has(GTaskStringUtils.META_HEAD_DATA)) {
JSONArray dataArray = js.getJSONArray(GTaskStringUtils.META_HEAD_DATA);
for (int i = 0; i < dataArray.length(); i++) {
JSONObject data = dataArray.getJSONObject(i);
if (data.has(DataColumns.ID)) {
long dataId = data.getLong(DataColumns.ID);
if (DataUtils.existInDataDatabase(mContentResolver, dataId)) {
data.remove(DataColumns.ID);
}
}
}
}
} catch (JSONException e) {
Log.w(TAG, e.toString());
e.printStackTrace();
}
sqlNote.setContent(js);
// 获取父文件夹ID
Long parentId = mGidToNid.get(((Task) node).getParent().getGid());
if (parentId == null) {
Log.e(TAG, "cannot find task's parent id locally");
throw new ActionFailureException("cannot add local node");
}
sqlNote.setParentId(parentId.longValue());
}
// 提交到本地数据库
sqlNote.setGtaskId(node.getGid());
sqlNote.commit(false);
// 更新ID映射
mGidToNid.put(node.getGid(), sqlNote.getId());
mNidToGid.put(sqlNote.getId(), node.getGid());
// 更新元数据
updateRemoteMeta(node.getGid(), sqlNote);
}
// 更新本地任务（基于远程数据）
private void updateLocalNode(Node node, Cursor c) throws NetworkFailureException {
if (mCancelled) {
return;
}
SqlNote sqlNote = new SqlNote(mContext, c);
sqlNote.setContent(node.getLocalJSONFromContent());
// 获取父文件夹ID
Long parentId = (node instanceof Task) ? mGidToNid.get(((Task) node).getParent().getGid())
: new Long(Notes.ID_ROOT_FOLDER);
if (parentId == null) {
Log.e(TAG, "cannot find task's parent id locally");
throw new ActionFailureException("cannot update local node");
}
sqlNote.setParentId(parentId.longValue());
sqlNote.commit(true);
// 更新元数据
updateRemoteMeta(node.getGid(), sqlNote);
}
// 新增本地任务到远程服务器
private void addRemoteNode(Node node, Cursor c) throws NetworkFailureException {
if (mCancelled) {
return;
}
SqlNote sqlNote = new SqlNote(mContext, c);
Node n;
// 处理普通笔记
if (sqlNote.isNoteType()) {
Task task = new Task();
task.setContentByLocalJSON(sqlNote.getContent());
// 获取父任务列表GID
String parentGid = mNidToGid.get(sqlNote.getParentId());
if (parentGid == null) {
Log.e(TAG, "cannot find task's parent tasklist");
throw new ActionFailureException("cannot add remote task");
}
mGTaskListHashMap.get(parentGid).addChildTask(task);
// 创建远程任务
GTaskClient.getInstance().createTask(task);
n = (Node) task;
// 添加元数据
updateRemoteMeta(task.getGid(), sqlNote);
} else {
// 处理文件夹
TaskList tasklist = null;
String folderName = GTaskStringUtils.MIUI_FOLDER_PREFFIX;
if (sqlNote.getId() == Notes.ID_ROOT_FOLDER)
folderName += GTaskStringUtils.FOLDER_DEFAULT;
else if (sqlNote.getId() == Notes.ID_CALL_RECORD_FOLDER)
folderName += GTaskStringUtils.FOLDER_CALL_NOTE;
else
folderName += sqlNote.getSnippet();
// 检查文件夹是否已存在
Iterator<Map.Entry<String, TaskList>> iter = mGTaskListHashMap.entrySet().iterator();
while (iter.hasNext()) {
Map.Entry<String, TaskList> entry = iter.next();
String gid = entry.getKey();
TaskList list = entry.getValue();
if (list.getName().equals(folderName)) {
tasklist = list;
if (mGTaskHashMap.containsKey(gid)) {
mGTaskHashMap.remove(gid);
}
break;
}
}
// 不存在则创建新文件夹
if (tasklist == null) {
tasklist = new TaskList();
tasklist.setContentByLocalJSON(sqlNote.getContent());
GTaskClient.getInstance().createTaskList(tasklist);
mGTaskListHashMap.put(tasklist.getGid(), tasklist);
}
n = (Node) tasklist;
}
// 更新本地笔记的GID
sqlNote.setGtaskId(n.getGid());
sqlNote.commit(false);
sqlNote.resetLocalModified();
sqlNote.commit(true);
// 更新ID映射
mGidToNid.put(n.getGid(), sqlNote.getId());
mNidToGid.put(sqlNote.getId(), n.getGid());
}
// 更新远程任务（基于本地数据）
private void updateRemoteNode(Node node, Cursor c) throws NetworkFailureException {
if (mCancelled) {
return;
}
SqlNote sqlNote = new SqlNote(mContext, c);
// 更新远程任务内容
node.setContentByLocalJSON(sqlNote.getContent());
GTaskClient.getInstance().addUpdateNode(node);
// 更新元数据
updateRemoteMeta(node.getGid(), sqlNote);
// 处理任务移动（如果父文件夹变更）
if (sqlNote.isNoteType()) {
Task task = (Task) node;
TaskList preParentList = task.getParent();
String curParentGid = mNidToGid.get(sqlNote.getParentId());
if (curParentGid == null) {
Log.e(TAG, "cannot find task's parent tasklist");
throw new ActionFailureException("cannot update remote task");
}
TaskList curParentList = mGTaskListHashMap.get(curParentGid);
if (preParentList != curParentList) {
preParentList.removeChildTask(task);
curParentList.addChildTask(task);
GTaskClient.getInstance().moveTask(task, preParentList, curParentList);
}
}
// 清除本地修改标志
sqlNote.resetLocalModified();
sqlNote.commit(true);
}
// 更新远程元数据
private void updateRemoteMeta(String gid, SqlNote sqlNote) throws NetworkFailureException {
if (sqlNote != null && sqlNote.isNoteType()) {
MetaData metaData = mMetaHashMap.get(gid);
if (metaData != null) {
metaData.setMeta(gid, sqlNote.getContent());
GTaskClient.getInstance().addUpdateNode(metaData);
} else {
metaData = new MetaData();
metaData.setMeta(gid, sqlNote.getContent());
mMetaList.addChildTask(metaData);
mMetaHashMap.put(gid, metaData);
GTaskClient.getInstance().createTask(metaData);
}
}
}
// 刷新本地同步ID（更新笔记的最后同步时间）
private void refreshLocalSyncId() throws NetworkFailureException {
if (mCancelled) {
return;
}
// 重新获取最新任务列表
mGTaskHashMap.clear();
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");
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();
values.put(NoteColumns.SYNC_ID, node.getLastModified());
// 更新本地同步ID
mContentResolver.update(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI,
c.getLong(SqlNote.ID_COLUMN)), values, null, null);
} else {
Log.e(TAG, "something is missed");
throw new ActionFailureException(
"some local items don't have gid after sync");
}
}
} else {
Log.w(TAG, "failed to query local note to refresh sync id");
}
} finally {
if (c != null) {
c.close();
c = null;
}
}
}
// 获取同步账户名
public String getSyncAccount() {
return GTaskClient.getInstance().getSyncAccount().name;
}
// 取消同步
public void cancelSync() {
mCancelled = true;
}
}

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/*
* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
*
* 版权声明：本文件由MiCode开源社区开发，遵循Apache License, Version 2.0协议；
* 您仅在遵守协议的前提下使用本文件，完整协议可通过以下链接获取：
* http://www.apache.org/licenses/LICENSE-2.0
* 注：未书面明确要求时，本软件按"原样"提供，不附带任何明示或暗示的保证。
*/
package net.micode.notes.gtask.remote;
import android.app.Activity;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.IBinder;
/**
* Google任务同步服务类（后台服务组件）
* 负责管理同步任务的启动、取消，并通过广播通知外部同步状态（如是否同步中、进度信息）
*/
public class GTaskSyncService extends Service {
// 服务意图中传递的动作类型键名
public final static String ACTION_STRING_NAME = "sync_action_type";
// 动作类型：启动同步
public final static int ACTION_START_SYNC = 0;
// 动作类型：取消同步
public final static int ACTION_CANCEL_SYNC = 1;
// 动作类型：无效操作
public final static int ACTION_INVALID = 2;
// 同步状态广播的Action名称（用于发送同步状态通知）
public final static String GTASK_SERVICE_BROADCAST_NAME = "net.micode.notes.gtask.remote.gtask_sync_service";
// 广播中传递的"是否正在同步"键名
public final static String GTASK_SERVICE_BROADCAST_IS_SYNCING = "isSyncing";
// 广播中传递的"进度消息"键名
public final static String GTASK_SERVICE_BROADCAST_PROGRESS_MSG = "progressMsg";
// 当前运行的异步同步任务实例（静态变量，全局唯一）
private static GTaskASyncTask mSyncTask = null;
// 当前同步进度的文本描述（静态变量，记录最新进度）
private static String mSyncProgress = "";
/**
* 启动同步任务（内部方法）
* 检查是否已有同步任务运行，若无则创建新任务并执行
*/
private void startSync() {
if (mSyncTask == null) { // 避免重复启动同步任务
// 创建异步任务实例，传入服务上下文和完成监听器
mSyncTask = new GTaskASyncTask(this, new GTaskASyncTask.OnCompleteListener() {
@Override
public void onComplete() {
// 同步完成后：清空任务实例 -> 发送广播 -> 停止服务自身
mSyncTask = null;
sendBroadcast(""); // 发送同步结束的广播（进度消息为空）
stopSelf(); // 停止当前服务
}
});
sendBroadcast(""); // 发送同步开始的广播（进度消息为空）
mSyncTask.execute(); // 执行异步同步任务（触发后台同步逻辑）
}
}
/**
* 取消当前同步任务（内部方法）
* 若存在运行中的同步任务，则调用其取消方法
*/
private void cancelSync() {
if (mSyncTask != null) {
mSyncTask.cancelSync(); // 触发异步任务的取消逻辑
}
}
/**
* 服务创建时的回调方法
* 初始化成员变量（确保服务启动时无残留任务）
*/
@Override
public void onCreate() {
mSyncTask = null; // 清空同步任务实例
}
/**
* 处理服务启动命令的回调方法
* 根据意图中传递的动作类型（启动/取消同步）执行对应操作
* @param intent 启动服务的意图（可能携带动作类型参数）
* @param flags 启动标志（如START_FLAG_REDELIVERY）
* @param startId 服务启动的唯一ID
* @return 服务重启策略（此处返回START_STICKY，意外终止后自动重启）
*/
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Bundle bundle = intent.getExtras(); // 获取意图携带的参数包
if (bundle != null && bundle.containsKey(ACTION_STRING_NAME)) {
// 根据动作类型执行操作
switch (bundle.getInt(ACTION_STRING_NAME, ACTION_INVALID)) {
case ACTION_START_SYNC: // 启动同步
startSync();
break;
case ACTION_CANCEL_SYNC: // 取消同步
cancelSync();
break;
default: // 无效动作，不处理
break;
}
return START_STICKY; // 服务意外终止后自动重启
}
return super.onStartCommand(intent, flags, startId);
}
/**
* 系统内存不足时的回调方法
* 释放资源，取消当前同步任务以避免内存溢出
*/
@Override
public void onLowMemory() {
if (mSyncTask != null) {
mSyncTask.cancelSync(); // 内存不足时强制取消同步任务
}
}
/**
* 绑定服务时的回调方法（本服务不支持绑定）
* @param intent 绑定意图
* @return 始终返回null（表示不支持绑定）
*/
public IBinder onBind(Intent intent) {
return null;
}
/**
* 发送同步状态广播（通知外部当前同步状态）
* @param msg 当前同步进度的文本描述（如"正在初始化任务列表..."）
*/
public void sendBroadcast(String msg) {
mSyncProgress = msg; // 更新全局进度信息
Intent intent = new Intent(GTASK_SERVICE_BROADCAST_NAME); // 创建广播意图
intent.putExtra(GTASK_SERVICE_BROADCAST_IS_SYNCING, mSyncTask != null); // 是否同步中（任务存在则为true）
intent.putExtra(GTASK_SERVICE_BROADCAST_PROGRESS_MSG, msg); // 传递进度消息
sendBroadcast(intent); // 发送广播
}
/**
* 静态方法：外部调用启动同步服务
* @param activity 启动服务的Activity上下文（用于设置GTaskManager的Activity引用）
*/
public static void startSync(Activity activity) {
GTaskManager.getInstance().setActivityContext(activity); // 设置GTaskManager的Activity（用于获取认证令牌）
Intent intent = new Intent(activity, GTaskSyncService.class); // 创建启动服务的意图
intent.putExtra(GTaskSyncService.ACTION_STRING_NAME, GTaskSyncService.ACTION_START_SYNC); // 传递启动同步动作
activity.startService(intent); // 启动服务
}
/**
* 静态方法：外部调用取消同步服务
* @param context 上下文（用于启动服务）
*/
public static void cancelSync(Context context) {
Intent intent = new Intent(context, GTaskSyncService.class); // 创建启动服务的意图
intent.putExtra(GTaskSyncService.ACTION_STRING_NAME, GTaskSyncService.ACTION_CANCEL_SYNC); // 传递取消同步动作
context.startService(intent); // 启动服务（触发取消逻辑）
}
/**
* 静态方法：检查当前是否正在同步
* @return true表示同步中，false表示未同步
*/
public static boolean isSyncing() {
return mSyncTask != null; // 通过任务实例是否存在判断
}
/**
* 静态方法：获取当前同步进度的文本描述
* @return 进度消息字符串（如"正在同步笔记..."）
*/
public static String getProgressString() {
return mSyncProgress; // 返回全局进度变量
}
}
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