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/*
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* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package net.micode.notes.gtask.remote;
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import android.app.Notification;
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import android.app.NotificationManager;
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import android.app.PendingIntent;
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import android.content.Context;
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import android.content.Intent;
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import android.os.AsyncTask;
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import net.micode.notes.R;
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import net.micode.notes.ui.NotesListActivity;
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import net.micode.notes.ui.NotesPreferenceActivity;
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/**
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* GTaskASyncTask 类用于异步执行Google任务(GTask)同步操作。
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* 它继承自 AsyncTask,以便在后台线程中执行耗时的网络操作,
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* 并通过主线程更新用户界面或发送通知。
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*/
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public class GTaskASyncTask extends AsyncTask<Void, String, Integer> {
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// 用于同步操作的通知ID,确保唯一性。
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private static final int GTASK_SYNC_NOTIFICATION_ID = 5234235;
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/**
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* 当同步完成时调用的接口。
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*/
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public interface OnCompleteListener {
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void onComplete();
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}
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// 上下文对象,用于访问应用资源和系统服务。
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private Context mContext;
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// 管理通知的服务。
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private NotificationManager mNotifiManager;
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// 负责管理与Google任务交互的任务管理器。
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private GTaskManager mTaskManager;
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// 同步完成后调用的监听器。
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private OnCompleteListener mOnCompleteListener;
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/**
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* 构造一个新的 GTaskASyncTask 实例。
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* @param context 应用上下文。
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* @param listener 同步完成后的回调监听器。
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*/
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public GTaskASyncTask(Context context, OnCompleteListener listener) {
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mContext = context;
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mOnCompleteListener = listener;
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mNotifiManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
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mTaskManager = GTaskManager.getInstance();
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}
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/**
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* 取消正在进行的同步操作。
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*/
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public void cancelSync() {
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mTaskManager.cancelSync();
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}
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/**
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* 更新进度信息。
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* @param message 进度消息文本。
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*/
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public void publishProgess(String message) {
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publishProgress(new String[]{message});
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}
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/**
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* 显示一个通知给用户。
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* @param tickerId 通知栏提示文字的资源ID。
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* @param content 通知内容文本。
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*/
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private void showNotification(int tickerId, String content) {
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Notification notification = new Notification(R.drawable.notification,
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mContext.getString(tickerId),
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System.currentTimeMillis());
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notification.defaults = Notification.DEFAULT_LIGHTS;
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notification.flags = Notification.FLAG_AUTO_CANCEL;
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// 根据同步结果选择不同的PendingIntent
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PendingIntent pendingIntent;
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if (tickerId != R.string.ticker_success) {
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pendingIntent = PendingIntent.getActivity(mContext, 0,
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new Intent(mContext, NotesPreferenceActivity.class), 0);
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} else {
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pendingIntent = PendingIntent.getActivity(mContext, 0,
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new Intent(mContext, NotesListActivity.class), 0);
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}
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// 设置通知详情,并显示通知
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notification.setLatestEventInfo(mContext, mContext.getString(R.string.app_name), content, pendingIntent);
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mNotifiManager.notify(GTASK_SYNC_NOTIFICATION_ID, notification);
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}
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/**
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* 在后台线程中执行的实际同步逻辑。
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*/
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@Override
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protected Integer doInBackground(Void... unused) {
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// 发布登录进度信息
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publishProgess(mContext.getString(R.string.sync_progress_login,
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NotesPreferenceActivity.getSyncAccountName(mContext)));
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// 执行同步操作并返回状态码
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return mTaskManager.sync(mContext, this);
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}
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/**
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* 更新UI线程上的进度。
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*/
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@Override
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protected void onProgressUpdate(String... progress) {
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// 显示同步中的通知
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showNotification(R.string.ticker_syncing, progress[0]);
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// 如果上下文是GTaskSyncService,则广播进度信息
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if (mContext instanceof GTaskSyncService) {
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((GTaskSyncService) mContext).sendBroadcast(progress[0]);
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}
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}
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/**
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* 同步完成后,在UI线程上执行此方法。
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*/
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@Override
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protected void onPostExecute(Integer result) {
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// 根据同步结果显示不同通知
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switch(result) {
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case GTaskManager.STATE_SUCCESS:
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showNotification(R.string.ticker_success,
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mContext.getString(R.string.success_sync_account, mTaskManager.getSyncAccount()));
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NotesPreferenceActivity.setLastSyncTime(mContext, System.currentTimeMillis());
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break;
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case GTaskManager.STATE_NETWORK_ERROR:
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showNotification(R.string.ticker_fail,
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mContext.getString(R.string.error_sync_network));
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break;
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case GTaskManager.STATE_INTERNAL_ERROR:
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showNotification(R.string.ticker_fail,
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mContext.getString(R.string.error_sync_internal));
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break;
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case GTaskManager.STATE_SYNC_CANCELLED:
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showNotification(R.string.ticker_cancel,
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mContext.getString(R.string.error_sync_cancelled));
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break;
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}
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// 如果存在监听器,则启动新线程调用onComplete方法
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if (mOnCompleteListener != null) {
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new Thread(new Runnable() {
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@Override
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public void run() {
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mOnCompleteListener.onComplete();
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}
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}).start();
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}
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}
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}
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