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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.ui;
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import android.app.AlarmManager;
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import android.app.PendingIntent;
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import android.content.BroadcastReceiver;
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import android.content.ContentUris;
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import android.content.Context;
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import android.content.Intent;
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import android.database.Cursor;
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import net.micode.notes.data.Notes;
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import net.micode.notes.data.Notes.NoteColumns;
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// ... existing code ...
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/**
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* 闹钟初始化广播接收器
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*
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* 【功能说明】
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* 1. 在系统启动或应用重启时恢复所有未触发的闹钟
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* 2. 查询数据库中所有设置了提醒日期且尚未到期的笔记
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* 3. 为每个笔记重新注册系统闹钟服务
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*/
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public class AlarmInitReceiver extends BroadcastReceiver {
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// 查询投影：只需要ID和提醒日期两个字段
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private static final String [] PROJECTION = new String [] {
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NoteColumns.ID,
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NoteColumns.ALERTED_DATE
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};
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private static final int COLUMN_ID = 0;
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private static final int COLUMN_ALERTED_DATE = 1;
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@Override
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public void onReceive(Context context, Intent intent) {
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long currentDate = System.currentTimeMillis();
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// 查询所有提醒日期大于当前时间且类型为普通笔记的记录
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Cursor c = context.getContentResolver().query(Notes.CONTENT_NOTE_URI,
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PROJECTION,
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NoteColumns.ALERTED_DATE + ">? AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE,
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new String[] { String.valueOf(currentDate) },
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null);
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if (c != null) {
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if (c.moveToFirst()) {
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do {
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long alertDate = c.getLong(COLUMN_ALERTED_DATE);
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// 创建用于触发闹钟的Intent
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Intent sender = new Intent(context, AlarmReceiver.class);
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sender.setData(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, c.getLong(COLUMN_ID)));
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PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, sender, 0);
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// 获取系统闹钟管理器并设置闹钟
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AlarmManager alermManager = (AlarmManager) context
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.getSystemService(Context.ALARM_SERVICE);
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alermManager.set(AlarmManager.RTC_WAKEUP, alertDate, pendingIntent);
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} while (c.moveToNext());
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}
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c.close();
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}
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}
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}
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