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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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public class AlarmInitReceiver extends BroadcastReceiver {// AlarmInitReceiver类继承自BroadcastReceiver类
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private static final String [] PROJECTION = new String [] {// 定义一个字符串数组PROJECTION
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NoteColumns.ID,// 第一个元素为NoteColumns.ID
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NoteColumns.ALERTED_DATE// 第二个元素为NoteColumns.ALERTED_DATE
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};
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private static final int COLUMN_ID = 0; // 定义一个整型变量COLUMN_ID，值为0
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private static final int COLUMN_ALERTED_DATE = 1;// 定义一个整型变量COLUMN_ALERTED_DATE，值为1
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@Override
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public void onReceive(Context context, Intent intent) {// 接收广播的方法
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long currentDate = System.currentTimeMillis(); // 获取当前时间戳
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Cursor c = context.getContentResolver().query(Notes.CONTENT_NOTE_URI,// 通过内容提供器查询数据库
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PROJECTION,// 查询的列
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NoteColumns.ALERTED_DATE + ">? AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE,// 查询条件
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new String[] { String.valueOf(currentDate) },// 查询参数
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null); // 排序方式
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if (c != null) {// 如果查询结果不为空
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if (c.moveToFirst()) {// 将游标移动到第一行
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do {// 循环遍历游标
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long alertDate = c.getLong(COLUMN_ALERTED_DATE); // 获取提醒时间
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Intent sender = new Intent(context, AlarmReceiver.class);// 创建一个新的意图
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sender.setData(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, c.getLong(COLUMN_ID)));// 设置意图的数据
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PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, sender, 0);// 创建一个用于启动广播的PendingIntent
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AlarmManager alermManager = (AlarmManager) context// 获取AlarmManager服务
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.getSystemService(Context.ALARM_SERVICE);// 设置定时器
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alermManager.set(AlarmManager.RTC_WAKEUP, alertDate, pendingIntent);// 移动游标到下一行
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} while (c.moveToNext());// 关闭游标
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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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