diff --git a/AlarmInitReceiver.java b/AlarmInitReceiver.java new file mode 100644 index 0000000..96c1cb9 --- /dev/null +++ b/AlarmInitReceiver.java @@ -0,0 +1,143 @@ +/* + * 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.ui; + +import android.app.AlarmManager; +import android.app.PendingIntent; +import android.content.BroadcastReceiver; +import android.content.ContentUris; +import android.content.Context; +import android.content.Intent; +import android.database.Cursor; + +import net.micode.notes.data.Notes; +import net.micode.notes.data.Notes.NoteColumns; + + +public class /** + * 报警初始化接收器 + * + * 该类用于接收报警初始化的广播,并根据数据库中的提醒时间设置报警 + * 它查询所有提醒时间大于当前日期的笔记,并为它们设置报警 + */ +package net.micode.notes.ui; + +import android.app.AlarmManager; +import android.app.PendingIntent; +import android.content.BroadcastReceiver; +import android.content.ContentUris; +import android.content.Context; +import android.content.Intent; +import android.database.Cursor; + +import net.micode.notes.data.Notes; +import net.micode.notes.data.Notes.NoteColumns; + +/** + * 定义查询所需的列 + */ +public class AlarmInitReceiver extends BroadcastReceiver { + + // 定义查询投影,包含笔记的ID和提醒时间 + private static final String [] PROJECTION = new String [] { + NoteColumns.ID, + NoteColumns.ALERTED_DATE + }; + + // 定义列的索引 + private static final int COLUMN_ID = 0; + private static final int COLUMN_ALERTED_DATE = 1; + + /** + * 当接收到广播时调用 + * + * @param context 上下文,用于访问应用程序特定的资源和类 + * @param intent 接收到的广播意图 + */ + @Override + public void onReceive(Context context, Intent intent) { + // 获取当前时间 + long currentDate = System.currentTimeMillis(); + + // 查询所有提醒时间大于当前时间的笔记 + Cursor c = context.getContentResolver().query(Notes.CONTENT_NOTE_URI, + PROJECTION, + NoteColumns.ALERTED_DATE + ">? AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE, + new String[] { String.valueOf(currentDate) }, + null); + + // 如果查询结果不为空 + if (c != null) { + // 移动到第一条记录 + if (c.moveToFirst()) { + // 遍历所有记录 + do { + // 获取提醒时间 + long alertDate = c.getLong(COLUMN_ALERTED_DATE); + // 创建意图,用于触发报警接收器 + Intent sender = new Intent(context, AlarmReceiver.class); + // 为意图设置数据,包含笔记的ID + sender.setData(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, c.getLong(COLUMN_ID))); + // 创建待处理的意图 + PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, sender, 0); + // 获取报警管理器 + AlarmManager alermManager = (AlarmManager) context + .getSystemService(Context.ALARM_SERVICE); + // 设置报警 + alermManager.set(AlarmManager.RTC_WAKEUP, alertDate, pendingIntent); + } while (c.moveToNext()); + } + // 关闭游标 + c.close(); + } + } +} +AlarmInitReceiver extends BroadcastReceiver { + + private static final String [] PROJECTION = new String [] { + NoteColumns.ID, + NoteColumns.ALERTED_DATE + }; + + private static final int COLUMN_ID = 0; + private static final int COLUMN_ALERTED_DATE = 1; + + @Override + public void onReceive(Context context, Intent intent) { + long currentDate = System.currentTimeMillis(); + Cursor c = context.getContentResolver().query(Notes.CONTENT_NOTE_URI, + PROJECTION, + NoteColumns.ALERTED_DATE + ">? AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE, + new String[] { String.valueOf(currentDate) }, + null); + + if (c != null) { + if (c.moveToFirst()) { + do { + long alertDate = c.getLong(COLUMN_ALERTED_DATE); + Intent sender = new Intent(context, AlarmReceiver.class); + sender.setData(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, c.getLong(COLUMN_ID))); + PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, sender, 0); + AlarmManager alermManager = (AlarmManager) context + .getSystemService(Context.ALARM_SERVICE); + alermManager.set(AlarmManager.RTC_WAKEUP, alertDate, pendingIntent); + } while (c.moveToNext()); + } + c.close(); + } + } +}