Android/AlarmReceiver.java

/*
 * 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.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

public class AlarmReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        intent.setClass(context, AlarmAlertActivity.class);
        //启动AlarmAlertActivity
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        /*activity要存在于activity的栈中，而非activity的途径启动activity时必然不存在一个activity的栈*/
        //所以要新起一个栈装入启动的activity
        context.startActivity(intent);
    }
}
//这是实现alarm这个功能最接近用户层的包，基于上面的两个包
////作用还需要深究但是对于setClass和addFlags的