重启后的Android AlarmManager

Question

我有一组警报,我需要在重启后保留.我尝试过使用启动接收器,但它们不会重新启动.我不确定我是否理解启动接收器以及如何重新启动所有警报.我已经有一个接收器用于我的通知,但不知道我是否可以使用相同的接收器或我是否需要一个新接收器？

谁能指点我任何好的教程或帮助我？

干杯

代码:

    DatabaseHandler db = new DatabaseHandler(this);  
    List<UAlarm> alarms = db.getAllAlarms();        
    AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);  
    for (UAlarm ua : alarms) {  
        String programme = ua.getTitle();  
        String startTime = ua.getStart();  
        String endTime = ua.getEnd();  
        String nowPlaying = ua.getChannel();  
        db.addAlarm(new UAlarm(programme, startTime, endTime, nowPlaying, ""));  
        final UAlarm ut = new UAlarm();  
        ut.setTitle(programme);  
        ut.setStart(startTime);  
        ut.setEnd(endTime);  
        ut.setChannel(nowPlaying);  
        ut.setId(db.getLastEntered());  
        String [] bla = startTime.split(":");  
        int hour = Integer.parseInt(bla[0].trim());  
        int minute = Integer.parseInt(bla[1].trim());  
        minute -= 2;  
        Calendar cal = Calendar.getInstance();  
        cal.set(Calendar.HOUR_OF_DAY, hour);  
        cal.set(Calendar.MINUTE, minute);  
        Intent intenta = new Intent(this, NotificationMenu.class);  
        String name = programme;  
        intenta.putExtra("name", name);  
        intenta.putExtra("id", db.getLastEntered());  
          PendingIntent pendingIntent = PendingIntent.getBroadcast(this, ua.getId(),  
            intenta, PendingIntent.FLAG_CANCEL_CURRENT);  
          am.set(AlarmManager.RTC_WAKEUP,  
            cal.getTimeInMillis(), pendingIntent);      
    }  
}  

NotificationMenu是通知,这就是我使用AlarmManager的原因

Answer 1

我不确定我是否理解启动接收器以及如何重新启动所有警报.

只需调用您的代码来调用setRepeating()(或其他)AlarmManager.

例如,在此示例项目中,PollReceiver设置为receive BOOT_COMPLETED.在onReceive(),它重新安排警报:

package com.commonsware.android.schedsvc;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.SystemClock;

public class PollReceiver extends BroadcastReceiver {
  private static final int PERIOD=5000;

  @Override
  public void onReceive(Context ctxt, Intent i) {
    scheduleAlarms(ctxt);
  }

  static void scheduleAlarms(Context ctxt) {
    AlarmManager mgr=
        (AlarmManager)ctxt.getSystemService(Context.ALARM_SERVICE);
    Intent i=new Intent(ctxt, ScheduledService.class);
    PendingIntent pi=PendingIntent.getService(ctxt, 0, i, 0);

    mgr.setRepeating(AlarmManager.ELAPSED_REALTIME,
                     SystemClock.elapsedRealtime() + PERIOD, PERIOD, pi);
  }
}