Android AlarmManager after reboot

问题

I have a set of alarms that I need to keep after reboot. I've tried using on an boot receiver but they won't start again. I'm not sure if I understand the boot receiver and how to then restart all the alarms. I already have one receiver for my notifications, but don't know whether I can use the same receiver or if I need a new one?

Could anyone point me to any good tutorials or help me out?

Cheers

Code :

    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);      
    }  
}

with NotificationMenu being the notifications, which is why I'm using the AlarmManager

回答1:

I'm not sure if I understand the boot receiver and how to then restart all the alarms.

Just call your code to call setRepeating() (or whatever) on AlarmManager.

For example, in this sample project, PollReceiver is set to receive BOOT_COMPLETED. In onReceive(), it reschedules the alarms:

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);
  }
}

来源：https://stackoverflow.com/questions/12512717/android-alarmmanager-after-reboot

标签

android

restart

reboot

alarms