重启后的Android AlarmManager [英] Android AlarmManager after reboot

问题描述

我有一组需要在重启后保留的警报.我试过在引导接收器上使用，但它们不会再次启动.我不确定我是否理解引导接收器以及如何重新启动所有警报.我已经有一个接收器来接收通知，但不知道我是否可以使用同一个接收器，或者我是否需要一个新的接收器?

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?

谁能告诉我任何好的教程或帮助我?

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

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

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

推荐答案

我不确定我是否理解引导接收器以及如何重新启动所有警报.

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

只需调用您的代码即可在 AlarmManager 上调用 setRepeating()(或其他).

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

例如，在这个示例项目中，PollReceiver 设置为接收 BOOT_COMPLETED.在 onReceive() 中，它重新安排警报:

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);
  }
}

这篇关于重启后的Android AlarmManager的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！