手机重启后,android报警管理器无效

Question

我正在使用以下代码提醒用户在特定时间使用通知关于应用程序中的新更新每件事情都正常工作我们会在所需的时间收到提醒

这是mainactivity.java

public void setAlarm(){
    alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
    alarmIntent = new Intent(MainActivity.this, AlarmReceiver.class);
    pendingIntent = PendingIntent.getBroadcast(  MainActivity.this, 0, alarmIntent, 0);

    alarmStartTime.set(Calendar.HOUR_OF_DAY, 10);
    alarmStartTime.set(Calendar.MINUTE, 00);
    alarmStartTime.set(Calendar.SECOND, 0);
    alarmManager.setRepeating(AlarmManager.RTC, alarmStartTime.getTimeInMillis(), getInterval(), pendingIntent);
}
private int getInterval(){
     int days = 1;
     int hours = 24;
     int minutes = 60;
     int seconds = 60;
     int milliseconds = 1000;
     int repeatMS = days * hours * minutes * seconds * milliseconds;
     return repeatMS;
}

AlarmReceiver.java

public class AlarmReceiver extends BroadcastReceiver {

    NotificationManager notificationManager;

    @Override
    public void onReceive(Context context, Intent intent) {
        Intent service1 = new Intent(context, AlarmService.class);
            context.startService(service1);
    }
}

和AlarmService.java

public class AlarmService extends Service { 
   private static final int NOTIFICATION_ID = 1;
   private NotificationManager notificationManager;
   private PendingIntent pendingIntent;

    @Override
    public IBinder onBind(Intent arg0)
    {
        return null;
    }

   @SuppressWarnings("static-access")
   @Override
   public void onStart(Intent intent, int startId)
   {
       super.onStart(intent, startId);
       Context context = this.getApplicationContext();
       notificationManager = (NotificationManager)context.getSystemService(context.NOTIFICATION_SERVICE);
       Intent mIntent = new Intent(this, MainActivity.class);
    pendingIntent = PendingIntent.getActivity(context, 0, mIntent, PendingIntent.FLAG_CANCEL_CURRENT);     
    NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
    builder.setContentTitle("Bananas");
    builder.setContentText("get your bananas");
    builder.setSmallIcon(R.drawable.ic_launcher);
    builder.setContentIntent(pendingIntent);

    notificationManager = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
    notificationManager.notify(NOTIFICATION_ID, builder.build());
    }
}

我的问题是,如果我们重新启动手机所有以前关于警报的信息都会丢失,并且我们下次重启后没有收到警报,可以做的是警报管理器或通知的问题.

Answer 1

您需要将此添加到您的AndroidManifest.xml:

 <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

 <receiver
            android:name="Your package name.AlarmReboot"
            android:enabled="true"
            android:exported="true" >
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" />
                <action android:name="android.intent.action.QUICKBOOT_POWERON" />
            </intent-filter>
        </receiver>

并添加一个广播接收器,一旦手机重新启动将再次设置警报:

public class AlarmReboot extends BroadcastReceiver{

}