CODEWITHSUNDEEP
androidnotificationsalarmmanager
1234567
1234567

Reputation: 2485

android alarm manager does not work after phone is restarted

i am using following code to alert users using notifications at a specific time about new updates in the app every thing works fine and we receive alerts at the desired time

here is the 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);
    }
}

and 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());
    }
}

my problem is if we restart the phone all the previous info about alarms is lost and we dont receive an alert next time after restart, what can be done is it an issue with alarm manager or notifications.

Upvotes: 2

Views: 2217

Answers (3)

MorZa
MorZa

Reputation: 2325

You need to add this to your 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>

and add a Broadcast Reciever that will set the alarm again once the phone is rebooted:

public class AlarmReboot extends BroadcastReceiver{

}

Upvotes: 7

1234567
1234567

Reputation: 2485

this explains better

http://javatechig.com/android/repeat-alarm-example-in-android

how to set alarm with device reboot

Upvotes: 2

Sarfaraz
Sarfaraz

Reputation: 345

Instead of using setRepeating, you can use setExact() API as setRepeating() API delays the AlarmManager intent for the duration it was in sleep mode or switched off.

Upvotes: 0

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