Alarm Manager Trigger Only Once Not On Every 5 Mint

Question

I have a scenario, where I do get Gps coordinates on every 5 minutes. For this I am using Alarm manager. But I got sucked since yesterday as Alarm Manager triggered only once and it's not repeating afterward.

Here is the code below

MainActivity.Class

enter code here

private void setAlarm() {

    AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
    Intent intent = new Intent(this, LocationAlarmReceiver.class);
    intent.setAction("com.mhz.evs.ACTION_FETCH_LOCATION"+System.currentTimeMillis());
    PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_IMMUTABLE|FLAG_UPDATE_CURRENT );

    long interval = AlarmManager.INTERVAL_FIFTEEN_MINUTES / 3; // 5 minutes in milliseconds

    long triggerAtMillis = System.currentTimeMillis() + interval;
    if (alarmManager != null) {
            alarmManager.setExactAndAllowWhileIdle ( AlarmManager.RTC_WAKEUP, triggerAtMillis, pendingIntent);
                }
}

LocationReceiver.Class

public class LocationAlarmReceiver extends BroadcastReceiver { Context context;

@Override
public void onReceive(Context context, Intent intent) {
    this.context=context;
    if (intent.getAction().equals("android.intent.action.BOOT_COMPLETED")) {
        Intent alarmIntent = new Intent(context, LocationAlarmReceiver.class);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, alarmIntent, PendingIntent.FLAG_IMMUTABLE);

        AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
        Calendar calendar = Calendar.getInstance();
        calendar.setTimeInMillis(System.currentTimeMillis());
        calendar.add(Calendar.MINUTE, 1);

        if (alarmManager != null) {
            alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), 5 * 60 * 1000, pendingIntent);
        }
    } else {
        Toast.makeText(context,"Triggered",Toast.LENGTH_SHORT).show();
        Intent serviceIntent = new Intent(context, LocationService.class);
        context.startService(serviceIntent);}
}

Manifest.Class

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

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

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

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

<receiver 

android:name=".Receivers.LocationAlarmReceiver" android:exported="true" 
android:enabled="true">
      <intent-filter>

          <action android:name="com.mhz.evs.ACTION_FETCH_LOCATION"/>

      </intent-filter>

  </receiver>

  <service android:name=".Services.LocationService" android:exported="true" android:enabled="true"/>

Code is working fine for one time only but its not repeating again on every 5 minutes. If someone faced the exact issue and resolved it could guide me would be a great help.

Answer 1

I found a solution by utilizing other technique, since repeating function

alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, triggerAtMillis, pendingIntent)

is still not running at myside. I used a function of Alarm Manager that would trigger it one time only in MainActivity.class

am.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + (1000 * 2), pi);

In this way alarm Manager will be called one time and start the service on the given interval. As soon as the service start, it would again fire Alarm Manager function and Alarm would be set again to call for the next interval.

MainActivity.Class

private void setAlarmOneTime() 

{

AlarmManager alarmManager = (AlarmManager) 
getSystemService(Context.ALARM_SERVICE);

Intent intent = new Intent(this, LocationAlarmReceiver.class);    
intent.setAction("com.mhz.evs.ACTION_FETCH_LOCATION"
+System.currentTimeMillis());

PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_IMMUTABLE|FLAG_UPDATE_CURRENT );

long interval = AlarmManager.INTERVAL_FIFTEEN_MINUTES / 3; // 5 minutes in milliseconds

long triggerAtMillis = System.currentTimeMillis() + interval;
if (alarmManager != null) {
        alarmManager.setExactAndAllowWhileIdle ( AlarmManager.RTC_WAKEUP, triggerAtMillis, pendingIntent);
            }}

LocationReceiver.Class

public class LocationAlarmReceiver extends BroadcastReceiver {
Context context;
@Override
public void onReceive(Context context, Intent intent) {

this.context=context;

if (intent.getAction().equals("AlarmFire")) 
{

Toast.makeText(context,"Triggered",Toast.LENGTH_SHORT).show();
        
Intent serviceIntent = new Intent(context, LocationService.class);
        context.startForegroundService(serviceIntent);
}
        }
    } 

In Service Class again fire Alarm Manager

Service. Class

public void setAgainOnetimeTimer(Context context) {

AlarmManager am 
(AlarmManager)context.getSystemService(Context.ALARM_SERVICE);

Intent intent = new Intent(context, LocationAlarmReceiver.class);

intent.setAction("AlarmFire");

PendingIntent pi = PendingIntent.getBroadcast(context, 0, intent, 
PendingIntent.FLAG_IMMUTABLE);

am.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + (1000 * 60 
*10), pi);

}