Scheduling a task to run every 24 hours

Question

I am trying to create an Android app that increments a counter after every 24 hours. I am just making use of SharedPreferences and when it is time it increments the value in sha

Answer 1

You can use AlarmManager class to schedule a repeating alarm with PendingIntent that will do your job when scheduled. https://developer.android.com/training/scheduling/alarms

I'll give you sample of dailyAlarm doing some job when fired:

 public void setDailyAlarmOn(Context context, long alarmTime, Uri reminderTask, long repeatTime) {
        AlarmManager manager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);


        PendingIntent operation =
                yourJobHere.getReminderPendingIntent(context, reminderTask);

        if (Build.VERSION.SDK_INT >= 23) {

            manager.setRepeating(AlarmManager.RTC_WAKEUP, alarmTime, repeatTime, operation);
        } else {
            manager.setRepeating(AlarmManager.RTC_WAKEUP, alarmTime,  repeatTime, operation);
        }

    }

alarmTime - first time in miliseconds when alarm is supposed to be fired
repeatTime - time in mili seconds - 86400000 for 24h (1000*60*60*24)
Uri reminderTask - uri that I created to not to cancel previous alarms, in short, it's a code for alarm application and it's uri from row in database.
operation - PendingIntent which you'll need to create

I did it by extending IntentService and handling job in onHandleIntent: YourJobHere.class:

public class YourJobHere extends IntentService {
    private static final String TAG = YourJobHere.class.getSimpleName();

    public static PendingIntent getReminderPendingIntent(Context context, Uri uri) {
        Intent action = new Intent(context, YourJobHere.class);
        action.setData(uri);
        return PendingIntent.getService(context, 0, action, PendingIntent.FLAG_UPDATE_CURRENT);
    }

    public YourJobHere() {
        super(TAG);
    }

    @Override
    protected void onHandleIntent(@Nullable Intent intent) {

        //TODO: make your job here

      }
}

If you want you can refer to my full project on GitLab: https://gitlab.com/Domin_PL/SlothProfileScheduler

Hope it'll help you