Receiver is not being called by AlarmManager - Android

Question

I have written this class to call reciver every 24 hours

I was trying to use same receiver for "SabahReceiver" then i added another receiver "MasaReceiver", all possibilities did not work for me!

anybody can tell me whats going wrong !?

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

import com.mbh.test.receivers.MasaReciever;
import com.mbh.test.receivers.SabahReciever;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/**
 * Created by MBH on 17/12/15.
 */
public class SabahMasaAlarmManager {
    public static final int MINUTE = 60000;
    public static final int HOUR = 1000 * 60 * 60;
    public static final int DAY = 86400000;

    private PendingIntent mSabahPendingIntent;
    private PendingIntent mMasaPendingIntent;
    private Context mContext;

    private void SetupAlarms() {
        /* Retrieve a PendingIntent that will perform a broadcast */
        Intent sabahAlarm = new Intent(mContext, SabahReciever.class);
//        sabahAlarm.putExtra(SabahReciever.KEY_IS_SABAH, true);
        mSabahPendingIntent = PendingIntent.getBroadcast(mContext, 100, sabahAlarm, 0);

        /* Retrieve a PendingIntent that will perform a broadcast */
        Intent masaAlarm = new Intent(mContext, MasaReciever.class);
//        sabahAlarm.putExtra(SabahReciever.KEY_IS_SABAH, false);
        mMasaPendingIntent = PendingIntent.getBroadcast(mContext, 101, masaAlarm, 0);
    }

    public void StartAlarm() {

        SimpleDateFormat dateFormat = new SimpleDateFormat(
                "yyyy-MM-dd HH:mm:ss" );

        Date now = Calendar.getInstance().getTime();

        Calendar sabahDate = Calendar.getInstance();
        sabahDate.set(Calendar.HOUR_OF_DAY, 23);
        sabahDate.set(Calendar.MINUTE, 47);
        sabahDate.set(Calendar.SECOND, 0);
//        sabahDate.set(Calendar.HOUR_OF_DAY, 6);
//        sabahDate.set(Calendar.MINUTE, 0);
        if(sabahDate.getTime().before(now)){
            sabahDate.add(Calendar.DAY_OF_YEAR, 1);
        }

        Log.d("DATE", "Sabah: "+ dateFormat.format(sabahDate.getTime()));

        Calendar masaDate = Calendar.getInstance();
        masaDate.set(Calendar.HOUR_OF_DAY, 23);
        masaDate.set(Calendar.MINUTE, 49);
//        masaDate.set(Calendar.HOUR_OF_DAY, 20);
//        masaDate.set(Calendar.MINUTE, 0);
        masaDate.set(Calendar.SECOND, 0);
        if(masaDate.getTime().before(now)){
            masaDate.add(Calendar.DAY_OF_YEAR, 1);
        }


        Log.d("DATE", "Masa: "+ dateFormat.format(masaDate.getTime()));

        AlarmManager manager = (AlarmManager) mContext.getApplicationContext().getSystemService(Context.ALARM_SERVICE);

        manager.setInexactRepeating(AlarmManager.RTC_WAKEUP, sabahDate.getTimeInMillis(), DAY, mSabahPendingIntent);
//        manager.setInexactRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()+10000, 86400000, mSabahPendingIntent);

        manager.setInexactRepeating(AlarmManager.RTC_WAKEUP, masaDate.getTimeInMillis(), DAY, mMasaPendingIntent);
//        manager.setInexactRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()+20000, 86400000, mMasaPendingIntent);
    }

    public void cancelAlarm() {
        AlarmManager managerSabah = (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE);
        managerSabah.cancel(mSabahPendingIntent);

        AlarmManager managerMasa = (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE);
        managerMasa.cancel(mMasaPendingIntent);
    }

    public SabahMasaAlarmManager(Context baseContext) {
        mContext = baseContext;
        SetupAlarms();
    }
}

Answer 1

setInexactRepeating() is not bound to fire the alarm exactly after the mentioned time. There may be some delay or it may fire a bit early. Basically framework 'batch' the inexact alarms to fire all at one time. Use setExact. Also consider the deep sleep mode. See How to use CPU to perform any operation in deep sleep mode. As you want alarm to fire once in 24 hours, there are good chances that device will be in sleep mode when alarm fires.