Setting Alarm for Particular Timings with Respect to Start Date and End Date of an Event in Android

Question

I am having an Calendar Event with start date as (24hrs format) 27-Apr-2016 11:00:00 and end date as 29-Apr-2016 11:00:00. I am having three timings 10:45:00, 10:30:00 and 10:15:00 which are calculated for alerting the event prior to the actual set timings (i.e 15 mins, 30 mins and 45 mins early to the start date).

Also the alarm must repeat daily for the same prior timings till the end date is reached.

Here is how i tried to do it, How ever the below code does not invoke the alarm nor it repeats daily

In the MainActivity.java

AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
Intent intent = new Intent(this, Broadcast.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this.getApplicationContext(), 234324243, intent, PendingIntent.FLAG_UPDATE_CURRENT);

Calendar calendar = Calendar.getInstance();
calendar.set(2016,03,27,11,00,00);
alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis()-(60000*15), pendingIntent); // subtract for 15 mins prior alarm time
alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis()-(60000*30), pendingIntent); // subtract for 30 mins prior alarm time
alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis()-(60000*45), pendingIntent); // subtract for 45 mins prior alarm time

In the Broadcast.java

Log.i("Alarm", "Alarm Manager is called");
Toast.makeText(context, new Date().toString(), Toast.LENGTH_SHORT).show();

How can I achieve this? Please help

Answer 1

Here is my sample code, Try this:

Modify the date and time as your need in the below code.

 public static int REPEAT_NOTIFICATION1 = 201;
    public static int REPEAT_NOTIFICATION2 = 202;
    public static int REPEAT_NOTIFICATION3 = 203;

     private void repeatNotification() {
        final DateTime dateTime1 = DateTime.now();
        dateTime1.hourOfDay().setCopy(7);
        dateTime1.minuteOfHour().setCopy(30);
        dateTime1.secondOfMinute().setCopy(00);
        final Calendar calendarNotifiedTime1 = Calendar.getInstance();
        calendarNotifiedTime1.set(Calendar.HOUR, dateTime1.getHourOfDay());
        calendarNotifiedTime1.set(Calendar.MINUTE, dateTime1.getMinuteOfHour());
        calendarNotifiedTime1.set(Calendar.SECOND, dateTime1.getSecondOfMinute());
        calendarNotifiedTime1.set(Calendar.AM_PM, Calendar.AM);

        final DateTime dateTime2 = DateTime.now();
        dateTime2.hourOfDay().setCopy(12);
        dateTime2.minuteOfHour().setCopy(30);
        dateTime2.secondOfMinute().setCopy(00);
        final Calendar calendarNotifiedTime2 = Calendar.getInstance();
        calendarNotifiedTime2.set(Calendar.HOUR, dateTime2.getHourOfDay());
        calendarNotifiedTime2.set(Calendar.MINUTE, dateTime2.getMinuteOfHour());
        calendarNotifiedTime2.set(Calendar.SECOND, dateTime2.getSecondOfMinute());
        calendarNotifiedTime2.set(Calendar.AM_PM, Calendar.PM);

        final DateTime dateTime3 = DateTime.now();
        dateTime3.hourOfDay().setCopy(6);
        dateTime3.minuteOfHour().setCopy(30);
        dateTime3.secondOfMinute().setCopy(00);
        final Calendar calendarNotifiedTime3 = Calendar.getInstance();
        calendarNotifiedTime3.set(Calendar.HOUR, dateTime3.getHourOfDay());
        calendarNotifiedTime3.set(Calendar.MINUTE, dateTime3.getMinuteOfHour());
        calendarNotifiedTime3.set(Calendar.SECOND, dateTime3.getSecondOfMinute());
        calendarNotifiedTime3.set(Calendar.AM_PM, Calendar.PM);


        Intent intent1 = new Intent(EmptyActivity.this, NotificationReceiver.class);
        intent1.putExtra(NotificationReceiver.NOTIFICATION_MESSAGE, "Repeat " + dateTime1.getHourOfDay() + ":" + dateTime1.getMinuteOfHour() + ":" + dateTime1.getSecondOfMinute());
        Intent intent2 = new Intent(EmptyActivity.this, NotificationReceiver.class);
        intent2.putExtra(NotificationReceiver.NOTIFICATION_MESSAGE, "Repeat " + dateTime2.getHourOfDay() + ":" + dateTime2.getMinuteOfHour() + ":" + dateTime2.getSecondOfMinute());
        Intent intent3 = new Intent(EmptyActivity.this, NotificationReceiver.class);
        intent3.putExtra(NotificationReceiver.NOTIFICATION_MESSAGE, "Repeat " + dateTime3.getHourOfDay() + ":" + dateTime3.getMinuteOfHour() + ":" + dateTime3.getSecondOfMinute());
        PendingIntent pendingIntent1 = PendingIntent.getBroadcast(EmptyActivity.this, REPEAT_NOTIFICATION1, intent3, PendingIntent.FLAG_UPDATE_CURRENT);
        PendingIntent pendingIntent2 = PendingIntent.getBroadcast(EmptyActivity.this, REPEAT_NOTIFICATION2, intent2, PendingIntent.FLAG_UPDATE_CURRENT);
        PendingIntent pendingIntent3 = PendingIntent.getBroadcast(EmptyActivity.this, REPEAT_NOTIFICATION3, intent3, PendingIntent.FLAG_UPDATE_CURRENT);
        AlarmManager alarmManager = (AlarmManager) this.getSystemService(ALARM_SERVICE);


                cancelNotification(REPEAT_NOTIFICATION1);
        alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendarNotifiedTime1.getTimeInMillis(), AlarmManager.INTERVAL_DAY, pendingIntent1);
                cancelNotification(REPEAT_NOTIFICATION2);
        alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendarNotifiedTime2.getTimeInMillis(), AlarmManager.INTERVAL_DAY, pendingIntent2);
                cancelNotification(REPEAT_NOTIFICATION3);
        alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendarNotifiedTime3.getTimeInMillis(), AlarmManager.INTERVAL_DAY, pendingIntent3);
    }

Cancel Notification:

 public void cancelNotification(int requestCode) {
            try {
                Intent notificationIntent = new Intent(getApplicationContext(), NotificationReceiver.class);
                PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), requestCode, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
                AlarmManager alarmManager = (AlarmManager) getApplicationContext().getSystemService(Context.ALARM_SERVICE);
                alarmManager.cancel(pendingIntent);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

BroadCast Receiver:

   public class NotificationReceiver extends BroadcastReceiver {
    public static String NOTIFICATION_MESSAGE = "notificationMessage";
    public static int REPEAT_NOTIFICATION1 = 201;
    public static int REPEAT_NOTIFICATION2 = 202;
    public static int REPEAT_NOTIFICATION3 = 203;

    Context context;

    @Override
    public void onReceive(Context context, Intent intent) {

        this.context = context;

        //Assume StartDate = yesterday.
        DateTime startDate = DateTime.now().minusDays(1);
        //Assume EndDate = tomorrow
        DateTime endDate = startDate.plusDays(2);

        DateTime today = DateTime.now();

        if (today.isBefore(endDate) || today.isEqual(endDate)) {

            String message = intent.getStringExtra(NOTIFICATION_MESSAGE);
            NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
            //Define sound URI
            Uri soundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);

            Intent notificationIntent = new Intent(context, EmptyActivity.class);
            notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);

            PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);
            final DateTime dateTime = DateTime.now();
            int color = 0xffffaa00;
//        int color1 = context.getColor(R.color.notificatinBackgroundColor);
            NotificationCompat.Builder builder = new NotificationCompat.Builder(context);
            builder.setSmallIcon(R.drawable.festi_push_message_small);
            builder.setContentIntent(pendingIntent);
            builder.setContentTitle("Notification Sample");
            builder.setAutoCancel(true);
            builder.setContentText(message + ", Current Time : " + dateTime.getHourOfDay() + ":" + dateTime.getMinuteOfHour() + ":" + dateTime.getSecondOfMinute());
            builder.setSound(soundUri);
            builder.setLights(Color.RED, 1000, 1000);
            builder.setColor(color);

            Notification notification = builder.build();

            notification.flags |= Notification.FLAG_AUTO_CANCEL;

            notificationManager.notify(102938, notification);
        } else {
            cancelNotification(REPEAT_NOTIFICATION1);
            cancelNotification(REPEAT_NOTIFICATION2);
            cancelNotification(REPEAT_NOTIFICATION3);
        }
    }

    public void cancelNotification(int requestCode) {
        try {
            Intent notificationIntent = new Intent(context, NotificationReceiver.class);
            PendingIntent pendingIntent = PendingIntent.getBroadcast(context, requestCode, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
            AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
            alarmManager.cancel(pendingIntent);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}

Manifest.xml

  <receiver android:name=".NotificationReceiver" />