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 Schedule Local Notification in Android Studio using Broadcast Receiver and Alarm Manager Step by Step | NEW METHOD

Source Code

#AndroidManifest

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

<receiver android:enabled="true" android:exported="true" android:name=".broadcast_receiver">
    <intent-filter>
        <action android:name="android.intent.action.BOOT_COMPLETED"/>
        <action android:name="android.intent.action.QUICKBOOT_POWERON"/>
    </intent-filter>
</receiver>

#BroadcastReceiver.class

public class broadcast_receiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        Intent repeating_intent = new Intent(context,daily_word.class);
        repeating_intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

        PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, repeating_intent, PendingIntent.FLAG_IMMUTABLE);
        NotificationCompat.Builder builder = new NotificationCompat.Builder(context, "Notification")
                .setContentIntent(pendingIntent)
                .setSmallIcon(R.drawable.turkey_flag)
                .setColor(ContextCompat.getColor(context, R.color.red))
                .setContentTitle("Reminder")
                .setContentText("Notification Reminder")
                .setAutoCancel(true);

        NotificationManagerCompat notificationManager = NotificationManagerCompat.from(context);

        notificationManager.notify(200, builder.build());
    }
}

///////////////////////////////////////////////////////////
#MainActivity

PendingIntent pending_intent;
AlarmManager alarm_manager;

notification_channel();
pending_intent = PendingIntent.getBroadcast(getApplicationContext(), 0, new Intent(this, broadcast_receiver.class), PendingIntent.FLAG_IMMUTABLE);
alarm_manager = (AlarmManager) getSystemService(ALARM_SERVICE);

private void notification_channel() {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        CharSequence name = "Learn Turkish";
        String description = "Learn Turkish Channel";
        int importance = NotificationManager.IMPORTANCE_DEFAULT;
        NotificationChannel channel = new NotificationChannel("Notification", name, importance);
        channel.setDescription(description);
        NotificationManager notificationManager = getSystemService(NotificationManager.class);
        notificationManager.createNotificationChannel(channel);
    }
}

public void set_notification_alarm(long interval) {
    long triggerAtMillis = System.currentTimeMillis() + interval;

    Calendar calendar = Calendar.getInstance();
    calendar.set(Calendar.HOUR_OF_DAY, 0);
    calendar.set(Calendar.MINUTE, 0);

    if (Build.VERSION.SDK_INT >= 23) {
        alarm_manager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), interval, pending_intent);
    } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        alarm_manager.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, triggerAtMillis, pending_intent);
    } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        alarm_manager.setExact(AlarmManager.RTC_WAKEUP, triggerAtMillis, pending_intent);
    } else {
        alarm_manager.set(AlarmManager.RTC_WAKEUP, triggerAtMillis, pending_intent);
    }
}

public void cancel_notification_alarm() {
    alarm_manager.cancel(pending_intent);
}

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