AlarmManagerWorkManagerAndNotification

One receiver for one natification trigger

• Manifest

<?xml version="1.0" encoding="utf-8"?>
<manifest>

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

    <application>

        ...

        <receiver
            android:name=".service.AlarmReceiver"
            android:directBootAware="true"
            android:enabled="true"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" />
                <action android:name="android.intent.action.LOCKED_BOOT_COMPLETED" />
            </intent-filter>
        </receiver>

        ...

    </application>

</manifest>

• AlarmReceiver

public class AlarmReceiver extends BroadcastReceiver {

    private static final String TAG = "AlarmReceiver_";

    @Override
    public void onReceive(Context context, Intent intent) {
        Log.d(TAG, "onReceive: Alarm Terpanggil");

        NotificationHelper notificationHelper = new NotificationHelper(context);

        notificationHelper.createNotification("Notification Oreo","GZeinNumer. https://github.com/gzeinnumer");
    }
}

• NotificationHelper

public class NotificationHelper {

    private Context mContext;
    private NotificationManager mNotificationManager;
    private NotificationCompat.Builder mBuilder;
    public static final String NOTIFICATION_CHANNEL_ID = "10001";

    public NotificationHelper(Context context) {
        mContext = context;
    }

    /**
     * Create and push the notification
     */
    public void createNotification(String title, String message)
    {
        /**Creates an explicit intent for an Activity in your app**/
        Intent resultIntent = new Intent(mContext , MainActivity.class);
        resultIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

        PendingIntent resultPendingIntent = PendingIntent.getActivity(mContext,
                0 /* Request code */, resultIntent,
                PendingIntent.FLAG_UPDATE_CURRENT);

        mBuilder = new NotificationCompat.Builder(mContext);
        mBuilder.setSmallIcon(R.mipmap.ic_launcher);
        mBuilder.setContentTitle(title)
                .setContentText(message)
                .setAutoCancel(false)
                .setSound(Settings.System.DEFAULT_NOTIFICATION_URI)
                .setContentIntent(resultPendingIntent);

        mNotificationManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);

        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O)
        {
            int importance = NotificationManager.IMPORTANCE_HIGH;
            NotificationChannel notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "NOTIFICATION_CHANNEL_NAME", importance);
            notificationChannel.enableLights(true);
            notificationChannel.setLightColor(Color.RED);
            notificationChannel.enableVibration(true);
            notificationChannel.setVibrationPattern(new long[]{100, 200, 300, 400, 500, 400, 300, 200, 400});
            assert mNotificationManager != null;
            mBuilder.setChannelId(NOTIFICATION_CHANNEL_ID);
            mNotificationManager.createNotificationChannel(notificationChannel);
        }
        assert mNotificationManager != null;
        mNotificationManager.notify(0 /* Request Code */, mBuilder.build());
    }
}

• MainActivity

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "MainActivity_";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        startAlarm();
    }

    private void startAlarm() {
        Calendar calendar = Calendar.getInstance();
        calendar.setTimeInMillis(System.currentTimeMillis());

        //TRIGGER Alaram Pada
        calendar.set(Calendar.HOUR_OF_DAY,15);
        calendar.set(Calendar.MINUTE, 15);

        AlarmManager alarmMgr = (AlarmManager) getApplicationContext().getSystemService(Context.ALARM_SERVICE);
        Intent intent = new Intent(getApplicationContext(), AlarmReceiver.class);
        PendingIntent alarmIntent = PendingIntent.getBroadcast(getApplicationContext(), 0, intent, 0);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            if (alarmMgr!=null){
                alarmMgr.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY, alarmIntent);
            } else {
                Log.d(TAG, "startAlarm: alarmMgr null");
            }
        }
    }
}

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Copyright 2020 M. Fadli Zein