You can use this for version Oreo and higher
if you use service class you can put this code
@Override public void onCreate(){ super.onCreate(); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) startMyOwnForeground(); else startForeground(1, new Notification()); } private void startMyOwnForeground(){ String NOTIFICATION_CHANNEL_ID = "com.example.simpleapp"; String channelName = "My Background Service"; NotificationChannel chan = new NotificationChannel(NOTIFICATION_CHANNEL_ID, channelName, NotificationManager.IMPORTANCE_NONE); chan.setLightColor(Color.BLUE); chan.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE); NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE); assert manager != null; manager.createNotificationChannel(chan); NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID); Notification notification = notificationBuilder.setOngoing(true) .setSmallIcon(R.drawable.icon_1) .setContentTitle("App is running in background") .setPriority(NotificationManager.IMPORTANCE_MIN) .setCategory(Notification.CATEGORY_SERVICE) .build(); startForeground(2, notification); }
Of course don not forget ForeGroundService Permission your AndroidManifest.xml
<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />

### Java Solution (Android 9.0, API 28)

In your `Service` class, add this:
@Override public void onCreate(){ super.onCreate(); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) startMyOwnForeground(); else startForeground(1, new Notification()); }
private void startMyOwnForeground(){ String NOTIFICATION_CHANNEL_ID = "com.example.simpleapp"; String channelName = "My Background Service"; NotificationChannel chan = new NotificationChannel(NOTIFICATION_CHANNEL_ID, channelName, NotificationManager.IMPORTANCE_NONE); chan.setLightColor(Color.BLUE); chan.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE); NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE); assert manager != null; manager.createNotificationChannel(chan);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID); Notification notification = notificationBuilder.setOngoing(true) .setSmallIcon(R.drawable.icon_1) .setContentTitle("App is running in background") .setPriority(NotificationManager.IMPORTANCE_MIN) .setCategory(Notification.CATEGORY_SERVICE) .build(); startForeground(2, notification); }
**UPDATE: ANDROID 9.0 PIE (API 28)**
Add this permission to your `AndroidManifest.xml` file:
<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />