Android - implementing startForeground for a servi

Question

So I'm not sure where/how to implement this method to make my service run in the foreground. Currently I start my service by the following in another activity:

Intent i = new Intent(context, myService.class); 
context.startService(i);

And then in myServices' onCreate() I try the startForeground()...?

Notification notification = new Notification();
startForeground(1, notification);

So yeah I'm a bit lost and unsure of how to implement this.

Answer 1

Add given code Service class for "OS >= Build.VERSION_CODES.O" in onCreate()

@Override
public void onCreate(){
    super.onCreate();

     .................................
     .................................

    //For creating the Foreground Service
    NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
    String channelId = Build.VERSION.SDK_INT >= Build.VERSION_CODES.O ? getNotificationChannel(notificationManager) : "";
    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, channelId);
    Notification notification = notificationBuilder.setOngoing(true)
            .setSmallIcon(R.mipmap.ic_launcher)
           // .setPriority(PRIORITY_MIN)
            .setCategory(NotificationCompat.CATEGORY_SERVICE)
            .build();

    startForeground(110, notification);
}



@RequiresApi(Build.VERSION_CODES.O)
private String getNotificationChannel(NotificationManager notificationManager){
    String channelId = "channelid";
    String channelName = getResources().getString(R.string.app_name);
    NotificationChannel channel = new NotificationChannel(channelId, channelName, NotificationManager.IMPORTANCE_HIGH);
    channel.setImportance(NotificationManager.IMPORTANCE_NONE);
    channel.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE);
    notificationManager.createNotificationChannel(channel);
    return channelId;
}

Add this permission in manifest file:

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

Answer 2

If you want to make IntentService a Foreground Service

then you should override onHandleIntent()like this

Override
protected void onHandleIntent(@Nullable Intent intent) {


    startForeground(FOREGROUND_ID,getNotification());     //<-- Makes Foreground

   // Do something

    stopForeground(true);                                // <-- Makes it again a normal Service                         

}

How to make notification ?

simple. Here is the getNotification() Method

public Notification getNotification()
{

    Intent intent = new Intent(this, SecondActivity.class);
    PendingIntent pendingIntent = PendingIntent.getActivity(this,0,intent,0);


    NotificationCompat.Builder foregroundNotification = new NotificationCompat.Builder(this);
    foregroundNotification.setOngoing(true);

    foregroundNotification.setContentTitle("MY Foreground Notification")
            .setContentText("This is the first foreground notification Peace")
            .setSmallIcon(android.R.drawable.ic_btn_speak_now)
            .setContentIntent(pendingIntent);


    return foregroundNotification.build();
}

Deeper Understanding

What happens when a service becomes a foreground service

This happens

What is a foreground Service ?

A foreground service,

• makes sure that user is actively aware of that something is going on in the background by providing the notification.

• (most importantly) is not killed by System when it runs low on memory

A use case of foreground service

Implementing song download functionality in a Music App

Answer 3

In addition to RAWA answer, this peace of code:

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
    startForegroundService(intent)
} else {
    startService(intent)
}

You can change to:

ContextCompat.startForegroundService(context, yourIntent);

If you will look inside this method then you can see that this method do all checking work for you.