Context.startForegroundService() did not then call

Question

I am using Service Class on the Android O OS.

I plan to use the Service in the background.

The Android recommendation states that startService should use startForegroundService.

If you use startForegroundService, the Service throws a Context.startForegroundService() did not then call Service.startForeground() error.

What's wrong with this?

Answer 1

I called ContextCompat.startForegroundService(this, intent) to start the service then

In service onCreate

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

        if (Build.VERSION.SDK_INT >= 26) {
            String CHANNEL_ID = "my_channel_01";
            NotificationChannel channel = new NotificationChannel(CHANNEL_ID,
                    "Channel human readable title",
                    NotificationManager.IMPORTANCE_DEFAULT);

            ((NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE)).createNotificationChannel(channel);

            Notification notification = new NotificationCompat.Builder(this, CHANNEL_ID)
                    .setContentTitle("")
                    .setContentText("").build();

            startForeground(1, notification);
        }
}

Answer 2

Problem With Android O API 26

If you stop the service right away (so your service does not actually really runs (wording / comprehension) and you are way under the ANR interval, you still need to call startForeground before stopSelf

https://plus.google.com/116630648530850689477/posts/L2rn4T6SAJ5

Tried this Approach But it Still creates an error:-

if (Util.SDK_INT > 26) {
    mContext.startForegroundService(playIntent);
} else {
    mContext.startService(playIntent);
}

I Am Using this until the Error is Resolved

mContext.startService(playIntent);

Answer 3

I just check the PendingIntent null or nor not before calling the context.startForegroundService(service_intent) function.

this works for me

PendingIntent pendingIntent=PendingIntent.getBroadcast(context,0,intent,PendingIntent.FLAG_NO_CREATE);

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O && pendingIntent==null){
            context.startForegroundService(service_intent);
        }
        else
        {
            context.startService(service_intent);
        }
}

Answer 4

This all goes away if you rewrite your service to be started w/ bindService.

An example of how to do this can be seen at: https://github.com/paulpv/ForegroundServiceAPI26/tree/bound

A diff of my "repro" branch can been seen at: https://github.com/paulpv/ForegroundServiceAPI26/compare/repro...bound?expand=1

Answer 5

This error also occurs on Android 8+ when Service.startForeground(int id, Notification notification) is called while id is set to 0.

id int: The identifier for this notification as per NotificationManager.notify(int, Notification); must not be 0.

Answer 6

From Google's docs on Android 8.0 behavior changes:

The system allows apps to call Context.startForegroundService() even while the app is in the background. However, the app must call that service's startForeground() method within five seconds after the service is created.

Solution: Call startForeground() in onCreate() for the Service which you use Context.startForegroundService()

See also: Background Execution Limits for Android 8.0 (Oreo)