Not allowed to start service Intent - Android Oreo

Question

I am currently using the startWakefulService function which is crashing in Oreo. I realise I either have to switch to startForegroundService() and use a foreground service,

Answer 1

Based on the documentation:

As of Android O, background check restrictions make this class no longer generally useful. (It is generally not safe to start a service from the receipt of a broadcast, because you don't have any guarantees that your app is in the foreground at this point and thus allowed to do so.) Instead, developers should use android.app.job.JobScheduler to schedule a job, and this does not require that the app hold a wake lock while doing so (the system will take care of holding a wake lock for the job).

Only alternative is to start a ForeGroundService or use JobScheduler/JobIntentService

You can start foreground service as follows:

@Override
public void onReceive(Context context, Intent intent) {

    // Explicitly specify that GCMIntentService will handle the intent.
    ComponentName comp = new ComponentName(context.getPackageName(), GCMIntentService.class.getName());
    // Start the service, keeping the device awake while it is launching.
    ContextCompat.startForegroundService(context,intent.setComponent(comp));
    ...
}

You also need to call startService() from your Service class and display notification. You can follow my answer on this SO for implementation details.

Answer 2

I experience the same behaviour.

Why this issue happens?

Due to the new Background Execution Limits of Android 8 and you should not start services background.

How I fixed it

Migrate your GCMIntetService to JobIntentService instead of IntentService.

Please follow this steps: 1) Add the BIND_JOB_SERVICE permission to your service:

<service android:name=".service.GCMIntentService"
        android:exported="false"
        android:permission="android.permission.BIND_JOB_SERVICE"/>

2) In your GCMIntentService, instead extending the IntentService, use android.support.v4.app.JobIntentService and override onHandleWork then remove the override in you onHandleIntent.

public class GCMIntentService extends JobIntentService {

    // Service unique ID
    static final int SERVICE_JOB_ID = 50;

    // Enqueuing work in to this service.
    public static void enqueueWork(Context context, Intent work) {
        enqueueWork(context, GCMIntentService.class, SERVICE_JOB_ID, work);
    }

    @Override
    protected void onHandleWork(@NonNull Intent intent) {
        onHandleIntent(intent);
    }

    private void onHandleIntent(Intent intent) {
        //Handling of notification goes here
    }
}

Then finally, in your GCMBroadcastReceiver, enqueue your GCMIntentService.

public class GCMBroadcastReceiver extends WakefulBroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        // Explicitly specify that GcmIntentService will handle the intent.
        ComponentName comp = new ComponentName(context.getPackageName(),
                GCMIntentService.class.getName());
        // Start the service, keeping the device awake while it is launching.
        // startWakefulService(context, (intent.setComponent(comp)));

        //setResultCode(Activity.RESULT_OK);

        GCMIntentService.enqueueWork(context, (intent.setComponent(comp)));
    }
}

This implementation work for me after we update our target sdk to 27 and I hope it works for you.