Android 7.0 (Nougat) Doze Mode Stops Web Service

Question

I have an Android foreground service with a WiFi lock that acts as a web service for another local device. Before Doze mode, acquiring a WiFi lock and being a service as needed worked great.

Even with battery optimizations turned off for my app, the phone is still killing the app when the screen is off for a few minutes.

How do I properly alert Android that a service requested by the customer explicitly is being performed in the foreground, and they do not want their phone to go to sleep at this time?

EDIT: This issue still exists in Android 8.0 (Oreo)

Answer 1

you can do this way: just as you call your service, you can add a code to keep screen awake. This will avoid automatic lock of the phone. Below is a sample code snippet from the docs.

    public class MainActivity extends Activity {
      @Override
      protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //keep screen awake
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
      }

The advantage of this approach is that unlike wake locks, it doesn't require special permission, and the platform correctly manages the user moving between applications, without your app needing to worry about releasing unused resources. In addition, you can use alarm manager in an effective way as described in this SO answer: