Reduce friction with Location API - new approach : https://android-developers.googleblog.com/2017/06/reduce-friction-with-new-location-apis.html

MainActivity.java

public class MainActivity extends AppCompatActivity {

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    FusedLocationProviderClient client =
            LocationServices.getFusedLocationProviderClient(this);

    client.requestLocationUpdates(LocationRequest.create(), pendingIntent)
        .addOnCompleteListener(new OnCompleteListener() {
          @Override
          public void onComplete(@NonNull Task task) {
            Log.d("MainActivity", "Result: " + task.getResult());
          }
        });