@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
An empty {@link Activity} that Espresso Device APIs are tested against.
ui/espresso/EspressoDeviceSample/app/src/main/java/com/example/android/testing/espresso/EspressoDeviceSample/MainActivity.java