MainActivity.java

public class MainActivity extends AppCompatActivity {
    ActivityMainBinding activityMainBinding;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        activityMainBinding = ActivityMainBinding.inflate(getLayoutInflater());
        setContentView(activityMainBinding.getRoot());
        activityMainBinding.textView.setText("Working!!");
    }
}