How do I remove the title bar in android studio?

Question

In my app there is this title bar at the top where the overflow menu would be, but I don\'t need settings and only have one screen. When I change the theme like described in

Answer 1

This works for me i hope this work for you as well

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
    setContentView(R.layout.activity_main);
}