android how to hide action bar and status bar

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;

public class MainActivity extends AppCompatActivity {
   @Override 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);
   }
}