const View = android.view.View;
const window = Application.android.startActivity.getWindow();
const decorView = window.getDecorView();
window.clearFlags(android.view.WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
decorView.setSystemUiVisibility(
  View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
  View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
  View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN |
  View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
window.setStatusBarColor(0x000000);