On my app i use immersive sticky mode on every activity this way:

```
protected void onCreate(Bundle savedInstanceState) {
    getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
            | View.SYSTEM_UI_FLAG_LAYOUT_STABLE
            | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
            | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
            | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
            |View.SYSTEM_UI_FLAG_FULLSCREEN);
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_mainmenu);
}

```

And it works very well, but when I switch between activities buttons and bar show up for a second, and then hide again. Is there any way to keep them hidden all the time?

I'm very new to this, so please explain it simply.