How can I do permanently fullScreen app on Java

Question

I made the application full screen with the following code block. But when user scrolls from top to bottom, notification bar and nav bar appear. How can I completely prevent this?

requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); // Tam ekran yap
        View decorView = getWindow().getDecorView();
        int uiOptions = 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
                | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
        decorView.setSystemUiVisibility(uiOptions);

Answer 1

You might have to change your Java class accordingly little bit.

If you want to remove status bar too then use this before setContentView(layout) in onCreateView method

 getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
    WindowManager.LayoutParams.FLAG_FULLSCREEN);

Answer 2

Just Used these 2 lines of code inside onCreate

Window window = getWindow();
WindowCompat.setDecorFitsSystemWindows(window,false);
    
//Night mode off (Only used when you are off Night mode in apps)
AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);