Prevent StatusBar from showing when using AlertDialog.Builder

Question

In the XML of my MainActivity, I have programmed it so that it uses a theme with NoActionBar and therefore there is no ac

Answer 1

Latest Working Example

The accepted answer works only for API Level 16 or lower. In newer versions, for AlertDialog do the following:

if (Build.VERSION.SDK_INT < 16) {
    alert.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
} else {
    View decorView = alert.getWindow().getDecorView();
    int uiOptions = View.SYSTEM_UI_FLAG_FULLSCREEN;
    decorView.setSystemUiVisibility(uiOptions);
}