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

You should use on style.xml

It makes your activity without your ActionBar!

UPDATED:

I have some code, It should works on you!

ab = new AlertDialog.Builder(MainActivity.this,
                    AlertDialog.THEME_DEVICE_DEFAULT_DARK);

            ab.setNeutralButton("OK", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface arg0, int arg1) {
                }
            });

            ab.setTitle(R.string.welcome_title);
            ab.setMessage(R.string.message);
            ab.create().show();

UPDATED2:

here some code on Java

requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
            WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.main);

and some on XML

Hope it be helpful!