Cant Hide Notification bar in Android 4.3 API 18

Question

Prior to 4.3,

@android:style/Theme.Black.NoTitleBar  

and

 requestWindowFeature(Window.FEATURE_NO_TITLE);
 getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
 WindowManager.LayoutParams.FLAG_FULLSCREEN);`

works perfectly to hide the Notification bar. But in 4.3 though the bar is not showing using this code but sliding at the top bring the bar

Answer 1

I found out there is no simple way to do it. So I use bit of reflection and its working fine.

Object service  = getSystemService("statusbar");
Class<?> statusbarManager = Class.forName("android.app.StatusBarManager");
Method collapse = statusbarManager.getMethod("collapsePanels");
collapse .setAccessible(true);
collapse .invoke(service);

Don't forget to add this in manifest.

<uses-permission android:name="android.permission.EXPAND_STATUS_BAR" />

Answer 2

Have you tried using Theme.Black.NoTitleBar.Fullscreen?