public void KillStatusBar() {

    Process proc = null;

    String ProcID = "79"; // HONEYCOMB AND OLDER

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
        ProcID = "42"; // ICS AND NEWER
    }
    if(Build.VERSION.SDK_INT>Build.VERSION_CODES.JELLY_BEAN_MR2){
        return;
    }

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

View decorView = getWindow().getDecorView();
decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN);