Activity Fullscreen

fullscreen.java

    @Override
    public void onWindowFocusChanged(boolean hasFocus) {
        super.onWindowFocusChanged(hasFocus);
        if (hasFocus) {
            if (Build.VERSION.SDK_INT < 16) {
                getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                        WindowManager.LayoutParams.FLAG_FULLSCREEN);
            } else {
                View decorView = getWindow().getDecorView();
                int uiOptions = View.SYSTEM_UI_FLAG_FULLSCREEN;
                decorView.setSystemUiVisibility(uiOptions);
            }
        }
    }