隐藏底部虚拟导航栏

protectedvoidhideBottomUIMenu(){

//隐藏虚拟按键，并且全屏

if(Build.VERSION.SDK_INT >11&& Build.VERSION.SDK_INT <19) {// lower api

View v =this.getWindow().getDecorView();

            v.setSystemUiVisibility(View.GONE);

}elseif(Build.VERSION.SDK_INT >=19) {

//for new api versions.

            View decorView = getWindow().getDecorView();

intuiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION

                            | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY | View.SYSTEM_UI_FLAG_FULLSCREEN;

            decorView.setSystemUiVisibility(uiOptions);

        }

    }