Android强制虚拟隐藏导航栏

if (Build.VERSION.SDK_INT > 14) {
            View decorView = getWindow().getDecorView();
            // Hide both the navigation bar and the status bar.
            // SYSTEM_UI_FLAG_FULLSCREEN is only available on Android 4.1 and higher, but as
            // a general rule, you should design your app to hide the status bar whenever you
            // hide the navigation bar.
            int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
//                    | View.SYSTEM_UI_FLAG_FULLSCREEN;//
            decorView.setSystemUiVisibility(uiOptions);
        }