Android 隐藏状态栏和虚拟按键的通用方法

//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);} else if (Build.VERSION.SDK_INT >= 19) {      //for new api versions.      View decorView = getWindow().getDecorView();      int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION                    | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY | View.SYSTEM_UI_FLAG_FULLSCREEN;      decorView.setSystemUiVisibility(uiOptions);}