android 隐藏虚拟按键

隐藏手机下方虚拟按键，只需执行下面函数即可

private fun hideBottomUi() {
    if (Build.VERSION.SDK_INT >= 19) {
        val decorView = window.decorView
        val uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
        decorView.systemUiVisibility = uiOptions
        window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION)
    } else {
        window.decorView.systemUiVisibility = View.GONE
    }
}