override fun onDestroy()
{
content.removeView(webView)
webView.stopLoading()
// 退出时调用此方法,移除绑定的服务,否则某些特定系统会报错
webView.settings.javaScriptEnabled = false
webView.clearHistory()
webView.clearView()
webView.removeAllViews()
webView.destroy()
super.onDestroy()
android.os.Process.killProcess(android.os.Process.myPid())
}