利用jsoup解析html网页，并显示所需内容
利用jsoup解析html网页，并显示所需内容
onKeyDown --按键按下事件 onKeyUp --按键弹起事件 onTouchEvent --单击屏幕事件 onTrackballEvent --轨迹球事件
通过setContenView切换页面
android网络编程,网址改成百度，可以更好的看到效果
android客户端应用程序
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