1 public static class PlaceholderFragment extends Fragment { 2          3         private Button button; 4  5         public PlaceholderFragment() { 6         } 7  8         @Override 9         public View onCreateView(LayoutInflater inflater, ViewGroup container,10                 Bundle savedInstanceState) {11             View rootView = inflater.inflate(R.layout.fragment_main, container, false);12             13             button = (Button)rootView.findViewById(R.id.buttonId);14             button.setOnClickListener(new OnClickListener() {                15                 public void onClick(View v) {16                     NetworkThread nt = new NetworkThread();17                     nt.start();18                 }19             });20             21             return rootView;22         }23         24         class NetworkThread extends Thread{  //主线程不能访问网路！！！25             @Override26             public void run() {27                 //创建HttpClient28                 HttpClient httpClient = new DefaultHttpClient();29                 //创建代表请求的对象,参数是访问的服务地址30                 //如Baidu就是http://www.baidu.com31                 HttpGet httpGet = new HttpGet("http://www.marschen.com/data1/html");32                 try {33                     //执行请求, 获取服务器发还的相应对象34                     HttpResponse resp = httpClient.execute(httpGet);35                     //检查相应的状态是否正常, 检查状态码是否是20036                     int code = resp.getStatusLine().getStatusCode();37                     if(code == 200){38                         //从相应对象中取值，得到的是流对象39                         HttpEntity entity = resp.getEntity();40                         InputStream in = entity.getContent();41                         BufferedReader reader = new BufferedReader(new InputStreamReader(in));42                         String line = reader.readLine();43                         Log.i("tag","Got From Server: " + line);44                     }45                 } 46                 catch (IOException e) {47                     // TODO Auto-generated catch block48                     e.printStackTrace();49                 }50             }           51         }52     }