在android中创建一个线程不工作

Question

我有一个方法，我打电话，但是，对于较新版本的Android它失败。显然，这是由于缺少线程。我的方法是发送一条消息到我的服务器。这是代码（SANS线程）

public String sendMessage(String username, Editable message){ 
     BufferedReader in = null; 
     String data = null; 

     try{ 
      DefaultHttpClient client = new DefaultHttpClient(); 
      URI website = new URI("http://abc.com/user_send.php?username="+username+"&message="+message); 

      HttpPost post_request = new HttpPost(); 
      post_request.setURI(website); 


      HttpGet request = new HttpGet(); 

      request.setURI(website); 
      //executing actual request 
      HttpResponse response = client.execute(request); 

      in = new BufferedReader(new InputStreamReader(response.getEntity().getContent())); 
      StringBuffer sb = new StringBuffer(""); 
      String l = ""; 
      String nl = System.getProperty("line.separator"); 
      while ((l = in.readLine()) != null) { 
       sb.append(l); 

      } 
      in.close(); 
      data = sb.toString(); 
      return data; 
     }catch (Exception e){ 
      return "ERROR"; 
     } 
    } 

现在，只是试图把一个线程它周围：

public String sendMessage(String username, Editable message){ 
     BufferedReader in = null; 
     String data = null; 
Thread sendThread = new Thread(){ 
     try{ 
      DefaultHttpClient client = new DefaultHttpClient(); 
      URI website = new URI("http://thenjtechguy.com/njit/gds/user_send.php?username="+username+"&message="+message); 

      HttpPost post_request = new HttpPost(); 
      post_request.setURI(website); 


      HttpGet request = new HttpGet(); 

      request.setURI(website); 
      //executing actual request 
      HttpResponse response = client.execute(request); 

      in = new BufferedReader(new InputStreamReader(response.getEntity().getContent())); 
      StringBuffer sb = new StringBuffer(""); 
      String l = ""; 
      String nl = System.getProperty("line.separator"); 
      while ((l = in.readLine()) != null) { 
       sb.append(l); 

      } 
      in.close(); 
      data = sb.toString(); 
      return data; 
     }catch (Exception e){ 
      return "ERROR"; 
     } 
} sendThread.start(); 
} 

但是，这并不工作。我究竟做错了什么？另外，如果你注意到我打破了关于HttpClient的任何基本规则，请让我知道。

Answer 1

更好的一个头，并使用AsyncTask的概念。

AsyncTask支持正确和方便地使用UI线程。该类允许执行后台操作并在UI线程上发布结果，而无需操纵线程和/或处理程序。 请参阅本LINK样品实施

Answer 2

你的实现是不正确的 - 你不重写run（）方法

class SendThread extends Thread { 
    public void run(){ 
     //add your implementation here 
    } 
} 

拖车启动线程

SendThread sendThread = new SendThread(); 
sendThread.start();