Android在线程中发送GET和POST请求 在主线程更新UI

public class GetPostUtil  
{  
    /** 
     * 向指定URL发送GET方法的请求 
     *  
     * @param url 
     *            发送请求的URL 
     * @param params 
     *            请求参数，请求参数应该是name1=value1&name2=value2的形式。 
     * @return URL所代表远程资源的响应 
     */  
    public static String sendGet(String url, String params)  
    {  
        String result = "";  
        BufferedReader in = null;  
        try  
        {  
            String urlName = url + "?" + params;  
            URL realUrl = new URL(urlName);  
            // 打开和URL之间的连接  
            URLConnection conn = realUrl.openConnection();  
            // 设置通用的请求属性  
            conn.setRequestProperty("accept", "*/*");  
            conn.setRequestProperty("connection", "Keep-Alive");  
            conn.setRequestProperty("user-agent",  
                "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)");  
            // 建立实际的连接  
            conn.connect();  
            // 获取所有响应头字段  
            Map<String, List<String>> map = conn.getHeaderFields();  
            // 遍历所有的响应头字段  
            for (String key : map.keySet())  
            {  
                System.out.println(key + "--->" + map.get(key));  
            }  
            // 定义BufferedReader输入流来读取URL的响应  
            in = new BufferedReader(  
                new InputStreamReader(conn.getInputStream()));  
            String line;  
            while ((line = in.readLine()) != null)  
            {  
                result += "\n" + line;  
            }  
        }  
        catch (Exception e)  
        {  
            System.out.println("发送GET请求出现异常！" + e);  
            e.printStackTrace();  
        }  
        // 使用finally块来关闭输入流  
        finally  
        {  
            try  
            {  
                if (in != null)  
                {  
                    in.close();  
                }  
            }  
            catch (IOException ex)  
            {  
                ex.printStackTrace();  
            }  
        }  
        return result;  
    }  
  
    /**  
     * 向指定URL发送POST方法的请求  
     *   
     * @param url  
     *            发送请求的URL  
     * @param params  
     *            请求参数，请求参数应该是name1=value1&name2=value2的形式。  
     * @return URL所代表远程资源的响应  
     */  
    public static String sendPost(String url, String params)  
    {  
        PrintWriter out = null;  
        BufferedReader in = null;  
        String result = "";  
        try  
        {  
            URL realUrl = new URL(url);  
            // 打开和URL之间的连接  
            URLConnection conn = realUrl.openConnection();  
            // 设置通用的请求属性  
            conn.setRequestProperty("accept", "*/*");  
            conn.setRequestProperty("connection", "Keep-Alive");  
            conn.setRequestProperty("user-agent",  
                "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)");  
            // 发送POST请求必须设置如下两行  
            conn.setDoOutput(true);  
            conn.setDoInput(true);  
            // 获取URLConnection对象对应的输出流  
            out = new PrintWriter(conn.getOutputStream());  
            // 发送请求参数  
            out.print(params);  
            // flush输出流的缓冲  
            out.flush();  
            // 定义BufferedReader输入流来读取URL的响应  
            in = new BufferedReader(  
                new InputStreamReader(conn.getInputStream()));  
            String line;  
            while ((line = in.readLine()) != null)  
            {  
                result += "\n" + line;  
            }  
        }  
        catch (Exception e)  
        {  
            System.out.println("发送POST请求出现异常！" + e);  
            e.printStackTrace();  
        }  
        // 使用finally块来关闭输出流、输入流  
        finally  
        {  
            try  
            {  
                if (out != null)  
                {  
                    out.close();  
                }  
                if (in != null)  
                {  
                    in.close();  
                }  
            }  
            catch (IOException ex)  
            {  
                ex.printStackTrace();  
            }  
        }  
        return result;  
    }  
}  

public class GetPostMain extends Activity  
{  
    Button get , post;  
    EditText show;  
    @Override  
    public void onCreate(Bundle savedInstanceState)  
    {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.main);  
        get = (Button) findViewById(R.id.get);  
        post = (Button) findViewById(R.id.post);  
        show = (EditText)findViewById(R.id.show);  
        //利用Handler更新UI  
        final Handler h = new Handler(){  
            @Override  
            public void handleMessage(Message msg) {  
                if(msg.what==0x123){  
                    show.setText(msg.obj.toString());  
                }  
            }  
        };  
          
        get.setOnClickListener(new OnClickListener()  
        {  
            @Override  
            public void onClick(View v)  
            {  
                new Thread(new AccessNetwork("GET", "http://192.168.1.88:8080/abc/a.jsp", null, h)).start();  
            }             
        });  
        post.setOnClickListener(new OnClickListener()  
        {  
            @Override  
            public void onClick(View v)  
            {  
                new Thread(new AccessNetwork("POST", "http://192.168.1.88:8080/abc/login.jsp", "name=crazyit.org&pass=leegang", h)).start();  
            }             
        });   
    }  
}  
class AccessNetwork implements Runnable{  
    private String op ;  
    private String url;  
    private String params;  
    private Handler h;  
      
    public AccessNetwork(String op, String url, String params,Handler h) {  
        super();  
        this.op = op;  
        this.url = url;  
        this.params = params;  
        this.h = h;  
    }  
  
    @Override  
    public void run() {  
        Message m = new Message();  
        m.what = 0x123;  
        if(op.equals("GET")){  
            Log.i("iiiiiii","发送GET请求");  
            m.obj = GetPostUtil.sendGet(url, params);  
            Log.i("iiiiiii",">>>>>>>>>>>>"+m.obj);  
        }  
        if(op.equals("POST")){  
            Log.i("iiiiiii","发送POST请求");  
            m.obj = GetPostUtil.sendPost(url, params);  
            Log.i("gggggggg",">>>>>>>>>>>>"+m.obj);  
        }  
        h.sendMessage(m);  
    }  
}