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;
    }
}  

Activity

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);
    }
}