android 使用现成做get请求

       //接受子线程发来的消息
       Handler    hanler = new Handler() {
            @Override
            public void handleMessage(Message msg) {
                // //执行接收到的通知，更新UI 此时执行的顺序是按照队列进行，即先进先出
                super.handleMessage(msg);
                Bundle B=msg.getData();

            }

//创建一个子线程
Thread thread = new Thread(new Runnable() {
            @Override
            public void run() {
                // TODO Auto-generated method stub
                String str = "1";
                HttpGet get = new HttpGet(
                        "http://api.map.baidu.com/geoconv/v1/?coords=114.21892734521,29.575429778924;114.21892734521,29.575429778924&ak=E4805d16520de693a3fe707cdc962045&output=json");

                try {
                    DefaultHttpClient client = new DefaultHttpClient();

                    HttpResponse respon = client.execute(get);
                    if (respon.getStatusLine().getStatusCode() == 200) {
                        str = EntityUtils.toString(respon.getEntity());
                    }

                } catch (ClientProtocolException e) {
                    Toast.makeText(getApplicationContext(), "错误1",
                            Toast.LENGTH_SHORT).show();

                } catch (IOException e) {
                    Toast.makeText(getApplicationContext(), "错误2",
                            Toast.LENGTH_SHORT).show();

                }
                Message message = new Message();
                message.what = 1;
                Bundle b = new Bundle();
                b.putString("h", str);
                message.setData(b);
　　　　　　　　　//通知 Hanler
                hanler.sendMessage(message);
            }
        });
        thread.start();