public class JsonActivity extends Activity {     /** Called when the activity is first created. */     private TextView tvJson;     private Button btnJson;     private Button btnJsonMulti;     @Override     public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.main);         tvJson = (TextView) this.findViewById(R.id.tvJson);         btnJson = (Button) this.findViewById(R.id.btnJson);         btnJsonMulti = (Button) this.findViewById(R.id.btnJsonMulti);         btnJson.setOnClickListener(new View.OnClickListener() {             @Override             public void onClick(View v) {                 // url                 // String strUrl = "http://10.158.166.110:8080/AndroidServer/JsonServlet";                 String strUrl = ServerPageUtil.getStrUrl(UrlsOfServer.JSON_SINGER);                 //获得返回的Json字符串                 String strResult = connServerForResult(strUrl);                 //解析Json字符串                 parseJson(strResult);             }         });         btnJsonMulti.setOnClickListener(new View.OnClickListener() {             @Override             public void onClick(View v) {                 String strUrl = ServerPageUtil.getStrUrl(UrlsOfServer.JSON_SINGERS);                 String strResult = connServerForResult(strUrl);                 //获得多个Singer                 parseJsonMulti(strResult);             }         });     }     private String connServerForResult(String strUrl) {         // HttpGet对象         HttpGet httpRequest = new HttpGet(strUrl);         String strResult = "";         try {             // HttpClient对象             HttpClient httpClient = new DefaultHttpClient();             // 获得HttpResponse对象             HttpResponse httpResponse = httpClient.execute(httpRequest);             if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {                 // 取得返回的数据                 strResult = EntityUtils.toString(httpResponse.getEntity());             }         } catch (ClientProtocolException e) {             tvJson.setText("protocol error");             e.printStackTrace();         } catch (IOException e) {             tvJson.setText("IO error");             e.printStackTrace();         }         return strResult;     }     // 普通Json数据解析     private void parseJson(String strResult) {         try {             JSONObject jsonObj = new JSONObject(strResult).getJSONObject("singer");             int id = jsonObj.getInt("id");             String name = jsonObj.getString("name");             String gender = jsonObj.getString("gender");             tvJson.setText("ID号"+id + ", 姓名：" + name + ",性别：" + gender);         } catch (JSONException e) {             System.out.println("Json parse error");             e.printStackTrace();         }     }     //解析多个数据的Json    private void parseJsonMulti(String strResult) {         try {             JSONArray jsonObjs = new JSONObject(strResult).getJSONArray("singers");             String s = "";             for(int i = 0; i < jsonObjs.length() ; i++){                 JSONObject jsonObj = ((JSONObject)jsonObjs.opt(i))                 .getJSONObject("singer");                 int id = jsonObj.getInt("id");                 String name = jsonObj.getString("name");                 String gender = jsonObj.getString("gender");                 s +=  "ID号"+id + ", 姓名：" + name + ",性别：" + gender+ "\n" ;             }             tvJson.setText(s);         } catch (JSONException e) {             System.out.println("Jsons parse error !");             e.printStackTrace();         }     } }