[入门阅读]怎样在android中解析JSON

JSON入门介绍：http://kirin.iteye.com/blog/616226

也参考了此篇：http://blog.163.com/fushaolin@126/blog/static/16341724220108244251686/

json数据格式解析我自己分为两种：一种是普通的，一种是带有数组形式的：http://archive.cnblogs.com/a/1925327/

先实例化个JSONObject对象

JSONObject aJosnObj = new JSONObject(jsonStr);//jsonStr为对应json字符串数据

然后再根据json数据的实际情况调用有关方法。

这是一个利用JSON定位的例子：

/** 
  * Google定位的实现.<br/> 
  * Geolocation的详细信息请参见：<br/> 
  * <a 
  * href="http://code.google.com/apis/gears/geolocation_network_protocol.html" mce_href="http://code.google.com/apis/gears/geolocation_network_protocol.html"> 
  * http://code.google.com/apis/gears/geolocation_network_protocol.html</a> 
  */  
public class LocationAct extends Activity {  
     private TextView txtInfo;  
     public void onCreate(Bundle savedInstanceState) {  
         super.onCreate(savedInstanceState);  
         setContentView(R.layout.main);  
         Button btn = (Button) findViewById(R.id.btnStart);  
         txtInfo = (TextView) findViewById(R.id.txtInfo);  
         btn.setOnClickListener(new Button.OnClickListener() {  
             public void onClick(View view) {  
                 getLocation();  
             }  
         });  
     }  
     private void getLocation() {  
         TelephonyManager tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);  
         GsmCellLocation gsmCell = (GsmCellLocation) tm.getCellLocation();  
         int cid = gsmCell.getCid();  
         int lac = gsmCell.getLac();  
         String netOperator = tm.getNetworkOperator();  
         int mcc = Integer.valueOf(netOperator.substring(0, 3));  
         int mnc = Integer.valueOf(netOperator.substring(3, 5));  
         JSONObject holder = new JSONObject();  
         JSONArray array = new JSONArray();  
         JSONObject data = new JSONObject();  
         try {  
             holder.put("version", "1.1.0");  
             holder.put("host", "maps.google.com");  
             holder.put("address_language", "zh_CN");  
             holder.put("request_address", true);  
             holder.put("radio_type", "gsm");  
             holder.put("carrier", "HTC");  
             data.put("cell_id", cid);  
             data.put("location_area_code", lac);  
             data.put("mobile_countyr_code", mcc);  
             data.put("mobile_network_code", mnc);  
             array.put(data);  
             holder.put("cell_towers", array);  
         } catch (JSONException e) {  
             e.printStackTrace();  
         }  
         DefaultHttpClient client = new DefaultHttpClient();  
         HttpPost httpPost = new HttpPost("http://www.google.com/loc/json");  
         StringEntity stringEntity = null;  
         try {  
             stringEntity = new StringEntity(holder.toString());  
         } catch (UnsupportedEncodingException e) {  
             e.printStackTrace();  
         }  
         httpPost.setEntity(stringEntity);  
         HttpResponse httpResponse = null;  
         try {  
             httpResponse = client.execute(httpPost);  
         } catch (ClientProtocolException e) {  
             e.printStackTrace();  
         } catch (IOException e) {  
             e.printStackTrace();  
         }  
         HttpEntity httpEntity = httpResponse.getEntity();  
         InputStream is = null;  
         try {  
             is = httpEntity.getContent();  
         } catch (IllegalStateException e) {  
             e.printStackTrace();  
         } catch (IOException e) {  
             // TODO Auto-generated catch block  
             e.printStackTrace();  
         }  
         InputStreamReader isr = new InputStreamReader(is);  
         BufferedReader reader = new BufferedReader(isr);  
         StringBuffer stringBuffer = new StringBuffer();  
         try {  
             String result = "";  
             while ((result = reader.readLine()) != null) {  
                 stringBuffer.append(result);  
             }  
         } catch (IOException e) {  
             e.printStackTrace();  
         }  
         txtInfo.setText(stringBuffer.toString());  
     }  
}