android 读取json数据（遍历JSONObject和JSONArray

 public String getJson(){  
        String jsonString = "{\"FLAG\":\"flag\",\"MESSAGE\":\"SUCCESS\",\"name\":[{\"name\":\"jack\"},{\"name\":\"lucy\"}]}";//json字符串  
        try {  
            JSONObject result = new JSONObject(jsonstring);//转换为JSONObject  
            int num = result.length();  
            JSONArray nameList = result.getJSONArray("name");//获取JSONArray  
            int length = nameList.length();  
            String aa = "";  
            for(int i = 0; i < length; i++){//遍历JSONArray  
                Log.d("debugTest",Integer.toString(i));  
                JSONObject oj = nameList.getJSONObject(i);  
                aa = aa + oj.getString("name")+"|";  
                  
            }  
            Iterator it = result.keys();  
            String aa2 = "";  
            String bb2 = null;  
            while(it.hasNext()){//遍历JSONObject  
                bb2 = (String) it.next().toString();  
                aa2 = aa2 + result.getString(bb2);  
                  
            }  
            return aa;  
        } catch (JSONException e) {  
            throw new RuntimeException(e);  
        }  
    }   http://zhaojianping.blog.51cto.com/725123/629526