android 数据传输之JSON

JSON(JavaScript Object Notation) 是一种轻量级的数据交换格式。

对json就不做大篇幅的介绍了。有关json的内容请自己学习。

现在说一下。json在android 的应该。

单个对象：

void buildObject()   {       String staticObject = "{\"firstname\":\"Steve\",\"lastname\":\"Jobs\",\"cellphones\":\"0\"}";    try       {   JSONObject obj = new JSONObject(staticObject);           String x = obj.get("firstname").toString() + " " + obj.get("lastname").toString() + " has " + obj.getInt("cellphones") + " Android phones.";        Log.i("json",x);    }       catch (JSONException je)       {       }      }

数组对象：

void buildJson(){              try {        InputStream is = getAssets().open("json.xml");            byte [] buffer = new byte[is.available()] ;             is.read(buffer);            String json = new String(buffer,"utf-8");               JSONArray roomPicNumUrlArray = new JSONArray(json);                for(int j =0; j < roomPicNumUrlArray.length(); j++){                    JSONObject roomPicNumUrlObject = roomPicNumUrlArray.getJSONObject(j);                    String firstName = roomPicNumUrlObject.get("firstName").toString();                    String lastName = roomPicNumUrlObject.get("lastName").toString();                    String email = roomPicNumUrlObject.get("email").toString();                    Log.i("person","firstName:"+firstName+"\tlastName:"+lastName+"\temail:"+email);                }                                } catch (Exception e) {            e.printStackTrace();        }}

json.xml 文件保存到assets包下：

[{"firstName": "Brett", "lastName":"McLaughlin", "email": "aaaa" },{"firstName": "Jason", "lastName":"Hunter", "email": "bbbb"},{"firstName": "Elliotte", "lastName":"Harold", "email": "cccc" }]

结果图:

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