java - Android从字符串数组中获取volley数据

Question

AM 使用 android volley 发送请求并得到如下响应

   public void onResponse(JSONObject response

       try {
           String responsedata = response.getString("data");

              Log.i("test",responsedata);
            } catch (JSONException e) {
               e.printStackTrace();
           }

     }

上面的日志打印

[{"id":1,"identifier":"TYam Plant","header_val":"tyamplant"},
 {"id":2,"identifier":"Touron Plant","header_val":"toroun"}
]

现在我想循环这些并提取一组单独的属性

id, identifier, header_val

我该如何解决这个问题。我对java还是新手

Answer 1

You response is JSONArray not JSONObject check it

您需要使用 JSONArray 请求，而不是 volley 的 JSONObject 请求

尝试解析你的 json

    try {
        JSONArray jsonArray= new JSONArray(responsedata);
        for (int i=0;i<jsonArray.length();i++){
            JSONObject object=jsonArray.getJSONObject(i);
            String id=object.getString("id");
            String identifier=object.getString("identifier");
            String header_val=object.getString("header_val");
        }

    } catch (JSONException e) {
        e.printStackTrace();
    }

最好使用 google-gson-library 解析您的 JSON

Gson is a Java library that can be used to convert Java Objects into their JSON representation. It can also be used to convert a JSON string to an equivalent Java object. Gson can work with arbitrary Java objects including pre-existing objects that you do not have source-code of

示例:How to Parse JSON Array with Gson