Android json/gson反序列化
我正在尝试解析从 php 文件收到的以下 json 数组：
actionsArray = [["19.431","19.438"],[["8","107"],[]],["u1", "u2"]]
我主要对访问数组 [["8","107"],[]]; 感兴趣但是，我收到错误“com.google.gson.JsonParseException：期望数组但找到对象：名称：null Grams：null 0 操作：null
这是我的代码摘录：
用户类包含：字符串名称；int []操作字符串克；
JSONArray inputarray;
try {
int[] userActionsArray = new int[0];
inputarray = new JSONArray(br.readLine());
JSONArray gramsArray = (JSONArray)inputarray.get(0);
JSONArray actionsArray = (JSONArray)inputarray.get(1);
JSONArray namesArray = (JSONArray) inputarray.get(2);
User[] values = new User[namesArray.length()];
Gson gson = new Gson();
*User userAction = gson.fromJson(inputarray.toString(), User.class);
//error occurs on the above line*
...
I am trying to parse the following json array that I receive from my php file:
actionsArray = [["19.431","19.438"],[["8","107"],[]],["u1","u2"]]
I'm primarily interested in accessing the array [["8","107"],[]]; however, I get the error, "com.google.gson.JsonParseException: Expecting array but found object: Name: null Grams: null 0 Actions: null
Here's an excerpt from my code:
User class contains: String name; int[] actions; String grams
JSONArray inputarray;
try {
int[] userActionsArray = new int[0];
inputarray = new JSONArray(br.readLine());
JSONArray gramsArray = (JSONArray)inputarray.get(0);
JSONArray actionsArray = (JSONArray)inputarray.get(1);
JSONArray namesArray = (JSONArray) inputarray.get(2);
User[] values = new User[namesArray.length()];
Gson gson = new Gson();
*User userAction = gson.fromJson(inputarray.toString(), User.class);
//error occurs on the above line*
...
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当您尝试解析数组但服务作为对象响应时，通常会出现此问题。因此，首先测试您收到的响应，然后尝试进行相应的解析。
This problem occurs usually when you try to parse array but service is responding as object. So first test the response you are getting then try to parse accordingly.
JSONArray来自 org.json，.toString() 方法将其返回为["first","second"]（源可用 此处)您需要您的 JSON 如下所示：
{ myArray : [ "first" ， “第二” ] }让 Gson 解析它...您的 POJO（在您的情况下User.class）应该如下所示：A
JSONArrayis from org.json, which the .toString() method returns as["first","second"](source available here)You need your JSON to look like:
{ myArray : [ "first", "second" ] }for Gson to parse it... Where your POJO (in your caseUser.class) should look like this: