android - 使用 gson 解析 JSON 对象

Question

我正在尝试像这样解析 JSON:

{"response":[123123, 1231231, 123124, 124124, 111111, 12314]}

有了GSON，制作

Gson gson = new GsonBuilder().create();
int[] friends = new Gson().fromJson(answer, int[].class);
System.out.print(friends[0]);

但是得到 Error Expected BEGIN_ARRAY but was BEGIN_OBJECT at line 1 column 2

如何解析数组中的数字？

Answer 1

您首先要创建一个模型类，GSON 可以将您的 json 绑定(bind)到:

public class ResponseModel {

    private List<Integer> response = new ArrayList<Integer>();

    public List<Integer> getResponse() {
        return response;
    }

    @Override
    public String toString() {
        return "ResponseModel [response=" + response + "]";
    }
}

然后就可以调用了

Gson gson = new Gson();
ResponseModel responseModel = gson.fromJson("{\"response\":[123123, 1231231, 123124, 124124, 111111, 12314]}",
                                            ResponseModel.class);
List <Integer> responses = responseModel.getResponse();
// ... do something with the int list