读取json

Question

我认为序列名称有问题。我有这个JSON：

{
    "current_page": 1,
    "data": [
        {"Name": "test", "Family": "test"},
        {"Name": "test2", "Family": "test2"}
    ],
    "item_page": 2
}

和一个类：

public class UserFetch(){

@SerializedName("current_page")
@Expose
private int currentPage;

@SerializedName("item_page")
@Expose
private int item_page;

@SerializedName("data")
@Expose
private list<User> users = new ArrayList<>();

public UserFetch(){
}
//getter and setter and another constructor not mentioned

}

并且用户类也被序列化：

public class User(){

@SerializedName("Name")
@Expose
private String Name;

@SerializedName("Family")
@Expose
private String Family;

public User(){
}
//getter and setter and another constructor not mentioned

}

当我调用json wia改造并获取数据时（成功满和另一个变量都像current_page一样工作），但是数组不起作用，当我调用数组项时，将显示IndexOutofBounds。

编辑：：这就是我称呼数组对象的方式：

Call<UserFetch> call = userservice.getAllUsers();
call.enqueue(new Callback<UserFetch>() {
    @Override
    public void onResponse(Call<UserFetch> call, Response<UserFetch> response) {
        if(response.isSuccessful()){
            Toast.makeText(getActivity(), "SuccessFull!", Toast.LENGTH_SHORT).show();
            Toast.makeText(getContext(), response.body().getUsers().get(0).getName(), Toast.LENGTH_SHORT).show();
        }
        else {
            Toast.makeText(getActivity(), "unSuccess", Toast.LENGTH_SHORT).show();
        }
    }

    @Override
    public void onFailure(Call<StoreFetch> call, Throwable t) {
        Toast.makeText(getContext(), "Failure : " + t.getMessage().toString(), Toast.LENGTH_SHORT).show();
    }
});

Answer 1

解决方案：

在UserFetch类中编写User类，如下所示：

public class UserFetch() {

    @SerializedName("current_page")
    @Expose
    public int currentPage;

    @SerializedName("item_page")
    @Expose
    public int item_page;

    @SerializedName("data")
    @Expose
    public list<User> users = new ArrayList<>();

    public class User(){

        @SerializedName("Name")
        @Expose
        public String Name;

        @SerializedName("Family")
        @Expose
        public String Family;

    }

}

代替：

if(response.isSuccessful()){
        Toast.makeText(getActivity(), "SuccessFull!", Toast.LENGTH_SHORT).show();
        Toast.makeText(getContext(), response.body().getUsers().get(0).getName(), Toast.LENGTH_SHORT).show();
}

您的变量必须如图所示是公共的

代替：

if(response.isSuccessful()){
        UserFetch userFetch = response.body();
        List<UserFetch.User> userList = userFetch.users;
        for (UserFetch.User user : userList) {
                Toast.makeText(getApplicationContext(), "name : " + user.Name + " family: " + user.Family, Toast.LENGTH_SHORT).show();
        }
}

如果需要特定的名称和家庭数据，则可以使用传统的for循环。

希望这会起作用。如有疑问，您可以在下面评论。