Android GSON需要BEGIN_ARRAY，但在第1行第2列是BEGIN_OBJECT

Question

{
  "Message": "The request is invalid.",
  "ModelState": {
    "": [
      "Name [e-mail] is already taken.",
      "Email '[e-mail]' is already taken."
    ]
  }
}

ErrorRequest page = gson.fromJson(response.getResponseString(), ErrorRequest.class);

package com.devinedesign.cleanride.domain;

import com.google.gson.annotations.SerializedName;

import java.util.ArrayList;
import java.util.List;

public class ErrorRequest
{
    @SerializedName("Message")
    private String message;

    @SerializedName("ModelState")
    private List<ModelState> modelState;

    public ErrorRequest(String message,List<ModelState> modelState)
    {
        this.message    = message;
        this.modelState = modelState;
    }

    public String getMessage()
    {
        return message;
    }

    public void setMessage(String message)
    {
        this.message = message;
    }

    public List<ModelState> getModelState()
    {
        return modelState;
    }

    public void setModelState(List<ModelState> modelState)
    {
        this.modelState = modelState;
    }
}

package com.devinedesign.cleanride.domain;

import com.google.gson.annotations.SerializedName;


public class ModelState
{
    @SerializedName("ModelState")
    private String modelState;

    public ModelState(String modelState)
    {
        this.modelState = modelState;
    }

    public String getModelState() {
        return modelState;
    }

    public void setModelState(String modelState) {
        this.modelState = modelState;
    }
}

Answer 1

这里的ModelState是一个对象。

"ModelState": {

但是，您将它声明为列表，因此Gson试图解析数组。

@SerializedName("ModelState")
private List<ModelState> modelState;

你可以用

@SerializedName("ModelState")
private ModelState modelState;

{
    "": [
      "Name [e-mail] is already taken.",
      "Email '[e-mail]' is already taken."
    ]
}