com.google.gson.JsonSyntaxException：java.lang.IllegalStateException：期望一个字符串，但在第1行第10行路径为$ .data时为BEGIN_OBJECT

Question

我的异常为retrofit.RetrofitError: com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected a string but was BEGIN_OBJECT at line 1 column 10 path $.data

我要求数据为：

        RestAdapter loginAdapter = Utils.buildAdapter();
                final ApiConfig signUpApi = loginAdapter.create(ApiConfig.class);
                signUpApi.signUp(new SignupDetailResponse.SignUpDetailRequestBody(email, password, AppConstants.DEVICE_TOKEN, AppConstants.DEVICE_TYPE),
                                new Callback<SignupDetailResponse.SignUpResponseBody>() {
                    @Override
                    public void success(SignupDetailResponse.SignUpResponseBody signUpDetailResponse, Response response) {
                        Long responseCode = signUpDetailResponse.responseCode;
                        Utils.SHOW_TOAST(context, responseCode.toString());
                    }

                    @Override
                    public void failure(RetrofitError retrofitError) {
                        if (retrofitError.getResponse() != null) {
                            Log.i(TAG, retrofitError.toString());
                        }
                    }
                });
            }

在Utils，

中的位置

public static RestAdapter buildAdapter() {
    return new RestAdapter.Builder()
            .setEndpoint(AppConfig.API_BASE_URL)
            .build();

}

我的界面：

public interface ApiConfig {

  @POST("/signUp")
  public void signUp(@Body SignupDetailResponse.SignUpDetailRequestBody signUpDetailRequestBody, Callback<SignupDetailResponse.SignUpResponseBody> signUpDetailResponseCallback);

}

我的LoginResponse：

package com.shubham.network.response;

import com.google.gson.annotations.Expose;

public class SignupDetailResponse {

 public static class SignUpDetailRequestBody {

    final String email;
    final String password;
    final String acType;
    final String deviceType;

    public SignUpDetailRequestBody(String email, String password, String acType, String deviceType) {
        this.email = email;
        this.password = password;
        this.acType = acType;
        this.deviceType = deviceType;
    }

}

public static class SignUpResponseBody {

    @Expose
    public String data;

    @Expose
    public Boolean success;

    @Expose
    public String message;

    @Expose
    public Long responseCode;

    /**
     * @return The data
     */
    public String getData() {
        return data;
    }

    /**
     * @return The success
     */
    public Boolean getSuccess() {
        return success;
    }

    /**
     * @return The message
     */
    public String getMessage() {
        return message;
    }

    /**
     * @return The responseCode
     */
    public Long getResponseCode() {
        return responseCode;
    }
}
}

预期的JSON响应：

{
"data": "1",
"success": true,
"message": "You have successfully SignUp. Please login to your registered email and activate your account",
"responseCode": 8
}

我想我已经正确地构建了我的模型。我还在我的项目中添加了retrofit（1.9.0）和gson（2.3.1）JARS。