预期字符串但是BEGIN_OBJECT错误

Question

我有以下JSON，代码和模型：

这是JSON

的有线格式

{
  "success": "false",
  "http": "ok",
  "status_code": "200",
  "invoice_detail": {
    "notifications": [
      {
        "quantity": "414",
        "price": "5412",
        "total_price": "15748",
        "name": "Axel_Item_5412"
      },
      {
        "quantity": "414",
        "price": "5412",
        "total_price": "15748",
        "name": "Axel_Item_5412"
      },
      {
        "quantity": "414",
        "price": "5412",
        "total_price": "15748",
        "name": "Axel_Item_5412"
      },
      {
        "quantity": "414",
        "price": "5412",
        "total_price": "15748",
        "name": "Axel_Item_5412"
      },
      {
        "quantity": "414",
        "price": "5412",
        "total_price": "15748",
        "name": "Axel_Item_5412"
      },
      {
        "quantity": "414",
        "price": "5412",
        "total_price": "15748",
        "name": "Axel_Item_5412"
      },
      {
        "quantity": "414",
        "price": "5412",
        "total_price": "15748",
        "name": "Axel_Item_5412"
      },
      {
        "quantity": "414",
        "price": "5412",
        "total_price": "15748",
        "name": "Axel_Item_5412"
      }
    ]
  },
  "sgst": "125478122"
}

这是retrofitCall方法

private void retrofitCall() {
    String url= "http://www.amock.io/api/imran.cyber/get-fake";
    Call<ListModel> call= apiInterface.getList("", url);
    call.enqueue(new Callback<ListModel>() {
        @Override
        public void onResponse(Call<ListModel> call, Response<ListModel> response) {
            if (response.isSuccessful()){
                String s= response.body().getInvoice_detail();
                Log.e(TAG, "onResponse: "+s);
            }
        }

        @Override
        public void onFailure(Call<ListModel> call, Throwable t) {
            Log.e(TAG, "onFailure: "+t.getMessage());
        }
    });
}

这是模型类

public class ListModel {

@SerializedName("invoice_detail")
public String invoice_detail;

public ListModel(String invoice_detail) {
    this.invoice_detail = invoice_detail;
}

public String getInvoice_detail() {
    return invoice_detail;
}

public void setInvoice_detail(String invoice_detail) {
    this.invoice_detail = invoice_detail;
}

我收到了这个错误：

  

11-08 10：09：18.489 3578-3578 /？ E / MainActivity :: onFailure：java.lang.IllegalStateException：期望一个字符串，但在第5行第22行路径为$ .invoice_detail

的BEGIN_OBJECT

我不确定出了什么问题：我的JSON，我的代码还是我的模特？

Answer 1

在您的ListModel中声明字段String invoice_detail，但在您的JSON中，invoice_detail是另一个对象，而不是字符串，因此您会收到该错误消息。

如果要完全解析JSON，则需要定义另外两个模型来处理发票。包含通知的发票明细：

public class InvoiceDetailModel {
    public InvoiceNotificationModel[] notifications;

    public InvoiceNotificationModel[] getNotifications() {
        return notifications;
    }
}

以及通知本身的模型：

public class InvoiceNotificationModel {
    public String quantity;
    public String price;
    public String total_price;
    public String name;

    // any getter methods here...
}

然后，您可以在InvoiceDetailModel invoice_detail中使用String invoice_detail代替ListModel。