java - 改造将对象数组转换为 GSON 错误

Question

我正在使用 Retrofit 发出返回对象数组的 HTTP 请求，但出现以下错误:

com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY

返回的响应应该是这样的:

[ {key1: "value1", key2: "value2"}, {key1: "value1", key2: "value2"}, ... ]

我有以下类，用于序列化数据:

public class data {
  private List<element> dataList;

  public List<element> getElements() {
   return dataList;
  }

  public class element {
    @SerializedName("key1")
    private String key1;

    @SerializedName("key2")
    private String key2;

    // Getters and Setters
  }
}

如果您有任何想法，请告诉我。谢谢

Answer 1

错误实际上是在我实现 Retrofit Callback 时。在这种情况下，当它应该期待一个数组时，我的实现期待一个对象。感谢大家的帮助。

之前

//*****MyData*****//
public class MyData {
  private List<Data> dataList;

  public List<Data> getElements() {
   return dataList;
  }

  public class Data {
    @SerializedName("key1")
    private String key1;

    @SerializedName("key2")
    private String key2;

    // Getters and Setters
  }
}

//*****Callback Implementation*****//
public class MyDataCallback extends Callback {
   public MyDataCallback(MyDataCallbackListener<MyData> myDataCallbackListener) {
        super(myDataCallbackListener);
    }

    @Override
    public void success(MyData data, Response response) {
        if (myDataCallbackListener != null) {
            myDataCallbackListener.onCallbackComplete(true, response, MyDataCallback.CALLBACK_SUCCESS_MESSAGE, data);
        }
    }
}

之后

//*****Data*****//
public class Data {
    @SerializedName("key1")
    private String key1;

    @SerializedName("key2")
    private String key2;

    // Getters and Setters
}

//*****Callback Implementation*****//
public class MyDataCallback extends Callback {
   public MyDataCallback(MyDataCallbackListener<List<Data>> myDataCallbackListener) {
        super(myDataCallbackListener);
    }

    @Override
    public void success(List<Data> data, Response response) {
        if (myDataCallbackListener != null) {
            myDataCallbackListener.onCallbackComplete(true, response, MyDataCallback.CALLBACK_SUCCESS_MESSAGE, data);
        }
    }
}