BEGIN_ARRAY 但为 BEGIN_OBJECT答案

【问题标题】：BEGIN_ARRAY but was BEGIN_OBJECTBEGIN_ARRAY 但为 BEGIN_OBJECT
【发布时间】：2017-09-05 17:55:48
【问题描述】：

我对 GSON 很陌生，
几天前有人建议使用 GSON，我在这里寻求帮助。
我正在尝试解析此响应，但我收到了上述错误..

{
  "status": 4,
  "data": {
    "id": 15,
    "user_id": 1,
    "sub_contractor_id": 1,
    "battery_id": 1,
    "user_long": "120.8922933",
    "user_lat": "14.8185964",
    "rider_long": "121.029015",
    "rider_lat": "14.6496133",
    "user_address_location": "313 Bantayan St, Balagtas, 3016 Bulacan, Philippines",
    "complete": 1,
    "created_at": "2017-04-09 15:22:07",
    "updated_at": "2017-04-09 15:26:16",
    "deleted_at": null,
    "user": {
      "id": 1,
      "user_group_id": 3,
      "email": "customer@motolite.com",
      "created_at": null,
      "updated_at": null,
      "deleted_at": null
    },
    "battery": {
      "id": 1,
      "model": "Enduro",
      "size": "DIN44",
      "price": 2000,
      "created_at": null,
      "updated_at": null,
      "deleted_at": null
    }
  }
}

我刚刚得到“状态”部分，但得到了错误。

private void fetchPosts() {
        StringRequest request = new StringRequest(Request.Method.POST, ENDPOINT, onPostsLoaded, onPostsError) {
            @Override
            protected Map<String, String> getParams() throws AuthFailureError {
                Map<String, String> params = new HashMap<>();
                params.put("booking_id", "15");
                return params;
            }
        };

        requestQueue.add(request);
    }

    private final Response.Listener<String> onPostsLoaded = new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            Log.e("TAG", response);
            List<ModelBooking> posts = Arrays.asList(gson.fromJson(response, ModelBooking[].class));
            for (ModelBooking post : posts) {
                Log.e("TAG", post.status);
            }
        }
    };

    private final Response.ErrorListener onPostsError = new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            Log.e("TAG", error.toString());
        }
    };

对于我的模型。

public class ModelBooking {
    @SerializedName("status")
    String status;
}

【问题讨论】：

我相信你的问题是重复的，你可以在互联网上找到答案。比如看看：stackoverflow.com/questions/9598707/…
GSON Expected BEGIN_ARRAY but was BEGIN_OBJECT的可能重复

标签： android android-studio gson android-volley

【解决方案1】：

您的 JSON 字符串是一个对象（以 { 开头），而不是数组（以 [ 开头）。所以你的代码会是这样的：

private final Response.Listener<String> onPostsLoaded = new Response.Listener<String>() {
    @Override 
    public void onResponse(String response) {
        Log.e("TAG", response);
        ModelBooking post = gson.fromJson(response, ModelBooking.class));
        Log.e("TAG", post.status);
    }  
};

【讨论】：