【问题标题】:Recycler View (Xamarin Android )回收站视图 (Xamarin Android )
【发布时间】:2017-03-19 04:19:22
【问题描述】:

我使用 Xamarin 为 Android 编写应用程序。

我尝试制作回收站视图。

这是我的 json:http://pastebin.com/rL214a2T

我有这样的课程:

 public class Billing
{
    public string first_name { get; set; }
    public string last_name { get; set; }
    public string company { get; set; }
    public string address_1 { get; set; }
    public string address_2 { get; set; }
    public string city { get; set; }
    public string state { get; set; }
    public string postcode { get; set; }
    public string country { get; set; }
    public string email { get; set; }
    public string phone { get; set; }
}

public class Shipping
{
    public string first_name { get; set; }
    public string last_name { get; set; }
    public string company { get; set; }
    public string address_1 { get; set; }
    public string address_2 { get; set; }
    public string city { get; set; }
    public string state { get; set; }
    public string postcode { get; set; }
    public string country { get; set; }
}

public class Result
{
    public int id { get; set; }
    public int parent_id { get; set; }
    public string status { get; set; }
    public string order_key { get; set; }
    public int number { get; set; }
    public string currency { get; set; }
    public string version { get; set; }
    public bool prices_include_tax { get; set; }
    public string date_created { get; set; }
    public string date_modified { get; set; }
    public int customer_id { get; set; }
    public string discount_total { get; set; }
    public string discount_tax { get; set; }
    public string shipping_total { get; set; }
    public string shipping_tax { get; set; }
    public string cart_tax { get; set; }
    public string total { get; set; }
    public string total_tax { get; set; }
    //public List<Billing> billing { get; set; }
    public Billing billing { get; set; }
    public Shipping shipping { get; set; }
    public string payment_method { get; set; }
    public string payment_method_title { get; set; }
    public string transaction_id { get; set; }
    public string customer_ip_address { get; set; }
    public string customer_user_agent { get; set; }
    public string created_via { get; set; }
    public string customer_note { get; set; }
    public string date_completed { get; set; }
    public string date_paid { get; set; }
    public string cart_hash { get; set; }
    public List<object> line_items { get; set; }
    public List<object> tax_lines { get; set; }
    public List<object> shipping_lines { get; set; }
    public List<object> fee_lines { get; set; }
    public List<object> coupon_lines { get; set; }
    public List<object> refunds { get; set; }
}

public class RootObject
{
    public List<Result> results { get; set; }
}

我这样写课:

 using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading.Tasks;
using ModernHttpClient;
using Newtonsoft.Json;

namespace StarWars.Api.Repository
{
    public class MoviesRepository
    {
        public async Task<RootObject> GetAllFilms()
        {
            var httpClient = GetHttpClient();

            var response = await httpClient.GetAsync(ServiceEndPoints.StartWarsApiBaseUri).ConfigureAwait(false);

            if (response.IsSuccessStatusCode)
            {
                var content = response.Content;

                string jsonString = await content.ReadAsStringAsync().ConfigureAwait(false);


                return JsonConvert.DeserializeObject<RootObject>(jsonString);
            }
            return new RootObject();
        }

        private HttpClient GetHttpClient()
        {
            var httpClient = new HttpClient(new NativeMessageHandler())
            {
                BaseAddress = new Uri(ServiceEndPoints.StartWarsApiBaseUri)
            };


            httpClient.DefaultRequestHeaders.Accept.Clear();

            httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

            return httpClient;
        }
    }

    public class ServiceEndPoints
    {
        public static readonly string StartWarsApiBaseUri = "http://api.simplegames.com.ua/index.php/?wc_orders=processing_orders";
       // public static readonly string GetFilmsUri = "films";
    }
}

但是当我尝试启动应用程序时出现此错误

Newtonsoft.Json.JsonSerializationException: Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'StarWars.Api.Repository.RootObject' because the type requires a JSON object (e.g. {"name":"value"}) to deserialize correctly.

To fix this error either change the JSON to a JSON object (e.g. {"name":"value"}) or change the deserialized type to an array or a type that implements a collection interface (e.g. ICollection, IList) like List<T> that can be deserialized from a JSON array. JsonArrayAttribute can also be added to the type to force it to deserialize from a JSON array.

据我所知,我需要设置

我该如何解决?

更新

使用 Resharper 我重新制作这样的代码

 public async Task<List<RootObject>> GetAllFilms()
    {
        var httpClient = GetHttpClient();

        var response = await httpClient.GetAsync(ServiceEndPoints.StartWarsApiBaseUri).ConfigureAwait(false);

        if (response.IsSuccessStatusCode)
        {
            var content = response.Content;

            string jsonString = await content.ReadAsStringAsync().ConfigureAwait(false);


            return JsonConvert.DeserializeObject<List<RootObject>>(jsonString);
        }
        return new List<RootObject>();
    }

    private HttpClient GetHttpClient()
    {
        var httpClient = new HttpClient(new NativeMessageHandler())
        {
            BaseAddress = new Uri(ServiceEndPoints.StartWarsApiBaseUri)
        };


        httpClient.DefaultRequestHeaders.Accept.Clear();

        httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

        return httpClient;
    }
}

public class ServiceEndPoints
{
    public static readonly string StartWarsApiBaseUri = "http://api.simplegames.com.ua/index.php/?wc_orders=processing_orders";
   // public static readonly string GetFilmsUri = "films";
}

}

但我在这一行的 MainActivity 中有错误 var moviesAdapter = new MovieAdapter(films.results)

这里是错误

错误 CS1061“列表”不包含“结果”的定义,并且找不到接受“列表”类型的第一个参数的扩展方法“结果”(您是否缺少 using 指令或程序集引用?)

【问题讨论】:

标签: c# android json xamarin.android


【解决方案1】:

您需要更改模型类,如果您不知道应该如何查看模型类,您可以使用json2sharp 之类的工具。你不能使用你的类反序列化JSON。使用此类代替您的。

public class Billing
{
    public string first_name { get; set; }
    public string last_name { get; set; }
    public string company { get; set; }
    public string address_1 { get; set; }
    public string address_2 { get; set; }
    public string city { get; set; }
    public string state { get; set; }
    public string postcode { get; set; }
    public string country { get; set; }
    public string email { get; set; }
    public string phone { get; set; }
}

public class Shipping
{
    public string first_name { get; set; }
    public string last_name { get; set; }
    public string company { get; set; }
    public string address_1 { get; set; }
    public string address_2 { get; set; }
    public string city { get; set; }
    public string state { get; set; }
    public string postcode { get; set; }
    public string country { get; set; }
}

public class LineItem
{
    public int id { get; set; }
    public string name { get; set; }
    public string sku { get; set; }
    public int product_id { get; set; }
    public int variation_id { get; set; }
    public int quantity { get; set; }
    public string tax_class { get; set; }
    public string price { get; set; }
    public string subtotal { get; set; }
    public string subtotal_tax { get; set; }
    public string total { get; set; }
    public string total_tax { get; set; }
    public List<object> taxes { get; set; }
    public List<object> meta { get; set; }
}

public class ShippingLine
{
    public int id { get; set; }
    public string method_title { get; set; }
    public string method_id { get; set; }
    public string total { get; set; }
    public string total_tax { get; set; }
    public List<object> taxes { get; set; }
}

public class RootObject
{
    public int id { get; set; }
    public int parent_id { get; set; }
    public string status { get; set; }
    public string order_key { get; set; }
    public int number { get; set; }
    public string currency { get; set; }
    public string version { get; set; }
    public bool prices_include_tax { get; set; }
    public string date_created { get; set; }
    public string date_modified { get; set; }
    public int customer_id { get; set; }
    public string discount_total { get; set; }
    public string discount_tax { get; set; }
    public string shipping_total { get; set; }
    public string shipping_tax { get; set; }
    public string cart_tax { get; set; }
    public string total { get; set; }
    public string total_tax { get; set; }
    public Billing billing { get; set; }
    public Shipping shipping { get; set; }
    public string payment_method { get; set; }
    public string payment_method_title { get; set; }
    public string transaction_id { get; set; }
    public string customer_ip_address { get; set; }
    public string customer_user_agent { get; set; }
    public string created_via { get; set; }
    public string customer_note { get; set; }
    public string date_completed { get; set; }
    public string date_paid { get; set; }
    public string cart_hash { get; set; }
    public List<LineItem> line_items { get; set; }
    public List<object> tax_lines { get; set; }
    public List<ShippingLine> shipping_lines { get; set; }
    public List<object> fee_lines { get; set; }
    public List<object> coupon_lines { get; set; }
    public List<object> refunds { get; set; }
}

【讨论】:

  • 对于当前响应,没有 tax_lines 、 fee_lines 、 coupon_lines 、refunds 的数据,但最好创建一个包含所有可能数据的 json 并使用 json2csharp.com
  • 谢谢老兄。它有帮助