错误 CS0115“...OnBindViewHolder(Object, int)”：找不到合适的方法来覆盖

Error CS0115 '...OnBindViewHolder(Object, int)': no suitable method found to override

我正在绑定这个库：

https://github.com/mancj/MaterialSearchBar

通常情况下，它是有效的，但是，当我尝试添加对 RecyclerView 的支持时遇到问题，我添加了以下库：

我收到以下错误：

我试着按照这个建议创建一些部分 类:

xamarin.android binding thorw 'does not implement inherited abstract member 'RecyclerView.Adapter.OnCreateViewHolder(ViewGroup, int)'

但它没有用，我开始得到重复的，就个人而言，我认为主要问题在这里：

Severity Code Description Project File Line Suppression State Error CS0115 'SuggestionsAdapter.OnBindViewHolder(Object, int)': no suitable method found to override Xamarin-MaterialSearchBar C:\Users\feder\source\repos\Xamarin-MaterialSearchBar\Xamarin-MaterialSearchBar\obj\Release\generated\src\Com.Mancj.Materialsearchbar.Adapter.SuggestionsAdapter.cs 666 Active

这是我的VS 2019的配置：

项目 Gradle 中唯一的依赖项如下：

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    testImplementation 'junit:junit:4.12'
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support:recyclerview-v7:28.0.0'
    implementation 'com.android.support:cardview-v7:28.0.0'
}

如果要编译好的aar file and the project进行测试

如你所见，我都有。任何想法，我错过了什么？谢谢。

试试这个，

1.add Xamarin-MaterialSearchBar - Transforms - Metadata.xml

<remove-node path="/api/package[@name='com.mancj.materialsearchbar.adapter']/class[@name='SuggestionsAdapter']/method[@name='onBindViewHolder']" />

2.in 你的 Xamarin-MaterialSearchBar - Additions，创建一个 partial class DefaultSuggestionsAdapter

namespace Com.Mancj.Materialsearchbar.Adapter
{
  partial class DefaultSuggestionsAdapter
   {
     public override void OnBindViewHolder(RecyclerView.ViewHolder holder, int position)
      {
        throw new NotImplementedException();
      }

     public override void OnBindSuggestionHolder(Object p0, Object p1, int p2)
      {
        throw new NotImplementedException();
      }
   }
}

您还可以参考：

如何解决这个问题？从技术上讲，它不是那么简单，最好的解决方案有 6 个步骤：

  1. 添加以下 NuGet 包：

    这些是在 build.gradle.

    2. 中找到的最低要求

  2. 使用这段代码从 Metadata.xml 中删除未来库中的 class SuggestionsAdapter（启发由 ).

    <remove-node path="/api/package[@name='com.mancj.materialsearchbar.adapter']/class[@name='SuggestionsAdapter']" />

    为什么？因为这段代码没有通过binder正确移植到C#；也许，原因是 V 代表 RecyclerView.ViewHolder 并且它对于活页夹来说太通用了。您可以在此处查看原始代码：SuggestionsAdapter.java

    此外，您可能会问我为什么选择迁移 SuggestionsAdapter 而不是 DefaultSuggestionsAdapter。有两个原因：

    • SuggestionsAdapter 是 base class.
    • DefaultSuggestionsAdapter 调用了您无法从 C# 访问的 XML 代码，您可以在第 34、55 和 56 行中看到它们。

  3. 建立你的图书馆。

  4. 在您的 Additions 中创建一个名为 Adapter 的新文件夹，您需要在其中创建一个名为 SuggestionsAdapter[=69] 的 class =].

  5. 将代码从 Java 迁移到 C#。

    namespace Com.Mancj.Materialsearchbar.Adapter
{
    public abstract class SuggestionsAdapter<S, V> : RecyclerView.Adapter, IFilterable
    {
        private readonly LayoutInflater Inflater;
        protected List<S> Suggestions = new List<S>();
        protected List<S> Suggestions_clone = new List<S>();
        protected int MaxSuggestionsCount = 5;

        public void AddSuggestion(S r)
        {
            if (MaxSuggestionsCount <= 0)
            {
                return;
            }

            if (r == null)
            {
                return;
            }
            if (!Suggestions.Contains(r))
            {
                if (Suggestions.Count >= MaxSuggestionsCount)
                {
                    Suggestions.RemoveAt(MaxSuggestionsCount - 1);
                }
                Suggestions.Insert(0, r);
            }
            else
            {
                Suggestions.Remove(r);
                Suggestions.Insert(0, r);
            }
            Suggestions_clone = Suggestions;
            NotifyDataSetChanged();
        }

        public void SetSuggestions(List<S> suggestions)
        {
            Suggestions = suggestions;
            Suggestions_clone = suggestions;
            NotifyDataSetChanged();
        }

        public void ClearSuggestions()
        {
            Suggestions.Clear();
            Suggestions_clone = Suggestions;
            NotifyDataSetChanged();
        }

        public void DeleteSuggestion(int position, S r)
        {
            if (r == null)
            {
                return;
            }
            //delete item with animation
            if (Suggestions.Contains(r))
            {
                NotifyItemRemoved(position);
                Suggestions.Remove(r);
                Suggestions_clone = Suggestions;
            }
        }

        public List<S> GetSuggestions()
        {
            return Suggestions;
        }

        public int GetMaxSuggestionsCount()
        {
            return MaxSuggestionsCount;
        }

        public void SetMaxSuggestionsCount(int maxSuggestionsCount)
        {
            MaxSuggestionsCount = maxSuggestionsCount;
        }

        protected LayoutInflater GetLayoutInflater()
        {
            return Inflater;
        }

        public SuggestionsAdapter(LayoutInflater inflater)
        {
            Inflater = inflater;
        }

        public abstract int GetSingleViewHeight();

        public int GetListHeight()
        {
            return ItemCount * GetSingleViewHeight();
        }

        public abstract void OnBindSuggestionHolder(S suggestion, RecyclerView.ViewHolder holder, int position);

        public override int ItemCount => Suggestions.Count;

        public Filter Filter => null;

        public override void OnBindViewHolder(RecyclerView.ViewHolder holder, int position)
        {
            OnBindSuggestionHolder(Suggestions[position], holder, position);
        }

        public interface IOnItemViewClickListener
        {
            void OnItemClickListener(int position, View v);
            void OnItemDeleteListener(int position, View v);
        }
    }
}

  6. 再次构建您的项目，仅此而已！您的图书馆正在全面运作。

如果要检查result。