Android 在RecyclerView中更改drawable将更新所有行

我正试图在我的应用程序中获得“喜欢”按钮的功能，就像Facebook一样。我想要的是，每当用户点击like按钮时，按钮上可绘制的颜色应该从灰色变为蓝色。我正在使用RecyclerView进行提要。由于RecyclerView强制使用viewholder模式，因此所有类似按钮的颜色都会随之更改。 如果能帮我解决这个问题，我将不胜感激

这是适配器的代码

public class FacebookTimelineAdapter : RecyclerView.Adapter
{
    Context mContext { get; set;}
    List<FacebookModel> mData;
    LayoutInflater inflater;
    FacebookViewHolder holder;

    public FacebookTimelineAdapter (Context context,List<FacebookModel> data)
    {
        this.mContext = context;
        this.mData = data;
        this.inflater = LayoutInflater.From (context);
    }

    #region implemented abstract members of Adapter
    public override void OnBindViewHolder (RecyclerView.ViewHolder viewholder, int position)
    {
        holder = viewholder as FacebookViewHolder;
        holder.userName.Text = mData [position].userName;
        holder.timestamp.Text = mData [position].timestamp;

        if(!(mData[position].profilePictureId==0) || !(mData[position].profilePictureId==null))
        holder.profilePicture.SetImageDrawable (mContext.Resources.GetDrawable(mData[position].profilePictureId));

        if (mData [position].feedMessage == "") {
            holder.feedMessage.Visibility = ViewStates.Gone;
        } else {
            holder.feedMessage.Visibility = ViewStates.Visible;
            holder.feedMessage.Text = mData [position].feedMessage;
        }


        if ((mData [position].feedUrl == "") || (mData [position].feedUrl ==null)) {
            holder.feedUrl.Visibility = ViewStates.Gone;
        } else {
            holder.feedUrl.Visibility = ViewStates.Visible;
            holder.feedUrl.Text = mData [position].feedUrl;
        }

        if ((mData [position].feedImage==null) || (mData [position].feedImage==0)) {
            holder.feedImage .Visibility = ViewStates.Gone;
        } else {
            holder.feedImage .Visibility = ViewStates.Visible;
            holder.feedImage.SetImageDrawable(mContext.Resources.GetDrawable(mData[position].feedImage)) ;
        }

        holder.like.Click += delegate {
            Drawable img = mContext.Resources.GetDrawable (Resource.Drawable.fb_comment);
            holder.like.SetCompoundDrawablesWithIntrinsicBounds (img, null, null, null);
        };



    }

    public override RecyclerView.ViewHolder OnCreateViewHolder (ViewGroup parent, int viewType)
    {

        return new FacebookViewHolder (inflater.Inflate (Resource.Layout.timeline_item_facebook,parent,false),this);

    }


    public override int ItemCount {
        get {
            return mData.Count;
        }
    }

    public void LikeClicked(int position)
    {
        Drawable img = mContext.Resources.GetDrawable (Resource.Drawable.fb_comment);
        holder.like.SetCompoundDrawablesWithIntrinsicBounds (img, null, null, null);

    }
    #endregion
}
}

    public class FacebookViewHolder : RecyclerView.ViewHolder
    {
        public TextView userName,timestamp,feedUrl,feedMessage;
        public ImageView profilePicture,feedImage;
        public Button like, comment;


        public FacebookViewHolder(View item, FacebookTimelineAdapter adapter) : base(item)
        {
            userName=item.FindViewById<TextView>(Resource.Id.fb_userName);
            timestamp=item.FindViewById<TextView>(Resource.Id.fb_time);
            feedUrl=item.FindViewById<TextView>(Resource.Id.fb_feed_url);
            feedMessage=item.FindViewById<TextView>(Resource.Id.fb_feed_message);
            profilePicture=item.FindViewById<ImageView>(Resource.Id.fb_profilePicture);
            feedImage=item.FindViewById<ImageView>(Resource.Id.fb_feed_image);
            like=item.FindViewById<Button>(Resource.Id.fb_feed_like);
            comment=item.FindViewById<Button>(Resource.Id.fb_feed_comment);

        }

    }

public class FacebookTimelineAdapter : RecyclerView.Adapter
{
    Context mContext { get; set;}
    List<FacebookModel> mData;
    LayoutInflater inflater;
    FacebookViewHolder holder;

    public FacebookTimelineAdapter (Context context,List<FacebookModel> data)
    {
        this.mContext = context;
        this.mData = data;
        this.inflater = LayoutInflater.From (context);
    }

    #region implemented abstract members of Adapter
    public override void OnBindViewHolder (RecyclerView.ViewHolder viewholder, int position)
    {
        holder = viewholder as FacebookViewHolder;
        holder.userName.Text = mData [position].userName;
        holder.timestamp.Text = mData [position].timestamp;

        if(!(mData[position].profilePictureId==0) || !(mData[position].profilePictureId==null))
        holder.profilePicture.SetImageDrawable (mContext.Resources.GetDrawable(mData[position].profilePictureId));

        if (mData [position].feedMessage == "") {
            holder.feedMessage.Visibility = ViewStates.Gone;
        } else {
            holder.feedMessage.Visibility = ViewStates.Visible;
            holder.feedMessage.Text = mData [position].feedMessage;
        }


        if ((mData [position].feedUrl == "") || (mData [position].feedUrl ==null)) {
            holder.feedUrl.Visibility = ViewStates.Gone;
        } else {
            holder.feedUrl.Visibility = ViewStates.Visible;
            holder.feedUrl.Text = mData [position].feedUrl;
        }

        if ((mData [position].feedImage==null) || (mData [position].feedImage==0)) {
            holder.feedImage .Visibility = ViewStates.Gone;
        } else {
            holder.feedImage .Visibility = ViewStates.Visible;
            holder.feedImage.SetImageDrawable(mContext.Resources.GetDrawable(mData[position].feedImage)) ;
        }

  // Made changes in data structure to see if the post was liked or not. 

    if (mData [position].liked) {
            Drawable img = mContext.Resources.GetDrawable (Resource.Drawable.fb_liked);
            holder.like.SetCompoundDrawablesWithIntrinsicBounds (img, null, null, null);
        } else {
            Drawable img = mContext.Resources.GetDrawable (Resource.Drawable.fb_like);
            holder.like.SetCompoundDrawablesWithIntrinsicBounds (img, null, null, null);
        }

    }

    public override RecyclerView.ViewHolder OnCreateViewHolder (ViewGroup parent, int viewType)
    {

        return new FacebookViewHolder (inflater.Inflate (Resource.Layout.timeline_item_facebook,parent,false),this);

    }


    public override int ItemCount {
        get {
            return mData.Count;
        }
    }

 // On Clicking the like button notifyItemChanged() is called
    public void LikeClicked(int position)
    {
        if (mData [position].liked)
            mData [position].liked = false;
        else
            mData [position].liked = true;

        NotifyItemChanged (position);

    }

 public class FacebookViewHolder : RecyclerView.ViewHolder
    {
        public TextView userName,timestamp,feedUrl,feedMessage;
        public ImageView profilePicture,feedImage;
        public Button like, comment;


        public FacebookViewHolder(View item, FacebookTimelineAdapter adapter) : base(item)
        {
            userName=item.FindViewById<TextView>(Resource.Id.fb_userName);
            timestamp=item.FindViewById<TextView>(Resource.Id.fb_time);
            feedUrl=item.FindViewById<TextView>(Resource.Id.fb_feed_url);
            feedMessage=item.FindViewById<TextView>(Resource.Id.fb_feed_message);
            profilePicture=item.FindViewById<ImageView>(Resource.Id.fb_profilePicture);
            feedImage=item.FindViewById<ImageView>(Resource.Id.fb_feed_image);
            like=item.FindViewById<Button>(Resource.Id.fb_feed_like);
            comment=item.FindViewById<Button>(Resource.Id.fb_feed_comment);

           // Added Click listener in Viewholder
            like.Click += delegate {
                adapter.LikeClicked(LayoutPosition);
            }; 
        }

    }

公共类FacebookTimelineAdapter:RecyclerView.Adapter
{
上下文mContext{get；set；}
列出mData；
充气机；
面书视窗座；
公共FacebookTimelineAdapter（上下文、列表数据）
{
this.mContext=上下文；
this.mData=数据；
this.inflater=layoutiner.From（上下文）；
}
#区域实现的适配器的抽象成员
公共覆盖无效OnBindViewHolder（RecyclerView.ViewHolder ViewHolder，int位置）
{
holder=作为FacebookViewHolder的viewholder；
holder.userName.Text=mData[position].userName；
holder.timestamp.Text=mData[position]。时间戳；
如果（！（mData[position].profilePictureId==0）| |！（mData[position].profilePictureId==null））
holder.profilePicture.SetImageDrawable（mContext.Resources.GetDrawable（mData[position].profilePictureId））；
如果（mData[position].feedMessage==“”）{
holder.feedMessage.Visibility=ViewStates.Gone；
}否则{
holder.feedMessage.Visibility=ViewState.Visible；
holder.feedMessage.Text=mData[position].feedMessage；
}
if（（mData[position].feedUrl==“”）| |（mData[position].feedUrl==null））{
holder.feedUrl.Visibility=ViewStates.Gone；
}否则{
holder.feedUrl.Visibility=ViewStates.Visible；
holder.feedUrl.Text=mData[position].feedUrl；
}
if（（mData[position].feedImage==null）| |（mData[position].feedImage==0））{
holder.feedImage.Visibility=ViewStates.Gone；
}否则{
holder.feedImage.Visibility=ViewStates.Visible；
holder.feedImage.SetImageDrawable（mContext.Resources.GetDrawable（mData[position].feedImage））；
}
holder.like.Click+=委托{
Drawable img=mContext.Resources.GetDrawable（Resource.Drawable.fb_comment）；
holder.like.SetCompoundDrawablesWithIntrinsicBounds（img，null，null，null）；
};
}
public override RecyclerView.ViewHolder OnCreateViewHolder（视图组父级，int-viewType）
{
返回新的FacebookViewHolder（充气器.Inflate（Resource.Layout.timeline\u item\u facebook，parent，false），这是错误的）；
}
公共覆盖int ItemCount{
得到{
返回mData.Count；
}
}
公共无效（内部位置）
{
Drawable img=mContext.Resources.GetDrawable（Resource.Drawable.fb_comment）；
holder.like.SetCompoundDrawablesWithIntrinsicBounds（img，null，null，null）；
}
#端区
}
}

这是ViewHolder的代码

public class FacebookTimelineAdapter : RecyclerView.Adapter
{
    Context mContext { get; set;}
    List<FacebookModel> mData;
    LayoutInflater inflater;
    FacebookViewHolder holder;

    public FacebookTimelineAdapter (Context context,List<FacebookModel> data)
    {
        this.mContext = context;
        this.mData = data;
        this.inflater = LayoutInflater.From (context);
    }

    #region implemented abstract members of Adapter
    public override void OnBindViewHolder (RecyclerView.ViewHolder viewholder, int position)
    {
        holder = viewholder as FacebookViewHolder;
        holder.userName.Text = mData [position].userName;
        holder.timestamp.Text = mData [position].timestamp;

        if(!(mData[position].profilePictureId==0) || !(mData[position].profilePictureId==null))
        holder.profilePicture.SetImageDrawable (mContext.Resources.GetDrawable(mData[position].profilePictureId));

        if (mData [position].feedMessage == "") {
            holder.feedMessage.Visibility = ViewStates.Gone;
        } else {
            holder.feedMessage.Visibility = ViewStates.Visible;
            holder.feedMessage.Text = mData [position].feedMessage;
        }


        if ((mData [position].feedUrl == "") || (mData [position].feedUrl ==null)) {
            holder.feedUrl.Visibility = ViewStates.Gone;
        } else {
            holder.feedUrl.Visibility = ViewStates.Visible;
            holder.feedUrl.Text = mData [position].feedUrl;
        }

        if ((mData [position].feedImage==null) || (mData [position].feedImage==0)) {
            holder.feedImage .Visibility = ViewStates.Gone;
        } else {
            holder.feedImage .Visibility = ViewStates.Visible;
            holder.feedImage.SetImageDrawable(mContext.Resources.GetDrawable(mData[position].feedImage)) ;
        }

        holder.like.Click += delegate {
            Drawable img = mContext.Resources.GetDrawable (Resource.Drawable.fb_comment);
            holder.like.SetCompoundDrawablesWithIntrinsicBounds (img, null, null, null);
        };



    }

    public override RecyclerView.ViewHolder OnCreateViewHolder (ViewGroup parent, int viewType)
    {

        return new FacebookViewHolder (inflater.Inflate (Resource.Layout.timeline_item_facebook,parent,false),this);

    }


    public override int ItemCount {
        get {
            return mData.Count;
        }
    }

    public void LikeClicked(int position)
    {
        Drawable img = mContext.Resources.GetDrawable (Resource.Drawable.fb_comment);
        holder.like.SetCompoundDrawablesWithIntrinsicBounds (img, null, null, null);

    }
    #endregion
}
}

    public class FacebookViewHolder : RecyclerView.ViewHolder
    {
        public TextView userName,timestamp,feedUrl,feedMessage;
        public ImageView profilePicture,feedImage;
        public Button like, comment;


        public FacebookViewHolder(View item, FacebookTimelineAdapter adapter) : base(item)
        {
            userName=item.FindViewById<TextView>(Resource.Id.fb_userName);
            timestamp=item.FindViewById<TextView>(Resource.Id.fb_time);
            feedUrl=item.FindViewById<TextView>(Resource.Id.fb_feed_url);
            feedMessage=item.FindViewById<TextView>(Resource.Id.fb_feed_message);
            profilePicture=item.FindViewById<ImageView>(Resource.Id.fb_profilePicture);
            feedImage=item.FindViewById<ImageView>(Resource.Id.fb_feed_image);
            like=item.FindViewById<Button>(Resource.Id.fb_feed_like);
            comment=item.FindViewById<Button>(Resource.Id.fb_feed_comment);

        }

    }

public class FacebookTimelineAdapter : RecyclerView.Adapter
{
    Context mContext { get; set;}
    List<FacebookModel> mData;
    LayoutInflater inflater;
    FacebookViewHolder holder;

    public FacebookTimelineAdapter (Context context,List<FacebookModel> data)
    {
        this.mContext = context;
        this.mData = data;
        this.inflater = LayoutInflater.From (context);
    }

    #region implemented abstract members of Adapter
    public override void OnBindViewHolder (RecyclerView.ViewHolder viewholder, int position)
    {
        holder = viewholder as FacebookViewHolder;
        holder.userName.Text = mData [position].userName;
        holder.timestamp.Text = mData [position].timestamp;

        if(!(mData[position].profilePictureId==0) || !(mData[position].profilePictureId==null))
        holder.profilePicture.SetImageDrawable (mContext.Resources.GetDrawable(mData[position].profilePictureId));

        if (mData [position].feedMessage == "") {
            holder.feedMessage.Visibility = ViewStates.Gone;
        } else {
            holder.feedMessage.Visibility = ViewStates.Visible;
            holder.feedMessage.Text = mData [position].feedMessage;
        }


        if ((mData [position].feedUrl == "") || (mData [position].feedUrl ==null)) {
            holder.feedUrl.Visibility = ViewStates.Gone;
        } else {
            holder.feedUrl.Visibility = ViewStates.Visible;
            holder.feedUrl.Text = mData [position].feedUrl;
        }

        if ((mData [position].feedImage==null) || (mData [position].feedImage==0)) {
            holder.feedImage .Visibility = ViewStates.Gone;
        } else {
            holder.feedImage .Visibility = ViewStates.Visible;
            holder.feedImage.SetImageDrawable(mContext.Resources.GetDrawable(mData[position].feedImage)) ;
        }

  // Made changes in data structure to see if the post was liked or not. 

    if (mData [position].liked) {
            Drawable img = mContext.Resources.GetDrawable (Resource.Drawable.fb_liked);
            holder.like.SetCompoundDrawablesWithIntrinsicBounds (img, null, null, null);
        } else {
            Drawable img = mContext.Resources.GetDrawable (Resource.Drawable.fb_like);
            holder.like.SetCompoundDrawablesWithIntrinsicBounds (img, null, null, null);
        }

    }

    public override RecyclerView.ViewHolder OnCreateViewHolder (ViewGroup parent, int viewType)
    {

        return new FacebookViewHolder (inflater.Inflate (Resource.Layout.timeline_item_facebook,parent,false),this);

    }


    public override int ItemCount {
        get {
            return mData.Count;
        }
    }

 // On Clicking the like button notifyItemChanged() is called
    public void LikeClicked(int position)
    {
        if (mData [position].liked)
            mData [position].liked = false;
        else
            mData [position].liked = true;

        NotifyItemChanged (position);

    }

 public class FacebookViewHolder : RecyclerView.ViewHolder
    {
        public TextView userName,timestamp,feedUrl,feedMessage;
        public ImageView profilePicture,feedImage;
        public Button like, comment;


        public FacebookViewHolder(View item, FacebookTimelineAdapter adapter) : base(item)
        {
            userName=item.FindViewById<TextView>(Resource.Id.fb_userName);
            timestamp=item.FindViewById<TextView>(Resource.Id.fb_time);
            feedUrl=item.FindViewById<TextView>(Resource.Id.fb_feed_url);
            feedMessage=item.FindViewById<TextView>(Resource.Id.fb_feed_message);
            profilePicture=item.FindViewById<ImageView>(Resource.Id.fb_profilePicture);
            feedImage=item.FindViewById<ImageView>(Resource.Id.fb_feed_image);
            like=item.FindViewById<Button>(Resource.Id.fb_feed_like);
            comment=item.FindViewById<Button>(Resource.Id.fb_feed_comment);

           // Added Click listener in Viewholder
            like.Click += delegate {
                adapter.LikeClicked(LayoutPosition);
            }; 
        }

    }

公共类FacebookViewHolder:RecyclerView.ViewHolder
{
公共文本视图用户名、时间戳、feedUrl、feedMessage；
公共图像查看个人资料图片，feedImage；
公共按钮式，评论式；
公共FacebookViewHolder（视图项目，FacebookTimelineAdapter适配器）：基础（项目）
{
用户名=item.findviewbyd（Resource.Id.fb\u用户名）；
时间戳=item.findviewbyd（Resource.Id.fb\u time）；
feedUrl=item.findviewbyd（Resource.Id.fb\u feed\u url）；
feedMessage=item.FindViewById（Resource.Id.fb\u feed\u message）；
profilePicture=item.findviewbyd（Resource.Id.fb\u profilePicture）；
feedImage=item.findviewbyd（Resource.Id.fb\u feed\u image）；
like=item.findviewbyd（Resource.Id.fb\u feed\u like）；
comment=item.findviewbyd（Resource.Id.fb\u feed\u comment）；
}
}

---

代码在C#中，因为我正在Xamarin中开发android应用程序。

当使用循环视图模式时，您应该将循环视图的状态“重置”到其初始状态，这样，当视图被循环时，您就不会将一个孩子的更改应用到另一个孩子身上。

我在某种程度上解决了Marcos提供的解决方案

这是我的适配器

public class FacebookTimelineAdapter : RecyclerView.Adapter
{
    Context mContext { get; set;}
    List<FacebookModel> mData;
    LayoutInflater inflater;
    FacebookViewHolder holder;

    public FacebookTimelineAdapter (Context context,List<FacebookModel> data)
    {
        this.mContext = context;
        this.mData = data;
        this.inflater = LayoutInflater.From (context);
    }

    #region implemented abstract members of Adapter
    public override void OnBindViewHolder (RecyclerView.ViewHolder viewholder, int position)
    {
        holder = viewholder as FacebookViewHolder;
        holder.userName.Text = mData [position].userName;
        holder.timestamp.Text = mData [position].timestamp;

        if(!(mData[position].profilePictureId==0) || !(mData[position].profilePictureId==null))
        holder.profilePicture.SetImageDrawable (mContext.Resources.GetDrawable(mData[position].profilePictureId));

        if (mData [position].feedMessage == "") {
            holder.feedMessage.Visibility = ViewStates.Gone;
        } else {
            holder.feedMessage.Visibility = ViewStates.Visible;
            holder.feedMessage.Text = mData [position].feedMessage;
        }


        if ((mData [position].feedUrl == "") || (mData [position].feedUrl ==null)) {
            holder.feedUrl.Visibility = ViewStates.Gone;
        } else {
            holder.feedUrl.Visibility = ViewStates.Visible;
            holder.feedUrl.Text = mData [position].feedUrl;
        }

        if ((mData [position].feedImage==null) || (mData [position].feedImage==0)) {
            holder.feedImage .Visibility = ViewStates.Gone;
        } else {
            holder.feedImage .Visibility = ViewStates.Visible;
            holder.feedImage.SetImageDrawable(mContext.Resources.GetDrawable(mData[position].feedImage)) ;
        }

        holder.like.Click += delegate {
            Drawable img = mContext.Resources.GetDrawable (Resource.Drawable.fb_comment);
            holder.like.SetCompoundDrawablesWithIntrinsicBounds (img, null, null, null);
        };



    }

    public override RecyclerView.ViewHolder OnCreateViewHolder (ViewGroup parent, int viewType)
    {

        return new FacebookViewHolder (inflater.Inflate (Resource.Layout.timeline_item_facebook,parent,false),this);

    }


    public override int ItemCount {
        get {
            return mData.Count;
        }
    }

    public void LikeClicked(int position)
    {
        Drawable img = mContext.Resources.GetDrawable (Resource.Drawable.fb_comment);
        holder.like.SetCompoundDrawablesWithIntrinsicBounds (img, null, null, null);

    }
    #endregion
}
}

    public class FacebookViewHolder : RecyclerView.ViewHolder
    {
        public TextView userName,timestamp,feedUrl,feedMessage;
        public ImageView profilePicture,feedImage;
        public Button like, comment;


        public FacebookViewHolder(View item, FacebookTimelineAdapter adapter) : base(item)
        {
            userName=item.FindViewById<TextView>(Resource.Id.fb_userName);
            timestamp=item.FindViewById<TextView>(Resource.Id.fb_time);
            feedUrl=item.FindViewById<TextView>(Resource.Id.fb_feed_url);
            feedMessage=item.FindViewById<TextView>(Resource.Id.fb_feed_message);
            profilePicture=item.FindViewById<ImageView>(Resource.Id.fb_profilePicture);
            feedImage=item.FindViewById<ImageView>(Resource.Id.fb_feed_image);
            like=item.FindViewById<Button>(Resource.Id.fb_feed_like);
            comment=item.FindViewById<Button>(Resource.Id.fb_feed_comment);

        }

    }

public class FacebookTimelineAdapter : RecyclerView.Adapter
{
    Context mContext { get; set;}
    List<FacebookModel> mData;
    LayoutInflater inflater;
    FacebookViewHolder holder;

    public FacebookTimelineAdapter (Context context,List<FacebookModel> data)
    {
        this.mContext = context;
        this.mData = data;
        this.inflater = LayoutInflater.From (context);
    }

    #region implemented abstract members of Adapter
    public override void OnBindViewHolder (RecyclerView.ViewHolder viewholder, int position)
    {
        holder = viewholder as FacebookViewHolder;
        holder.userName.Text = mData [position].userName;
        holder.timestamp.Text = mData [position].timestamp;

        if(!(mData[position].profilePictureId==0) || !(mData[position].profilePictureId==null))
        holder.profilePicture.SetImageDrawable (mContext.Resources.GetDrawable(mData[position].profilePictureId));

        if (mData [position].feedMessage == "") {
            holder.feedMessage.Visibility = ViewStates.Gone;
        } else {
            holder.feedMessage.Visibility = ViewStates.Visible;
            holder.feedMessage.Text = mData [position].feedMessage;
        }


        if ((mData [position].feedUrl == "") || (mData [position].feedUrl ==null)) {
            holder.feedUrl.Visibility = ViewStates.Gone;
        } else {
            holder.feedUrl.Visibility = ViewStates.Visible;
            holder.feedUrl.Text = mData [position].feedUrl;
        }

        if ((mData [position].feedImage==null) || (mData [position].feedImage==0)) {
            holder.feedImage .Visibility = ViewStates.Gone;
        } else {
            holder.feedImage .Visibility = ViewStates.Visible;
            holder.feedImage.SetImageDrawable(mContext.Resources.GetDrawable(mData[position].feedImage)) ;
        }

  // Made changes in data structure to see if the post was liked or not. 

    if (mData [position].liked) {
            Drawable img = mContext.Resources.GetDrawable (Resource.Drawable.fb_liked);
            holder.like.SetCompoundDrawablesWithIntrinsicBounds (img, null, null, null);
        } else {
            Drawable img = mContext.Resources.GetDrawable (Resource.Drawable.fb_like);
            holder.like.SetCompoundDrawablesWithIntrinsicBounds (img, null, null, null);
        }

    }

    public override RecyclerView.ViewHolder OnCreateViewHolder (ViewGroup parent, int viewType)
    {

        return new FacebookViewHolder (inflater.Inflate (Resource.Layout.timeline_item_facebook,parent,false),this);

    }


    public override int ItemCount {
        get {
            return mData.Count;
        }
    }

 // On Clicking the like button notifyItemChanged() is called
    public void LikeClicked(int position)
    {
        if (mData [position].liked)
            mData [position].liked = false;
        else
            mData [position].liked = true;

        NotifyItemChanged (position);

    }

 public class FacebookViewHolder : RecyclerView.ViewHolder
    {
        public TextView userName,timestamp,feedUrl,feedMessage;
        public ImageView profilePicture,feedImage;
        public Button like, comment;


        public FacebookViewHolder(View item, FacebookTimelineAdapter adapter) : base(item)
        {
            userName=item.FindViewById<TextView>(Resource.Id.fb_userName);
            timestamp=item.FindViewById<TextView>(Resource.Id.fb_time);
            feedUrl=item.FindViewById<TextView>(Resource.Id.fb_feed_url);
            feedMessage=item.FindViewById<TextView>(Resource.Id.fb_feed_message);
            profilePicture=item.FindViewById<ImageView>(Resource.Id.fb_profilePicture);
            feedImage=item.FindViewById<ImageView>(Resource.Id.fb_feed_image);
            like=item.FindViewById<Button>(Resource.Id.fb_feed_like);
            comment=item.FindViewById<Button>(Resource.Id.fb_feed_comment);

           // Added Click listener in Viewholder
            like.Click += delegate {
                adapter.LikeClicked(LayoutPosition);
            }; 
        }

    }

公共类FacebookTimelineAdapter:RecyclerView.Adapter
{
上下文mContext{get；set；}
列出mData；
充气机；
面书视窗座；
公共FacebookTimelineAdapter（上下文、列表数据）
{
this.mContext=上下文；
this.mData=数据；
this.inflater=layoutiner.From（上下文）；
}
#区域实现的适配器的抽象成员
公共覆盖无效OnBindViewHolder（RecyclerView.ViewHolder ViewHolder，int位置）
{
holder=作为FacebookViewHolder的viewholder；
holder.userName.Text=mData[position].userName；
holder.timestamp.Text=mData[position]。时间戳；
如果（！（mData[position].profilePictureId==0）| |！（mData[position].profilePictureId==null））
holder.profilePicture.SetImageDrawable（mContext.Resources.GetDrawable（mData[position].profilePictureId））；
如果（mData[position].feedMessage==“”）{
holder.feedMessage.Visibility=ViewStates.Gone；
}否则{
holder.feedMessage.Visibility=ViewState.Visible；
holder.feedMessage.Text=mData[position].feedMessage；
}
if（（mData[position].feedUrl==“”）| |（mData[position].feedUrl==null））{
holder.feedUrl.Visibility=ViewStates.Gone；
}否则{
holder.feedUrl.Visibility=ViewStates.Visible；
holder.feedUrl.Text=mData[position].feedUrl；
}
if（（mData[position].feedImage==null）