Android Expandable RecyclerView不同卡高

Question

我有一个包含卡片列表的RecyclerView,每个卡片都扩展为子卡片.
每张卡片都有不同的文字.我希望当用户点击子卡时,它会展开以显示内部文本.扩展高度取决于卡包含的文本量.

我尝试使用以下方法测量目标高度:

view.Measure(ViewGroup.LayoutParams.WrapContent, ViewGroup.LayoutParams.WrapContent);

然后将卡扩展到Measured Height(参见此处).但是,它为所有卡提供相同的测量高度.

这是我的代码,它基于此(更具体地说是Xamarin版本):

这是主适配器,它创建并绑定父卡和子卡:

public class HalachaExpandableAdapter : ExpandableRecyclerAdapter<HalachaParentViewHolder, HalachaChildViewHolder>, View.IOnClickListener
{
    LayoutInflater _inflater;
    bool expand;
    int targetHeight;
    bool wave = false;

    public HalachaExpandableAdapter(Context context, List<IParentObject> itemList) : base(context, itemList)
    {
        _inflater = LayoutInflater.From(context);
    }

    public override void OnBindChildViewHolder(HalachaChildViewHolder childViewHolder, int position, object childObject)
    {
        var halachaChild = (HalachaChild)childObject;
        childViewHolder.halachaChildTitle.Text = halachaChild.Title.ToString();

        targetHeight = childViewHolder.halachaChildCard.Height;
        childViewHolder.halachaChildCard.LayoutParameters.Height = 100;
        childViewHolder.halachaChildCard.SetOnClickListener(this);
        expand = childViewHolder.expand;

    }

    public override void OnBindParentViewHolder(HalachaParentViewHolder parentViewHolder, int position, object parentObject)
    {
        var halacha = (HalachaItem)parentObject;
        parentViewHolder._halachaTitleTextView.Text = halacha.Title();
        parentViewHolder._halachaContentTextView.Text = halacha.Content;
        if (halacha.ChildObjectList.Count == 1)
            wave = true;
    }

    public void OnClick(View v)
    {
        if (v.Height == 100)
        {
            AnimationCollapse anim = new AnimationCollapse(v, targetHeight, 100);
            anim.Duration = 300;
                            v.StartAnimation(anim);

            expand = false;
        }
        else
        {
            AnimationCollapse anim = new AnimationCollapse(v, 100, v.Height);
            anim.Duration = 300;
                            v.StartAnimation(anim);

            expand = true;
        }
    }

    public override HalachaChildViewHolder OnCreateChildViewHolder(ViewGroup childViewGroup)
    {
        var view = _inflater.Inflate(Resource.Layout.halachotListItem, childViewGroup, false);
        return new HalachaChildViewHolder(view);
    }

    public override HalachaParentViewHolder OnCreateParentViewHolder(ViewGroup parentViewGroup)
    {
        var view = _inflater.Inflate(Resource.Layout.halachotListHeader, parentViewGroup, false);
        wave = false;
        return new HalachaParentViewHolder(view);
    }
}

我认为这是需要完成代码的地方,但是如果你需要其他类的其他代码,我很乐意发布它们.您还可以查看上面的链接,以了解其工作原理.

希望可以有人帮帮我.
谢谢!

Answer 1

我终于设法解决了这个问题.
我需要改变我测量视图的wrap_content高度的方式:

v.Measure(MeasureSpec.MakeMeasureSpec(v.Width, MeasureSpecMode.Exactly), MeasureSpec.MakeMeasureSpec(ViewGroup.LayoutParams.WrapContent, MeasureSpecMode.AtMost));

其余的都是一样的.
感谢这篇文章.