RecyclerView 中 CardView 和 OnClickListener 的问题 [英] Issue with CardView and OnClickListener in RecyclerView

问题描述

我使用 CardView 布局作为 RecyclerView 的 Row.但是，我在将 OnClickListener 附加到布局时遇到了问题.我正在使用以下布局

I am using CardView layout as Row for RecyclerView. However I am facing issue in attaching OnClickListener to the layout. I am using following layout

<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:id="@+id/card_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_margin="@dimen/unit_5"
    android:clickable="true"
    android:longClickable="true"
    card_view:cardCornerRadius="@dimen/unit_5">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="@dimen/spinnerWidth"
        android:background="@drawable/row_item_background"
        android:clickable="true"
        android:orientation="vertical"
        android:padding="@dimen/dialog_left_padding">

<!-- Other items -->

        </LinearLayout>

        </android.support.v7.widget.CardView>

以下是我的适配器和 ViewHolder

Following are my adapter and ViewHolder

 private class SampleAdapter extends RecyclerView.Adapter<SampleViewHolder> {
        ArrayList<Item> arrayList;
        private LayoutInflater inflater;

        public SampleAdapter(Context context) {
            inflater = LayoutInflater.from(context);
            this.arrayList = new ArrayList<>();
            arrayList.addAll(items);
        }

        @Override
        public SampleViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            View view = inflater.inflate(R.layout.layout1, parent, false);
            SampleViewHolder holder = new SampleViewHolder(view);
            holder.setClickHandler(handler);
            return holder;
        }

        @Override
        public void onBindViewHolder(SampleViewHolder holder, int position) {

        }

        @Override
        public int getItemCount() {
            return arrayList.size();
        }

    }

  static class SampleViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener, View.OnLongClickListener {
        TextView name;
        IClickHandler clickHandler;
        public IClickHandler getClickHandler() {
            return clickHandler;
        }

        public void setClickHandler(IClickHandler clickHandler) {
            this.clickHandler = clickHandler;
        }

        public SampleViewHolder(View itemView) {
            super(itemView);
            name = (TextView) itemView
                    .findViewById(R.id.name);
            itemView.setOnClickListener(this);
            itemView.setOnLongClickListener(this);
        }


        @Override
        public void onClick(View view) {
            if (getClickHandler() != null) {
                getClickHandler().onItemClicked(view, getLayoutPosition());
            }
        }

        @Override
        public boolean onLongClick(View view) {
            if (getClickHandler() != null) {
                getClickHandler().onItemLongClicked(view, getLayoutPosition());
            }
            return true;
        }
    }

但是这个 onClick 永远不会被触发.

But this onClick is never fired.

但是，如果我用 LinearLayout 替换 CardView，则一切正常.我不确定这里有什么问题.有人可以帮我吗?

However, if I replace CardView with LinearLayout every thing works fine. I am not sure what is the issue here. Can somebody help me in this?

谢谢.

推荐答案

实际上实现 onClick 非常简单，我不确定自定义点击处理程序 (IClickHandler) 的实现.

Actually implementing onClick is very straightforward and I am not sure of the implementation of a custom click handler (IClickHandler).

首先，视图持有者应该是:

First of all View holder should be just:

static class SampleViewHolder extends RecyclerView.ViewHolder {
  TextView name;

  public SampleViewHolder(View itemView) {
    super(itemView);
    name = (TextView) itemView.findViewById(R.id.name);
  }
}

然后在 SampleAdapter

And then in SampleAdapter

@Override
public SampleViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
  View view = inflater.inflate(R.layout.layout1, parent, false);
  SampleViewHolder holder = new SampleViewHolder(view);
  return holder;
}

@Override
public void onBindViewHolder(SampleViewHolder holder, int position) {
    final Item item = arrayList.get(position);

    holder.name.setOnClickListener(new View.OnClickListener(){

       @Override
       public void onClick(View view) {
         //notice I implemented onClickListener here
         // so I can associate this click with final Item item           
       }

    });

}

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