关于java：为什么RecyclerView没有onItemClickListener（）？


Why doesn't RecyclerView have onItemClickListener()?

我正在探索RecyclerView，我惊讶地发现RecyclerView没有onItemClickListener()。因为RecyclerView扩展了

android.view.ViewGroup

和ListView延伸

android.widget.AbsListView

. 但是，我通过在我的RecyclerView.Adapter中写onClick来解决我的问题：

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public static class ViewHolder extends RecyclerView.ViewHolder implements OnClickListener {

    public TextView txtViewTitle;
    public ImageView imgViewIcon;

    public ViewHolder(View itemLayoutView) {
        super(itemLayoutView);
        txtViewTitle = (TextView) itemLayoutView.findViewById(R.id.item_title);
        imgViewIcon = (ImageView) itemLayoutView.findViewById(R.id.item_icon);
    }

    @Override
    public void onClick(View v) {

    }
}

但我还是想知道为什么谷歌删除了onItemClickListener()？

是否存在性能问题或其他问题？

相关讨论

tl；dr 2016使用rxjava和一个publishesubject来公开可观察到的点击。

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public class ReactiveAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
    String[] mDataset = {"Data","In","Adapter" };

    private final PublishSubject<String> onClickSubject = PublishSubject.create();

    @Override
    public void onBindViewHolder(final ViewHolder holder, int position) {
        final String element = mDataset[position];

        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
               onClickSubject.onNext(element);
            }
        });
    }

    public Observable<String> getPositionClicks(){
        return onClickSubject.asObservable();
    }
}

原始职位：

自引入ListView以来，onItemClickListener一直存在问题。当您拥有任何内部元素的点击监听器时，回调将不会被触发，但它没有得到通知或良好的文档记录(如果有的话)，所以有很多困惑，因此有很多问题。

考虑到RecyclerView更进一步，它没有行/列的概念，而是任意分配的子元素数量，因此它们将onclick委托给了每个子元素，或者委托给程序员实现。

不要把RecyclerView看作是ListView1:1替换，而是把它当作复杂用例中更灵活的组件。正如你所说，你的解决方案正是谷歌对你的期望。现在您有了一个适配器，它可以将onclick委托给传递给构造函数的接口，这对于ListView和RecyclerView都是正确的模式。

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public static class ViewHolder extends RecyclerView.ViewHolder implements OnClickListener {

    public TextView txtViewTitle;
    public ImageView imgViewIcon;
    public IMyViewHolderClicks mListener;

    public ViewHolder(View itemLayoutView, IMyViewHolderClicks listener) {
        super(itemLayoutView);
        mListener = listener;
        txtViewTitle = (TextView) itemLayoutView.findViewById(R.id.item_title);
        imgViewIcon = (ImageView) itemLayoutView.findViewById(R.id.item_icon);
        imgViewIcon.setOnClickListener(this);
        itemLayoutView.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        if (v instanceof ImageView){
           mListener.onTomato((ImageView)v);
        } else {
           mListener.onPotato(v);
        }
    }

    public static interface IMyViewHolderClicks {
        public void onPotato(View caller);
        public void onTomato(ImageView callerImage);
    }

}

然后在适配器上

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public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {

   String[] mDataset = {"Data" };

   @Override
   public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
       View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.my_layout, parent, false);

       MyAdapter.ViewHolder vh = new ViewHolder(v, new MyAdapter.ViewHolder.IMyViewHolderClicks() {
           public void onPotato(View caller) { Log.d("VEGETABLES","Poh-tah-tos"); };
           public void onTomato(ImageView callerImage) {&nbsp;Log.d("VEGETABLES","To-m8-tohs"); }
        });
        return vh;
    }

    // Replace the contents of a view (invoked by the layout manager)
    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        // Get element from your dataset at this position
        // Replace the contents of the view with that element
        // Clear the ones that won't be used
        holder.txtViewTitle.setText(mDataset[position]);
    }

    // Return the size of your dataset (invoked by the layout manager)
    @Override
    public int getItemCount() {
        return mDataset.length;
    }
  ...

现在看看最后一段代码：onCreateViewHolder(ViewGroup parent, int viewType)，签名已经暗示了不同的视图类型。对于其中的每一个，您也需要一个不同的取景器，随后每个取景器都可以有一组不同的单击。或者，您只需创建一个通用的视图持有者，它可以获取任何视图和一个onClickListener并相应地应用。或者将一个级别委托给Orchestrator，使多个片段/活动具有相同的列表，具有不同的单击行为。同样，所有的灵活性都在你这一边。

它是一个真正需要的组件，非常接近我们对ListView的内部实现和改进。谷歌最终承认这一点是好事。

相关讨论

另一种解决方案是由安卓GDE的Hugo Visser提出的。他给你安排了一个免费的课程，让你直接输入代码并使用它。

用途：

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ItemClickSupport.addTo(mRecyclerView)
        .setOnItemClickListener(new ItemClickSupport.OnItemClickListener() {
    @Override
    public void onItemClicked(RecyclerView recyclerView, int position, View v) {
        // do it
    }
});

(也支持长项目点击)

实施(我添加的意见)：

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public class ItemClickSupport {
    private final RecyclerView mRecyclerView;
    private OnItemClickListener mOnItemClickListener;
    private OnItemLongClickListener mOnItemLongClickListener;
    private View.OnClickListener mOnClickListener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (mOnItemClickListener != null) {
                // ask the RecyclerView for the viewHolder of this view.
                // then use it to get the position for the adapter
                RecyclerView.ViewHolder holder = mRecyclerView.getChildViewHolder(v);
                mOnItemClickListener.onItemClicked(mRecyclerView, holder.getAdapterPosition(), v);
            }
        }
    };
    private View.OnLongClickListener mOnLongClickListener = new View.OnLongClickListener() {
        @Override
        public boolean onLongClick(View v) {
            if (mOnItemLongClickListener != null) {
                RecyclerView.ViewHolder holder = mRecyclerView.getChildViewHolder(v);
                return mOnItemLongClickListener.onItemLongClicked(mRecyclerView, holder.getAdapterPosition(), v);
            }
            return false;
        }
    };
    private RecyclerView.OnChildAttachStateChangeListener mAttachListener
            = new RecyclerView.OnChildAttachStateChangeListener() {
        @Override
        public void onChildViewAttachedToWindow(View view) {
            // every time a new child view is attached add click listeners to it
            if (mOnItemClickListener != null) {
                view.setOnClickListener(mOnClickListener);
            }
            if (mOnItemLongClickListener != null) {
                view.setOnLongClickListener(mOnLongClickListener);
            }
        }

        @Override
        public void onChildViewDetachedFromWindow(View view) {

        }
    };

    private ItemClickSupport(RecyclerView recyclerView) {
        mRecyclerView = recyclerView;
        // the ID must be declared in XML, used to avoid
        // replacing the ItemClickSupport without removing
        // the old one from the RecyclerView
        mRecyclerView.setTag(R.id.item_click_support, this);
        mRecyclerView.addOnChildAttachStateChangeListener(mAttachListener);
    }

    public static ItemClickSupport addTo(RecyclerView view) {
        // if there's already an ItemClickSupport attached
        // to this RecyclerView do not replace it, use it
        ItemClickSupport support = (ItemClickSupport) view.getTag(R.id.item_click_support);
        if (support == null) {
            support = new ItemClickSupport(view);
        }
        return support;
    }

    public static ItemClickSupport removeFrom(RecyclerView view) {
        ItemClickSupport support = (ItemClickSupport) view.getTag(R.id.item_click_support);
        if (support != null) {
            support.detach(view);
        }
        return support;
    }

    public ItemClickSupport setOnItemClickListener(OnItemClickListener listener) {
        mOnItemClickListener = listener;
        return this;
    }

    public ItemClickSupport setOnItemLongClickListener(OnItemLongClickListener listener) {
        mOnItemLongClickListener = listener;
        return this;
    }

    private void detach(RecyclerView view) {
        view.removeOnChildAttachStateChangeListener(mAttachListener);
        view.setTag(R.id.item_click_support, null);
    }

    public interface OnItemClickListener {

        void onItemClicked(RecyclerView recyclerView, int position, View v);
    }

    public interface OnItemLongClickListener {

        boolean onItemLongClicked(RecyclerView recyclerView, int position, View v);
    }
}

还要创建一个文件values/ids.xml并将其放入其中：

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<?xml version="1.0" encoding="utf-8"?>
<resources>
    <item name="item_click_support" type="id" />
</resources>

这个类通过将RecyclerView.OnChildAttachStateChangeListener附加到RecyclerView来工作。每次孩子与RecyclerView连接或分离时，都会通知此侦听器。代码使用它将tap/long-click侦听器附加到视图中。听者向RecyclerView询问包含该位置的RecyclerView.ViewHolder。

如果您需要更多的代码，您还可以修改代码，将持有者本身还给您。

请记住，在您的适配器中通过在列表的每个视图上设置一个单击监听器来处理它是完全可以的，就像其他建议的答案一样。这并不是最有效的方法(每次重用视图时都创建一个新的监听器)，但它是有效的，在大多数情况下，它不是问题。

关于为什么RecyclerView没有onItemClickListener。

与旧的ListView相比，RecyclerView是一个工具箱，它的内置功能更少，灵活性更高。onItemClickListener不是从ListView中删除的唯一功能。但它有很多听众和方法来满足你的喜好，在右手中它更强大；)。

在我看来，RecyclerView中删除的最复杂的功能是快速滚动。大多数其他特性可以很容易地重新实现。

我喜欢这种方式，而且我正在使用它

里面

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public Adapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType)

放

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View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.view_image_and_text, parent, false);
v.setOnClickListener(new MyOnClickListener());

在任何你想要的地方创建这个类

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class MyOnClickListener implements View.OnClickListener {
    @Override
    public void onClick(View v) {
       int itemPosition = recyclerView.indexOfChild(v);
       Log.e("Clicked and Position is",String.valueOf(itemPosition));
    }
}

我以前读过，有更好的方法，但我喜欢这种方法简单而不复杂。

相关讨论

带onItemClickListener的android recyclerview，为什么我们不能这样做，只是像ListView一样工作。

资料来源：链接

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public class RecyclerItemClickListener implements RecyclerView.OnItemTouchListener {

private OnItemClickListener mListener;
public interface OnItemClickListener {
    public void onItemClick(View view, int position);
}
GestureDetector mGestureDetector;
public RecyclerItemClickListener(Context context, OnItemClickListener listener) {
    mListener = listener;
    mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
        @Override
        public boolean onSingleTapUp(MotionEvent e) {
            return true;
        }
    });
}
@Override
public boolean onInterceptTouchEvent(RecyclerView view, MotionEvent e) {
    View childView = view.findChildViewUnder(e.getX(), e.getY());
    if (childView != null && mListener != null && mGestureDetector.onTouchEvent(e)) {
        mListener.onItemClick(childView, view.getChildAdapterPosition(childView));
    }
    return false;
}

@Override
public void onTouchEvent(RecyclerView view, MotionEvent motionEvent) {
}

@Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {

  }
}

并将其设置为RecyclerView:

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    recyclerView = (RecyclerView)rootView. findViewById(R.id.recyclerView);
    RecyclerView.LayoutManager mLayoutManager = new            LinearLayoutManager(getActivity());
    recyclerView.setLayoutManager(mLayoutManager);
    recyclerView.addOnItemTouchListener(
            new RecyclerItemClickListener(getActivity(), new   RecyclerItemClickListener.OnItemClickListener() {
                @Override
                public void onItemClick(View view, int position) {
                    // TODO Handle item click
                    Log.e("@@@@@",""+position);
                }
            })
    );
相关讨论

感谢@marmor，我更新了我的答案。

我认为在viewholder类构造函数中处理onclick()并通过onitemlicklistener接口将其传递给父类是一个很好的解决方案。

MyAdvult.java

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public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder>{

private LayoutInflater layoutInflater;
private List<MyObject> items;
private AdapterView.OnItemClickListener onItemClickListener;

public MyAdapter(Context context, AdapterView.OnItemClickListener onItemClickListener, List<MyObject> items) {
    layoutInflater = LayoutInflater.from(context);
    this.items = items;
    this.onItemClickListener = onItemClickListener;
}

@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view = layoutInflater.inflate(R.layout.my_row_layout, parent, false);
    return new ViewHolder(view);
}

@Override
public void onBindViewHolder(ViewHolder holder, int position) {
    MyObject item = items.get(position);
}

public MyObject getItem(int position) {
    return items.get(position);
}


class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
    private TextView title;
    private ImageView avatar;

    public ViewHolder(View itemView) {
        super(itemView);
        title = itemView.findViewById(R.id.title);
        avatar = itemView.findViewById(R.id.avatar);

        title.setOnClickListener(this);
        avatar.setOnClickListener(this);
        itemView.setOnClickListener(this);
    }

    @Override
    public void onClick(View view) {
        //passing the clicked position to the parent class
        onItemClickListener.onItemClick(null, view, getAdapterPosition(), view.getId());
    }
}
}

在其他类中使用适配器：

爪哇

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public class MyFragment extends Fragment implements AdapterView.OnItemClickListener {

private RecyclerView recycleview;
private MyAdapter adapter;

    .
    .
    .

private void init(Context context) {
    //passing this fragment as OnItemClickListener to the adapter
    adapter = new MyAdapter(context, this, items);
    recycleview.setAdapter(adapter);
}

@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    //you can get the clicked item from the adapter using its position
    MyObject item = adapter.getItem(position);

    //you can also find out which view was clicked
    switch (view.getId()) {
        case R.id.title:
            //title view was clicked
            break;
        case R.id.avatar:
            //avatar view was clicked
            break;
        default:
            //the whole row was clicked
    }
}

}
相关讨论

伙计们在你的主要活动中使用这个代码。非常有效的方法

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RecyclerView recyclerView = (RecyclerView) findViewById(R.id.users_list);            
UsersAdapter adapter = new UsersAdapter(users, this);
recyclerView.setAdapter(adapter);
adapter.setOnCardClickListner(this);

这是适配器类。

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public class UsersAdapter extends RecyclerView.Adapter<UsersAdapter.UserViewHolder> {
        private ArrayList<User> mDataSet;
        OnCardClickListner onCardClickListner;


        public UsersAdapter(ArrayList<User> mDataSet) {
            this.mDataSet = mDataSet;
        }

        @Override
        public UserViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.user_row_layout, parent, false);
            UserViewHolder userViewHolder = new UserViewHolder(v);
            return userViewHolder;
        }

        @Override
        public void onBindViewHolder(UserViewHolder holder, final int position) {
            holder.name_entry.setText(mDataSet.get(position).getUser_name());
            holder.cardView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    onCardClickListner.OnCardClicked(v, position);
                }
            });
        }

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

        @Override
        public void onAttachedToRecyclerView(RecyclerView recyclerView) {
            super.onAttachedToRecyclerView(recyclerView);
        }


        public static class UserViewHolder extends RecyclerView.ViewHolder {
            CardView cardView;
            TextView name_entry;

            public UserViewHolder(View itemView) {
                super(itemView);
                cardView = (CardView) itemView.findViewById(R.id.user_layout);
                name_entry = (TextView) itemView.findViewById(R.id.name_entry);
             }
        }

        public interface OnCardClickListner {
            void OnCardClicked(View view, int position);
        }

        public void setOnCardClickListner(OnCardClickListner onCardClickListner) {
            this.onCardClickListner = onCardClickListner;
        }
    }

在此之后，您将在活动中获得此重写方法。

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@Override
    public void OnCardClicked(View view, int position) {
        Log.d("OnClick","Card Position" + position);
    }
相关讨论

>RecyclerView与ListView有何不同？

一个区别是，有一个带有RecyclerView的LayoutManager类，通过它，您可以像管理RecyclerView那样管理您的EDOCX1。-

Horizontal or Vertical scrolling by LinearLayoutManager

GridLayout by GridLayoutManager

Staggered GridLayout by StaggeredGridLayoutManager

与RecyclerView的水平滚动类似-

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LinearLayoutManager llm = new LinearLayoutManager(context);
llm.setOrientation(LinearLayoutManager.HORIZONTAL);
recyclerView.setLayoutManager(llm);

如何把所有的东西放在一起举例…

  • onclick()处理
  • 光标-RecyclerView

  • 取景器类型

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    public class OrderListCursorAdapter extends CursorRecyclerViewAdapter<OrderListCursorAdapter.ViewHolder> {

    private static final String TAG = OrderListCursorAdapter.class.getSimpleName();
    private static final int ID_VIEW_HOLDER_ACTUAL = 0;
    private static final int ID_VIEW_HOLDER = 1;

    public OrderListCursorAdapter(Context context, Cursor cursor) {
        super(context, cursor);
    }

    public static class ViewHolderActual extends ViewHolder {
        private static final String TAG = ViewHolderActual.class.getSimpleName();
        protected IViewHolderClick listener;
        protected Button button;

        public ViewHolderActual(View v, IViewHolderClick listener) {
            super(v, listener);
            this.listener = listener;
            button = (Button) v.findViewById(R.id.orderList_item_button);
            button.setOnClickListener(this);
        }

        public void initFromData(OrderData data) {
            Log.d(TAG,"><initFromData(data=" + data +")");
            orderId = data.getId();
            vAddressStart.setText(data.getAddressStart());
            vAddressEnd.setText(data.getAddressEnd());
        }

        @Override
        public void onClick(View view) {
            if (view instanceof Button) {
                listener.onButtonClick((Button) view, getPosition(), this);
            } else {
                super.onClick(view);
            }
        }

        public interface IViewHolderClick extends ViewHolder.IViewHolderClick {
            public void onButtonClick(Button button, int position, ViewHolder viewHolder);
        }
    }

    public static class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
        private static final String TAG = ViewHolder.class.getSimpleName();
        protected long orderId;
        protected IViewHolderClick listener;
        protected TextView vAddressStart;
        protected TextView vAddressEnd;
        protected TextView vStatus;

        public ViewHolder(View v, IViewHolderClick listener) {
            super(v);
            this.listener = listener;
            v.setOnClickListener(this);

            vAddressStart = (TextView) v.findViewById(R.id.addressStart);
            vAddressEnd = (TextView) v.findViewById(R.id.addressEnd);
            vStatus = (TextView) v.findViewById(R.id.status);
        }

        public void initFromData(OrderData data) {
            Log.d(TAG,"><initFromData(data=" + data +")");
            orderId = data.getId();
            vAddressStart.setText(data.getAddressStart());
            vAddressEnd.setText(data.getAddressEnd());
        }

        public long getOrderId() {
            return orderId;
        }

        @Override
        public void onClick(View view) {
            listener.onCardClick(view, getPosition(), this);
        }

        public interface IViewHolderClick {
            public void onCardClick(View view, int position, ViewHolder viewHolder);
        }
    }

    @Override
    public int getItemViewType(int position) {
        return position == 0 ? ID_VIEW_HOLDER_ACTUAL : ID_VIEW_HOLDER;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        Log.d(TAG,">>onCreateViewHolder(parent=" + parent +", viewType=" + viewType +")");

        ViewHolder result;

        switch (viewType) {
            case ID_VIEW_HOLDER_ACTUAL: {
                View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_layout_actual, parent, false);
                result = new ViewHolderActual(itemView, new ViewHolderActual.IViewHolderClick() {
                    @Override
                    public void onCardClick(View view, int position, ViewHolder viewHolder) {
                        Log.d(TAG,"><onCardClick(view=" + view +", position=" + position +", viewHolder=" + viewHolder +")");
                        Intent intent = new Intent(view.getContext(), OrderDetailActivity.class);
                        intent.putExtra(OrderDetailActivity.ARG_ORDER_ID, viewHolder.getOrderId());
                        view.getContext().startActivity(intent);
                    }

                    @Override
                    public void onButtonClick(Button button, int position, ViewHolder viewHolder) {
                        Log.d(TAG,"><onButtonClick(button=" + button +", position=" + position +", viewHolder=" + viewHolder +")");
                        Intent intent = new Intent(button.getContext(), OrderMapActivity.class);
                        intent.putExtra(OrderMapActivity.ARG_ORDER_ID, viewHolder.getOrderId());
                        button.getContext().startActivity(intent);
                    }
                });
                break;
            }
            case ID_VIEW_HOLDER:
            default: {
                View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_layout, parent, false);
                result = new ViewHolder(itemView, new ViewHolder.IViewHolderClick() {
                    @Override
                    public void onCardClick(View view, int position, ViewHolder viewHolder) {
                        Log.d(TAG,"><onCardClick(view=" + view +", position=" + position +", viewHolder=" + viewHolder +")");
                        Intent intent = new Intent(view.getContext(), OrderDetailActivity.class);
                        intent.putExtra(OrderDetailActivity.ARG_ORDER_ID, viewHolder.getOrderId());
                        view.getContext().startActivity(intent);
                    }
                });
                break;
            }
        }

        Log.d(TAG,"<<onCreateViewHolder(parent=" + parent +", viewType=" + viewType +")=" + result);
        return result;
    }

    @Override
    public void onBindViewHolder(ViewHolder viewHolder, Cursor cursor) {
        Log.d(TAG,"><onBindViewHolder(viewHolder=" + viewHolder +", cursor=" + cursor +")");
        final OrderData orderData = new OrderData(cursor);
        viewHolder.initFromData(orderData);
    }
    }

跟进MLProgrammer CIM出色的RXJava解决方案

消耗/观察点击

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Consumer<String> mClickConsumer = new Consumer<String>() {
        @Override
        public void accept(@NonNull String element) throws Exception {
            Toast.makeText(getApplicationContext(), element +" was clicked", Toast.LENGTH_LONG).show();
        }
    };

ReactiveAdapter rxAdapter = new ReactiveAdapter();
rxAdapter.getPositionClicks().subscribe(mClickConsumer);

RXJava 2 +

修改原始tl；dr为：

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public Observable<String> getPositionClicks(){
    return onClickSubject;
}

取下PublishSubject#asObservable()。只需返回PublishSubject，它是Observable。

相关讨论

据我所知，MLProgrammer CIM Answer只需执行以下操作：

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class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
    private ImageView image;
    private TextView title;
    private TextView price;

    public MyViewHolder(View itemView) {
        super(itemView);
        image = (ImageView)itemView.findViewById(R.id.horizontal_list_image);
        title = (TextView)itemView.findViewById(R.id.horizontal_list_title);
        price = (TextView)itemView.findViewById(R.id.horizontal_list_price);
        image.setOnClickListener(this);
        title.setOnClickListener(this);
        price.setOnClickListener(this);
    }


    @Override
    public void onClick(View v) {
        Toast.makeText(context,"Item click nr:"+getLayoutPosition(), Toast.LENGTH_SHORT).show();
    }
}

我这样做，很简单：

只需为单击的RecyclerView位置添加一行：

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int position = getLayoutPosition()

视点类的完整代码：

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private class ChildViewHolder extends RecyclerView.ViewHolder {
        public ImageView imageView;
        public TextView txtView;

        public ChildViewHolder(View itemView) {
            super(itemView);
            imageView= (ImageView)itemView.findViewById(R.id.imageView);
            txtView= (TextView) itemView.findViewById(R.id.txtView);
            itemView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    Log.i("RecyclerView Item Click Position", String.valueOf(getLayoutPosition()));
                }
            });
        }
    }

希望这对你有帮助。

在阅读了@mlprogrammer cim的答案之后，下面是我的代码：

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class NormalViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{

    @Bind(R.id.card_item_normal)
    CardView cardView;

    public NormalViewHolder(View itemView) {
        super(itemView);
        ButterKnife.bind(this, itemView);
        cardView.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        if(v instanceof CardView) {
            // use getAdapterPosition() instead of getLayoutPosition()
            int itemPosition = getAdapterPosition();
            removeItem(itemPosition);
        }
    }
}

我使用此方法从RecyclerView开始一个意图：

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@Override
 public void onBindViewHolder(ViewHolder viewHolder, int i) {

    final MyClass myClass = mList.get(i);
    viewHolder.txtViewTitle.setText(myclass.name);
   ...
    viewHolder.itemView.setOnClickListener(new View.OnClickListener() {
      @Override
       public void onClick(View v){
             Intent detailIntent = new Intent(mContext, type.class);                                                            
             detailIntent.putExtra("MyClass", myclass);
             mContext.startActivity(detailIntent);
       }
}
);
相关讨论

如果您有一个pojos列表，并且希望从适配器外部通过单击检索一个pojos，那么这是一种非常容易实现它的方法。

在适配器中，为单击事件创建一个侦听器，并创建一个方法来设置它：

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public class MyAdapter extends RecyclerView.Adapter<SitesListAdapter.ViewHolder> {
...
private List<MyPojo> mMyPojos;
private static OnItemClickListener mOnItemClickListener;

...
public interface OnItemClickListener {
    public void onItemClick(MyPojo pojo);
}

...
public void setOnItemClickListener(OnItemClickListener onItemClickListener){
    mOnItemClickListener = onItemClickListener;
}
...

}

在视图持有者中，实现onclickListener并创建一个类成员来临时存储视图所呈现的POJO，这样(这是一个示例，创建一个setter会更好)：

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public static class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
    public MyPojo mCurrentPojo;
    ...
    public ViewHolder(View view) {
        super(v);
        ...
        view.setOnClickListener(this); //You could set this on part of the layout too
    }

    ...
    @Override
    public void onClick(View view) {
        if(mOnItemClickListener != null && mCurrentPojo != null){
            mOnItemClickListener.onItemClick(mCurrentPojo);
        }
    }

回到适配器中，在绑定视窗夹时设置当前POJO(如果当前视图没有，则设置为空)：

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@Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
    final MyPojo currentPojo = mMyPojos.get(position);
    holder.mCurrentPojo = currentPojo;
    ...

就是这样，现在您可以像这样从片段/活动中使用它：

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    mMyAdapter.setOnItemClickListener(new mMyAdapter.OnItemClickListener() {
        @Override
        public void onItemClick(MyPojo pojo) {
            //Do whatever you want with your pojo here
        }
    });
相关讨论

RecyclerView没有onItemClickListener，因为RecyclerView负责回收视图(惊喜！)，因此视图的责任是循环使用来处理它接收到的单击事件。

这实际上使它更容易使用，特别是如果你有可以在多个地方点击的项目。

无论如何，检测点击一个RecyclerView项目是非常容易的。您所需要做的就是定义一个接口(如果您不使用Kotlin，在这种情况下，您只需传入一个lambda)：

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public class MyAdapter extends RecyclerView.Adapter<MyViewHolder> {
    private final Clicks clicks;

    public MyAdapter(Clicks clicks) {
        this.clicks = clicks;
    }

    private List<MyObject> items = Collections.emptyList();

    public void updateData(List<MyObject> items) {
        this.items = items;
        notifyDataSetChanged(); // TODO: use ListAdapter for diffing instead if you need animations
    }

    public interface Clicks {
        void onItemSelected(MyObject myObject, int position);
    }

    public class MyViewHolder extends RecyclerView.ViewHolder {
        private MyObject myObject;    

        public MyViewHolder(View view) {
            super(view);
            // bind views
            view.setOnClickListener((v) -> {
                int adapterPosition = getAdapterPosition();
                if(adapterPosition >= 0) {
                    clicks.onItemSelected(myObject, adapterPosition);
                }
            });
        }

        public void bind(MyObject myObject) {
            this.myObject = myObject;
            // bind data to views
        }
    }
}

Kotlin中的相同代码：

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class MyAdapter(val itemClicks: (MyObject, Int) -> Unit): RecyclerView.Adapter<MyViewHolder>() {
    private var items: List<MyObject> = Collections.emptyList()

    fun updateData(items: List<MyObject>) {
        this.items = items
        notifyDataSetChanged() // TODO: use ListAdapter for diffing instead if you need animations
    }

    inner class MyViewHolder(val myView: View): RecyclerView.ViewHolder(myView) {
        private lateinit var myObject: MyObject

        init {
            // binds views
            myView.onClick {
                val adapterPosition = getAdapterPosition()
                if(adapterPosition >= 0) {
                    itemClicks.invoke(myObject, adapterPosition)
                }
            }
        }

        fun bind(myObject: MyObject) {
            this.myObject = myObject
            // bind data to views
        }
    }
}

请看我的方法：

首先声明这样的接口：

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/**
 * Interface used for delegating item click events in a {@link android.support.v7.widget.RecyclerView}
 * Created by Alex on 11/28/2015.
 */
  public interface OnRecyclerItemClickListener<T> {

     /**
      * Called when a click occurred inside a recyclerView item view
      * @param view that was clicked
      * @param position of the clicked view
      * @param item the concrete data that is displayed through the clicked view
      */
      void onItemClick(View view, int position, T item);
   }

然后创建适配器：

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public class CustomRecyclerAdapter extends RecyclerView.Adapter {      

    private class InternalClickListener implements View.OnClickListener{

      @Override
      public void onClick(View v) {
        if(mRecyclerView != null && mItemClickListener != null){
            // find the position of the item that was clicked
            int position = mRecyclerView.getChildAdapterPosition(v);
            Data data = getItem(position);
            // notify the main listener
            mItemClickListener.onItemClick(v, position, data);
        }
    }
}

private final OnRecyclerItemClickListener mItemClickListener;
private RecyclerView mRecyclerView;    
private InternalClickListener mInternalClickListener;


/**
 *
 * @param itemClickListener used to trigger an item click event
 */
public PlayerListRecyclerAdapter(OnRecyclerItemClickListener itemClickListener){        
    mItemClickListener = itemClickListener;
    mInternalClickListener = new InternalClickListener();
}

@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
   View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.recycler_item, parent, false);

    v.setOnClickListener(mInternalClickListener);

    ViewHolder viewHolder = new ViewHolder(v);
    return viewHolder;
}

@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
    // do your binding here
}

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

@Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
    super.onAttachedToRecyclerView(recyclerView);

    mRecyclerView = recyclerView;
}

@Override
public void onDetachedFromRecyclerView(RecyclerView recyclerView) {
    super.onDetachedFromRecyclerView(recyclerView);

    mRecyclerView = null;
}

public Data getItem(int position){
    return mDataset.get(position);
}
}

现在让我们看看如何从一个片段中整合这个：

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public class TestFragment extends Fragment implements OnRecyclerItemClickListener<Data>{
   private RecyclerView mRecyclerView;

   @Override
   public void onItemClick(View view, int position, Data item) {
     // do something
   }

   @Override
   public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
      return inflater.inflate(R.layout.test_fragment, container, false);
   }

   @Override
   public void onViewCreated(View view, Bundle savedInstanceState) {
      mRecyclerView = view.findViewById(idOfTheRecycler);
      mRecyclerView .setAdapter(new CustomRecyclerAdapter(this));
   }

如果要将onclick()添加到项的子视图中，例如项中的一个按钮，我发现您可以在自己的recyclerview.adapter的onCreateViewholder()中轻松执行此操作，如下所示：

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        @Override
        public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            View v = LayoutInflater
                    .from(parent.getContext())
                    .inflate(R.layout.cell, null);

            Button btn = (Button) v.findViewById(R.id.btn);
            btn.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    //do it
                }
            });

            return new MyViewHolder(v);
        }

我不知道这是不是一个好办法，但效果很好。如果有人有更好的想法，很高兴告诉我并纠正我的答案！：)

是的，你可以

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public ViewHolder onCreateViewHolder(ViewGroup parent,int viewType) {

    //inflate the view

    View view = LayoutInflator.from(parent.getContext()).inflate(R.layout.layoutID,null);

    ViewHolder holder = new ViewHolder(view);

    //here we can set onClicklistener
    view.setOnClickListener(new  View.OnClickListeener(){
        public void onClick(View v)
        {
            //action
        }
    });

return holder;

在这里，您可以处理多个onclick，见下面的代码，它是非常有效的

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    public class RVNewsAdapter extends RecyclerView.Adapter<RVNewsAdapter.FeedHolder> {

    private Context context;
    List<News> newsList;
    // Allows to remember the last item shown on screen
    private int lastPosition = -1;

    public RVNewsAdapter(List<News> newsList, Context context) {
        this.newsList = newsList;
        this.context = context;
    }

    public static class FeedHolder extends RecyclerView.ViewHolder implements OnClickListener {

        ImageView img_main;
        TextView tv_title;
        Button bt_facebook, bt_twitter, bt_share, bt_comment;


        public FeedHolder(View itemView) {
            super(itemView);

            img_main = (ImageView) itemView.findViewById(R.id.img_main);
            tv_title = (TextView) itemView.findViewById(R.id.tv_title);
            bt_facebook = (Button) itemView.findViewById(R.id.bt_facebook);
            bt_twitter = (Button) itemView.findViewById(R.id.bt_twitter);
            bt_share = (Button) itemView.findViewById(R.id.bt_share);
            bt_comment = (Button) itemView.findViewById(R.id.bt_comment);

            img_main.setOnClickListener(this);
            bt_facebook.setOnClickListener(this);
            bt_twitter.setOnClickListener(this);
            bt_comment.setOnClickListener(this);
            bt_share.setOnClickListener(this);

        }


        @Override
        public void onClick(View v) {

            if (v.getId() == bt_comment.getId()) {

                Toast.makeText(v.getContext(),"Comment " , Toast.LENGTH_SHORT).show();

            } else if (v.getId() == bt_facebook.getId()) {

                Toast.makeText(v.getContext(),"Facebook " , Toast.LENGTH_SHORT).show();

            } else if (v.getId() == bt_twitter.getId()) {

                Toast.makeText(v.getContext(),"Twitter " , Toast.LENGTH_SHORT).show();

            } else if (v.getId() == bt_share.getId()) {

                Toast.makeText(v.getContext(),"share " , Toast.LENGTH_SHORT).show();

            }
            else {
                Toast.makeText(v.getContext(),"ROW PRESSED =" + String.valueOf(getAdapterPosition()), Toast.LENGTH_SHORT).show();
            }
        }
    }

    @Override
    public void onAttachedToRecyclerView(RecyclerView recyclerView) {
        super.onAttachedToRecyclerView(recyclerView);
    }

    @Override
    public FeedHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.feed_row, parent, false);
        FeedHolder feedHolder = new FeedHolder(view);

        return feedHolder;
    }

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

        holder.tv_title.setText(newsList.get(position).getTitle());


        // Here you apply the animation when the view is bound
        setAnimation(holder.img_main, position);
    }

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


    /**
     * Here is the key method to apply the animation
     */
    private void setAnimation(View viewToAnimate, int position) {
        // If the bound view wasn't previously displayed on screen, it's animated
        if (position > lastPosition) {
            Animation animation = AnimationUtils.loadAnimation(context, android.R.anim.slide_in_left);
            viewToAnimate.startAnimation(animation);
            lastPosition = position;
        }
    }


}
相关讨论

修改了我的评论…

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public class MyViewHolder extends RecyclerView.ViewHolder {

        private Context mContext;

        public MyViewHolder(View itemView) {
            super(itemView);

            mContext = itemView.getContext();

            itemView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {

                    int itemPosition = getLayoutPosition();
                    Toast.makeText(mContext,"" + itemPosition, Toast.LENGTH_SHORT).show();

                }
            });
        }
相关讨论

检查一下这个，我已经用一种适当的方式实现了所有的事情。

RecyclerViewHolder类

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public class RecyclerViewHolder extends RecyclerView.ViewHolder  {

    //view holder is for girdview as we used in the listView
    public ImageView imageView,imageView2;
    public RecyclerViewHolder(View itemView) {
        super(itemView);
        this.imageView=(ImageView)itemView.findViewById(R.id.image);
    }

}

适配器

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public class RecyclerView_Adapter extends RecyclerView.Adapter<RecyclerViewHolder> {

    //RecyclerView will extend to recayclerview Adapter
    private ArrayList<ModelClass> arrayList;
    private Context context;
    private static RecyclerViewClickListener itemListener;
    //constructor of the RecyclerView Adapter
    RecyclerView_Adapter(Context context,ArrayList<ModelClass> arrayList,RecyclerViewClickListener itemListener){
        this.context=context;
        this.arrayList=arrayList;
        this.itemListener=itemListener;
    }

    @Override
    public RecyclerViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        //this method will inflate the custom layout and return as viewHolder
        LayoutInflater layoutInflater=LayoutInflater.from(parent.getContext());
        ViewGroup mainGroup=(ViewGroup) layoutInflater.inflate(R.layout.single_item,parent,false);
        RecyclerViewHolder listHolder=new RecyclerViewHolder(mainGroup);

        return listHolder;
    }

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

        final ModelClass modelClass=arrayList.get(position);
        //holder
        RecyclerViewHolder mainHolder=(RecyclerViewHolder)holder;
        //convert the drawable image into bitmap
        Bitmap image= BitmapFactory.decodeResource(context.getResources(),modelClass.getImage());
        //set the image into imageView
        mainHolder.imageView.setImageBitmap(image);
        //to handle on click event when clicked on the recyclerview item and
        // get it through the RecyclerViewHolder class we have defined the views there
        mainHolder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //get the position of the image which is clicked
             itemListener.recyclerViewListClicked(v,position);
            }
        });

    }

    @Override
    public int getItemCount() {
        return (null!=arrayList?arrayList.size():0);
    }
}

界面

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public interface RecyclerViewClickListener {

    //this is method to handle the event when clicked on the image in Recyclerview
    public void recyclerViewListClicked(View v,int position);
}

//and to call this method in activity
RecyclerView_Adapter adapter=new RecyclerView_Adapter(Wallpaper.this,arrayList,this);
        recyclerView.setAdapter(adapter);
        adapter.notifyDataSetChanged();


    @Override
    public void  recyclerViewListClicked(View v,int position){

        imageView.setImageResource(wallpaperImages[position]);

    }
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 main_recyclerview.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {
        @Override
        public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e)
        {
            int position=rv.getChildAdapterPosition(rv.findChildViewUnder(e.getX(),e.getY()));

            switch (position)
            {
                case 0:
                {
                    wifi(position);
                    adapter2.notifyDataSetChanged();
                }
                break;

                case 1:
                {
                    sound(position);
                    adapter2.notifyDataSetChanged();
                }
                break;

                case 2:
                {
                    bluetooth(position);
                    adapter2.notifyDataSetChanged();
                }
                break;


            }
            return true;
        }

        @Override
        public void onTouchEvent(RecyclerView rv, MotionEvent e)
        {

        }

        @Override
        public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {

        }
    });
相关讨论

it worked for me. Hope it will help. Most simplest way.

内视图保持架

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class GeneralViewHolder extends RecyclerView.ViewHolder {
    View cachedView = null;

    public GeneralViewHolder(View itemView) {
        super(itemView);
        cachedView = itemView;
    }

在OnBindViewHolder()内

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@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {
            final GeneralViewHolder generalViewHolder = (GeneralViewHolder) holder;
            generalViewHolder.cachedView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Toast.makeText(context,"item Clicked at"+position, Toast.LENGTH_SHORT).show();
                }
            });

告诉我，你对这个解决方案有什么问题吗？

访问rowLayout(cell)的mainView为您输入RecyclerView，并在OnBindViewHolder中编写以下代码：

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    @Override
    public void onBindViewHolder(MyViewHolder holder, final int position) {
        Movie movie = moviesList.get(position);
        holder.mainView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                System.out.println("pos" + position);
            }
        });
    }

这对我很有用：

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@Override
public void onBindViewHolder(PlacesListViewAdapter.ViewHolder holder, int position) {
    ----
    ----
    ----
    // Set setOnClickListener(holder);
}


@Override
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

    ----
    ----
    ----

    @Override
    public void onClick(View view) {
        // Use to get the item clicked getAdapterPosition()
    }
}
相关讨论

而不是在视图保持架内实现interface view.onclickListener，或者在活动中创建和接口并实现接口。我将此代码用于OnClickListener实现的简单操作。

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public static class SimpleStringRecyclerViewAdapter
            extends RecyclerView.Adapter<SimpleStringRecyclerViewAdapter.ViewHolder> {

        // Your initializations goes here...
        private List<String> mValues;

        public static class ViewHolder extends RecyclerView.ViewHolder {

            //create a variable mView
            public final View mView;

            /*All your row widgets goes here
            public final ImageView mImageView;
            public final TextView mTextView;*/

            public ViewHolder(View view) {
                super(view);
                //Initialize it here
                mView = view;

                /* your row widgets initializations goes here
                mImageView = (ImageView) view.findViewById(R.id.avatar);
                mTextView = (TextView) view.findViewById(android.R.id.text1);*/
            }
        }

        public String getValueAt(int position) {
            return mValues.get(position);
        }

        public SimpleStringRecyclerViewAdapter(Context context, List<String> items) {

            mBackground = mTypedValue.resourceId;
            mValues = items;
        }

        @Override
        public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            View view = LayoutInflater.from(parent.getContext())
                    .inflate(R.layout.list_item, parent, false);
            view.setBackgroundResource(mBackground);
            return new ViewHolder(view);
        }

        @Override
        public void onBindViewHolder(final ViewHolder holder, int position) {
            holder.mBoundString = mValues.get(position);
            holder.mTextView.setText(mValues.get(position));

            //Here it is simply write onItemClick listener here
            holder.mView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Context context = v.getContext();
                    Intent intent = new Intent(context, ExampleActivity.class);

                    context.startActivity(intent);
                }
            });
        }

        @Override
        public int getItemCount() {
            return mValues.size();
        }
    }
相关讨论

我长期使用RecyclerView。我们可以使用类似Play Store应用程序的RecyclerView实现多视图enter image description here

在这种情况下，RecyclerView的适配器具有多类型数据集。当我们单击Diffrent数据集时。应返回多类型数据集，而不是单个数据类型。所以我认为这就是为什么谷歌删除recylwinew onclick listener的原因。

RecyclerView动画尚未测试，另一个正常。我想它已经被优化到最大了。接口还有其他用途，可以暂时忽略。

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public abstract class BaseAdapterRV<VH extends BaseViewHolder> extends RecyclerView.Adapter<VH> implements AdapterInterface {
    public final String TAG = getClass().getSimpleName();

    protected final Activity mActivity;
    protected final LayoutInflater mInflater;
    protected ItemClickInterface<?, Integer> mListener;

    public BaseAdapterRV(Activity activity) {
        mActivity = activity;
        mInflater = LayoutInflater.from(mActivity);
    }

    @Override
    public final VH onCreateViewHolder(ViewGroup parent, int viewType) {
        return onCreateViewHolder(parent, viewType, mInflater);
    }

    @Override
    public final void onBindViewHolder(VH holder, int position) {
        holder.itemView.setTag(R.id.tag_view_click, position);
        //创建点击事件
        holder.itemView.setOnClickListener(mListener);
        holder.itemView.setOnLongClickListener(mListener);
        onBindVH(holder, position);
    }


    ///////////////////////////////////////////////////////////////////////////
    // 以下是增加的方法
    ///////////////////////////////////////////////////////////////////////////

    /**
     * 注意!涉及到notifyItemInserted刷新时立即获取position可能会不正确
     * 里面也有onItemLongClick
     */
    public void setOnItemClickListener(ItemClickInterface<?, Integer> listener) {
        mListener = listener;
        notifyDataSetChanged();
    }

    @NonNull
    protected abstract VH onCreateViewHolder(ViewGroup parent, int viewType, LayoutInflater inflater);

    protected abstract void onBindVH(VH holder, int position);

}

这是接口

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/**
 * OnItemClickListener的接口
 * 见子类实现{@link OnItemClickListener}{@link OnItemItemClickListener}
 */
public interface ItemClickInterface<DATA1, DATA2> extends View.OnClickListener, View.OnLongClickListener {

    void onItemClick(DATA1 data1, DATA2 data2);

    boolean onItemLongClick(DATA1 data1, DATA2 data2);
}

这是一个抽象类

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public abstract class OnItemClickListener<DATA> implements ItemClickInterface<View, DATA> {
    @Override
    public void onClick(View v) {
        onItemClick(v, (DATA) v.getTag(R.id.tag_view_click));
    }

    @Override
    public boolean onLongClick(View v) {
        return onItemLongClick(v, (DATA) v.getTag(R.id.tag_view_click));
    }

    @Override
    public boolean onItemLongClick(View view, DATA data) {
        return false;
    }
}

你只需要它

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    mAdapter.setOnItemClickListener(new OnItemClickListener<Integer>() {
        @Override
        public void onItemClick(View view, Integer integer) {

        }

        @Override
        public boolean onItemLongClick(View view, Integer integer) {
            return true;
        }
    });
相关讨论

使用PlaceholderView

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@Layout(R.layout.item_view_1)
public class View1{

    @View(R.id.txt)
    public TextView txt;

    @Resolve
    public void onResolved() {
        txt.setText(String.valueOf(System.currentTimeMillis() / 1000));
    }

    @Click(R.id.btn)
    public void onClick(){
        txt.setText(String.valueOf(System.currentTimeMillis() / 1000));
    }
}

我写了一个库来处理Android回收器视图项目点击事件。你可以在https://github.com/chathurahettiarachchi/recycleclick中找到整个教程。

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RecycleClick.addTo(YOUR_RECYCLEVIEW).setOnItemClickListener(new RecycleClick.OnItemClickListener() {
            @Override
            public void onItemClicked(RecyclerView recyclerView, int position, View v) {
                // YOUR CODE
            }
        });

或长按可使用

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RecycleClick.addTo(YOUR_RECYCLEVIEW).setOnItemLongClickListener(new RecycleClick.OnItemLongClickListener() {
            @Override
            public boolean onItemLongClicked(RecyclerView recyclerView, int position, View v) {
                // YOUR CODE
                return true;
            }
        });
相关讨论

使用gettag()/settag()和用于整个适配器的单击侦听器的示例：

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public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
    String[] mDataset = {"One","Two","Three" };

    private final View.OnClickListener mClickListener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Object pos = v.getTag(R.id.TAG_POSITION);
            if(pos instanceof Integer) {
                // here is your position in the dataset that was clicked
                int position = (Integer) pos;

                ...
            }
        }
    };

    class MyViewHolder extends RecyclerView.ViewHolder {
        View mItemView;
        TextView mTextView; // as example
            ...

        MyViewHolder(View itemLayoutView){
            super(itemLayoutView);

            mItemView = itemLayoutView;
            mTextView = itemLayoutView.findViewById(R.id.my_text_view_id);
            ....
            itemLayoutView.setOnClickListener(mClickListener);
        }
    }

    // Provide a suitable constructor (depends on the kind of dataset)
    public MyAdapter(String[] myDataset) {
        mDataset = myDataset;
    }

    @Override
    public void onBindViewHolder(final ViewHolder holder, int position) {
        // you could use getTag() here for to get previous position
        // that used the holder and for example cancel prev async requests
        // to load images for the old position or so.
        //
        // setTag() new position that use the holder, so then user
        // will click on the itemView - you will be able to get
        // the position by getTag()
        holder.mItemView.setTag(R.id.TAG_POSITION, position);

        // - get element from your dataset at this position
        // - replace the contents of the view with that element
        holder.mTextView.setText(mDataset[position]);
    }

    @Override
    public @NonNull MyAdapter.MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View item_layout = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.my_recyclerview_item_layout, parent, false);
        ....
        return new MyViewHolder(item_layout);
    }

    @Override
    public int getItemCount() {
        return mDataset.length;
    }
}

tags.xml文件中定义的标记位置为

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 <?xml version="1.0" encoding="utf-8"?>
 <resources>
     <item name="TAG_POSITION" type="id"/>
 </resources>

最简单的方法如下：

在适配器类的开头声明全局变量：

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然后在onbindViewholder方法中设置onclickListener：

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@Override
public void onBindViewHolder(BusinessAdapter.ViewHolder holder, int position) {

    // Set up the on click listener
    yourItemView.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            Toast.makeText(mContext,Integer.toString(position),Toast.LENGTH_SHORT).show();
        }
    });

}

所有其他答案都不正确。

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