RecyclerView onClick

Question

有沒有人使用RecyclerView找到了一種方法來將onClickListener設置為RecyclerView中的項目？ 我想為每個項目的每個布局設置一個監聽器，但這似乎有點太麻煩了我確信RecyclerView有辦法監聽onClick事件，但我不太明白。

Answer 1

這是為RecyclerView<\/code>實現OnClickListener<\/code>的更好且耦合度更低的方法。

用法片段：

RecyclerView recyclerView = findViewById(R.id.recycler);
recyclerView.addOnItemTouchListener(
    new RecyclerItemClickListener(context, recyclerView ,new RecyclerItemClickListener.OnItemClickListener() {
      @Override public void onItemClick(View view, int position) {
        // do whatever
      }

      @Override public void onLongItemClick(View view, int position) {
        // do whatever
      }
    })
);

Answer 2

由於 API 發生了根本性的變化，如果您要為每個項目創建一個OnClickListener<\/code> ，我不會感到驚訝。 不過也不是那么麻煩。 在RecyclerView.Adapter<MyViewHolder><\/code>的實現中，您應該具有：

private final OnClickListener mOnClickListener = new MyOnClickListener();

@Override
public MyViewHolder onCreateViewHolder(final ViewGroup parent, final int viewType) {
    View view = LayoutInflater.from(mContext).inflate(R.layout.myview, parent, false);
    view.setOnClickListener(mOnClickListener);
    return new MyViewHolder(view);
}

Answer 3

我是這樣做的，沒有過多的類、檢測器等。我們的適配器內有簡單的代碼。 longClick 的解決方案尤其比之前介紹的更好。

public class PasswordAdapter extends RecyclerView.Adapter<PasswordAdapter.ViewHolder> {
    private static ClickListener clickListener;

    public static class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener, View.OnLongClickListener {
        TextView name;

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

        @Override
        public void onClick(View v) {
            clickListener.onItemClick(getAdapterPosition(), v);
        }

        @Override
        public boolean onLongClick(View v) {
            clickListener.onItemLongClick(getAdapterPosition(), v);
            return false;
        }
    }

    public void setOnItemClickListener(ClickListener clickListener) {
        PasswordAdapter.clickListener = clickListener;
    }

    public interface ClickListener {
        void onItemClick(int position, View v);
        void onItemLongClick(int position, View v);
    }
}

Answer 4

查看viewHolder<\/code>對此<\/a>的<\/strong>評論鏈接的類似問題<\/a>，它在OnClickListener<\/code>中實現了 OnClickListener 接口。

這是ViewHolder<\/code>的一個簡單示例：

    TextView textView;//declare global with in adapter class

public static class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

      private ViewHolder(View itemView) {
            super(itemView);
            itemView.setOnClickListener(this);
            textView = (TextView)view.findViewById(android.R.id.text1);

      }

      @Override
      public void onClick(View view) {
            Toast.makeText(view.getContext(), "position = " + getLayoutPosition(), Toast.LENGTH_SHORT).show();

         //go through each item if you have few items within recycler view
        if(getLayoutPosition()==0){
           //Do whatever you want here

        }else if(getLayoutPosition()==1){ 
           //Do whatever you want here         

        }else if(getLayoutPosition()==2){

        }else if(getLayoutPosition()==3){

        }else if(getLayoutPosition()==4){

        }else if(getLayoutPosition()==5){

        }

        //or you can use For loop if you have long list of items. Use its length or size of the list as 
        for(int i = 0; i<exampleList.size(); i++){

        }


      }
  }

Answer 5

根據 Jacob Tabak 的回答（為他 +1），我能夠添加 onLongClick 監聽器：

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;

public class RecyclerItemClickListener implements RecyclerView.OnItemTouchListener {
    public interface OnItemClickListener {
        void onItemClick(View view, int position);

        void onItemLongClick(View view, int position);
    }

    private OnItemClickListener mListener;

    private GestureDetector mGestureDetector;

    public RecyclerItemClickListener(Context context, final RecyclerView recyclerView, OnItemClickListener listener) {
        mListener = listener;

        mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
            @Override
            public boolean onSingleTapUp(MotionEvent e) {
                return true;
            }

            @Override
            public void onLongPress(MotionEvent e) {
                View childView = recyclerView.findChildViewUnder(e.getX(), e.getY());

                if (childView != null && mListener != null) {
                    mListener.onItemLongClick(childView, recyclerView.getChildAdapterPosition(childView));
                }
            }
        });
    }

    @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) {
    }
}

Answer 6

這對我有用。 將onBindView<\/code> OnClickListener<\/code> 我真的不知道這是否會影響性能，但它似乎用很少的代碼就可以正常工作。

public void onBindViewHolder(ViewHolder holder, final int position) {
    holder.view.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(context, "Recycle Click" + position, Toast.LENGTH_SHORT).show();
            }
    });
}

Answer 7

這對我來說很難在活動中擁有項目單擊偵聽器，也很難為不會在項目單擊偵聽器上觸發的項目的單個視圖設置單擊偵聽器。 在玩了 Jacob Tabak 的回答之后，如果項目內沒有其他觸摸動作，我尊重他對項目點擊的回答。

我有一個自定義的OnClickListener<\/code>接口，該接口具有項目單擊事件，該事件包含被單擊項目的視圖和來自適配器的項目位置。 我在構造函數中呈現它的一個實例（或者它可以使用 setter）並將它附加到視圖持有者容器單擊偵聽器。

我在適配器中還有其他點擊監聽器（可以在視圖持有者中），它將處理來自容器的當前視圖點擊。

 public class MyRecyclerAdapter extends RecyclerView.Adapter<MyViewHolder> {

private ArrayList<String> mData;
private OnItemClickListener mOnItemClickListener;

public interface OnItemClickListener {
    public void onItemClick(View view, int position);
}

public MyRecyclerAdapter(ArrayList<String> itemsData,
        OnItemClickListener onItemClickListener) {
    mOnItemClickListener = onItemClickListener;
    this.mData = itemsData;
}

@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent,
        int viewType) {

    View layoutView = LayoutInflater.from(mContext).inflate(
            R.layout.list_item, parent, false);

    final MyViewHolder viewHolder = new MyViewHolder(layoutView);

    viewHolder.container.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            mOnItemClickListener.onItemClick(v, viewHolder.getAdapterPosition());
        }
    });

    viewHоlder.button.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            //do button click work here with
            // mData.get( viewHolder.getAdapterPosition() );
        }
    });

    return viewHolder;
}

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

Answer 8

這就是我最終需要的，以防有人發現它有用：

public static class ViewHolder extends RecyclerView.ViewHolder {

    public ViewHolder(View item) {

        super(item);
        item.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.d("RecyclerView", "onClick：" + getAdapterPosition());
            }
        });

    }
}

Answer 9

我對項目和子項目的RecyclerView<\/code>的onItemClickListener<\/code>有很好的解決方案

第 1 步 -<\/strong>創建接口

public interface OnRecyclerViewItemClickListener
{
    /**
     * Called when any item with in recyclerview or any item with in item
     * clicked
     * 
     * @param position
     *            The position of the item
     * @param id
     *            The id of the view which is clicked with in the item or
     *            -1 if the item itself clicked
     */
    public void onRecyclerViewItemClicked(int position, int id);
}

Answer 10

這就是我所做的。 此解決方案同時支持 RecyclerView 項目和 RecyclerView 項目內部的視圖（內部視圖）的 onClick 和 onLongClick。

我在我選擇的觀點上標記 viewHolder ：

public RecyclerViewAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.layout_item, null);
    ViewHolder viewHolder = new ViewHolder(itemView);

    itemView.setOnClickListener( this);
    itemView.setOnLongClickListener(this);
    viewHolder.imageIV.setOnClickListener(this);
    viewHolder.imageIV.setOnLongClickListener(this);

    viewHolder.imageIV.setTag(viewHolder);
    itemView.setTag(viewHolder);

    return viewHolder;
}

Answer 11

有更簡單的方法可以做到這一點。 只需在根視圖上單擊onBindViewHolder<\/code> 。

考慮這是您對適配器的看法，

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:id="@+id/linearlayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

        <TextView
            android:id="@+id/textview"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="1dp"
            android:textSize="15sp" />
</LinearLayout>

Answer 12

您可以將clickListener<\/code>給Adapter<\/code> 。

在您的Activity<\/code>中：

private View.OnClickListener mItemClick = new View.OnClickListener() {

    @Override
    public void onClick(View v) {
        Intent intent = null;
        int position = list.getChildPosition(v);
        switch (position) {
            case 0:
                intent = new Intent(MainActivity.this, LeakCanaryActivity.class);
                break;
            case 1:
                intent = new Intent(MainActivity.this, ButterKnifeFragmentActivity.class);
                break;
        }
        if (intent != null) {
            MainActivity.this.startActivity(intent);
        }
    }
};

Answer 13

方式太簡單和有效。

而不是在視圖持有者內實現接口View.OnClickListener<\/code>或在您的活動中創建接口和實現接口 - 我使用此代碼來簡單地實現OnClickListener<\/code> 。

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();
        }
    }

Answer 14

您可以在 ViewHolder 類中實現 OnClickListener

public static class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
        public Item item
        @InjectView(R.id.tv_title)
        public TextView tvTitle;
        @InjectView(R.id.rl_row)
        public RelativeLayout rlRow;

        public ViewHolder(View v) {
            super(v);
            ButterKnife.inject(this, v);
            v.setOnClickListener(this);
        }

        @Override
        public void onClick(View view) {
            Log.e("item title",item.getTitle());
        }
    }

Answer 15

如果您想在單個項目上捕獲單擊事件，則只需在OnClickListener<\/code>類中實現 OnClickListener ，然后在單個視圖或整個ViewHolder<\/code>上設置單擊偵聽itemView<\/code> 。

以下示例顯示相同

public  class ContactViewHolder extends RecyclerView.ViewHolder implements OnClickListener
    {
        TextView txt_title,txt_name,txt_email;

        public ContactViewHolder(View itemView) 
        {
            super(itemView);
            txt_title = (TextView)itemView.findViewById(R.id.txt_title);
            txt_name  = (TextView)itemView.findViewById(R.id.txt_name);
            txt_email = (TextView)itemView.findViewById(R.id.txt_email);

            txt_name.setOnClickListener(this);
            txt_email.setOnClickListener(this);
            itemView.setOnClickListener(this);
        }

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub

            if(v == itemView)
            {
                Toast.makeText(RecyclerDemoActivity.this, "Visiting Card Clicked is ==>"+txt_name.getText(), Toast.LENGTH_SHORT).show();
            }

            if(v == txt_name)
            {
                Toast.makeText(RecyclerDemoActivity.this, "Name ==>"+txt_name.getText(), Toast.LENGTH_SHORT).show();
            }

            if(v == txt_email)
            {
                Toast.makeText(RecyclerDemoActivity.this, "Email ==>"+txt_email.getText(), Toast.LENGTH_SHORT).show();
            }
        }

    }
} 

Answer 16

我為android開發了一個輕量級的庫，你可以訪問https://github.com/ChathuraHettiarachchi/RecycleClick

並遵循以下示例

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

Answer 17

到目前為止發布的所有答案都是很好的解決方案，但是如果您不想處理太多的實現細節，只是希望它與 ListView 的工作方式類似，我建議使用 TwoWay-View，如下所示：

https:\/\/github.com\/lucasr\/twoway-view<\/a>

請注意，此實現還支持對項目的長按，以及對按下狀態的支持（這是該問題的其他解決方案所缺乏的重要內容）。

如果您不想使用整個庫，請查看ClickItemTouchListener<\/a>類，如果需要，可以將其用作獨立的。 我目前發現的唯一問題是長按+滾動，它似乎有不正確的行為。

Answer 18

對我來說，這是最好的方法：

class YourRecyclerAdapter extends RecyclerView.Adapter<ContactViewHolder> implements View.OnClickListener { 
  ...
  @Override
  public void onClick(View view) {
        int itemPosition = vRecycle.getChildPosition(view);
        //And use itemPosition to get the item from your collection. This way you dont restrain the ViewHolder with a OnClick callback
    }
  ...
}

Answer 19

RecyclerView<\/code>沒有OnClickListener<\/code> ，必須自己實現。

我喜歡在Adapter<\/code>中添加一個OnItemClickListener<\/code>接口，並在您單擊ViewHolder<\/code>中的項目視圖時調用一個onClick<\/code>方法。 因此，管理對項目的點擊的責任不在ViewHolder<\/code>和Adapter<\/code>之外。 將決定做什么的活動或片段

向監聽器和監聽器對象添加接口。

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

  ...

  private static OnItemClickListener onItemClickListener;

  ...

  public static interface OnItemClickListener {
      public void onItemClick(View view, int position);
  }

  ...
}

Answer 20

這是我所做的閱讀更多並在此處下載要點

在這里添加相同的

CustomItemClickListener.java

public interface CustomItemClickListener {
 public void onItemClick(View v, int position);
}

ItemsListAdapter.java

public class ItemsListAdapter extends RecyclerView.Adapter<ItemsListAdapter.ViewHolder> {
ArrayList<ItemListSingleItem> data;

Context mContext;
CustomItemClickListener listener;

@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View mView = LayoutInflater.from(parent.getContext()).inflate(R.layout.items_list_single_item, parent, false);
    final ViewHolder mViewHolder = new ViewHolder(mView);
    mView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            listener.onItemClick(v, mViewHolder.getAdapterPosition());
        }
    });
    return mViewHolder;
}

@Override
public void onBindViewHolder(ViewHolder holder, int position) {
    holder.itemTitle.setText(Html.fromHtml(data.get(position).getTitle()));
    if (!TextUtils.isEmpty(data.get(position).getThumbnailURL())) {
      // I Love picasso library :) http://square.github.io/picasso/
        Picasso.with(mContext).load(data.get(position).getThumbnailURL()).error(R.drawable.ic_no_image).
                placeholder(R.drawable.ic_no_image).
                transform(new RoundedCornersTransformation(5, 0)).
                into(holder.thumbnailImage);
    } else {
        holder.thumbnailImage.setImageResource(R.drawable.ic_no_image);
    }
}


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

public ItemsListAdapter(Context mContext, ArrayList<ItemsListSingleItem> data, CustomItemClickListener listener) {
    this.data = data;
    this.mContext = mContext;
    this.listener = listener;
}

public static class ViewHolder extends RecyclerView.ViewHolder {
    public TextView itemTitle;
    public ImageView thumbnailImage;

    ViewHolder(View v) {
        super(v);
        itemTitle = (TextView) v
                .findViewById(R.id.post_title);
        thumbnailImage = (ImageView) v.findViewById(R.id.post_thumb_image);
    }
 }
}

Answer 21

不幸的是， RecyclerView<\/code>缺少ListView<\/code>內置的一些功能。 例如，添加在單擊項目時觸發的OnItemClickListener<\/code>的能力。 RecyclerView<\/code>允許您在適配器中設置OnClickListener<\/code> ，但是將單擊偵聽器從調用代碼傳遞到適配器和ViewHolder<\/code> ，對於捕獲簡單的項目單擊來說很復雜。

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) {
            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) {
        if (mOnItemClickListener != null) {
            view.setOnClickListener(mOnClickListener);
        }
        if (mOnItemLongClickListener != null) {
            view.setOnLongClickListener(mOnLongClickListener);
        }
    }

    @Override
    public void onChildViewDetachedFromWindow(View view) {

    }
};

private ItemClickSupport(RecyclerView recyclerView) {
    mRecyclerView = recyclerView;
    mRecyclerView.setTag(R.id.item_click_support, this);
    mRecyclerView.addOnChildAttachStateChangeListener(mAttachListener);
}

public static ItemClickSupport addTo(RecyclerView view) {
    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);
}
}

Answer 22

您可以在 ViewHolder 類中輕松定義setOnClickListener<\/strong> ，如下所示：

public class ViewHolder extends RecyclerView.ViewHolder {
    TextView product_name;

    ViewHolder(View itemView) {
        super(itemView);
        product_name = (TextView) itemView.findViewById(R.id.product_name);
        itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                int itemPosition = getLayoutPosition();
                Toast.makeText(getApplicationContext(), itemPosition + ":" + String.valueOf(product_name.getText()), Toast.LENGTH_SHORT).show();
            }
        });
    }
}

Answer 23

nhaarman答案的 Kotlin 實現：

mRecyclerView.addOnItemTouchListener(object  : RecyclerItemClickListener(this, mRecyclerView,object :RecyclerItemClickListener.OnItemClickListener{
            override fun onItemClick(view: View, position: Int) {

            }

            override fun onLongItemClick(view: View?, position: Int) {

            }
}){})

RecyclerItemClickListener.java ：

import android.content.Context
import android.support.v7.widget.RecyclerView
import android.view.GestureDetector
import android.view.MotionEvent
import android.view.View


open class RecyclerItemClickListener(context: Context, recyclerView: RecyclerView, private val mListener: OnItemClickListener?) : RecyclerView.OnItemTouchListener {

    private var mGestureDetector: GestureDetector

    interface OnItemClickListener {
        fun onItemClick(view: View, position: Int)

        fun onLongItemClick(view: View?, position: Int)
    }

    init {
        mGestureDetector = GestureDetector(context, object : GestureDetector.SimpleOnGestureListener() {
            override fun onSingleTapUp(e: MotionEvent): Boolean {
                return true
            }

            override fun onLongPress(e: MotionEvent) {
                val child = recyclerView.findChildViewUnder(e.x, e.y)
                if (child != null && mListener != null) {
                    mListener.onLongItemClick(child, recyclerView.getChildAdapterPosition(child))
                }
            }
        })
    }

    override fun onInterceptTouchEvent(view: RecyclerView, e: MotionEvent): Boolean {
        val childView = view.findChildViewUnder(e.x, e.y)
        if (childView != null && mListener != null && mGestureDetector.onTouchEvent(e)) {
            mListener.onItemClick(childView, view.getChildAdapterPosition(childView))
            return true
        }
        return false
    }

    override fun onTouchEvent(view: RecyclerView, motionEvent: MotionEvent) {}

    override fun onRequestDisallowInterceptTouchEvent(disallowIntercept: Boolean) {}
}

Answer 24

從上面的大多數答案中，他們似乎將 onclicklisteners 設置為單個項目。 然而，即將提供的解決方案非常簡單，但對許多人來說並不直觀。 許多人忘記了其他組件始終位於父組件中，該父組件用於在 List 或 Recycler 視圖中顯示項目。 該解決方案只是為此父視圖設置一個 onclick 偵聽器並播放輪次。 該解決方案還包括一種從列表或回收站視圖傳遞被單擊項目的位置的方法。 在這里，我們的主要根視圖是來自 android 支持庫的 CardView。 這是示例代碼

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

public static final String LOG_TAG = ListAdapter.class.getSimpleName();
private Cursor mDataset;
private Context mContext;
private ViewHolder mViewHolder;

// Provide a suitable constructor (depends on the kind of dataset)
public ListAdapter(Context context, Cursor Dataset) {
    mDataset = Dataset;
    mContext = context;
}

// Create new views (invoked by the layout manager)
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

    // create a new view
    View v = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.list_business_view, parent, false);

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

public void setData(Cursor newdata) {
    this.mDataset = newdata;
}

// Replace the contents of a view (invoked by the layout manager)
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
//Bind data to other items here. To save time, i have ommited that.
           //here is where we attach a click listerner for an item in the recycler list rather than for each element of a given item.
            holder.card.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Toast.makeText(mContext, " Just cliked item at position " + itemPosition, Toast.LENGTH_LONG).show();

            }
        });

    }
}

// Return the size of your dataset (invoked by the layout manager)
@Override
public int getItemCount() {
    if (null != mDataset) {
        return mDataset.getCount();
    }
    return 0;

}


// Provide a reference to the views for each data item
// Complex data items may need more than one view per item, and
// you provide access to all the views for a data item in a view holder
public static class ViewHolder extends RecyclerView.ViewHolder{
    // each data item is just a string in this case
    public final TextView mBusinesssName; // View for the business name
    public final TextView mBusinessCategory; //View for the category name
    public final ImageView businessImage; // View for the business category image Image
    public final TextView mBusinessDistance; // View for the distance
    public final CardView card;

    public ViewHolder(View view) {
        super(view);
        mBusinesssName = (TextView) view.findViewById(R.id.list_item_name_textview);
        mBusinessCategory = (TextView) view.findViewById(R.id.list_item_category_textview);
        mBusinessDistance = (TextView) view.findViewById(R.id.list_item_dist_textview);
        businessImage = (ImageView) view.findViewById(R.id.list_item_icon);
        card = (CardView) view.findViewById(R.id.card_view);

    }
}
}

Answer 25

這是在您的ReacyclerView<\/code>中添加的簡單明了的ViewHolder<\/code>

public static class MyViewholder extends RecyclerView.ViewHolder {

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

        itemView.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.d("Tag", "onClick：" + getAdapterPosition());
            }
        });

    }
}

Answer 26

不要重新發明輪子！ 這個特定用例的代碼包含在 Android Studio 附帶的Master/Detail Flow啟動項目中。

從 Android Studio 選擇：

1. 文件>新建>新建項目...。
2. 在Phone and Tablet選項卡中，選擇Master/Detail Flow ，如下所示。

3. 將項目創建為 Kotlin 或 Java。
4. 利潤。

我不打算在此處包含來自 google ootb 演示項目的代碼，但我將概述 google 提供的示例中的主要設計方法：

• 項目 OnClickListener 僅創建一次，並分配給RecyclerView.Adapter實現中的一個字段。
• 在onBindViewHolder()中，您應該使用holder.itemView.setOnClickListener(mOnClickListener)在 ViewHolder 實例上設置相同的、預先創建的 onClickListener 對象（避免在每次方法調用時創建新實例！ ）； 如果您需要捕獲對 ViewHolder 中某些特定元素的點擊，則擴展 ViewHolder 並將您需要的元素公開為字段，以便您可以在onBindViewHolder()中附加您需要的任何偵聽器 - 再一次，不要重新創建偵聽器每個方法調用——將它們初始化為實例字段並根據需要附加它們。
• 您可以使用.setTag()將狀態傳遞給您的 viewHolder，例如holder.itemView.setTag(mValues.get(position)); 在演示中使用。

Answer 27

根據Yigit Boyar<\/a>的說法，在 RecyclerView 上注冊點擊的最佳方法是在創建視圖時定義點擊，而不是僅僅為 onBindViewHolder 綁定的每個項目創建一個新的onBindViewHolder<\/code>

例子<\/h2>

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): BaseViewHolder<*> { val itemBinding = LayoutInflater.from(context).inflate(R.layout.my_layout, parent, false) val vh = MainViewHolder(itemBinding) vh.itemView.setOnClickListener { val pos = vh.adapterPosition if(pos != NO_POSITION){ itemClickLister.onCocktailClick(myList[pos],pos) } } return vh }<\/code><\/pre>"

Answer 28

這是我的自定義適配器的完整代碼此代碼將使用名為“list_item”的 xml 文件中定義的列表項對行進行膨脹，它還將對具有相應位置的所有列表項行執行單擊事件。

<\/blockquote>

Answer 29

我知道有很多答案，但我想我也可以提供我的實現。 （可以在我回答的另一個問題<\/a>上找到完整的詳細信息）。

因此，要添加點擊監聽器，您的內部ViewHolder<\/code>類需要實現View.OnClickListener<\/code> 。 這是因為您將為ViewHolder<\/code>的構造函數的itemView<\/code>參數設置一個OnClickListener<\/code> 。 讓我告訴你我的意思：

public class ExampleClickViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

    TextView text1, text2;

    ExampleClickViewHolder(View itemView) {
        super(itemView);

        // we do this because we want to check when an item has been clicked:
        itemView.setOnClickListener(this);

        // now, like before, we assign our View variables
        title = (TextView) itemView.findViewById(R.id.text1);
        subtitle = (TextView) itemView.findViewById(R.id.text2);
    }

    @Override
    public void onClick(View v) {
        // The user may not set a click listener for list items, in which case our listener
        // will be null, so we need to check for this
        if (mOnEntryClickListener != null) {
            mOnEntryClickListener.onEntryClick(v, getLayoutPosition());
        }
    }
}

Answer 30

public class MyViewHolder extends RecyclerView.ViewHolder {
        public TextView title, year, genre;

        public MyViewHolder(View view) {
            super(view);
            title = (TextView) view.findViewById(R.id.title);
            genre = (TextView) view.findViewById(R.id.genre);
            year = (TextView) view.findViewById(R.id.year);
            view.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Toast.makeText(context, ""+getAdapterPosition(), Toast.LENGTH_SHORT).show();
                }
            });
        }
    }

Answer 31

我們可以使用 Java 弱引用來做到這一點。 從語義上講，視圖持有者應該響應點擊事件或將其委托給正確的響應者。

我們的目標：

1. Viewholder 應該對響應事件的類一無所知，除非它實現了某個接口。<\/li>
2. 點擊處理程序應該在被點擊的視圖的 RecyclerView 中獲得位置。<\/li>
3. 我們應該能夠辨別在視圖持有者中單擊了哪個<\/em>視圖。<\/li>
4. 保持所有組件之間的松散耦合，並且不會導致任何保留周期。<\/li><\/ol>

   腳步：

   創建一個接口來處理點擊響應。

   1. 在將處理點擊的 Activity 中實現此接口。

   2. 在 RecyclerView 適配器中添加一個成員變量來保存弱引用和設置它的構造函數。

   3. 在 RecyclerView ViewHolder 中執行相同操作並添加一個成員變量來跟蹤位置。

   4. 在 ViewHolder 中設置您想要的任何視圖的點擊監聽器，然后回調到響應者以處理它們。

   5. 更改您的 onBindViewHolder 方法以在綁定時設置位置。

   6. 將響應者向下傳遞給 ViewHolder。

   7. 在響應程序中，您現在可以在視圖上使用 getId() 來確定單擊了哪個視圖。

      這里有一個要點，所以你可以看到它是如何組合在一起的： RecyclerView 點擊處理<\/a>

Answer 32

對我來說，干凈的方法就是這個。

適配器構造函數

private class EnvironmentTypeRecyclerViewAdapter extends RecyclerView.Adapter<EnvironmentTypeRecyclerViewAdapter.ViewHolder>
{
     private final EnvironmentTypeRecyclerViewAdapterListener mEnvironmentTypeRecyclerViewAdapterListener;
     private List<Environment> mEnvironmentsData;

     public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener
     {
         public ViewHolder(View v)
         {
             super(v);
             v.setOnClickListener(this);

         }

         @Override
         public void onClick(View v)
         {
              Environment environment = mEnvironmentsData.get(getAdapterPosition());
              if (mEnvironmentTypeRecyclerViewAdapterListener != null && environment != null) {
                      mEnvironmentTypeRecyclerViewAdapterListener.onListItemSelected(environment);      
              }
        }

        public EnvironmentTypeRecyclerViewAdapter(List<SmallCellEnvironment> environments, EnvironmentTypeRecyclerViewAdapterListener environmentTypeRecyclerViewAdapterListener)
        {
            mEnvironmentTypeRecyclerViewAdapterListener = environmentTypeRecyclerViewAdapterListener;
            mEnvironmentsData = environments;
        }
}

鏈接接口

private interface EnvironmentTypeRecyclerViewAdapterListener
{
    void onListItemSelected(Environment environment);
}

Answer 33

這就是我為重用OnClickListener

  public class TestAdapter extends RecyclerView.Adapter<TestAdapter.MyviewHolder>
                                         implements View.OnClickListener

在 ViewHoder 中取 itemlayout 的父級

  public class MyviewHolder extends RecyclerView.ViewHolder {

       LinearLayout linearLayout_item;

        public MyviewHolder(View itemView) {
            super(itemView);
            linearLayout_item=itemView.findViewById(R.id.linearLayout_item);
        }
    }

在 onBindViewHolder 中將標簽設置為位置

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

       holder.linearLayout_item.setTag(position);
       holder.linearLayout_item.setOnClickListener(this);
    }

並在 Onclick

 @Override
public void onClick(View v) {

    int position = (int) v.getTag();
    switch (v.getId()) {
        case R.id.linearLayout_item:

            // do some thing with position 

            break;
    }
}

Answer 34

在Kotlin中使用構造函數實現

初始化您的Recyclerview構造函數，如下所示

class ListAdapter(
c: Context,
private var list: List<Project>,
private val itemClick: (Project) -> Unit
) : RecyclerView.Adapter<ListAdapter.ViewHolder>() 

在您的onCreateViewHolder中返回itemClick

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int):ProjectViewHolder {
    val view = inflater.inflate(R.layout.list_item, parent, false)
    return ViewHolder(view, itemClick)
}

您的onBindViewHolder

override fun onBindViewHolder(holder: ViewHolder, position: Int) {
    holder.bindProject(list[position])
}

然后用viewHolder類創建bindProject函數。

class ViewHolder(
    view: View,
    private val itemClick: (Project) -> Unit
) : RecyclerView.ViewHolder(view) {

    private val clientTextCount = 7

    val titleTextView: TextView = view.projectTitleTextView

    fun bindProject(project: Project) {
        with(project) {
            titleTextView.text = name
            itemView.setOnClickListener { itemClick(this) }
        }
    }
}

最后在您的活動中使用惰性初始化適配器

private val adapter: ListAdapter by lazy {
    ListAdapter(this, projectList, {
        // Here you can implement your onClick function.
    })
}

要向recyclerview添加新列表，請在適配器中初始化以下方法

fun setProjects(projects: List<Project>) {
        projectList = projects
        notifyDataSetChanged()
    }

並在活動中的任何地方調用setProjects方法。

adapter.setProjects(projects)

而已。

Answer 35

在您的適配器類中添加一個接口。

public interface SelectedUser{

    void selectedUser(UserModel userModel);

}

在 mainactivity 中實現您的界面並覆蓋 selectedUser 方法。

@Override
public void selectedUser(UserModel userModel) {

    startActivity(new Intent(MainActivity.this, SelectedUserActivity.class).putExtra("data",userModel));

}

完整教程在這里查看加上源代碼。 Recyclerview 與 clicklistener 和 searchview

Answer 36

Step 1 ) 編寫點擊界面

創建一個名為RecyclerViewClickListener.java的接口並添加以下代碼。 這里我們聲明了兩個方法onClick和onLongClick，分別用來識別item點擊和長按。

package com.androidtutorialshub.recyclerviewtutorial.Helper;

import android.view.View;

public interface RecyclerViewClickListener {
    void onClick(View view, int position);

    void onLongClick(View view, int position);
}

步驟 2 ) 編寫 Item Touch 類

創建一個名為RecyclerViewTouchListener.java的類並添加以下代碼。 在這里，我們編寫了檢測點擊和長按回收站視圖項目的邏輯。

package com.androidtutorialshub.recyclerviewtutorial.Helper;

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;


public class RecyclerViewTouchListener implements RecyclerView.OnItemTouchListener{

    private GestureDetector gestureDetector;
    private RecyclerViewClickListener clickListener;

    public RecyclerViewTouchListener(Context context, final RecyclerView recyclerView, final RecyclerViewClickListener clickListener) {
        this.clickListener = clickListener;
        gestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
            @Override
            public boolean onSingleTapUp(MotionEvent e) {
                return true;
            }

            @Override
            public void onLongPress(MotionEvent e) {
                View child = recyclerView.findChildViewUnder(e.getX(), e.getY());
                if (child != null && clickListener != null) {
                    clickListener.onLongClick(child, recyclerView.getChildPosition(child));
                }
            }
        });
    }

    @Override
    public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {

        View child = rv.findChildViewUnder(e.getX(), e.getY());
        if (child != null && clickListener != null && gestureDetector.onTouchEvent(e)) {
            clickListener.onClick(child, rv.getChildPosition(child));
        }
        return false;
    }

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

    @Override
    public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {

    }
}

步驟 3 ) 定義點擊監聽器

打開MainActivity.java並更新以下更改。 這里 onClick() 方法將檢測對項目的點擊，onLongClick 將檢測對項目的長按。

recyclerView.addOnItemTouchListener(new RecyclerViewTouchListener(getApplicationContext(), recyclerView, new RecyclerViewClickListener() {
            @Override
            public void onClick(View view, int position) {
                Toast.makeText(getApplicationContext(), bookList.get(position).getTitle() + " is clicked!", Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onLongClick(View view, int position) {
                Toast.makeText(getApplicationContext(), bookList.get(position).getTitle() + " is long pressed!", Toast.LENGTH_SHORT).show();

            }
        }));

有關更多信息或下載源代碼：- http://www.androidtutorialshub.com/android-recyclerview-click-listener-tutorial/

Answer 37

試試這個，很簡單。 這個對我有用。 順便說一句，我發現setOnClickListener對RecyclerView沒有生效。

recycler.setOnTouchListener(new OnTouchListener() {
    @Override
    public boolean onTouch(View v, MotionEvent event) {
        if (event.getAction() == MotionEvent.ACTION_UP) {
            // anything todo
        }

        return true;
    }
});

Answer 38

對於 kotlin handle，請單擊基於 Jacobs anser 的 recyclerview anser

kotlin RecyclerViewClick #RecyclerViewClick # 科特林

1) 創建類 RecyclerItemClickListener

class RecyclerItemClickListener(context: Context, recyclerView: RecyclerView, listner: OnItemClickListener) : RecyclerView.OnItemTouchListener {
    var mGestureDetector: GestureDetector
    var mListner: OnItemClickListener
    interface OnItemClickListener {
        fun onItemClick(view: View, position: Int)
        fun onLongItemClick(view: View, position: Int)
    }
    init {
        this.mListner = listner
        mGestureDetector = GestureDetector(context, object : GestureDetector.SimpleOnGestureListener() {
            override fun onSingleTapUp(e: MotionEvent?): Boolean {
                return true
            }
            override fun onLongPress(e: MotionEvent?) {
                val child: View? = recyclerView.findChildViewUnder(e!!.getX(), e.getY())
                if (child != null && mListner != null) {
                    mListner.onLongItemClick(child, recyclerView.getChildAdapterPosition(child))
                }

            }

        })
    }
    override fun onTouchEvent(rv: RecyclerView, e: MotionEvent) {
    }

    override fun onInterceptTouchEvent(view: RecyclerView, e: MotionEvent): Boolean {
        val childView: View? = view.findChildViewUnder(e!!.getX(), e.getY())
        if (childView != null && mListner != null && mGestureDetector.onTouchEvent(e)) {
            mListner.onItemClick(childView, view.getChildAdapterPosition(childView))
            return true
        }
        return false
    }

    override fun onRequestDisallowInterceptTouchEvent(disallowIntercept: Boolean) {
    }

}

2）點擊任何Recyclerview（活動/片段）

 recyclerView.addOnItemTouchListener(
            RecyclerItemClickListener(
                this, recyclerView, object : RecyclerItemClickListener.OnItemClickListener {
                    override fun onItemClick(view: View, position: Int) {

                    }

                    override fun onLongItemClick(view: View, position: Int) {
                    }
                })
        )

Answer 39

將類標記為抽象類並實現 OnClick 方法

public abstract class MainGridAdapter extends
    RecyclerView.Adapter<MainGridAdapter.ViewHolder> {
private List<MainListItem> mDataset;

// Provide a reference to the views for each data item
// Complex data items may need more than one view per item, and
// you provide access to all the views for a data item in a view holder
public class ViewHolder extends RecyclerView.ViewHolder {
    // each data item is just a string in this case
    public TextView txtHeader;
    public TextView txtFooter;

    public ViewHolder(View v) {
        super(v);
        txtHeader = (TextView) v.findViewById(R.id.firstLine);
        txtFooter = (TextView) v.findViewById(R.id.secondLine);
    }
}

public void add(int position, MainListItem item) {
    mDataset.add(position, item);
    notifyItemInserted(position);
}

public void remove(MainListItem item) {
    int position = mDataset.indexOf(item);
    mDataset.remove(position);
    notifyItemRemoved(position);
}

// Provide a suitable constructor (depends on the kind of dataset)
public MainGridAdapter(List<MainListItem> myDataset) {
    mDataset = myDataset;
}

// Create new views (invoked by the layout manager)
@Override
public MainGridAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
        int viewType) {
    // create a new view
    View v = LayoutInflater.from(parent.getContext()).inflate(
            R.layout.list_item_grid_line, parent, false);
    // set the view's size, margins, paddings and layout parameters
    ViewHolder vh = new ViewHolder(v);
    return vh;
}

// Replace the contents of a view (invoked by the layout manager)
@Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
    // - get element from your dataset at this position
    // - replace the contents of the view with that element     
    OnClickListener clickListener = new OnClickListener() {
        @Override
        public void onClick(View v) {
            onItemClicked(position);
        }
    };
    holder.itemView.setOnClickListener(clickListener);
    holder.txtHeader.setOnClickListener(clickListener);
    holder.txtFooter.setOnClickListener(clickListener);
    final MainListItem item = mDataset.get(position);
    holder.txtHeader.setText(item.getTitle());
    if (TextUtils.isEmpty(item.getDescription())) {
        holder.txtFooter.setVisibility(View.GONE);
    } else {
        holder.txtFooter.setVisibility(View.VISIBLE);
        holder.txtFooter.setText(item.getDescription());
    }
}

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

public abstract void onItemClicked(int position);

}

在綁定事件中實現點擊處理程序以僅具有一個事件實現

這個的實現：

mAdapter = new MainGridAdapter(listItems) {         
    @Override
    public void onItemClicked(int position) {
        showToast("Item Clicked: " + position, ToastPlus.STYLE_INFO);
    }
};

長按也可以這樣做

Answer 40

這是我的代碼片段

v.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) 
        {
            int newposition = MainActivity.mRecyclerView.getChildAdapterPosition(v);
            Intent cardViewIntent = new Intent(c, in.itechvalley.cardviewexample.MainActivityCards.class);
            cardViewIntent.putExtra("Position", newposition);
            c.startActivity(cardViewIntent);
        }
    });

v是來自onCreateViewHolder的視圖

c是語境

Answer 41

這是一個策略，它給出了類似於ListView實現的結果，因為您可以在Activity或Fragment級別而不是Adapter或ViewHolder級別定義偵聽器。 它還定義了一些抽象類，用於處理適配器和支架的大量樣板工作。

抽象類

首先，定義一個擴展RecyclerView.ViewHolder的抽象Holder並定義一個通用數據類型T ，用於將數據綁定到視圖。 bindViews方法將由子類實現以將數據映射到視圖。

public abstract class Holder<T> extends RecyclerView.ViewHolder {
    T data;

    public Holder(View itemView) {
        super(itemView);
    }

    public void bindData(T data){
        this.data = data;
        bindViews(data);
    }

    abstract protected void bindViews(T data);
}

此外，創建一個擴展RecyclerView.Adapter<Holder<T>>的抽象Adapter 。 這定義了 3 個接口方法中的 2 個，子類將需要實現最后一個onViewHolderCreated方法。

public abstract class Adapter<T> extends RecyclerView.Adapter<Holder<T>> {
    List<T> list = new ArrayList<>();

    @Override
    public void onBindViewHolder(Holder<T> holder, int position) {
        holder.bindData(list.get(position));
    }

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

    public T getItem(int adapterPosition){
        return list.get(adapterPosition);
    }
}

---

具體類

現在創建一個擴展Holder的新具體類。 此方法只需定義視圖並處理綁定。 我在這里使用ButterKnife 庫，但可以隨意使用 itemView.findViewById itemView.findViewById(...)方法。

public class PersonHolder extends Holder<Person>{
    @Bind(R.id.firstname) TextView firstname;
    @Bind(R.id.lastname) TextView lastname;

    public PersonHolder(View view){
        super(view);
        ButterKnife.bind(this, view);
    }

    @Override
    protected void bindViews(Person person) {
        firstname.setText(person.firstname);
        lastname.setText(person.lastname);
    }
}

最后，在包含RecyclerView的Activity或Fragment類中，您將擁有以下代碼：

// Create adapter, this happens in parent Activity or Fragment of RecyclerView
adapter = new Adapter<Person>(){
    @Override
    public PersonHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(parent.getContext())
                    .inflate(R.layout.layout_person_view, parent, false);

        PersonHolder holder = new PersonHolder(v);
        v.setOnClickListener(new OnClickListener(){
            @Override
            public void onClick(View v) {
                int itemPos = holder.getAdapterPosition();
                Person person = getItem(itemPos);

                // do something with person
                EventBus.getDefault().postSticky(new PersonClickedEvent(itemPos, person));
            }
        });

        return holder;
    }
};

Answer 42

很簡單，添加這個類：

public class OnItemClickListener implements View.OnClickListener {
    private int position;
    private OnItemClickCallback onItemClickCallback;

    public OnItemClickListener(int position, OnItemClickCallback onItemClickCallback) {
        this.position = position;
        this.onItemClickCallback = onItemClickCallback;
    }

    @Override
    public void onClick(View view) {
        onItemClickCallback.onItemClicked(view, position);
    }

    public interface OnItemClickCallback {
        void onItemClicked(View view, int position);
    }
}

獲取“OnItemClickCallback”接口的實例並將其放入您的活動或片段中：

private OnItemClickListener.OnItemClickCallback onItemClickCallback = new OnItemClickListener.OnItemClickCallback() {
    @Override
    public void onItemClicked(View view, int position) {
    }
};

然后，將該回調傳遞給您的 recyclerView：

recyclerView.setAdapter(new SimpleStringRecyclerViewAdapter(Arrays.asList("1", "2", "3"), onItemClickCallback));

最后，這將是您的適配器：

public class SimpleStringRecyclerViewAdapter extends RecyclerView.Adapter<SimpleStringRecyclerViewAdapter.ViewHolder> {
    private List<String> mValues;
    private OnItemClickListener.OnItemClickCallback onItemClickCallback;

    public SimpleStringRecyclerViewAdapter(List<String> items, OnItemClickListener.OnItemClickCallback onItemClickCallback) {
        mValues = items;
        this.onItemClickCallback = onItemClickCallback;
    }

    public static class ViewHolder extends RecyclerView.ViewHolder {
        public final TextView mTextView;

        public ViewHolder(View view) {
            super(view);
            mTextView = (TextView) view.findViewById(R.id.txt_title);
        }
    }

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

    @Override
    public void onBindViewHolder(final ViewHolder holder, final int position) {
        holder.mTextView.setText(mValues.get(position));
        holder.mTextView.setOnClickListener(new OnItemClickListener(position, onItemClickCallback));
    }

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

Answer 43

通常您的CardView中有多個元素，因此您需要一個布局視圖來包裝和組織它們。
您可以將OnClickListener添加到該布局視圖。
1. 為您的布局添加一個 id。 在這種情況下，一個LinearLayout

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

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/card_view_linearLayout">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="name"
            android:id="@+id/card_view_name" />

        ...

    </LinearLayout>

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

$ 2. 在你的內部ViewHolder類中獲取布局視圖。

public static class ViewHolder extends RecyclerView.ViewHolder{
    private TextView nameView;
    ...
    private LinearLayout linearLayout;
    public ViewHolder(View itemView) {
        super(itemView);
        nameView = (TextView)itemView.findViewById(R.id.card_view_name);
        ...
        linearLayout = (LinearLayout)itemView.findViewById(R.id.card_view_linearLayout);
    }
}

$ 3. 在onBindViewHolder中將偵聽器添加到您的布局，並使用回調將數據發送到Activity或Fragment （未測試）。

@Override
public void onBindViewHolder(TrackAdapter.ViewHolder holder, final int position) {
    String str = mStringList.get(position);

    holder.nameView.setText(str);
    ...
    holder.linearLayout.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            callback.itemCallback(mStringList.get(position));
        }
    });
}

如何使用回調是另一回事

Answer 44

Kotlin 中的相同答案

inner class MyViewHolder(v: View, myOnClickListener: MyOnClickListener) : RecyclerView.ViewHolder(v) {
    init {
        v.setOnClickListener { v -> myOnClickListener.onClick(v, adapterPosition) }
    }
}

override fun onCreateViewHolder(viewGroup: ViewGroup, viewType: Int): MyViewHolder {
    val view = LayoutInflater.from(viewGroup.context).inflate(R.layout.myview, viewGroup, false)
    return MyViewHolder(view, mOnClickListener)
}

inner class MyOnClickListener {
    fun onClick(view: View, position: Int) {
        val item = mList[position]
        Toast.makeText(view.context, item, Toast.LENGTH_LONG).show()
    }
}

Answer 45

我已經仔細閱讀了所有的答案，但並不十分滿意。 我找到了更簡單快捷的解決方案。 想分享給未來的讀者。

1. 選擇單個回收器項目中的任何View 。
2. 獲取此View的父級（確保您投射到適當的ViewGroup ）
3. 將您的onClickListener設置為此父母。

示例代碼（寫在adapter的onBindViewHolder方法中）：

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

    ConstraintLayout parent = (ConstraintLayout) holder.title.getParent();
    parent.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(context, "Clicked recycler view item at position " + position, Toast.LENGTH_SHORT).show();
        }
    });
}

Answer 46

讓我們看看如何使用 Jetpack / AndroidX 實現這一點

您需要像這樣在viewmodel類中創建一個可觀察對象

private MutableLiveData<Integer> adapterItem = new MutableLiveData<>();

public MutableLiveData<Integer> getAdapterItem() {
    return adapterItem;
}

public void setAdapterItem(int adapterItem) {
    this.getAdapterItem().setValue(adapterItem);
}

然后在適配器類中確保將 viewmodel 引用作為構造函數中的參數傳遞，然后在 viewholder 上實現 clicklistener

    public MyViewHolder(@NonNull View itemView) {
        super(itemView);
        if(itemView != null){
            itemView.setOnClickListener(v -> {
                int adapterPosition = getAdapterPosition();
                viewModel.setAdapterItem(adapterPosition);
            });

        };
    }

然后從活動類中觀察變化

    viewModel.getAdapterItem().observe(this, position -> {
        Log.w(TAG, "clicked: " + ridesArray.get(position));
    });

Answer 47

這是我的方式

在活動課上：

    public class MyActivity extends AppCompatActivity implements EmployeeAdapter.ClickListener {
    ...
    @Override
    public void onClick(int position) { ... }
    ...
    }

在適配器類中：

    public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
    ...
    @Override
    public void onBindViewHolder(){
         holder.textView1.setOnClickListener(v -> clickListener.onClick(position));
    }
    ...
    public interface ClickListener {
        void onClick(int position);
    }
    ...
    }

Answer 48

帶有 kotlin 的 Recyclerview 適配器

您可以在適配器中通過兩種方式實現項目點擊監聽器。

第一種方式是使用接口

在你的活動課上：

class YourActivity : AppCompatActivity(), TestAdapter.ClickListener {
...
override fun itemClicked() {

}
...
}

在您的適配器類中：

class MyAdapter : RecyclerView.Adapter<MyAdapter.MyViewHolder> {
...
override fun onBindViewHolder(holder: ViewHolder, position: Int) {
     holder.textView1.setOnClickListener { 
        clickListener.itemClicked(position) 
     }
}
...
interface ClickListener {
     fun itemClicked(position : Int)
}
...
}

第二種方法是使用回調調用

在您的適配器類中：

class MyAdapter(val callBack: (pos:Int) -> Unit) : RecyclerView.Adapter<MyAdapter.MyViewHolder> {
...
override fun onBindViewHolder(holder: ViewHolder, position: Int) {
     holder.textView1.setOnClickListener { 
        callBack(position)
     }
}
}

在你的活動課上：

class YourActivity : AppCompatActivity() {
...
val testAdapter = TestAdapter(
            callBack = { index ->
               
            })
binding.recyclerView.layoutManager = LinearLayoutManager(this)
binding.recyclerView.adapter = testAdapter
...
}

Answer 49

這行得通。

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

private final Context mContext;
private List<ServiceListModel> categoryList;
private View.OnClickListener onClickListener;

public ServiceListAdapter(Context mContext, List<ServiceListModel> categoryList, View.OnClickListener onClickListener) {
    this.categoryList = categoryList;
    this.mContext = mContext;
    this.onClickListener = onClickListener;
}

@Override
public ViewHolder onCreateViewHolder(final ViewGroup parent, final int viewType) {
    final LayoutInflater inflater = LayoutInflater.from(parent.getContext());
    final RowServiceListBinding binding = DataBindingUtil.inflate(inflater, R.layout.row_service_list, parent, false);
    return new ViewHolder(binding.getRoot(), binding);
}

@Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
    holder.binding.rlService.setOnClickListener(onClickListener);
    holder.binding.rlService.setTag(position);
}

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

public class ViewHolder extends RecyclerView.ViewHolder {
    private final RowServiceListBinding binding;

    public ViewHolder(final View view, final RowServiceListBinding binding) {
        super(view);
        this.binding = binding;
    }

    @UiThread
    public void bind(final ServiceListModel mAddressModel) {
        //this.binding.setAddress(mAddressModel);
    }
}
}

在活動/片段中使用

ServiceListAdapter adapter = new ServiceListAdapter(context, serviceList, new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            switch (v.getId()) {
                case R.id.rlService:
                    int pos = (int) v.getTag();
                    serviceList.remove(position);
                    break;
            }
        }
    });