在RecyclerView中滑动和OnClick事件

Question

我试图在RecyclerView中实现一个swipe来解除操作，但当我在ViewHolder中的任何视图上设置OnClickListener时，它将覆盖该视图上的所有OnTouch事件。

我可以放弃OnClickListener而在TouchListener中处理所有单击，但如果在RecycleView的子视图中有多个按钮，那么将会有大量代码，这看起来不是一个正确的方法。

在我的RecyleView中，我将Swipe设置为Discount侦听器（与此类似）：

    setOnTouchListener(touchListener);
    setOnScrollListener(touchListener.makeScrollListener());

它在ListView中工作，但在RecycleView中，OnClickListener阻止OnTouchListner事件。

ViewWholder视图的布局示例。

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/card_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="72dp"
android:descendantFocusability="blocksDescendants">

<ImageView
    android:id="@+id/keep_icon"
    android:layout_width="48dp"
    android:layout_height="48dp"
    android:layout_centerInParent="true"
    android:src="@drawable/ic_received" />

在RecyclerView.Adapter中充气：

@Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
    View v = mInflater.inflate(R.layout.push_card_view_compat, viewGroup, false);
    return new ViewHolder(v, onClickListener, onKeepListener);
}

观众：

public ViewHolder(final View itemView,
                  final OnViewHolderClickListener onClickListener,
                  final OnKeepListener onKeepListener) {
    super(itemView);
    keepButton = (ImageView) itemView.findViewById(R.id.keep_icon);

    itemView.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        onItemClickListener.onClick(getPosition(), itemView);
    }
    });
    keepButton.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        onKeepListener.onClick(getPosition(), itemView);
    }
    });
}

Answer 1

我通过为viewholder中的按钮分配onclicklistener并为touch事件创建一个接口来实现这一点。

示例项目位于GitHub：https://github.com/brnunes/SwipeableRecyclerView上。

在我的示例中，每个项都是一个带有两个按钮的CardView，我希望检测CardView和按钮中的触摸事件。CardView布局如下所示：

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_margin="5dp"
    android:clickable="true"
    android:foreground="?android:attr/selectableItemBackground"
    android:orientation="vertical"
    card_view:cardCornerRadius="5dp">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <TextView
            android:id="@+id/card_view_title"
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:layout_alignParentTop="true"
            android:layout_centerHorizontal="true"
            android:gravity="center"
            android:textColor="@android:color/black"
            android:textSize="24sp" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_below="@id/card_view_title"
            android:layout_centerHorizontal="true"
            android:gravity="center">

            <Button
                android:id="@+id/card_view_button1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Button1" />

            <Button
                android:id="@+id/card_view_button2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Button2" />
        </LinearLayout>
    </RelativeLayout>

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

然后，在activity中，我声明了一个接收触摸事件的接口：

public interface OnItemTouchListener {
    public void onCardViewTap(View view, int position);
    public void onButton1Click(View view, int position);
    public void onButton2Click(View view, int position);
}

在ViewHolder中，我将OnClickListeners分配给我要侦听的对象，并调用我的自定义侦听器：

public class CardViewAdapter extends RecyclerView.Adapter<CardViewAdapter.ViewHolder> {
    private List<String> cards;
    private OnItemTouchListener onItemTouchListener;

    public CardViewAdapter(List<String> cards, OnItemTouchListener onItemTouchListener) {
        this.cards = cards;
        this.onItemTouchListener = onItemTouchListener;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
        View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.card_view_layout, viewGroup, false);
        return new ViewHolder(v);
    }

    @Override
    public void onBindViewHolder(ViewHolder viewHolder, int i) {
        viewHolder.title.setText(cards.get(i));
    }

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

    public class ViewHolder extends RecyclerView.ViewHolder {
        private TextView title;
        private Button button1;
        private Button button2;

        public ViewHolder(View itemView) {
            super(itemView);
            title = (TextView) itemView.findViewById(R.id.card_view_title);
            button1 = (Button) itemView.findViewById(R.id.card_view_button1);
            button2 = (Button) itemView.findViewById(R.id.card_view_button2);

            button1.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    onItemTouchListener.onButton1Click(v, getPosition());
                }
            });

            button2.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    onItemTouchListener.onButton2Click(v, getPosition());
                }
            });

            itemView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    onItemTouchListener.onCardViewTap(v, getPosition());
                }
            });
        }
    }
}

最后，实例化自定义OnItemTouchListener并将其传递给CardViewAdapter构造函数：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    mItems = new ArrayList<>(30);
    for (int i = 0; i < 30; i++) {
        mItems.add(String.format("Card number %2d", i));
    }

    OnItemTouchListener itemTouchListener = new OnItemTouchListener() {
        @Override
        public void onCardViewTap(View view, int position) {
            Toast.makeText(MainActivity.this, "Tapped " + mItems.get(position), Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onButton1Click(View view, int position) {
            Toast.makeText(MainActivity.this, "Clicked Button1 in " + mItems.get(position), Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onButton2Click(View view, int position) {
            Toast.makeText(MainActivity.this, "Clicked Button2 in " + mItems.get(position), Toast.LENGTH_SHORT).show();
        }
    };

    mAdapter = new CardViewAdapter(mItems, itemTouchListener);

    mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);

    mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
    mRecyclerView.setAdapter(mAdapter);

    // ... Assign the swipe listener
}