单击recyclerview时未触发父单击事件

Question

我有一个 RecyclerView，它位于具有几个 TextView 的 CardView 中。 CardView 有一个OnClickListener 集，并在单击 TextViews 时触发，但在单击 RecyclerView 时不会触发。

这是 CardView 的样子：

<?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:id="@+id/card_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_margin="5dp"
    card_view:cardCornerRadius="4dp"
    card_view:cardElevation="5dp">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:weightSum="100"
        android:minWidth="100dp">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:id="@+id/text1"
            android:textColor="@color/abc_primary_text_material_light"
            android:layout_weight="1"
            android:layout_gravity="center_horizontal" />

        <android.support.v7.widget.RecyclerView
            android:id="@+id/recyclerView"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:listSelector="@color/highlighted_text_material_light"
            android:layout_weight="98" />

        <View
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:background="@android:color/black" />

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/relativeSummary"
            android:orientation="horizontal"
            android:layout_weight="1">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAppearance="?android:attr/textAppearanceLarge"
                android:id="@+id/text2"
                android:textAlignment="viewEnd"
                android:textColor="@color/abc_secondary_text_material_light"
                android:layout_marginLeft="5dp"
                android:layout_marginRight="5dp"
                android:gravity="start"
                android:singleLine="true"
                android:layout_alignParentLeft="true" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAppearance="?android:attr/textAppearanceLarge"
                android:id="@+id/text3"
                android:textColor="@color/abc_primary_text_material_light"
                android:layout_marginRight="5dp"
                android:layout_marginLeft="5dp"
                android:gravity="end"
                android:singleLine="true"
                android:layout_alignParentRight="true"
                android:layout_toRightOf="@+id/text2" />

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

我不需要此 RecyclerView 上的单击侦听器，实际上只需要在单击 RecyclerView 时触发父视图的单击事件（OnLongClick 事件也是如此）。我还需要 RecyclerView 来滚动。 RecyclerView 是如何吃点击事件而不将其传递给父级的吗？

Answer 1

有一个更好的解决方案。也就是说，将您的CardView 子类化：

public class InterceptTouchCardView extends CardView {

    public InterceptTouchCardView(Context context) {
        super(context);
    }

    public InterceptTouchCardView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public InterceptTouchCardView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    /**
     * Intercept touch event so that inner views cannot receive it.
     * 
     * If a ViewGroup contains a RecyclerView and has an OnTouchListener or something like that,
     * touch events will be directly delivered to inner RecyclerView and handled by it. As a result, 
     * parent ViewGroup won't receive the touch event any longer.
     */
    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        return true;
    }
}

Answer 2

recyclerView.setLayoutFrozen(true);

在 setAdapter for recyclerView 之后只 setLayoutFrozen true

Answer 3

就我而言，我有一个带有几个按钮的 CardView 和一个 RecyclerView。使用ywwynm 和Daryl 的解决方案，问题在于 CardView 会拦截来自其所有子视图的事件，包括按钮。但我想要的是 CardView 只拦截 RecyclerView 的触摸事件。我的解决方案如下：

public class UntouchableRecyclerView extends RecyclerView {

    public UntouchableRecyclerView(Context context) {
        super(context);
    }

    public UntouchableRecyclerView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public UntouchableRecyclerView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    public boolean onTouchEvent(MotionEvent e) {
        return false;
    }
}

Answer 4

我想出了如何将点击事件传递给 RecyclerView 的父级。我的解决方案有点像 hack，所以我希望有人能提出更好的解决方案。

在 RecylerView.Adapter 中：

@Override
public ViewHolder onCreateViewHolder(final ViewGroup viewGroup, int i) {
    View view = LayoutInflater.from(viewGroup.getContext())
            .inflate(R.layout.my_item_layout, viewGroup, false);

    ViewHolder viewHolder = new ViewHolder(view);

    viewHolder.itemView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            viewGroup.callOnClick();
        }
    });
    viewHolder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
        @Override
        public boolean onLongClick(View v) {
            return viewGroup.performLongClick();
        }
    });

    return viewHolder;
}

然后我不得不在 RecyclerView 上连接点击事件：

RecyclerView.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        parentView.callOnClick();
    }
});
RecyclerView.setOnLongClickListener(new View.OnLongClickListener() {
    @Override
    public boolean onLongClick(View v) {
        return parentView.performLongClick();
    }
});

Answer 5

@ywwynm，除了解决方案不允许嵌套的 RecyclerView 滚动之外，您在正确的轨道上。我将它与解决方案 here 结合起来，并提出了这个解决方案来处理点击和 onLongClick 事件以及允许滚动。

public class InterceptTouchCardView extends CardView {
    private GestureDetector mGestureDetector;
    private boolean mLongClicked;

    public InterceptTouchCardView(Context context) {
        super(context);
        Initialize();
    }

    public InterceptTouchCardView(Context context, AttributeSet attrs) {
        super(context, attrs);
        Initialize();
    }

    public InterceptTouchCardView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        Initialize();
    }

    private void Initialize() {
        mGestureDetector = new GestureDetector(getContext(),
                new GestureDetector.SimpleOnGestureListener() {
                    public boolean onDown(MotionEvent e) {
                        mLongClicked = false;
                        return true;
                    }

                    public void onLongPress(MotionEvent e) {
                        mLongClicked = true;
                        performLongClick();
                    }
                });
    }

    /**
     * Intercept touch event so that inner views cannot receive it.
     *
     * If a ViewGroup contains a RecyclerView and has an OnTouchListener or something like that,
     * touch events will be directly delivered to inner RecyclerView and handled by it. As a result,
     * parent ViewGroup won't receive the touch event any longer.
     *
     * We can't Intercept the touch event if we want to allow scrolling since ACTION_DOWN always
     * happens before ACTION_MOVE.  So handle touch events here since onTouchEvent won't be triggered.
     */
    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        mGestureDetector.onTouchEvent(ev);
        if (ev.getAction() == MotionEvent.ACTION_UP && !mLongClicked)
            this.callOnClick();
        return false;
    }
}