将Android NestedScrollView水平滑动传递给父视图

Question

我正在尝试制作一个左右可刷卡系统(如Tinder),卡上有一个NestedScrollView.目标是如果用户仅向上和向下滑动,NestedScrollView将滚动,但如果用户向左或向右滑动,则卡将使用该滑动.

<?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="4dp"
    card_view:cardUseCompatPadding="true">

    <android.support.v4.widget.NestedScrollView
        android:id="@+id/nested_scroll_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            android:padding="4dp">

            <TextView
                android:id="@+id/text_view"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" />

            <android.support.v7.widget.RecyclerView
                android:id="@+id/recycler"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" />

        </LinearLayout>

    </android.support.v4.widget.NestedScrollView>

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

(我使用的卡库是https://github.com/wenchaojiang/AndroidSwipeableCardStack)

compile 'com.github.wenchaojiang:AndroidSwipeableCardStack:0.1.5'

当我在NestedScrollView上放置margin_top并在该边距内触摸时,CardStack正确地抓取我的输入并且卡片向左或向右移动,但是如果我触摸并拖动其他任何地方,NestedScrollView会抓住我的输入而不管方向.

我应该扩展/覆盖哪个类/ onTouchEvent以产生这种效果,或者可能有更简单的方法？

谢谢!

Answer 1

是的，您应该通过在 Java 代码上实现 CardStack.CardEventListener 并将其设置为侦听器 mCardStack.setListener(yourListener) 来完成此操作；它位于项目内部的自述文件中。尝试这个：

Class YourListener extends CardStack.CardEventListener{
    //implement card event interface
    @Override
    public boolean swipeEnd(int direction, float distance) {
        //if "return true" the dismiss animation will be triggered 
        //if false, the card will move back to stack
        //distance is finger swipe distance in dp


        return (distance>300)? true : false;
    }

    @Override
    public boolean swipeStart(int direction, float distance) {

        return true;
    }

    @Override
    public boolean swipeContinue(int direction, float distanceX, float distanceY) {

        return true;
    }

    @Override
    public void discarded(int id, int direction) {
       //this callback invoked when dismiss animation is finished. 
    }

    @Override
    public void topCardTapped() {
         //this callback invoked when a top card is tapped by user. 
    }
}