android - 如何在 Android CardView 上添加滑动功能？

Question

我有一个 CardView，其中包含两个 TextView 和两个 ImageView。我希望能够左右滑动以“关闭”。我实际上想向右滑动以发送 Intent，但这可以稍后完成。现在，我希望能够通过向左或向右滑动来关闭 CardView。我也想要滑动的动画。

我尝试使用 romannurik's SwipeDismissTouchListener但 CardView 不响应滑动。

如果有人有比romannurik 的 自定义监听器更好的解决方案，请分享。

这是我的 CardView 布局:

<android.support.v7.widget.CardView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/generate"
    map:cardCornerRadius="@dimen/_3sdp"
    map:cardElevation="@dimen/_8sdp"
    android:id="@+id/restaurantContainer">

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical">

        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:orientation="horizontal">

            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:orientation="vertical">

                <ImageView
                    android:id="@+id/thumbnail"
                    android:layout_width="@dimen/_75sdp"
                    android:layout_height="@dimen/_75sdp"
                    android:layout_margin="@dimen/_5sdp" />

                <ImageView
                    android:id="@+id/rating"
                    android:layout_width="@dimen/_75sdp"
                    android:layout_height="@dimen/_15sdp"
                    android:layout_margin="@dimen/_5sdp" />
            </LinearLayout>

            <LinearLayout
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:orientation="vertical">

                <TextView
                    android:id="@+id/name"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:layout_margin="@dimen/_5sdp"
                    android:gravity="top"
                    android:textAppearance="?android:attr/textAppearanceLarge" />

                <TextView
                    android:id="@+id/categories"
                    android:layout_width="fill_parent"
                    android:layout_height="fill_parent"
                    android:layout_margin="@dimen/_5sdp"
                    android:textAppearance="?android:attr/textAppearanceMedium" />
            </LinearLayout>

        </LinearLayout>

        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="fill_parent">

            <com.google.android.gms.maps.MapView
                android:id="@+id/mapView"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                map:cameraZoom="14"
                map:liteMode="true"
                map:mapType="normal" />

        </LinearLayout>

    </LinearLayout>

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

我如何设置 SwipeDismissTouchListener:

RelativeLayout rootLayout;
CardView restaurantCardView;

...

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        rootLayout = (RelativeLayout) inflater.inflate(R.layout.fragment_main, container, false);

        restaurantCardView = (CardView) rootLayout.findViewById(R.id.restaurantContainer);

        restaurantCardView.setOnTouchListener(new SwipeDismissTouchListener(restaurantCardView, null, new SwipeDismissTouchListener.DismissCallbacks() {
            @Override
            public boolean canDismiss(Object token) {
                Log.d("Chris", "canDismiss() called with: " + "token = [" + token + "]");
                return true;
            }

            @Override
            public void onDismiss(View view, Object token) {
                Log.d("Chris", "onDismiss() called with: " + "view = [" + view + "], token = [" + token + "]");
            }
        }));
    ....

    return rootLayout;

我可以从 canDismiss(...) 看到日志，但不能从 onDismiss(...) 看到日志。

Answer 1

你必须把它放在 RecyclerView 里面(你的 CardView 是那里唯一的项目)

然后，使用 ItemTouchHelper.SimpleCallback 到 itemTouchHelper.attachToRecyclerView(recyclerView);

它会给你动画和在

@Override
public void onSwiped(RecyclerView.ViewHolder viewHolder, int swipeDir) {
}

您可以根据滑动方向指定特定的 Action 。

请在此处查看完整说明:Swipe to Dismiss for RecyclerView

此外，您还必须在 RecyclerView 中禁用垂直滚动:

public class UnscrollableLinearLayoutManager extends LinearLayoutManager {
    public UnscrollableLinearLayoutManager(Context context) {
        super(context);
    }

    @Override
    public boolean canScrollVertically() {
        return false;
    }
}

.....

RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
recyclerView.setLayoutManager(new UnscrollableLinearLayoutManager(this));
recyclerView.setAdapter(new RestaurantCardAdapter());

否则 - 一旦您尝试向上或向下滚动 - 您会看到 RecyclerView 的列表结束动画。

更新:

这是我用于测试的RecyclerView.Adapter:

private class RestaurantCardAdapter extends RecyclerView.Adapter {
    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        return new RestaurantViewHolder(new RestaurantCard(parent.getContext()));
    }

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

    @Override
    public int getItemCount() {
        return 1;
    }

    private class RestaurantViewHolder extends RecyclerView.ViewHolder {
        public RestaurantViewHolder(View itemView) {
            super(itemView);
        }
    }
}

RestaurantCard - 只是一个自定义的 View(在我们的例子中扩展了 CardView):

public class RestaurantCard extends CardView {
    public RestaurantCard(Context context) {
        super(context);
        initialize(context);
    }

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

    private void initialize(Context context){
        LayoutInflater.from(context).inflate(R.layout.card, this);
        // ImageView imageView = (ImageView)getView.findViewById(...);
    }
}