我尝试做这样的事情:

我设法完成我的 cardViewAdapter，但我阻止放大我的卡片。我恢复了这个 response 的代码(这里类的名称是:CardsAnimationHelper)做动画但是它是叠加的。

展开前: 展开后:

我解决了上面的问题，但是如果在我的 cardView 上我同时显示 10 个元素以显示 50 个列表。如果我展开第一个，数字 11、21、31、41 也会展开。你有什么技巧可以避免这种情况发生吗？

我已经反射(reflect)了，这对我来说没有意义。就在我的 OnClick 方法之前，我显示一个 TextView ，其中文本是位置。但是当我点击时 id 是正确的，这意味着当我点击它时它会检测到对几张卡片的点击。我想我的 OnClickListener 中的 View 可能有问题

我的卡片 View

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout 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="wrap_content">

    <android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="5dp"

        app:cardBackgroundColor="@android:color/white"
        app:cardCornerRadius="2dp"
        app:cardElevation="2dp">

        <!-- Les CardView possèdent des attributs supplémentaires dont
             - cardBackgroundColor
             - cardElevation pour l'élévation (donc aussi l'ombre)
             - cardCornerRadius pour arrondir les angles
         -->

        <android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:app="http://schemas.android.com/apk/res-auto"
            xmlns:tools="http://schemas.android.com/tools"
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <!-- Les CardView agissent comme des FrameLayout,
             pour avoir une organisation verticale nous devons
             donc rajouter un LinearLayout -->


            <TextView
                android:id="@+id/text_cards"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="?android:selectableItemBackground"
                android:padding="20dp"
                tools:text="Paris"
                android:fontFamily="sans-serif"
                android:textColor="#333"
                android:textSize="18sp" />

            <ImageView
                android:id="@+id/item_description_game_more"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_vertical|end"
                android:transitionName="@string/transition_cards_view"
                app:srcCompat="@drawable/ic_expand_more_black_24dp"/>

            <include layout="@layout/cards_resume_game_expand"/>

        </android.support.design.widget.CoordinatorLayout>

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

</LinearLayout>

我的新适配器

public class CardsViewAdapter extends RecyclerView.Adapter<CardsViewAdapter.ViewHolder> {
    private Game[] mDataset;
    private boolean isPopupVisible = false;
    int rotationAngle = 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 TextView mTextView;
        public ImageView imageView;
        public LinearLayout test2;

        public ViewHolder(View v) {
            super(v);
            mTextView = (TextView) v.findViewById(R.id.text_cards);
            imageView = (ImageView) v.findViewById(R.id.item_description_game_more);
            test2 = (LinearLayout) v.findViewById(R.id.popup_layout);

        }
    }

    // Provide a suitable constructor (depends on the kind of dataset)
    public CardsViewAdapter(Game[] myDataset) {
        mDataset = myDataset;
    }

    // Create new views (invoked by the layout manager)
    @Override
    public CardsViewAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
                                                   int viewType) {
        // create a new view
        View v = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.cards_resume_game, 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, int position) {
        // - get element from your dataset at this position
        // - replace the contents of the view with that element

        holder.mTextView.setText(String.valueOf(mDataset[position].getId_game()));
        holder.imageView.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                // Perform action on click
                if (isPopupVisible) {
                    isPopupVisible = false;

                    ObjectAnimator anim = ObjectAnimator.ofFloat(v, "rotation",rotationAngle, rotationAngle + 180);
                    anim.setDuration(500);
                    anim.start();
                    rotationAngle += 180;
                    rotationAngle = rotationAngle%360;

//                    CardsAnimationHelper.changeIconAnim((TextView) v, getString(R.string.icon_chevron_up));
                    CardsAnimationHelper.collapse(holder.test2);
                } else {
                    isPopupVisible = true;

                    ObjectAnimator anim = ObjectAnimator.ofFloat(v, "rotation",rotationAngle, rotationAngle + 180);
                    anim.setDuration(500);
                    anim.start();
                    rotationAngle += 180;
                    rotationAngle = rotationAngle%360;

//                    CardsAnimationHelper.changeIconAnim((TextView) v, getString(R.string.icon_chevron_down));
                    CardsAnimationHelper.expand(holder.test2);
                }
            }
        });



    }

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

最佳答案

我不明白你说的显示 50 个元素中的 10 个是什么意思。但是，你可以简单地通过显示/隐藏 View 并提供 android:animateLayoutChanges="true" 来实现展开/折叠进入 CardView 的子布局。这是一个例子:

<android.support.v7.widget.CardView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:animateLayoutChanges="true"
        android:padding="16dp"
        android:orientation="vertical">

        <TextView
            android:id="@+id/hello"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Hello World!"/>

        <TextView
            android:id="@+id/hello2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Hello World!"
            android:visibility="gone"/>

        <TextView
            android:id="@+id/hello3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Hello World!"
            android:visibility="gone"/>

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

和相应的 Controller :

    TextView t1 = (TextView) findViewById(R.id.hello);
    final TextView t2 = (TextView) findViewById(R.id.hello2);
    final TextView t3 = (TextView) findViewById(R.id.hello3);

    t1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            if (t2.getVisibility() == View.GONE) {
                t2.setVisibility(View.VISIBLE);
                t3.setVisibility(View.VISIBLE);
            } else {
                t2.setVisibility(View.GONE);
                t3.setVisibility(View.GONE);
            }
        }
    });

点击第一个 TextView 将随着动画折叠和展开 CardView。

关于android - CardView 中的展开/折叠动画，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/41464629/