Expand/collapse animation in CardView

Question

I try to do something like this :

I managed to do my cardViewAdapter but I block to enlarge my cards. I resumed the code of this response (Here the name of the class is : CardsAnimationHelper) to do the animation but it's superimposed.

Before expand: After expand:

I solved the problem above but if on my cardView I display 10 elements at the same time for a list of 50. If I expand the first, the numbers 11,21,31,41 will also expand. Do you have a trick for this not to happen?

I have reflected, it makes no sense to me. Just before my OnClick method I display a textview where the text is the position. But when I click id are correct so that would mean that when I click it detects the click on several cards. I think I may have a problem with a view in my OnClickListener

My CardView

<?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>

My New Adapter

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;
    }
}

Answer 1

I did not understand what you meant by displaying 10 elements out of 50. However, you can achieve the expand/collapse simply by showing/hiding the views and providing android:animateLayoutChanges="true" into the child layout of the CardView. Here is an example:

<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>

And corresponding 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);
            }
        }
    });

Tapping on the first TextView will collapse and expand the CardView along with the animation.