RecyclerView Animation on Item Click

Question

I am trying to implement my own recyclerview Animation - I would like to achieve this without using any external libraries. Here is what the theoretical animation should

Answer 1

An easier alternative for @AndyRoid's answer is to use android:animateLayoutChanges="true" property. This way you don't need to write any animation code; however, this is not a way to go if you need to have a control over animation.

You still need to create an OnClickListener:

class CardTapListener implements View.OnClickListener {
    @Override
    public void onClick(View v) {
        View someView = v.findViewById(R.id.view_to_expand);

        if (someView.getVisibility() == View.GONE) {
            someView.setVisibility(View.VISIBLE);
        }
        else if (someView.getVisibility() == View.VISIBLE){
            someView.setVisibility(View.GONE);
        }

    }
}

Attach it to every ViewHolder:

@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
    View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.view_holder_layout, viewGroup, false);
    v.setOnClickListener(new CardTapListener());
    return new ItemViewHolder(v);
}

Don't forget to collapse views when binding a new item:

@Override
public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int i) {
    ...
    // Collapse (probably opened by user previously) view
    ItemViewHolder itemHolder = (ItemViewHolder) viewHolder;
    itemHolder.description.setVisibility(View.GONE);
    ...

}

view_holder_layout.xml:

 ...