Shared element transition in RecyclerView

Question

I am trying to use shared element transition on RecyclerView but it doesn't seem to work.

This is a part of my adapter in which I use makeSceneTransitionAnimation() :

public void onBindViewHolder(final BookViewHolder holder, final int position) {
        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(context, DetailsActivity.class);
                ActivityOptionsCompat optionsCompat = ActivityOptionsCompat.makeSceneTransitionAnimation((Activity)context , holder.smallThumbnail, "thumbnailTransition");
                context.startActivity(intent, optionsCompat.toBundle());
            }
        }
}

Answer 1

In your Adapter

holder.smallThumbnail.setTransitionName("thumbnailTransition");
Pair<View, String> pair1 = Pair.create((View) holder.smallThumbnail, holder.smallThumbnail.getTransitionName());

ActivityOptionsCompat optionsCompat = ActivityOptionsCompat.makeSceneTransitionAnimation((Activity) mContext, pair1, pair2);
mContext.startActivity(intent, optionsCompat.toBundle());

In Your Detail Activity

getWindow().setSharedElementEnterTransition(TransitionInflater.from(this).inflateTransition(R.transition.shared_element_transation));
mainImage.setTransitionName("thumbnailTransition");

Here this mainimage is imageview where you want to transform your previous activity thumbnail

shared_element_transation create one xml in res>transition

<?xml version="1.0" encoding="utf-8"?>
<transitionSet xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="500">
<changeBounds />
<fade />
</transitionSet>