EventHandler.java

public class EventHandler {
    public Context mContext;

    public EventHandler(Context context) {
        this.mContext = context;
    }

    public void onEventClicked(View circleImageView, Event event) {
        if (mContext != null) {
            Intent intent = new Intent(mContext, DetailActivity.class);
            intent.putExtra(Constants.EVENT_EXTRA, new Gson().toJson(event));
            ActivityOptionsCompat options = ActivityOptionsCompat.
                    makeSceneTransitionAnimation((Activity) mContext, circleImageView, mContext.getString(R.string.sharedElement));
            mContext.startActivity(intent, options.toBundle());
        }
    }
}