RecyclerView expand/collapse items

Question

I want to expand/collapse the items of my recyclerView in order to show more info. I want to achieve the same effect of the SlideExpandableListView. Basically in my viewHolder I have a view that is not visible and I want to do a smooth expand/collapse animation rather than set the visibility to VISIBLE/GONE only. I only need an item to be expanded at a time and it would be cool to have some elevation to show that the item is selected. It is the same effect of the new Android recent calls history list. The options "CALL BACK" and "DETAILS" are visible only when an item is selected. JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

Answer 1

Please don't use any library for this effect instead use the recommended way of doing it according to Google I/O. In your recyclerView's onBindViewHolder method do this: final boolean isExpanded = position==mExpandedPosition; holder.details.setVisibility(isExpanded?View.VISIBLE:View.GONE); holder.itemView.setActivated(isExpanded); holder.itemView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { mExpandedPosition = isExpanded ? -1:position; TransitionManager.beginDelayedTransition(recyclerView); notifyDataSetChanged(); } }); Where details is my view that will be displayed on touch (call details in your case. Default Visibility.GONE). mExpandedPosition is an int variable initialized to -1 And for the cool effects that you wanted, use these as your list_item attributes: android:background="@drawable/comment_background" android:stateListAnimator="@animator/comment_selection" where comment_background is: and comment_selection is: