RecyclerView: Highlight selected item

Question

I have implemented a RecyclerView and I have set it up to use CAB. But how can I highlight the selected items? If a certain position I checked I stored in a SparseBooleanArray. My first thought was to store the specific View containg all the elements in my ViewHolder and then in onBindViewHolder set the background somehow to: ?android:attr/activatedBackgroundIndicator But how can I do that? Is that a useful approach?

Sanborn

Was this ever resolved? – Sos

Answer 1

I finally solved this by simply adding some minor things:

First of all, the items of the RecyclerView have to use this as background:

android:background="?android:attr/activatedBackgroundIndicator"

Then for the RecyclerView simply call: setSelected(true); on the indiviual views.

Sanborn

can you please write the full code? It did not work for me – Sandrasandro

@Paul Woitaschek can you provide any code how you solved it please ? – Icbm

Answer 2

If you want to change the View itself, you need to dispatch adapter.notifyItemChanged(position) and in return, recycler view will call onBind method where you can set the background.

If you don't need to update the view itself, I would suggest using an item decorator.

Antisana

What you mean with not need to update the view itself? How can I decorate a single item in a view with item decorator? And how can I set the background with android:attr/activatedBackgroundIndicator? – Sanborn