RecyclerView expandable cardView

Question

I make small project with RecyclerView with CardView items inside. I created expandable card (expanded by pressing on small button inside the card). Each card always contain

Answer 1

What tecnique are you using in order to do that?

I was in the same situation but for me the problem were these functions ExpandAndCollapseViewUtil.expand() and ExpandAndCollapseViewUtil.collapse() from this tutorial Diseño Android: Tarjetas con CardView so I didn't use it. Instead of that I just show/hide the view of the cardview without any animation.

Answer 2

You can use this lib instance your self developed way, try this:

STEP 1: Add below dependency to your build.gradle file:

**compile 'com.github.traex.expandablelayout:library:1.2.2'** use instead of
 compile 'com.github.traex.expandablelayout:library:1.3'

STEP 2: Add below View to Your card layout ,card_layout Must be look like this:

<com.andexert.expandablelayout.library.ExpandableLayout
    android:id="@+id/row_0"
    xmlns:expandable="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    expandable:headerLayout="@layout/YOUR_CARD_VIEW_UI"
    expandable:contentLayout="@layout/YOUR_CARD_VIEW_EXPANDED_UI"/>

STEP 3: In your define of RecyclerView remember to:

recList.setItemViewCacheSize(ITEMS_COUNT);

Feel free to Ask :-)

Answer 3

I had the same problem and solved it by putting following code (Kotlin) in the ViewHolder

    if (expandableView.isVisible) {
        val recyclerView = containerView?.parent as RecyclerView
        recyclerView.adapter.notifyItemChanged(adapterPosition)
        recyclerView.smoothScrollToPosition(adapterPosition)
    }

As you see before scroll to a position I notified the adapter that the item on this position was changed. And I only do this if the view became visible