Android ExpandableListView scrolling skips children

[Dan Fumosa]

I have an ExpandableListView in Android and have an issue with the scrollbar. I'll do my best to explain the problem. For starters, scrolling normally by swiping the screen works fine. The problem is when I grab the scrollbar on the right to scroll quickly. If I have a parent expanded that is large and takes up several screens, grabbing the scrollbar and pulling down skips the children just jumps to the next parent.

The best way to see the issue is if I have one parent with lets say 100 children. Grabbing the scrollbar in this case would jump from the top of the list to the bottom and not scroll through each children. Below is the XML for my list.

<ExpandableListView
    android:id="@+id/songListView"
    android:layout_width="0dp"
    android:layout_height="0dp"
    android:layout_marginBottom="8dp"
    android:layout_marginTop="8dp"
    android:childDivider="#ffffff"
    android:choiceMode="singleChoice"
    android:divider="#ffffff"
    android:dividerHeight="2dp"
    android:fastScrollEnabled="true"
    android:footerDividersEnabled="true"
    android:groupIndicator="@null"
    android:headerDividersEnabled="true"
    app:layout_constraintBottom_toTopOf="@+id/bottomDivider"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/topDivider"
    tools:layout_constraintLeft_creator="1"
    tools:listitem="@layout/songlistrow" />

Does anyone have any solution to this or please let me know if I need to be more clear with the description. Thanks in advance for the assistance!

 

[Deleted User]

Are you using View recycling in your list adapter?

 

[Dan Fumosa]

Are you using View recycling in your list adapter?

I believe so, been awhile since I looked at the adapter. I think this has something to do a FastScroll bug that appears to be known based one some more googling.

https://stackoverflow.com/questions...nly-covers-part-of-the-list/17277901#17277901