Android: Hide child dividers in ExpandableListView

If you want to completely remove dividers from ExpandableListView, setDividerHeight is ok for both parent and child items. Child divider will be draw using the same height as the normal divider or set by setDividerHeight().

And I am using one work around for us to hide one and unhide the other one, just set the divider and items in the same color like below:

 ExpandableListView expView = getExpandableListView();
 expView.setGroupIndicator(null);
 expView.setChildIndicator(null);
 expView.setChildDivider(getResources().getDrawable(R.color.greywhite));        
 expView.setDivider(getResources().getDrawable(R.color.white));
 expView.setDividerHeight(2);

setDividerHeight must below setChildDivider and setDivider, or the height will be 0.

Waiting for more answers...

to hide the child divider set it color to transparent #00000000

define transparent in your color.xml file

<color name="transparent">#00000000</color>

and then set the child divider

listView.setChildDivider(getResources().getDrawable(R.color.transparent))

or in the layout xml file

<ExpandableListView 
android:layout_width="fill_parent"
android:layout_height="fill_parent" 
android:childDivider="#00000000"/>