How can I get the width of ExpandableListView's group indicator drawable on Android?

Question

If I use the default group indicator (not setting a new one), how can I know the padding width for the layout of groupview?

So can let my layout won't overlap with the group indicator.

Is that possible? Because I can't find a method to getGroupIndicator. Or I must have to set a new one that I know its size.

Answer 1

I found the attribute here:

android:paddingLeft="?android:attr/expandableListPreferredItemPaddingLeft"

Answer 2

Or you can use reflection:

Field field_mIndicatorRight = listView.getClass().getDeclaredField("mIndicatorRight");
field_mIndicatorRight.setAccessible(true);
int mIndicatorRight = (Integer) field_mIndicatorRight.get(listView);