Why is .getChildCount() always zero for my ExpandableListView?

Question

I have an ExpandableListView, declared as:

private ExpandableListView mELV_PredefinedFruit;

and uses an adapter which extends BaseExpandableListAdapter. It displays onscreen correctly with various children in 2 groups (both expanded). However I always get zero which I check the number of children at the end of the Activity onCreate using the following:

int numberOfChildViews = mELV_PredefinedFruit.getChildCount();
Log.d(LOG_CLASS, String.format(Locale.US, "%s number of child views in ELV:  %d", METHOD, numberOfChildViews));

Why is it always zero?

Answer 1

You are getting 0, because your view is not yet ready. Try this:

mELV_PredefinedFruit.post(new Runnable() {
    @Override
    public void run() {
        int numberOfChildViews = mELV_PredefinedFruit.getChildCount();
        Log.d(LOG_CLASS, String.format(Locale.US, "%s number of child views in ELV:  %d", METHOD, numberOfChildViews));
    }
});