Child component gets rendered twice onGroupClick event

Question

I am a beginner in android and I trying to make use of ExpandableListView and was having a some issues.

I have a setOnGroupClickListner event in my Activity for the ExpandableListView. For some reason when I click the group, it renders the childView twice, and in order to close it, I have to click twice. On each click only one of the childView gets hidden.

The following was my code

    expandableListView = (ExpandableListView) findViewById(R.id.alarm_list);

    alist = new Alist(this, headings, childItems);
    expandableListView.setAdapter(alist);

    //setting an expand group listener
    expandableListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
        @Override
        public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {
            Log.e("onGroupClick:", "worked");
            parent.expandGroup(groupPosition);
            return false;
        }
    });

Now I somehow could resolve this issue if instead of return false , I write return true in the onGroupClick function.

Can someone explain me what effect does it have to resolve the issue? I read somewhere that if I return true, it means that the click was handled, but I an not able understand what it exactly means.

Any help is appreciated. Thanks in advance

Answer 1

I haven't used ExpandableListView, but to me it looks like you don't have to setOnGroupClickListener explicitly, because it's automatically done for you. If you still need to change the default behavior, then you're free to override it, but you need to return true to signalize that the event is consumed and the default event will not be fired.