如何在ExpandableListView中实现Click Listener

Question

I have a custom adapter, which extends BaseExpandableListAdapter .

I want my ExpandableList to expand and collapse when I'm clicking some TextView .

How should I implement it?

I suppose, i have to add OnClickListener to methods getGroupView and getChildView . And I see, there is boolean flag isExpanded .

So it should look like this:

@Override
public View getGroupView(int groupPosition, final boolean isExpanded,
                         View convertView, ViewGroup parent) {
textView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (isExpanded){

               //What should i write here?
            }
        }
    });
    return convertView;
}

But what should I write in OnClickListener ? I cannot find any functions, which allow me to expand/collapse my listview.

Is there any function like listView.expandGroup(itemPosition); ?

Answer 1

There actually is an ExpandableListView.expandGroup . And it's reverse action collapseGroup .

If the TextView you are referring to is inside a listview item, then you are correct to the action inside an onClickListener inside the adapter. This post talks about expanding an ExpandableListView dynamically, I think you can just get the idea and reverse the action in order to do what you are aiming for.

Hope this helps. Cheers! :D

Answer 2

The TextView you want to works as expand or collapse button for a group when you click on it must be a header of the ExpandableListViewAdapter.

Also you have setOnGroupExpandListener, and setOnGroupCollapseListener that triggers when a group is expanded or collapsed.