Added suport for animation’s listener with an example

[VictorAlbertos]

Hi!

I use this library frequently and I think it’s really useful. But something I’ve missed so far it’s a group of callbacks to listening for when a row is expanding or collapsing (starting or ending). For that reason, I’ve added a simple interface to handle it:

public interface SlideExpandableListener { public void onStartExpandAnimation(View view, int position); public void onEndExpandAnimation(View view, int position); public void onStartCollapseAnimation(View view, int position); public void onEndCollapseAnimation(View view, int position); }

This interface could be implemented and linked to an instance of SlideExpandableListAdapter as follow:

slideAdapter.setExpandableSlideListener(new SlideExpandableListener() {

        @Override
        public void onStartExpandAnimation(View view, int position) {
            Log.d("slide", "start animation expand with item position: " + position);
        }

        @Override
        public void onEndExpandAnimation(View view, int position) {
            Log.d("slide", "end animation expand with item position:" + position);
        }

        @Override
        public void onStartCollapseAnimation(View view, int position) {
            Log.d("slide", "start animation collapse with item position: " + position);
        }

        @Override
        public void onEndCollapseAnimation(View view, int position) {
            Log.d("slide", "end animation collapse with item position: " + position);
        }

});

Also, I’ve faced a few problems trying to compile the project with the current version of Android Studio (0.8.14). So I've had to make some changes to get it to work.

Greetings, Victor.

[tjerkw]

There is no need for this listener, since the expansion is always triggered by a click on the Toggle button, which you can listen for.