Remove SlideListener inside a listener will throw ConcurrentModificationException

[blueberry6401]

I have something like

new SlidingUpPanelLayout.SimplePanelSlideListener() {
            @Override
            public void onPanelStateChanged(...) {
                mSlidingLayout.removePanelSlideListener(this);
            }
}

This will throw ConcurrentModificationException.

[charlesdurham]

Looks like this is because:

private List<PanelSlideListener> mPanelSlideListeners = new ArrayList<>();

Should probably be a CopyOnWriteArrayList http://docs.oracle.com/javase/6/docs/api/java/util/concurrent/CopyOnWriteArrayList.html