import android.widget.ExpandableListView.OnGroupCollapseListener; //导入依赖的package包/类
/**
 * prepares the update of the view after the group descriptor was changed
 */
public void prepareReload()
{
    mAdapter = new ExpandableGroupDescriptorAdapter(getActivity(), getLoaderManager(), mGroupDescriptor);
    mExpandableListView.setAdapter(mAdapter);
    mExpandableListView.setOnChildClickListener((android.widget.ExpandableListView.OnChildClickListener) mTaskItemClickListener);
    mExpandableListView.setOnGroupCollapseListener((android.widget.ExpandableListView.OnGroupCollapseListener) mTaskListCollapseListener);
    mAdapter.setOnChildLoadedListener(this);
    mAdapter.setChildCursorFilter(COMPLETED_FILTER);
    restoreFilterState();

}
 

import android.widget.ExpandableListView.OnGroupCollapseListener; //导入依赖的package包/类
/**
* @see ExpandableListView#setOnGroupCollapseListener(OnGroupCollapseListener)
*/
 public W setOnGroupCollapseListener(OnGroupCollapseListener onGroupCollapseListener) {
     mView.setOnGroupCollapseListener(onGroupCollapseListener);
     return (W) this;
 }
 

import android.widget.ExpandableListView.OnGroupCollapseListener; //导入依赖的package包/类
@Override
public void setOnGroupCollapseListener(
		OnGroupCollapseListener onGroupCollapseListener)
{
	mOnGroupCollapseListener = onGroupCollapseListener;
}