ExpandableListView只打开一个组，关闭其他组

当我们在使用ExpandableListView的时候，打开一个组的时候，要关闭其他组；需要用到setOnGroupExpandListener来进行设置

mExpandListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {            @Override            public void onGroupExpand(int groupPosition) {                int count = mExpandListView.getExpandableListAdapter().getGroupCount();                for(int j = 0; j < count; j++){                    if(j != groupPosition){                        mExpandListView.collapseGroup(j);                    }                }            }        });