(In some Android development groups, I see some novices asking how to implement QQ friend list. In fact, there are quite a lot of searches on the Internet. I've only been in touch with Android for one year, and I spend most of my time working (Solving bugs...), Rarely participate in interface development. In the system application maintained by yourself, there is an expandablelistview interface (in fact, there are similar examples in Android example apidemo), so write a demo here for beginners & amp# 39; reference resources.
Use of expandablelistview: the difficulty lies in rewriting the baseexpandablelistadapter and the data source provided.)