BaseAdapter for common listview

适配器的抽象基类
Revert "BaseAdapter for common listview"

This reverts commit dcb46bbe6a7b4f59bf423c52276ec9e8762f32e0.
Revert "Revert "BaseAdapter for common listview""

This reverts commit dfbbcd50a9e50da2024f3489f76504172cd2d52a.