解决方法
如果A已经运行,则可以在启动意图回到A时使用
FLAG_ACTIVITY_CLEAR_TOP标志.
另见,类似的问题:
How to clear current activities in the stack?
how to kill sub activities and bring activity to top of stack
另见,类似的问题:
How to clear current activities in the stack?
how to kill sub activities and bring activity to top of stack