Application Activity taskAffinity allowTaskReparenting
application1 Activity1 com.winuxxan.affinity true
application2 Activity2 com.winuxxan.affinity false
启动application1 按HOME ,再启动application2 ,我们看到的是Activity1,按返回才是Activity2
allowTaskReparenting: 设置为true后,当该Activity所在的TaskA转入后台,具有相同TaskAffinity TaskB进入前台,那么Activity1会宿主到TaskB