如何完成的应用程序栈的任何previous活动（在任何级别的，我的意思不是直接父），从当前的活动像我想这个无效previous活动的一些特定事件？任何帮助吗？谢谢你。

这是可能通过使用静态变量。就像使用一个布尔变量activity_name_dirty = FALSE; 纪念这个真格的，只要你的无效特定活动发生的情况。因此，调用此活动时，任何时间后对activity_name_dirty状态的检查。 然后，您可以使用活动标志，以创建一个新的即时在活动基础

How to finish any previous activity in application stack (at any level , I mean not immediate parent) , from current activity like on some particular event I want to invalidate this previous activity? Any help ? Thanks.

This may be possible by using static variables. Like use a boolean variable activity_name_dirty = false; mark this as true as soon as your condition of invalidating that particular activity occurs. So any time later when calling this activity have a check on the state of activity_name_dirty. You may then use Activity Flags to create a new instant as described in Activity Fundamentals