开始新活动时删除旧的活动实例 [英] Delete old activity instance when starting a new activity

问题描述

创建一个(具有相同活动的)新实例时，我希望删除/删除一个旧的活动实例，但是我需要将所有其他活动保留在后栈中(因此FLAG_ACTIVITY_CLEAR_TOP不够用).

I'm looking to delete/remove an old activity instance when a new instance (of same activity) is created, however I need to maintain all other activities in back-stack (therefore FLAG_ACTIVITY_CLEAR_TOP won't suffice).

例如说我有活动A，B和C. 我开始:A-> B-> C->B. 在第二个B活动开始时，我需要删除现有的B活动. 因此，我现在有:A-> C-> B正在运行...

E.g. say I have activities A, B & C. I start: A -> B -> C -> B. On the start of the second B activity I need to remove the existing B activity. Therefore I now have: A -> C -> B running...

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推荐答案

删除活动似乎并不像我想象的那么容易，因此，这不是一个完整的答案，但我将继续使用FLAG_ACTIVITY_REORDER_TO_FRONT.这不会杀死现有活动，而是将其移到堆栈顶部.

It seems that deleting the activity is not as easy as I would have imagined therefore not a complete answer but I'm going to go with using FLAG_ACTIVITY_REORDER_TO_FRONT. This will not kill the existing activity but instead move it to top of stack.

Intent intent = new Intent(ctx, Activity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
startActivity(intent);

这将允许上面概述的活动导航.

This will allow for the activity navigation outlined above.

如果有人知道清除实际活动的方法，我仍然很感兴趣.

I'm still interested if someone knows of a means to clear the actual activity.

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