如何清除堆栈活动而不清除根活动，并将根活动置于最前面？

Question

I searched a lot of threads and implemented a lot of solutions but I think I want something else. Suppose I have A->B->C->D activities. From activity DI wont to go to the same instance of A and also clear D,C,B activities. I want to resume activity A and not recreate it! How can I do that? But remember, I want also to clear all the other activities, so I in the stack I should have only activity A.

Thank you! :)

Answer 1

just do on back button , Try to call your intent with the flag "BROUGHT TO FRONT"

Intent intent = new Intent(this,A.class);
intent .setFlags(Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT);
startActivity(intent );

Answer 2

Assuming activity 'A' is the root of the task of your application - Using the flag CLEAR_TASK along with NEW_TASK will portray the same behaviour as yours. All you need to do is add these flags in the intent for activity 'A'.

The flag CLEAR_TASK will remove all the activities on top on 'A' and NEW_TASK will create a new task with 'A' (same activity instance) as its root.

Hope this helps