CODEWITHSUNDEEP
androidandroid-intentandroid-activity
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Reputation: 53

android- bring a activity to top of stack ONLY IF activity exists on stack

I have two activities, A - B on back stack, B on top

I knew I could use FLAG_ACTIVITY_REORDER_TO_FRONT to bring A on top, so that the stack becomes: B - A, A on top

But when there is only one activity, B on the stack: B(no A exists on the stack)

and I found FLAG_ACTIVITY_REORDER_TO_FRONT will create a new A and so that stack becomes: B - A

how do I have A on top ONLY IF A EXISTED on stack??

and

I wonder if there is any way I could check if A exists on back stack??

Upvotes: 0

Views: 332

Answers (1)

Shreyash S Sarnayak
Shreyash S Sarnayak

Reputation: 2335

One trick you could do is to keep a static boolean variable in activity A. Keep it false by default, make it true in onCreate of A and false in onDestroy of A

In activity B check if that value is true then launch it otherwise don't.

Upvotes: 2

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