If you need information from B to be fed back to A, then start B by
calling startActivityForResult. Then, when B exits, call setResult,
and A will be on top of the Activity stack and its onActivityResult
will fire.

If you don't need information from B, then you can start B using
startActivity. A will still be on top of the Activity stack when B
exits.

Best regards,
Brian Cooley

On May 17, 7:16 pm, ls02 <[email protected]> wrote:
> My understanding there is no way to start another activity reusing
> existing activity instance. Both startActivity and
> startActivityForResult create a new activity instance.

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