I have an application which runs a background thread which eventually updates listeners on some incoming event.
When I'm in this listeners' code, I want to be able to either show a Toast or a new Activity on top of the screen, regardless of what is running in this moment - but to be able to come back to it (add on top of the current stack, even if it's another application).
By now I didn't succeed in doing that in any way.
This is one attempt (inside my listener, which is called from a worker thread):
It shows the toast when I am in my original application, but not when I'm in background.
I put a breakpoint on the line with the toast showing, and I know that I get there, but it does nothing.
Do you have any idea?