Over many projects I've run into various problems with Activities doing 
mysterious things.   I've had them not start; I've had onActivityResult not 
get called when I'm trying to send parameters back from an Activity; I've 
had onActivityResult get called *instantly* before the other Activity even 
got created.    Googling the web I see that lots of people have these 
problems and often these either stump people on StackOverflow or result in 
random "superstitious" fixes with no obvious basis - even if they sometimes 
seem to work.
 
So* My Question*:  is there any *systematic* way to debug Activity 
life-cycle problems - are there log files, traces, dumps, or anything that 
programmers can use to figure out why something is happening.    If I call 
"startActivity" and the activity is never created or started, is there 
anyplace Android tells us why?   If onActivityResult is called prematurely 
(i.e., before the Activity that's supposed to return the result even 
exists) how can we find out why it was called?     Are there any hints of 
tricks to interpreting the call stack that can shed light on that?

Thanks in advance for any tips or tricks.

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