Hackbod's is one of the best answers in SO. It throws light on a very obscure subject. It helped me a lot.
Another really helpful resource is this must-see video: [
Google I/O 2011: Memory management for Android Apps][1]
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**UPDATE:**
Process Stats, a service to discover how your app manages memory explained at this post by Dianne Hackborn: [http://android-developers.blogspot.com.es/2014/01/process-stats-understanding-how-your.html](http://android-developers.blogspot.com.es/2014/01/process-stats-understanding-how-your.html)
[1]:
link