Need Suggestions topic

HI i have android app development experience for 2 years.

I understand the framework but when it comes to typical situation when i think it would have been better if more android internals were given or more documentation was available.

So my question is for app developers what is the next stage for learning in android development So that we have deeper understanding of the framework and solve typical issues as well. for eg

Activity finish() dismissis and removes the dialog in that activity but i could not find any docs regarding this. so i was in dilemna what to do?


Please help how to advance more into android and if possible please give links to study material or links where i can get a path

Thanks