What to read or watch about Android?
Android.Binder:
https://habrahabr.ru/post/175517/.
https://habrahabr.ru/post/176131/.
https://habrahabr.ru/post/176631/.
https://habrahabr.ru/post/176093/.
https://www.youtube.com/watch?v=sttlq7i0EhI.
Android.MainThread:
https://www.youtube.com/watch?v=aFGbv9Ih9qQ (constains some intresing moment but in general not so good).
https://m.habrahabr.ru/post/345120/ (about Activity start).
Android.CustomView:
https://www.youtube.com/watch?v=4NNmMO8Aykw (about custom view, contains usefull info about text drawing).
Android.AcrhComponents:
https://www.youtube.com/watch?v=LCOKWgHdBvE (good tutorial about ArchComponents).
Android.Perfomance:
https://www.youtube.com/watch?v=McAvq5SkeTk.
https://www.packtpub.com/application-development/android-high-performance-programming.
Android.TouchSystem:
https://www.protechtraining.com/blog/post/726.
Java.General:
https://www.youtube.com/watch?v=AR9dtVaEUSM (some tricky moments in Java).
Java.Concurrency:
https://www.youtube.com/watch?v=dLDhB6SRXzw (very good about concurrency base concept, contains info about atomics).
https://sourceforge.net/projects/javaconcurrenta (app that shows concurrency with animation).
https://habrahabr.ru/company/luxoft/blog/157273/ (about java.util.concurrent).
https://articles.javatalks.ru/articles/17 (about ThreadLocal).
Algo:
https://www.youtube.com/watch?v=85a-sHg5otU&t=4s (good short info about Java Collections).
https://www.youtube.com/watch?v=L4rGAYXvM54&t=3320s (queue, stacks, linked list).
Architecture:
https://www.youtube.com/watch?v=L634o_Rjly0 (MVC, MVP and co.).
DB:
https://www.youtube.com/watch?v=c4_5rqvmDFU (the most interesting video about DB)
DI:
https://www.youtube.com/watch?v=TUKrtxOydmw (about Dagger and other DI frameworks)