These last months I’ve been very busy writing a book about Android development. It covers from the very basics to application testing and using third party libraries to make your life as a developer easier.
It’s available both in ebook and printed format, if you’re interested, grab a copy!
PacktPub
https://www.packtpub.com/application-development/learning-android-application-development
Amazon
https://www.amazon.es/Learning-Android-Application-Development-Montane/dp/1785286110/
O’Reilly
http://shop.oreilly.com/product/9781785286117.do
Rakuten
http://books.rakuten.co.jp/rk/a635fb0c500f374a997c977adbe0d71c/
Kobo
https://store.kobobooks.com/en-us/ebook/learning-android-application-development
Booktopia
http://www.booktopia.com.au/ebooks/learning-android-application-development-raimon-rafols-montane/prod9781783553846.html