Android development tutorials collection
This is my handpicked list of resources for developers who want to start or get better with Android. List will evolve with time, new items will be added, old removed.
START HERE
https://tutsplus.com/course/android-for-the-busy-developer/
http://www.vogella.com/android.html
http://www.vogella.com/java.html
VIDEO TUTORIALS/COURSES
Android Development Tutorial by Derek Banas
http://www.newthinktank.com/videos/android-video-tutorial/
DESIGNER RESOURCES
http://petrnohejl.github.io/Android-Cheatsheet-For-Graphic-Designers/
TESTING
http://vimeo.com/62144863
http://looksok.wordpress.com/2012/03/17/best-android-tdd-tutorials/
PRACTICAL
MORE ADVANCED
http://opensignal.com/blog/2013/07/30/40-developer-tips-for-android-optimization/
HOW TO USE TOOLS
http://www.infinum.co/the-capsized-eight/articles/is-your-android-emulator-just-too-slow