What is the fastest way to learn about android apps?

Java code geeks and kilobolt.com. Both web sites are providing online courses . They can be helpful. Best Practice is the best way to learn it.

the fastest way is by examples and traying

To learn android.You must start from a book/video tutorials.Try the code too.1.Video tutorials2.BooksAfter spending some then you think you quite understand the basics of android then start making a simple android app to polish your skills.Well one of the best platform to learn about these things is Stackoverflow