When comparing The Busy Coder's Guide to Android Development vs Udacity, the Slant community recommends Udacity for most people. In the question“What are the best resources to learn Android development?” Udacity is ranked 1st while The Busy Coder's Guide to Android Development is ranked 8th.
Ranked in these QuestionsQuestion Ranking
Pro Covers a lot of different subjects
This is an extremely large book at around 3500 pages.
The table of contents is extensive, with topics ranging from the process model to power drain and memory leaks.
Pro Updated frequently
"The Busy Coder's Guide to Android Development" is frequently updated (every couple of months) to insure all information is relevant.
Pro Courses taught by industry professionals
Pro All courses are self-paced
Courses are always made available which means there is no waiting for the specific course you want to run. You can work through the courses as fast or as slow as you want.
Pro Offers Nanodegrees
Udacity offers a few different Nanodegrees which provide access to various different courses, project reviews and coaching support for $200/month.
Current options include Front End Web Developer, Data Analyst and Android Developer. See the full list here.
Pro Courses are easy to understand
Pro Actual feedback on coding projects
You get actual feedback from developers on your code, which is useful. Yes having your sites/apps do what it is supposed to do is important, but you need feedback to learn industry standards/best practices and other gotchas that are much harder to learn on your own.
Con PDF only
The updated versions are no longer available in print, and are only available for purchase from the site in PDF.
Con Nanodegrees are expensive
Udacity is quite expensive at $200/month if you want to do a nanodegree.