The pre-eminent source of Android blogs is the Planet Android blog aggregator. At the time of this writing, it aggregates several dozen blogs all into one feed, so you can subscribe once and get a continuous stream of new information.
AndroidSavvy is an Android information aggregator that dynamically shows dozens of RSS feeds, Twitter streams, and hand-picked Android links.
In alphabetical order, here are some prominent Android development blogs you might want to subscribe to individually, if you do not want to subscribe to the entire planet feed:
- Android Developers: the official blog of the core Android team
- AndroidGuys: includes the "Building 'Droids" column by Mark Murphy
- AndroidSnippets: repository of source code snippets, with comments
- Diego Torres Milano: personal blog of an Android developer and trainer
- Ed Burnette's Dev Connection: Android development information, by author of Hello, Android
- Jeff Sharkey: personal blog of core Android team member and ADC contest winner
- Learning Android: repository of Android development tutorials
- Romain Guy: personal blog of core Android team member and GUI development guru