If you're using SecureRandom credential storage you should read this official Blog post on the official Android blog to avoid common antipatterns.
WMS On Android
Sam Halperin has written a tutorial about the Web Map Service in the GoogleMaps v2 for Android API. It's intended as a reference to help someone trying to get WMS tiles (i.e. from GeoServer) onto an Android map.
Android Developer Conference
Check out a blog post about a free-to-attend Android developer event at Apps World North America on February 7-8 in San Francisco is all set to feature various leading Android developers, authors, evangelists and operators divulging their expertise on all things Droid.
AnDevCon Spring 2013
AnDevCon Spring, May 28-31, Boston, is the technical conference for software developers building or selling Android apps. Receive a $100 discount off the prevailing rate of either the 4-day or 3-day pass by inserting the code MEDIASPONSOR when prompted on the eRegistration page linked from www.andevcon.com
Backend for your App
Your app is ready but you need a kick ass backend for it? 9elements is specialized in creating stunning webservices. Request a quote.
Sticky Grid Headers
Tonic Artos has created an Android Library that makes it easy to make grid views with sectioned data and headers that stick to the top.
A simple abstraction to upload multipart files directly to Amazon S3.
Niek Haarman has released a library that provides animations for ListViews. The sourcecode is available on BitBucket.
Android Chips EditText
Ketan Parmar has released a ChipsEditTextView which is a tokenized auto-completing text editing field like the recipients field in your gmail client.
A set of utilities to make it easier to work with the android emulator telnet protocol.
Post a job on Android Weekly
Meng To has released a brief guide how to design for Android devices.
Android Kickstarter is a nifty little tool to generate a preconfigured skeleton for your Android app. They've updated some configutions options lately, so if you start with a fresh codebase you should check it out.
Choosing the right libraries to get things done can be a tough job. We've compiled a lot of them that we've found during the last years of Android development.