ARTICLES AND TUTORIALS

Create Widgets(vogella.de)
A good tutorial about how to create widgets in Android.

Update the UI(websmithing.com)
This article will show you how to update the UI in an Android activity using data from a background service.

Hands on Open Source Android UI Libraries(androiduipatterns.com)

The Photoshop PSDs Google forgot(androiddesign.info)

LIBRARIES AND CODE

Using the Animation API(nineoldandroids.com)
Android library for using the Honeycomb (Android 3.0) animation API on all versions of the platform back to 1.0!

Toast notification(technotalkative.com)
This is what you need if you want to show an alert message (text notification) to the user of an application.

Custom Toast notification(technotalkative.com)

HEADLINES

SCREENCASTS

APP OF THE WEEK

AirDroid(market.android.com)
AirDroid is a fast, free app that lets you wirelessly manage & control your Android device from a web browser Over-The-Air.