Building applications with Maven Android Plugin
From Android Wiki
Maven is becoming increasingly popular among Java developers, for several reasons.
There is a Maven Android Plugin available for Android developers who want to use the power of Maven for their Android application development. Maven Android Plugin lets you build Android application (apk) projects with Maven, with minimal configuration.
Please see the homepage of maven-android-plugin (Google Code).
It has a Getting Started guide, as well as examples of how you can set up your pom.xml. More documentation is also available in the Android chapter of the free book Maven: The Complete Reference available on the sonatype site