Twitter4J is an unofficial Java library for the Twitter API. It is Android Platform ready as long as developers are using Java 5 or later. Integration can be done easily by including the Java dependencies in the developers pom.xml
Google has announced the launch of Google Maps Android API v2 featuring interactive, vector-based maps that support 2D and 3D views. Developers can use the new version of the Google Maps Android API to create feature-rich, beautifully designed Android apps.