If you are developing on Android professionally rather than experimenting for fun, you might like to look at a new product from Klocwork that performs static code analysis.

Klocwork Solo identifies critical bugs and security vulnerabilities in Android Java source code. It’s fully integrated into Eclipse IDE.  The static code analysis detects more than 200 different security vulnerabilities and quality defects without the need to run or generate test cases. It also identifies issues specific to Android mobile device development, including a range of issues that can cause runtime failures, such as null object references, resource leaks and usage of already freed resources.

Klocwork Solo costs $299US per user, per year, with a limited time offer of $99 per user, per year until June 30, 2009.