DroidSQLi is the first automated MySQL Injection tool for Android. It allows you to test your MySQL-based web application against SQL injection attacks. It was released on April 2013 and later suspended by Google due to the serious damage that could be caused by people using it for non-educational purposes. You can find many videos on YouTube of people using it.
DroidSQLi supports the following injection techniques:
Time based injection
Error based injection
It automatically selects the best technique to use and employs some simple filter evasion methods. The latest version (1.1) can be downloaded from here.