Author, Android App Inventor, Android Consultant, and NLP tinkerer
I wrote this: Professional Android Sensor Programming
I published a code library based on the book here: http://www.github.com/gast-lib
In the book I describe implementing Android speech recognition robustly. Also the book details main other topics regarding sensors, audio and image processing, NFC, AOA, and Location Based Services.
I maintain this open source library and frequently reference it in my stack overflow answers. It has a lot of code to help you implement and use speech recognition. Check it http://www.github.com/gast-lib
I have extensive experience with Speech Recognition on Android while writing this Android app: Digital Recipe Sidekick.