Gesture Search from Google Labs now has an API. You can use the API to easily integrate Gesture Search into your Android apps, so your users can gesture to write text and search for application-specific data.
The Official Google Code Blog have a post, Add Gesture Search to your Android apps, demonstrate how we can embed Gesture Search (1.4.0 or later) into an Android app that enables a user to find information about a specific country.
link:
- The Official Google Code Blog: Add Gesture Search to your Android apps
