Книга: Beginning Android
Android 1.1 debuted Google Voice Search, where you could tap on a microphone icon text to the search field on the home screen, speak your search request, and have the search conducted on what you said.
Android 1.5 opens this up to be available to all applications. You can start an activity using an Intent using the
RecognizerIntent.ACTION_RECOGNIZE_SPEECH action and have the converted text supplied to you in response via