Voice Recognition in Android

When i click on Voice Search button on Android (SDk 2.2 ) phone then an icon with a mic and text SPEAK NOW appears on phone screen. After speaking any command like "hello" a new screen with text "WORKING" and a progress bar appears. I want to know where does Voice recognition happen and where doe开发者_运维技巧s actual Voice Analysis takes place?

Which APIs can be used to capture both events?

The actual processing of the speech is not done on the phone, it is done on a server. For a nice and simple overview of using speech recognition you could read this article: http://www.4feets.com/2009/04/speech-recognition-in-android-sdk-15/ It's a little old but has useful information to begin with.