how to track all the voice calls of the Android mobile?

how to track all the voice calls of the android开发者_JAVA技巧 mobile? i have to do this through android programming. any ideas?

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You want android.provider.CallLog.Calls API here

• There is a nice post with a full example here: http://www.anddev.org/video-tut_-_querying_and_displaying_the_calllog-t169.html
• And another, less complete example here: http://dcpagesapps.com/developer-resources/android/25-android-tutorial-call-logs

To begin with content providers, you can refer to:

• The android dev guide: http://developer.android.com/guide/topics/providers/content-providers.html
• post 1: http://www.androidcompetencycenter.com/2009/01/basics-of-android-part-iv-android-content-providers/
• post 2: http://saigeethamn.blogspot.com/2009/09/android-developer-tutorial-part-10.html