Record Call in android

I am trying to record 开发者_JAVA技巧call in my android application but when I use UPLINK, DOWNLINK as audio source both time it record voice from the MIC. When I used VOICE_CALL it produced noise in recording, is it bug or can anybody help me with this?

Thanks

---

AFAIK , Call recording is not possible in Android, refer this

1. http://groups.google.com/group/android-developers/browse_thread/thread/c2bc85eb60ae2aa5?pli=1
2. http://code.google.com/p/android/issues/detail?id=2117#c226