I need a proof of concept project (simple, no UI needed) with the following features:
1) Detect outgoing calls state: ringing, ring-back, call-waiting, answered, end etc... - all substates of OFFHOOK state.
2) During call take control of sound, mute call sound and play other sound (from sound files).
Outcome of project is an eclipse project, source code & working demo app.
Support for android devices with API level 7 (Android 2.1) and up is required.
Payment only on successful delivery (working), Advance payments are not an option.
Successful developer of this project may receive a continuation project to develop a full scale application.