android bluetooth a2dp sink

In early Android devices, the classes which are required to connect to a bluetooth A2DP device is hidden in the API level and in the later devices from Android 4.0 onwards, it is made partially visible. // A2DP Sink. Most relevant Bluetooth events, like connection/disconnection, will Most relevant Bluetooth events, like connection/disconnection, will // generate corresponding broadcast intents or profile proxy events that you can We need an application that will enable an android device (a tablet for instance) to act as a Bluetooth headset and dial-er for another phone. Is it possible to implement this by enabling bluetooth A2DP