a2dp

I have several questions to the CoreAudio AudioSession framework related to several Bluetooth tasks and I hope someone can help me with these issues or at least can confirm my latest findings. The usecase is a navigation app that wants to connect with a bluetooth enabled radio which supports both, HFP and A2DP. I have read the whole AudioSession Programming Guidelines but I have still some open issues especially using audio output through Bluetooth. Bluetooth HFP audio output (kAudioSessionOutputRoute_BluetoothHFP) is only possible in case of AudioSession kAudioSessionCategory_PlayAndRecord is

Is it possible to stream audio over bluetooth? During my research I found that is it only possible using A2DP(Advanced Audio Distribution Profile) . And does every android device support A2DP? If not, is it possible to stream audio between two android devices using bluetooth? Please help me understand this. I've looked through the following links: Receive audio via Bluetooth in Android , Google confirms bluetooth audio streaming fix for next version of Android 4.2 How can I stream audio from another device via Bluetooth? Is it possible to stream audio over Bluetooth? Below sort of thread says

I'm trying to send track informations via A2DP/AVRCP. Right now, music is perfectly streamed, but on the "receiver" (ie: car audio), the "track informations screen" is blank (which is not the case using popular players out there). Any idea ? This code worked for me: private static final String AVRCP_PLAYSTATE_CHANGED = "com.android.music.playstatechanged"; private static final String AVRCP_META_CHANGED = "com.android.music.metachanged"; private void bluetoothNotifyChange(String what) { Intent i = new Intent(what); i.putExtra("id", Long.valueOf(getAudioId())); i.putExtra("artist", getArtistName