Listener on the audio output device changes

[frederi...@gmail.com]

Hi,

I have created a custom audio effect. It uses the standard AudioEffect API and is loaded on the main output mixer (session Id 0).

I need to change theaudio effect parameters according to the current audio output device ( speaker, earpiece, headphone or bt ).

I have the needed information via the audio effect command EFFECT_CMD_SET_DEVICE in the audio effect library (located in /system/lib/soundfx)

But for example, when output is Earpiece, I want to disable the library ( and so unload it). 

So I need the same information but on the Java layer (or outside the audio effect library)

How can I have a listener on the audio output device changes and the current device ID ?

At the moment I can only get information about the headphone or BT connection/disconnection.

Thx

Regards

Frederic