Reflection of hide interface

How can i call registerAudioPortUpdateListener?
I succeeded to call a hidden function.
But, in this situation i need to call a function with hidden inner interface as parameter.

public class AudioManager {
    /**
     * Listener registered by client to be notified upon new audio port connections,
     * disconnections or attributes update.
     * @hide
     */
    public interface OnAudioPortUpdateListener {
        /**
         * Callback method called upon audio port list update.
         * @param portList the updated list of audio ports
         */
        public void onAudioPortListUpdate(AudioPort[] portList);

        /**
         * Callback method called upon audio patch list update.
         * @param patchList the updated list of audio patches
         */
        public void onAudioPatchListUpdate(AudioPatch[] patchList);

        /**
         * Callback method called when the mediaserver dies
         */
        public void onServiceDied();
    }


    /**
     * Register an audio port list update listener.
     * @hide
     */
    public void registerAudioPortUpdateListener(OnAudioPortUpdateListener l) {
        sAudioPortEventHandler.init();
        sAudioPortEventHandler.registerListener(l);
    }
}