My app has a feature that will work only if a headset is connected

[Android Central Question]

My app has a feature that will work only if a headset is connected. the app then uses the mic and speaker of the headset to work that particular feature. My question is I need this to work with my blue-tooth headset. I have tried all the various switching apps but none seem to work. I have a Samsung S7 edge. What can I do?