HeadsetDetection

HeadsetPlugReciever.kt

import android.content.BroadcastReceiver
import android.content.Context
import android.content.Intent
import timber.log.Timber

class HeadsetPlugReciever : BroadcastReceiver() {
    override fun onReceive(context: Context?,
                           intent: Intent) {
        if (intent.action != Intent.ACTION_HEADSET_PLUG) {
            Timber.e("jsp HeadsetPlugReciever recieved ${intent.action} event")
            return
        }

        val headset = (intent.getIntExtra("state", 0) == 1)
        val micro = (intent.getIntExtra("micro", 0) == 1) && headset
        val headsetName = intent.getStringExtra("name")

        Timber.d("jsp headset=$headset, micro=$micro, hedsetName=$headsetName")
    }
}

MainActivity.kt

...
// activity
private lateinit var headsetPlugReciever:HeadsetPlugReciever

override fun onCreate() {
        Timber.d("onCreate of overlay service")
        super.onCreate()
      
        // headset listener
        headsetPlugReciever = HeadsetPlugReciever()
        val intentFilter = IntentFilter()
        intentFilter.addAction(Intent.ACTION_HEADSET_PLUG)
        registerReceiver(headsetPlugReciever, intentFilter)
}
override fun onDestroy() {
        unregisterReceiver(headsetPlugReciever)
        super.onDestroy()
}
....