List of casting devices not found sometime why?

[nehal-brainvire]

: MediaRouter.Callback() not getting called sometime ,discovery not working

class ScanCastingDevices(private val context: Context, private val myPreference: MyPreference) {
private var mRouter: MediaRouter? = null
private var mRoute: MediaRouter.RouteInfo? = null
private var castDevice: CastDevice? = null
var deviceInfo:TvDeviceInfo?=null

// Callback for media router
private val mediaRouterCallback = object : MediaRouter.Callback() {
    override fun onRouteAdded(router: MediaRouter, route: MediaRouter.RouteInfo) {
        Log.e("CastMediaRouter", "Route Added: $route")
        castDevice = CastDevice.getFromBundle(route.extras)

        if ((removeHyphens(deviceInfo?.serviceId.toString()) == castDevice?.deviceId) || (deviceInfo?.ipAddress?.equals(
                castDevice?.inetAddress?.hostAddress
            )) == true
        ) {
            myPreference.setCastingDeviceInfo(CAST_DEVICE_INFO, castDevice)
            Log.e("stored device info",myPreference.getCastingDeviceInfo(CAST_DEVICE_INFO)?.inetAddress?.hostAddress.orEmpty())
            stopDiscovery()
        }
    }

    override fun onRouteRemoved(router: MediaRouter, route: MediaRouter.RouteInfo) {
        Log.e("CastMediaRouter", "onRouteRemoved$route : ")

        castDevice = CastDevice.getFromBundle(route.extras)
    }
}

// Initialize MediaRouter
fun initialize() {
     deviceInfo= Utils.getConnectedDeviceInfo(myPreference)
    Log.e("CastMediaRouter_ConnectedDeviceInfo",deviceInfo.toString())
    Log.e("CastMediaRouter", "initialize")

    mRouter = MediaRouter.getInstance(context)
    Log.e("CastMediaRouter", "initialize_startDiscovery : ")

    startDiscovery()
}

// Start discovery for Cast devices
private fun startDiscovery() {
    Log.e("CastMediaRouter", "startDiscovery : ")

    val selector = MediaRouteSelector.Builder()
        .addControlCategory(CastMediaControlIntent.categoryForCast(CastMediaControlIntent.DEFAULT_MEDIA_RECEIVER_APPLICATION_ID))
        .build()
    mRouter?.addCallback(selector, mediaRouterCallback, MediaRouter.CALLBACK_FLAG_FORCE_DISCOVERY)
}

fun stopDiscovery(){
    Log.e("CastMediaRouter", "stopDiscovery : ")

    mRouter?.removeCallback(mediaRouterCallback)
}

}