从Realm数据库android向Google地图添加标记

Question

第一次制作应用程序，请耐心等待。我想获取保存在Realm中的位置并将其添加到带有标记的Google地图中。我已经使用SQLlite看到了一些，但是每次打开时我都需要对其进行更新。我正在使用kotlin并坚持在Google提供的MapsActivity上写些什么

object BikeDao {
fun getBikes() : List<Bike> {
    val realm = Realm.getDefaultInstance()
    return realm.where<Bike>().findAll().toList()
}

fun getAvailableBikes() : List<Bike> {
    val realm = Realm.getDefaultInstance()
    return realm.where<Bike>().equalTo("available", true).findAll()
}

fun addBike(bike : Bike) : Bike {
    val realm = Realm.getDefaultInstance()
    val index = realm.where<Bike>().count()
    realm.executeTransaction {
        val newBike = it.createObject<Bike>(index)
        newBike.name = bike.name
        newBike.type = bike.type
        newBike.location = bike.location
        newBike.hourlyPrice = bike.hourlyPrice
        newBike.picture = bike.picture
        newBike.available = bike.available
    }
    bike.id = index
    return bike
}

关注要标记的可用自行车

Google的代码

class MapsActivity : AppCompatActivity(), OnMapReadyCallback {

private lateinit var mMap: GoogleMap
private val bikeList = BikeDao.getBikes()

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_maps)
    // Obtain the SupportMapFragment and get notified when the map is ready to be used.
    val mapFragment = supportFragmentManager
        .findFragmentById(R.id.map) as SupportMapFragment
    mapFragment.getMapAsync(this)
}

override fun onMapReady(googleMap: GoogleMap) {
    mMap = googleMap

    /*
    val Copenhagen = LatLng(55.6761, 12.5683)
    mMap.addMarker(MarkerOptions().position(Copenhagen).title("Marker in Copenhagen"))
    mMap.moveCamera(CameraUpdateFactory.newLatLng(Copenhagen))
    googleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(Copenhagen,12f))

     */
}

}