DragListener.kt

(map_view as SupportMapFragment).getMapAsync { map ->
    // move camera ke jakarta
    map.moveCamera(CameraUpdateFactory.newLatLngZoom(jakartaLatLng, 18f))
                                              
    // get old position camera
    val oldPosition = map.cameraPosition.target

    map.setOnCameraMoveStartedListener {
        // drag started
    }

    map.setOnCameraIdleListener {
        // get new position setelah di drag
        val newPosition = map.cameraPosition.target
        if (newPosition != oldPosition) {
          // drag ended
          
        }
    }
}