How to get marker position after drag

Ionic Native
1

Hello everbody, i`m newbie here, how to get marker position after drag ? im using gmpas native. thanks a alot.

lokasisaya.ts

import { Component} from '@angular/core';
import { IonicPage, NavController, NavParams,Platform } from 'ionic-angular';
import { GoogleMaps, GoogleMap, Environment,MyLocationOptions,LocationService,
         GoogleMapsEvent, GoogleMapOptions, CameraPosition,
         MarkerOptions, Marker, MyLocation } from '@ionic-native/google-maps';
import { Geolocation } from '@ionic-native/geolocation';
                 



/**
 * Generated class for the LokasisayaPage page.
 *
 * See https://ionicframework.com/docs/components/#navigation for more info on
 * Ionic pages and navigation.
 */

@IonicPage()
@Component({
  selector: 'page-lokasisaya',
  templateUrl: 'lokasisaya.html',
})
export class LokasisayaPage {

  map:GoogleMap;


  constructor(public navCtrl: NavController, public navParams: NavParams, public platform : Platform,
    private geolocation: Geolocation) {
  
  }

  ionViewDidLoad() {
    this.platform.ready().then(() => {
      this.loadMap();
    });
  
  }


  loadMap(){
  let option: MyLocationOptions ={
    // true: use gps as much as possible ( use battery usage alot)
    // false : use network location or lastKnownLocation
    // (save battery usage)
   
    
    enableHighAccuracy:true
  };
  LocationService.getMyLocation(option).then((myLocation: MyLocation) => {
    let mapOptions: GoogleMapOptions = {
      camera: {
         target:myLocation.latLng,
         zoom: 18,
         tilt: 30,
         bearing:50
       },
       controls:{
       compass:true,
       myLocationButton: true,
       zoom:true
       },
       gestures: {
         scroll:true,
         tilt:true,
         rotate:true,
         zoom:true
       }

    };
    // if you want to run your app on browser
    Environment.setEnv({
      'API_KEY_FOR_BROWSER_RELEASE': 'API URL',
     'API_KEY_FOR_BROWSER_DEBUG':''
    });
    
    // Create a map
  // after the view is ready
  // and the native platform is ready.

  this.map = GoogleMaps.create('Map',mapOptions);
  
  this.map.addMarker({
    title:'Tekan untuk Geser',
    icon: 'green',
    animation: 'DROP',
    position: myLocation.latLng,
    draggable: true
  }).then((marker: Marker) => {
  
    marker.showInfoWindow();
  console.log(myLocation.latLng);
  });
  
});
 
}


}
2

Use this.marker1.on('position_changed').subscribe() or this.marker1.on(GoogleMapsEvent.MARKER_DRAG_END).subscribe()

4 
let marker : Marker = this.map.addMarkerSync({
  position: myLocation.position,
  ....
});

marker.on(GoogleMapsEvent.MARKER_DRAG_END).subscribe ((params: any[]) => {
  let position: ILatLng = params[0];
});