使用.GetMapAsync代替.getMap方法与Google Play服务（Xamarin） [英] Use .GetMapAsync instead .getMap method with Google Play Services (Xamarin)

问题描述

一个旧的代码可以完美地工作：

  LatLng location = new LatLng（myClass.myLocation.Latitude，myClass。 myLocation.Longitude）; 
 CameraPosition.Builder builder = CameraPosition.InvokeBuilder（）; 
 builder.Target（location）; 
 builder.Zoom（18）; 
 CameraPosition cameraPosition = builder.Build（）; 
 MapsInitializer.Initialize（this）; 
 CameraUpdate cameraUpdate = CameraUpdateFactory.NewCameraPosition（cameraPosition）; 
 MapFragment googleMap = FragmentManager.FindFragmentById< MapFragment> （Resource.Id.map）; 
 theMap = googleMap.Map; 
 if（theMap！= null）{
 theMap.MapType = GoogleMap.MapTypeNormal; 
 theMap.MoveCamera（cameraUpdate）; 
} 
  

但现在 .Map 已过时并且不推荐使用，我必须以某种方式使用 .GetMapAsync ：

  theMap = googleMap.GetMapAsync（IOnMapReadyCallback）; 
  

但我不明白。

<有人可以帮我吗？

你的地图片段类必须实现 OnMapReadyCallback

code>并覆盖 onMapReady（）：

  @Override 
 public void onMapReady（最终GoogleMap地图）{
 this.map = map; 
 map.setMyLocationEnabled（true）; 
 
 $ / code> 

在您的 onCreateView 使用 getMapAsync（）设置片段上的回调：



  MapFragment mapFragment =（MapFragment）getFragmentManager（）
 .findFragmentById（R.id.map）; mapFragment.getMapAsync（本）; 
  

实现google maps V2所需的全部内容如下：
https://developers.google.com/maps/documentation/android/map

An old code works perfectly in this way:

LatLng location = new LatLng (myClass.myLocation.Latitude, myClass.myLocation.Longitude);
CameraPosition.Builder builder = CameraPosition.InvokeBuilder ();
builder.Target (location);
builder.Zoom (18);
CameraPosition cameraPosition = builder.Build ();
MapsInitializer.Initialize (this);
CameraUpdate cameraUpdate = CameraUpdateFactory.NewCameraPosition (cameraPosition);
MapFragment googleMap = FragmentManager.FindFragmentById<MapFragment> (Resource.Id.map);
theMap = googleMap.Map;
if (theMap != null) {
    theMap.MapType = GoogleMap.MapTypeNormal;
    theMap.MoveCamera (cameraUpdate);
}

but now that the .Map is obsolete and deprecated, I must to use .GetMapAsync in some way:

theMap = googleMap.GetMapAsync (IOnMapReadyCallback);

But I don't understand how.

There is somebody that can help me?

解决方案

Your map fragment class must implement OnMapReadyCallback and override onMapReady():

@Override
public void onMapReady(final GoogleMap map) {
    this.map = map;
    map.setMyLocationEnabled(true);
}

In your onCreateView use getMapAsync() to set the callback on the fragment:

MapFragment mapFragment = (MapFragment) getFragmentManager()
    .findFragmentById(R.id.map); mapFragment.getMapAsync(this);

All that you need to implement the google maps V2 is here: https://developers.google.com/maps/documentation/android/map

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