protected override void OnElementChanged(ElementChangedEventArgs <Page> e)
{
base.OnElementChanged(e);
myAMapPage = e.NewElement as TencentMapPage;
layout1 = new LinearLayout(this.Context);
this.AddView(layout1);
mapView = new MapView(this.Context)
{
LayoutParameters = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MatchParent, ViewGroup.LayoutParams.MatchParent)
};
LatLng SHANGHAI = new LatLng(31.238068, 121.501654);
mapView.Map.SetCenter(SHANGHAI);
var pins = myAMapPage.Pins;
Drawable d = Resources.GetDrawable(Resource.Drawable.red_location);
Bitmap bitmap = ((BitmapDrawable)d).Bitmap;
LatLng latLng1;
foreach (UserTaskEntInfo pin in pins)
{
latLng1 = new LatLng(pin.Longitude ?? 31.238068, pin.Latitude ?? 121.501654);
var markOption = new MarkerOptions();
markOption.InvokeIcon(new BitmapDescriptor(bitmap));
markOption.InvokeTitle(pin.Name);
markOption.InvokePosition(latLng1);
var fix = mapView.Map.AddMarker(markOption);
fix.ShowInfoWindow();
}
mapView.Map.SetZoom(15);
mapView.OnCreate(bundle);
layout1.AddView(mapView);
}
private void AddMarker(GoogleMap map, double lat, double lon, int title, int snippet)
{
MarkerOptions options = new MarkerOptions();
options.InvokePosition(new LatLng(lat, lon));
options.InvokeTitle(GetString(title));
options.InvokeSnippet(GetString(snippet));
map.AddMarker(options);
}
private void setUpMap()
{
LatLng SHANGHAI = new LatLng(31.238068, 121.501654);
aMap.MoveCamera(CameraUpdateFactory.NewLatLngZoom(SHANGHAI, 14));
aMap.MapType = AMap.MapTypeNormal;
var pins = myAMapPage.Pins;
Drawable d = Resources.GetDrawable(Resource.Drawable.red_location);
Bitmap bitmap = ((BitmapDrawable)d).Bitmap;
LatLng latLng1;
foreach (UserTaskEntInfo pin in pins)
{
latLng1 = new LatLng(pin.Longitude ?? 31.238068, pin.Latitude ?? 121.501654);
var markOption = new MarkerOptions();
markOption.InvokeIcon(BitmapDescriptorFactory.FromBitmap(bitmap));
markOption.InvokeTitle(pin.Name);
markOption.InvokePosition(latLng1);
var fix = aMap.AddMarker(markOption);
fix.ShowInfoWindow();
}
aMap.SetLocationSource(this); // 设置定位监听
aMap.UiSettings.MyLocationButtonEnabled = true; // 设置默认定位按钮是否显示
aMap.MyLocationEnabled = true; // 设置为true表示显示定位层并可触发定位，false表示隐藏定位层并不可触发定位，默认是false
//aMap.SetMyLocationType(AMap.LOCATION_TYPE_LOCATE);//设置定位的类型为跟随模式，3D地图才有;
// 自定义系统定位小蓝点
MyLocationStyle myLocationStyle = new MyLocationStyle();
myLocationStyle.InvokeMyLocationIcon(BitmapDescriptorFactory.FromResource(Resource.Drawable.location_marker)); // 设置小蓝点的图标
myLocationStyle.InvokeStrokeColor(Android.Graphics.Color.Black); // 设置圆形的边框颜色
myLocationStyle.InvokeRadiusFillColor(Android.Graphics.Color.Argb(100, 0, 0, 180)); // 设置圆形的填充颜色
myLocationStyle.InvokeStrokeWidth(1.0f); // 设置圆形的边框粗细
aMap.SetMyLocationStyle(myLocationStyle);
}
protected override void OnElementChanged(ElementChangedEventArgs <Xamarin.Forms.View> e)
{
base.OnElementChanged(e);
if (e.NewElement == null || e.OldElement != null)
{
return;
}
//e.NewElement就是承载的界面，这里就是PCL项目里面的MainPage
//var mainPage = e.NewElement as TencentMapSamples;
var mainPage = e.NewElement as Samples.Controls.TencentMap;
//初始化mapView
mapView = new MapView(this.Context);
mapView.OnCreate(null);
//初始化视图
layout = new LinearLayout(this.Context);
layout.AddView(mapView);
this.AddView(layout);
//这里可以比对以下我们的写法跟腾讯官网里Java写法的区别，可以看出Java里面的属性是set,get前缀，而在C#里面都被隐藏了，直接用C#惯用的属性写法来代替，而方法则还是同样的SetXXX(),GetXXX()，但是Java是camelCasing，C#用PascalCasing写法（博主非常喜欢C#写法，而很讨厌Java的写法 :-)）。这些区别，都是Xamarin 里 绑定Java库的转换规则。
#region TencentMap类
//腾讯地图的设置是通过TencentMap类进行设置，可以控制地图的底图类型、显示范围、缩放级别、添加 / 删除marker和图形，此外对于地图的各种回调监听也是绑定到TencentMap。下面是TencentMap类的使用示例：
//获取TencentMap实例
TencentMap tencentMap = mapView.Map;
//设置实时路况开启
tencentMap.TrafficEnabled = true;
//设置地图中心点
tencentMap.SetCenter(new Com.Tencent.Mapsdk.Raster.Model.LatLng(30.605870, 104.068610));
//设置缩放级别
tencentMap.SetZoom(11);
#endregion
#region UiSettings类
//UiSettings类用于设置地图的视图状态，如Logo位置设置、比例尺位置设置、地图手势开关等。下面是UiSettings类的使用示例：
//获取UiSettings实例
UiSettings uiSettings = mapView.UiSettings;
//设置logo到屏幕底部中心
uiSettings.SetLogoPosition(UiSettings.LogoPositionCenterBottom);
//设置比例尺到屏幕右下角
uiSettings.SetScaleViewPosition(UiSettings.ScaleviewPositionRightBottom);
//启用缩放手势(更多的手势控制请参考开发手册)
uiSettings.SetZoomGesturesEnabled(true);
#endregion
#region 使用marker
//注意，这里要往resources/drawable/里添加一个red_location.png的图片
var bitmap = Resources.GetBitmap("red_location.png");
BitmapDescriptor des = new BitmapDescriptor(bitmap);
foreach (var item in mainPage.Options)
{
MarkerOptions options = new MarkerOptions();
options.InvokeIcon(des);
options.InvokeTitle(item.Title);
options.Anchor(0.5f, 0.5f);
options.InvokePosition(new LatLng(item.Lat, item.Lng));
options.Draggable(true);
Marker marker = mapView.AddMarker(options);
marker.ShowInfoWindow();
}
#endregion
}
private void MoveMarker(MarkerOptions pin, Icon icon, double lat, double lng)
{
pin.InvokeIcon(icon);
pin.InvokePosition(new LatLng(lat, lng));
}
private void ShowMarkers()
{
if (AddressSelectionMode == AddressSelectionMode.DropoffSelection)
{
var position = new LatLng(PickupAddress.Latitude, PickupAddress.Longitude);
_destinationPin.Marker.Remove();
_pickupOverlay.Visibility = ViewStates.Invisible;
_destinationOverlay.Visibility = ViewStates.Visible;
if (PickupAddress.HasValidCoordinate())
{
_pickupPin.Marker.Remove();
_pickupPin.InvokeIcon(_hailIcon);
_pickupPin.InvokePosition(GetMarkerPositionWithAnchor(position, _pickupPin.Icon));
Map.AddMarker(_pickupPin);
}
else
{
_pickupPin.Marker.Remove();
}
}
else if (AddressSelectionMode == AddressSelectionMode.PickupSelection)
{
_pickupPin.Marker.Remove();
_destinationOverlay.Visibility = ViewStates.Invisible;
_pickupOverlay.Visibility = ViewStates.Visible;
if (DestinationAddress.HasValidCoordinate())
{
var position = new LatLng(DestinationAddress.Latitude, DestinationAddress.Longitude);
_destinationPin.Marker.Remove();
_destinationPin.InvokeIcon(_destinationIcon);
_destinationPin.InvokePosition(GetMarkerPositionWithAnchor(position, _destinationPin.Icon));
Map.AddMarker(_destinationPin);
}
else
{
_destinationPin.Marker.Remove();
}
}
else
{
_destinationOverlay.Visibility = ViewStates.Gone;
_pickupOverlay.Visibility = ViewStates.Gone;
if (PickupAddress.HasValidCoordinate())
{
var position = new LatLng(PickupAddress.Latitude, PickupAddress.Longitude);
_pickupPin.Marker.Remove();
_pickupPin.InvokeIcon(_hailIcon);
_pickupPin.InvokePosition(GetMarkerPositionWithAnchor(position, _pickupPin.Icon));
Map.AddMarker(_pickupPin);
}
else
{
_pickupPin.Marker.Remove();
}
if (DestinationAddress.HasValidCoordinate())
{
var position = new LatLng(DestinationAddress.Latitude, DestinationAddress.Longitude);
_destinationPin.Marker.Remove();
_destinationPin.InvokeIcon(_destinationIcon);
_destinationPin.InvokePosition(GetMarkerPositionWithAnchor(position, _destinationPin.Icon));
Map.AddMarker(_destinationPin);
}
else
{
_destinationPin.Marker.Remove();
}
}
}
public void OnAnimationUpdate(ValueAnimator animation)
{
var value = animation.AnimatedValue;
_markerOptions.InvokePosition((LatLng)value);
}