在flex中xmlns="*"是啥意思

Posted 2023-05-16

xmlns可以看做是个命名空间的引用。至于*号，是任意的as3文件。
这么说来就是与当前文件在同一目录下的任意as3文件，都可以直接引用 参考技术A "::"的作用是标识属性、方法或 XML 属性或特性的命名空间。
关于符号你可以去这里了解一下：

参考技术B 同上

Flex:Google飞过去

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" 
				xmlns:maps="com.google.maps.*" layout="absolute">
	<mx:Script>
		<![CDATA[
			import com.google.maps.MapMouseEvent;
			import com.google.maps.InfoWindowOptions;
			import com.google.maps.overlays.Marker;
			import mx.messaging.messages.IMessage;
			import com.google.maps.controls.NavigationControl;
			import com.google.maps.controls.MapTypeControl;
			import com.google.maps.geom.Attitude;
			import com.google.maps.View;
			import com.google.maps.MapType;
			import com.google.maps.LatLng;
			import com.google.maps.MapOptions;
			import com.google.maps.MapEvent;
			import mx.controls.Alert;
			import mx.messaging.events.MessageEvent;
 
			private static const GOOGLE_MAP_API:String = "GOOGLE_MAPS_KEY";
 
			private var infoWindowFlag:Boolean;
 
			private var initZoom:Number = 3.5;
			private var initLat:Number = 25;
			private var initLng:Number = 10;
			private var initAttitude:Attitude = new Attitude( 0, 0, 0 );
 
			private var flyToFlag:Boolean = false;;
			private var flyToZoom:Number = 3.5;
			private var flightSpeed:Number = 3;
			private var flyToAttitude:Attitude = new Attitude( 20, 30, 0 );
 
 
			private function messageHandler( message:IMessage ):void
			{
				//trace( "messageHandler: " + message );
 
				var latlng:LatLng = new LatLng( message.body.latitude, message.body.longitude );
 
				if( latlng != null ){
					var marker:Marker = new Marker( latlng );					
					marker.addEventListener( MapMouseEvent.CLICK, function(e:MapMouseEvent) { openTheInfoWindow( message, latlng )  }, false, 0, true );
 
					if( flyToFlag ) map.flyTo( latlng, flyToZoom, flyToAttitude, flightSpeed );
 
					openTheInfoWindow( message, latlng );
 
					map.addOverlay( marker );																			
				}
			}
 
			private function openTheInfoWindow( message:IMessage, latlng:LatLng ):void
			{
				if( infoWindowCheckBox.selected ){
					var infoWindowOptions:InfoWindowOptions = new InfoWindowOptions( );				
					infoWindowOptions.title = message.body.city;
					infoWindowOptions.content = "Sample ID: " + message.body.sampleId + " viewed";
					infoWindowOptions.pointOffset = new Point(0, -20);
 					map.openInfoWindow( latlng,  infoWindowOptions );
				}
			}
 
			private function onMapPreInit( e:MapEvent ):void
			{
				var mapOptions:MapOptions = new MapOptions();
				mapOptions.zoom = initZoom;
				mapOptions.center = new LatLng( initLat, initLng );
				mapOptions.mapType = MapType.PHYSICAL_MAP_TYPE;
				mapOptions.viewMode = View.VIEWMODE_PERSPECTIVE;
				mapOptions.attitude = initAttitude;
				map.setInitOptions( mapOptions );
			}
 
			private function onMapReady( e:MapEvent ):void
			{
				map.addControl( new MapTypeControl() );
				map.addControl( new NavigationControl() );
 
				//The Map is constructed, let's subscribe to the message
				consumer.subscribe();
			}
 
			private function toggleFlyTo():void
			{
				if( flyToFlag ){
					map.cancelFlyTo();
					map.flyTo( new LatLng( initLat, initLng ), initZoom, initAttitude, 5 );
				}
 
				flyToFlag = flyToCheckBox.selected;
 
			}
 
			private function toggleInfoWindow():void
			{
				infoWindowFlag = infoWindowCheckBox.selected;
			}
		]]>
	</mx:Script>
	<mx:ChannelSet id="channelSet">		
		<!-- Long Polling Channel -->
		<mx:AMFChannel url="http://tourdeflex.adobe.com:8080/lcds-samples/messagebroker/amflongpolling" />
		<mx:AMFChannel url="http://tourdeflex.adobe.com:8080/lcds-samples/messagebroker/amfpolling" />				
	</mx:ChannelSet>
 
	<mx:Consumer id="consumer" 
				 channelSet="{channelSet}" 
				 destination="tdf.sampleviewingfeed" 
				 subtopic="flex" 
				 message="messageHandler(event.message)" 
				 fault="Alert.show(event.faultString)" />
 
	<maps:Map3D id="map" 
				mapevent_mappreinitialize="onMapPreInit(event)" 
				mapevent_mapready="onMapReady(event)" 
				width="100%" height="100%" 
				key="{GOOGLE_MAP_API}" />
 
	<mx:VBox x="100" y="5">
		<mx:Label fontSize="18" fontWeight="bold" text="Tour De Flex Live Traffic" right="60" />
 
		<mx:CheckBox id="flyToCheckBox" fontWeight="bold" label="FlyTo (animated 3D flight)" click="toggleFlyTo()" />
 
		<mx:CheckBox id="infoWindowCheckBox" fontWeight="bold" selected="true" label="Info Window" click="toggleInfoWindow()" />
	</mx:VBox>
</mx:Application>