arcgis for flex全国地图天气预报的切切实实贯彻过程解析
系统架构是B/S,开发语言是flex,开发工具是myeclise或者flashbuild,通过调用百度提供的在线天气预报web
api接口的道来促成。
采用地图是ArcGIS全国地图,开发接口也arcgis api for
flex,但是程序可以开展api 接口,可以利用另外GIS
api,地图数据也得变换其他地图数据,拓展性比较好。
先谈谈主界面的布局,只是简单的规划了大约的布局,如下:
首先是个别履行,第一履行是标题;第二执行再次分为两列,第一排列是因此来天气预报查询与显查询的结果,第二列用来显示全国地图。
贴上界面布局的代码:
<s:layout>
<s:VerticalLayout gap=”0″/>
</s:layout>
<s:BorderContainer width=”100%” backgroundColor=”#D7D7D7″>
<s:layout>
<s:VerticalLayout paddingBottom=”7″
paddingLeft=”10″
paddingRight=”10″
paddingTop=”7″/>
</s:layout>
<s:RichText width=”100%”>
flex for arcgis—-天气预报专题
</s:RichText>
</s:BorderContainer>
<s:HGroup width=”100%” height=”100%”
paddingLeft=”1″
paddingTop=”1″>
<s:Group width=”30%” height=”100%” >
<s:Rect width=”100%” height=”100%”>
<s:stroke>
<s:SolidColorStroke color=”0xCECECE”/>
</s:stroke>
</s:Rect>
<s:VGroup width=”100%” height=”100%” horizontalAlign=”center”>
<s:HGroup horizontalAlign=”center” width=”100%” paddingTop=”10″>
<s:Label text=”城市称号:” paddingTop=”4″/>
<s:TextInput id=”txt_userName” text=”广州”/>
</s:HGroup>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Button label=”查询” id=”btn_login”/>
<s:Button label=”查询有” click=”all_clickHandler(event)”/>
</s:HGroup>
<s:Line width=”100%”>
<s:stroke>
<s:SolidColorStroke color=”0xCECECE” weight=”1″/>
</s:stroke>
</s:Line>
<s:VGroup width=”100%” height=”100%” horizontalAlign=”center”
id=”hidepanel” visible=”false”>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Label text=”星期:” paddingTop=”4″/>
<s:Label text=”” paddingTop=”4″ id=”date1″/>
</s:HGroup>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Label text=”温度:” paddingTop=”4″/>
<s:Label text=”” paddingTop=”4″ id=”temperature1″/>
</s:HGroup>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Label text=”白天:” paddingTop=”4″/>
<s:Image id=”dayimg1″ width=”25″ height=”15″/>
</s:HGroup>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Label text=”黑夜:” paddingTop=”4″/>
<s:Image id=”nightimg1″ width=”25″ height=”15″/>
</s:HGroup>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Label text=”气候:” paddingTop=”4″/>
<s:Label text=”” paddingTop=”4″ id=”weather1″/>
</s:HGroup>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Label text=”风向:” paddingTop=”4″/>
<s:Label text=”” paddingTop=”4″ id=”wind1″/>
</s:HGroup>
<s:Line width=”100%”>
<s:stroke>
<s:SolidColorStroke color=”0xCECECE” weight=”1″/>
</s:stroke>
</s:Line>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Label text=”星期:” paddingTop=”4″/>
<s:Label text=”” paddingTop=”4″ id=”date2″/>
</s:HGroup>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Label text=”温度:” paddingTop=”4″/>
<s:Label text=”” paddingTop=”4″ id=”temperature2″/>
</s:HGroup>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Label text=”白天:” paddingTop=”4″/>
<s:Image id=”dayimg2″ width=”25″ height=”15″/>
</s:HGroup>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Label text=”黑夜:” paddingTop=”4″/>
<s:Image id=”nightimg2″ width=”25″ height=”15″/>
</s:HGroup>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Label text=”气候:” paddingTop=”4″/>
<s:Label text=”” paddingTop=”4″ id=”weather2″/>
</s:HGroup>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Label text=”风向:” paddingTop=”4″/>
<s:Label text=”” paddingTop=”4″ id=”wind2″/>
</s:HGroup>
<s:Line width=”100%”>
<s:stroke>
<s:SolidColorStroke color=”0xCECECE” weight=”1″/>
</s:stroke>
</s:Line>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Label text=”星期:” paddingTop=”4″/>
<s:Label text=”” paddingTop=”4″ id=”date3″/>
</s:HGroup>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Label text=”温度:” paddingTop=”4″/>
<s:Label text=”” paddingTop=”4″ id=”temperature3″/>
</s:HGroup>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Label text=”白天:” paddingTop=”4″/>
<s:Image id=”dayimg3″ width=”25″ height=”15″/>
</s:HGroup>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Label text=”黑夜:” paddingTop=”4″/>
<s:Image id=”nightimg3″ width=”25″ height=”15″/>
</s:HGroup>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Label text=”气候:” paddingTop=”4″/>
<s:Label text=”” paddingTop=”4″ id=”weather3″/>
</s:HGroup>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Label text=”风向:” paddingTop=”4″/>
<s:Label text=”” paddingTop=”4″ id=”wind3″/>
</s:HGroup>
<s:Line width=”100%”>
<s:stroke>
<s:SolidColorStroke color=”0xCECECE” weight=”1″/>
</s:stroke>
</s:Line>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Label text=”星期:” paddingTop=”4″/>
<s:Label text=”” paddingTop=”4″ id=”date4″/>
</s:HGroup>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Label text=”温度:” paddingTop=”4″/>
<s:Label text=”” paddingTop=”4″ id=”temperature4″/>
</s:HGroup>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Label text=”白天:” paddingTop=”4″/>
<s:Image id=”dayimg4″ width=”25″ height=”15″/>
</s:HGroup>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Label text=”黑夜:” paddingTop=”4″/>
<s:Image id=”nightimg4″ width=”25″ height=”15″/>
</s:HGroup>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Label text=”气候:” paddingTop=”4″/>
<s:Label text=”” paddingTop=”4″ id=”weather4″/>
</s:HGroup>
<s:HGroup horizontalAlign=”center” width=”100%”>
<s:Label text=”风向:” paddingTop=”4″/>
<s:Label text=”” paddingTop=”4″ id=”wind4″/>
</s:HGroup>
</s:VGroup>
<s:Label width=”100%”
paddingBottom=”0″
text=”地理位置: {mapCoordX.toFixed(4)},{mapCoordY.toFixed(4)}”/>
</s:VGroup>
</s:Group>
<esri:Map id=”myMap” wrapAround180=”true”>
<esri:extent>
<esri:Extent xmin=”71.6184779133381″ ymin=”29.726061424023065″
xmax=”135.50700591988112″ ymax=”54.94834808582403″>
<esri:SpatialReference wkid=”4326″/>
</esri:Extent>
</esri:extent>
<esri:infoWindowContent>
<s:TextArea id=”myTextArea”
width=”250″ height=”75″/>
</esri:infoWindowContent>
<esri:ArcGISDynamicMapServiceLayer
url=”http://localhost:6080/arcgis/rest/services/weather/MapServer"/>
<esri:GraphicsLayer id=”myGraphicsLayer”/>
</esri:Map>
</s:HGroup>
红色背景的url是地图披露的劳务,调用显示全国地图。后台的基本实现:
<fx:Declarations>
<!– 将非可视元素(例如服务、值对象)放在这里 –>
<s:HTTPService id=”httpSer” method=”POST”>
</s:HTTPService>
<esri:PictureMarkerSymbol id=”sfs”/>
<!– <esri:PictureMarkerSymbol id=”sfs1″/>–>
<!– Layer with US States –>
<esri:QueryTask id=”queryTask”
url=”http://localhost:6080/arcgis/rest/services/weather/MapServer/0"/>
<esri:Query id=”query”
outSpatialReference=”{myMap.spatialReference}”
returnGeometry=”true”
text=”{str}”>
<esri:outFields>
<fx:String>Name</fx:String>
<fx:String>X</fx:String>
<fx:String>Y</fx:String>
</esri:outFields>
</esri:Query>
</fx:Declarations>
httpSer是宣称HTTPService,因为天气预报是调用在线的http形式来贯彻之;queryTask是为此来query查询的规格设置的,作用是为了每个市之天气预报图标定位于地图上显示,url是点名用哪个图层来进展query查询。
程序运行时候显得的凡全国城市的天气预报图标和信息,所以于初始化时候定义并调用CityCodeDB.xml文件来收获有的都市名称。
public const xmlUrl:String = “CityCodeDB.xml”;
初始化函数:
private function init():void{
getallcityinfo();//获取具有的市信息
}
/*
* 获取有城市信息和相关的天气预报信息
*/
private function getallcityinfo():void{
myGraphicsLayer.clear();
//HTTPService,为了监听初始化时候加载所有的都市天气预报,从部署文件xml获取有的城池信息
var service:HTTPService = new HTTPService();
service.url = xmlUrl;
service.addEventListener(ResultEvent.RESULT, resultHandler);
service.send();
}
private function resultHandler(event:ResultEvent):void{
citys = event.result.CityCode.City; //获取到有的布局文件都名称集合
var service:HTTPService = new HTTPService();
service.addEventListener(ResultEvent.RESULT,
cityresultHandler);//为了监听具体的每个都天气预报信息
for(var i:int;i<citys.length;i++){
str=citys[i].Name;
var params:URLVariables = new URLVariables();
params.name =encodeURIComponent(citys[i].Name); //编码
service.url =
“http://api.map.baidu.com/telematics/v3/weather?location="+ params.name+
“&ak=YknGmxIoPugT7YrNrG955YLS”;//调用百度提供天气预报的api接口
service.send();
}
private function cityresultHandler(event:ResultEvent):void{
var weather:Weather = new
Weather();//自定义的近乎,主要是概念跟天气预报信息接口对应的字段,比如温度等
if(event.result.CityWeatherResponse.results){
weather.cityname =
event.result.CityWeatherResponse.results.currentCity;//当前之都会称号
weather.date
=event.result.CityWeatherResponse.results.weather_data.date; //星期
weather.dayPictureUrl=event.result.CityWeatherResponse.results.weather_data.dayPictureUrl;//白天图标
weather.nightPictureUrl=event.result.CityWeatherResponse.results.weather_data.nightPictureUrl;//黑夜图标
weather.temperature=event.result.CityWeatherResponse.results.weather_data.temperature;//温度
weather.weather=event.result.CityWeatherResponse.results.weather_data.weather;//气候
weather.wind=event.result.CityWeatherResponse.results.weather_data.wind;//风向
query.text = weather.cityname;//为了动态的换代query查询text条件
queryTask.execute(query, new AsyncResponder(onResult, onFault));
function onResult(featureSet:FeatureSet, token:Object = null):void
{
if (featureSet.features.length == 0)
{
Alert.show(“地图及没有找到有关数据一定”);
}
else
{
//动态的变动显示在地图上的图标和graphic
var sps:PictureMarkerSymbol = new PictureMarkerSymbol();
sps.source = weather.dayPictureUrl[0];
var graphic:Graphic = new
Graphic(featureSet.features[0].geometry,sps,null);
graphic.toolTip = “当前市:”+weather.cityname+”\n”+”星期:” +
weather.date[0] + “\n” + “温度:” + weather.temperature[0]
+”\n”+”气候:”+weather.weather[0]+”\n”+”风向:”+weather.wind[0];
myGraphicsLayer.add(graphic);
}
}
function onFault(info:Object, token:Object = null):void
{
Alert.show(info.toString());
}
}
else{
myGraphicsLayer.clear();
hidepanel.visible = false;
Alert.show(“搜索未至都有关的天气预报数据”);
}
}
到此全国之都天气预报信息及图标都实现了。
下面是查询有城市之天气预报信息,首先以初始化函数init添加httpservice监听事件:
//监听查询按钮单击事件
btn_login.addEventListener(MouseEvent.CLICK,login);
//加载HTTPService的归来监听,为了监听单个城市查询利用
httpSer.addEventListener(ResultEvent.RESULT,httpSerResultHandler);
httpSer.addEventListener(FaultEvent.FAULT,httpSerFaultHandler);
然后以查询按钮事件添加:
//查询天气预报
private function weather(event:MouseEvent):void{
str = txtcity.text; //文本框输入城市名称值
var params:URLVariables = new URLVariables(); //编码
params.name =encodeURIComponent(txt_userName.text);
httpSer.url =
“http://api.map.baidu.com/telematics/v3/weather?location="+ params.name+
“&ak=YknGmxIoPugT7YrNrG955YLShttpSer.send();
}
//返回成功事件
private function httpSerResultHandler(event:ResultEvent):void{
var weather:Weather = new Weather();
if(event.result.CityWeatherResponse.results){
hidepanel.visible = true;
weather.cityname =
event.result.CityWeatherResponse.results.currentCity;
weather.date
=event.result.CityWeatherResponse.results.weather_data.date;
weather.dayPictureUrl=event.result.CityWeatherResponse.results.weather_data.dayPictureUrl;
weather.nightPictureUrl=event.result.CityWeatherResponse.results.weather_data.nightPictureUrl;
weather.temperature=event.result.CityWeatherResponse.results.weather_data.temperature;
weather.weather=event.result.CityWeatherResponse.results.weather_data.weather;
weather.wind=event.result.CityWeatherResponse.results.weather_data.wind;
date1.text = weather.date[0]; //第一上天气预报详情
temperature1.text = weather.temperature[0];
weather1.text = weather.weather[0];
wind1.text = weather.wind[0];
dayimg1.source = weather.dayPictureUrl[0];
nightimg1.source = weather.nightPictureUrl[0];
date2.text = weather.date[1];//第二龙天气预报详情
temperature2.text = weather.temperature[1];
weather2.text = weather.weather[1];
wind2.text = weather.wind[1];
dayimg2.source = weather.dayPictureUrl[1];
nightimg2.source = weather.nightPictureUrl[1];
date3.text = weather.date[2];//第三天天气预报详情
temperature3.text = weather.temperature[2];
weather3.text = weather.weather[2];
wind3.text = weather.wind[2];
dayimg3.source = weather.dayPictureUrl[2];
nightimg3.source = weather.nightPictureUrl[2];
date4.text = weather.date[3];//第四上天气预报详情
temperature4.text = weather.temperature[3];
weather4.text = weather.weather[3];
wind4.text = weather.wind[3];
dayimg4.source = weather.dayPictureUrl[3];
nightimg4.source = weather.nightPictureUrl[3];
// clear the graphics layer
myGraphicsLayer.clear();
queryTask.execute(query, new AsyncResponder(onResult, onFault));
function onResult(featureSet:FeatureSet, token:Object = null):void
{
if (featureSet.features.length == 0)
{
Alert.show(“地图上尚未搜到有关数据一定”);
}
else
{
sfs.source = weather.dayPictureUrl[0];
var graphic:Graphic = new
Graphic(featureSet.features[0].geometry,sfs,null);
graphic.toolTip = “当前城市:”+weather.cityname+”\n”+”星期:” +
weather.date[0] + “\n” + “温度:” + weather.temperature[0]
+”\n”+”气候:”+weather.weather[0]+”\n”+”风向:”+weather.wind[0];
myGraphicsLayer.add(graphic);
myMap.centerAt(featureSet.features[0].geometry as MapPoint);
myMap.zoomIn();
}
}
function onFault(info:Object, token:Object = null):void
{
Alert.show(info.toString());
}
}
else{
myGraphicsLayer.clear();
hidepanel.visible = false;
Alert.show(“搜索未交城有关的天气预报数据”);
}
}
//返回失败事件
private function httpSerFaultHandler(event:FaultEvent):void{
Alert.show(event.fault.message as String,”请求天气预报信息失败提示”);
}
到此,某个城市之天气预报信息查询也促成了。效果图:
备注:
源代码下载:http://download.csdn.net/detail/liguoweioo/8440727
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