arcgis for flex全国地图天气预报的切切实实贯彻过程解析

By admin in 亚洲必赢app在哪下载 on 2018年10月10日

     
 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：

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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"/&gt;
<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"/&gt;
<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：

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      备注：

      源代码下载：http://download.csdn.net/detail/liguoweioo/8440727

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      GIS论坛：http://arcgis.c.ev123.com/vip_arcgis.html

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