Flash + XML application: XML Information returned by custom events

Problem:

I want to write a class that loads XML externally and return XML Information.

 

Method:

Imitating the flex httpserver class, you can return an XML message;

 

Inside flex

1. Custom events

Package readxml <br/>{< br/> Import flash. events. event; </P> <p> public class sendxmlevent extends event <br/>{< br/> Public var myxml: XML; <br/> Public static const send: string = "send"; <br/> Public Function sendxmlevent (STR: string) <br/>{< br/> super (STR, false, false ); <br/>}</P> <p >}< br/>}

 

 

XML:

<? XML version = "1.0" encoding = "UTF-8"?> <Br/> <songitem> <br/> <song> <br/> <Name> Jay Chou-Rainbow </Name> <br/> <URL> http://www.shinehid.com/media_ B /caihong.mp3 </URL> <br/> </song> </P> <p> <song> <br/> <Name> Jay Chou-blue and white porcelain </Name> <br/> <URL> http://www.shinehid.com/media_ B /caihong.mp3 </URL> <br/> </song> </P> <p> <song> <br/> <Name> Jay Chou-qilixiang </Name> <br/> <URL> http://www.shinehid.com/media_ B /caihong.mp3 </URL> <br/> </song> </P> <p> </songitem>

 

Ii. Encapsulation

Package readxml <br/>{< br/> Import flash. events. *; <br/> Import flash.net. *; <br/> [event (name = "sendevent", type = "sendxmlevent")] <br/> public class getxml extends eventdispatcher <br/> {<br/> private var mylist: XML; <br/> Private Static Var OBJ: getxml = NULL; <br/> Public Function getxml () <br/> {// If (OBJ! = NULL) <br/> // new error ("sorry"); <br/>}</P> <p> Public Function loadxml (URL: string ): void <br/> {<br/> VaR _ Loader: urlloader = new urlloader (); <br/> _ loader. load (New URLRequest (URL); <br/> _ loader. addeventlistener (event. complete, handresult); <br/> _ loader. addeventlistener (ioerrorevent. io_error, errorhander); <br/>}</P> <p> private function handresult (Event: Event): void <br/>{< br/> mylistmediaxml(event.tar get. data); <br/> var S: sendxmlevent = new sendxmlevent ("sendevent"); <br/> S. myxml = mylist; <br/> dispatchevent (s); // <br/>}</P> <p> Public static function getinstance (): getxml <br/>{< br/> If (OBJ = NULL) <br/> OBJ = new getxml (); <br/> return OBJ; </P> <p >}</P> <p> private function errorhander (E: ioerrorevent ): void <br/>{</P> <p> trace ("cuowu"); <br/> throw new error ("cuowu "); </P> <p >}< br/>}

 

 

Operation:

Private function getlist (): void <br/>{</P> <p> obj. loadxml (".. /config/mysong. XML "); <br/> obj. addeventlistener ("sendevent", doing); <br/>}< br/> internal function doing (Event: sendxmlevent ): void <br/>{< br/> mylist = XML (event. myxml); <br/> trace (mylist); <br/>}

 

For now: Change it tomorrow

 

 

In flash, we first define an event class to return a parameter when loading XML.

Package <br/> {<br/> Import flash. events. event; <br/> public class loadevent extends event <br/>{< br/> Public static const loadxml: String = "loadxml"; <br/> Public var result: XML; <br/> Public Function loadevent (type: String, bubbles: Boolean = false, cancelable: Boolean = false) <br/>{< br/> super (type, false, false); <br/>}< br/> override public function clone (): event <br/>{< br/> return New loadevent (result ); <br/>}< br/>}

 

Customize a loadevent event. This event includes a parameter. The result type is XML.

Customize an event type: loadxml

 

2. Define a class for loading XML. This class is used to manage XML loading.

Package <br/> {</P> <p> Import flash.net. *; <br/> Import flash. events. *; <br/> public class xmlmanager extends eventdispatcher <br/> {<br/> Public Function xmlmanager () <br/>{</P> <p >}< br/> Public Function loadxml (Pach: string): void <br/>{< br/> var ld: urlloader = new urlloader (); <br/> lD. load (New URLRequest (Pach); <br/> lD. addeventlistener (event. complete, resulthandle); <br/> lD. addeventlistener (ioerrorevent. io_error, errorhandle); <br/>}</P> <p> private function resulthandle (E: Event): void <br/>{< br/> var myxml: xmlbeanxml(e.tar get. data); <br/> var sendevent: loadevent = new loadevent (loadevent. loadxml); <br/> sendevent. result = myxml; <br/> This. dispatchevent (sendevent); </P> <p >}< br/> private function errorhandle (E: Event ): void <br/>{< br/> throw new error ("loading failed "); </P> <p >}< br/>}

 

Method body: loadxml (PATH); after loading, call our event

VaR sendevent: loadevent = new loadevent (loadevent. loadxml );
Sendevent. Result = myxml;
This. dispatchevent (sendevent );

 

Because our public class xmlmanager extends eventdispatcher

Xmlmanager inherits the eventdispatcher class, which is the base class of the displayobject class. Therefore, we can call its event dispatch function.

The eventdispatcher class allows the display of any object in the list to be an event target. It also allows the use of the ieventdispatcher interface.

 

 

Officially call him

 

Package <br/> {<br/> Import flash. display. sprite; <br/> Import flash. events. *; <br/> public class main extends sprite <br/>{< br/> public function main () <br/>{< br/> var ld: xmlmanager = new xmlmanager (); <br/> lD. loadxml ("picture. XML "); <br/> lD. addeventlistener (loadevent. loadxml, resulthander); </P> <p >}< br/> private function resulthander (E: loadevent): void <br/>{< br/> trace (E. result); <br/>}< br/>}

 

In this way, we can use the encapsulated XML to return our XML Information.