AIR程序多开

AIR应用通常不能像QQ那样能进行多开操作。

 

为了让一个用AIR做的客户端能实现多任务，我找到得办法是运行程序时自动修改配置文件的id标签内的内容。

 

然后再关闭程序时又必须还原成原有的id，因为只有id一致才能实现更新功能。

 

 

主程序：multiapp.mxml

    <?xml version="1.0" encoding="utf-8"?>      <s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009"                              xmlns:s="library://ns.adobe.com/flex/spark"                              xmlns:mx="library://ns.adobe.com/flex/mx"                             creationComplete="windowedapplication1_creationCompleteHandler(event)">          <fx:Script>              <![CDATA[                  import flash.filesystem.File;                  import flash.filesystem.FileMode;                  import flash.filesystem.FileStream;                                    import mx.events.FlexEvent;                  import mx.formatters.DateFormatter;                                    private var oldid:String;                  private var reg:RegExp = /<id>.*<\/id>/;                                    protected function windowedapplication1_creationCompleteHandler(event:FlexEvent):void                  {                      var df:DateFormatter = new DateFormatter();                      df.formatString = "YYYYMMDDHHNNSS";                      var time:String = df.format(new Date());                      var newid:String = "<id>com.roy"+time+"</id>";                                            var f:File =new File(File.applicationDirectory.resolvePath(                          "META-INF/AIR/application.xml").nativePath);                      var fs:FileStream = new FileStream();                        fs.open(f,FileMode.READ);                            var str:String = new String(fs.readUTFBytes(fs.bytesAvailable));                      oldid = str.match(reg).toString();                      str = str.replace(reg,newid);                        fs.open(f,FileMode.WRITE);                      fs.writeUTFBytes(str);                       fs.close();                                            label.text = newid;                                            //有多个在运行的程序时只关闭一个运行程序就无法再打开新程序                      //必须监听系统最后一个相同程序关闭时，才能初始化id                      //解决办法：                      //记录运行前id,若为初始ID则在关闭该程序时初始化id,否则不操作                                            if(oldid == "<id>com.roy</id>")                      {                          this.addEventListener(Event.CLOSE,returnId);                      }                  }                                    protected function returnId(e:Event):void                  {                      var f:File =new File(File.applicationDirectory.resolvePath(                          "META-INF/AIR/application.xml").nativePath);                      var fs:FileStream = new FileStream();                        fs.open(f,FileMode.READ);                            var str:String = new String(fs.readUTFBytes(fs.bytesAvailable));                      str = str.replace(reg,oldid);                        fs.open(f,FileMode.WRITE);                      fs.writeUTFBytes(str);                       fs.close();                  }                                ]]>          </fx:Script>                    <s:VGroup gap="20">              <s:Label text="已将配置文件id更改为：" color="0xff0000" fontSize="20"/>              <s:Label id="label" color="0x0000ff" fontSize="20"/>          </s:VGroup>      </s:WindowedApplication>  

此程序中配置文件multiapp-app.mxml中，id标签必须为<id>com.roy</id>。

转载：http://mad-roy.iteye.com/blog/1225788