关于ksoap连接webService的问题

public byte[]  getTranferFileString(String filename,int ImageType,int index)
	{
		String fileContent = "";
		String fileContent1="";
		byte[] data=null;
		//参数表示为 WebService命名空间，第二个参数为WebService里面的方法名称
		SoapObject soapObject = new SoapObject(targetNameSpace,getTranferFileStringWithEncode);
		//soapObject.addProperty("str", "fuck it");
		soapObject.addProperty("ImageType",ImageType );
		soapObject.addProperty("index", index);
		SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);

	    //增加参数
        
		envelope.dotNet = false;
		envelope.setOutputSoapObject(soapObject);
		HttpTransportSE httpTranstation=new HttpTransportSE(WSDL);
		
		try {
			//使用call 方法调用webservice方法
			httpTranstation.call(null, envelope);
			//httpTranstation.call(null, envelope);
			Object  result =envelope.bodyIn;//getResponse();
			
			 fileContent=result.toString();
			 fileContent1=fileContent.substring(40, fileContent.length());
			//fileContent=result.toString();
			
			//String strFile="downfromserive"+Math.random()+".png";
			
		     data=FileOperate.jiemi(fileContent1);
			
			//FileOperate.xmlString2Bin(fileContent1, new File(filename));
			
			 //  也可以通过下面方式获得str
		   	 //  SoapPrimitive  result = (SoapPrimitive ) envelope.getResponse();
		     //	str=result.toString();
		     //   直指value字符串值
		} catch (IOException e) {
			e.printStackTrace();
			Log.i("AppClient", "UpAndDown.java"+e.toString());
		} catch (XmlPullParserException e) {
			
			e.printStackTrace();
			Log.i("AppClient", "UpAndDown.java"+e.toString());
		}
		return data;
	}

此处要注意的一点是，如果webservice的返回值是byte类型的，应该用SoapObject result =(SoapObject)envelope.bodyIn;//getResponse(); 如果是String类型的则用 Object result=envelope.bodyIn; 否则会报错！