I have written an Android application which downloads pdf files through web service. I am using kSoap2 android library to parse the response of web service which basically contains file name & file data. I have written following code. Please review & tell how to increase the speed I think there is some small defect in code which reduces the speed. I am using version 2.5.1 of kSoap2.public void downloadPdfFiles(File fileDocsDir, int noOfFiles)            throws NullPointerException, SoapFault, XmlPullParserException,            FileNotFoundException, IOException, Exception {        System.gc();        // Download files from web service and save them in the folder.        soapObject = new SoapObject(NAMESPACE, METHOD_NAME);        soapObject.addProperty(startingFile, noOfFiles);        soapObject.addProperty(deviceId, deviceId);        soapObject.addProperty(loginId, loginId);        soapObject.addProperty(byoinId, 1);        envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);        envelope.setOutputSoapObject(soapObject);        // Calling the web service        System.gc();        androidHttpTransport = new HttpTransportSE(URL);        androidHttpTransport.call(SOAP_ACTION, envelope);        // Getting Response through xml mainly generated as soap:reponse.        responseBean = (SoapObject) envelope.getResponse();        // Array of PDFInfoBean.        list = (SoapObject) responseBean.getProperty(0);        FileOutputStream outputStream = null;        BufferedOutputStream bufferedOutputStream = null;        // Get Individual PDF Details from Array.        SoapObject pdfDetails = null;        mIncrement = noOfFiles;        // Log.i(Increment Values, String.valueOf(mIncrement));        File pdfFile = null;        for (int i = 0; i < list.getPropertyCount(); i++) {            pdfDetails = (SoapObject) list.getProperty(i);            // Get PDF File Name.            pdfDocName = pdfDetails.getProperty(1).toString();            Log.i(TAG, File Name:  + pdfDocName);            // Check for last file.            if (pdfDocName.equalsIgnoreCase(EOF)) {                mFlag = false;                break;            }            // Creating PDF File.            pdfFile = new File(fileDocsDir, pdfDocName);            // Writing PDF file received through web service.            if (pdfFile.exists()) {                Log.i(TAG, pdfFile.getName() +  File Already Exists);            } else {                outputStream = new FileOutputStream(pdfFile);                bufferedOutputStream = new BufferedOutputStream(outputStream);                bufferedOutputStream.write(Base64Coder.decode(pdfDetails                        .getProperty(0).toString()));                mIncrement = mIncrement + 1;                bufferedOutputStream.close();                outputStream.close();                bufferedOutputStream = null;                outputStream = null;            }            pdfDetails = null;            pdfDocName = null;            pdfFile = null;            System.gc();        }        soapObject = null;        envelope = null;        responseBean = null;        list = null;        androidHttpTransport = null;        System.gc();    }
How to increase download speed using the following method?
java;android;soap