@kevina952

Use java method in activity to create zip file, this is sample 

// Prepare a date-time stamp for the file name to ensure it is unique
java.util.Date today = new java.util.Date();
java.text.SimpleDateFormat formatter = new java.text.SimpleDateFormat("yyyy-MM-dd_HH-mm-ss");
String datenewformat = formatter.format(today);

int BUFFER = 2048;
// Prepare the filename
String exportFileName = tools.getParamValue("FileName");
if (exportFileName.indexOf(".") < 0)
{
	// Append the date and .zip.  If an extension is specified, it overrides this.
	exportFileName += ".zip";
}

// Prepare the temp directory path for saving
char sep = PRFile.separatorChar;
String sRulesMovePathName = tools.getProperty("pxProcess.pxServiceExportPath").getStringValue();

if (sRulesMovePathName.charAt(sRulesMovePathName.length() - 1) == sep)
{
	sRulesMovePathName = sRulesMovePathName.substring(0, sRulesMovePathName.length() - 1);
}
String targetDir = sRulesMovePathName + "/";


//Prepare csv file
String csvFileName = sRulesMovePathName + sep + FileName;
int lenRead = 0;
byte[] buf = new byte[1024];

// Prepare the zip file
PRFile targetZipFile = null;
if( targetDir.length() > 0 )
{
	 targetZipFile = new PRFile(targetDir);
	((PRFile) targetZipFile).mkdirs();
}

// Create the ZIP file
try
{
	targetZipFile = new PRFile(new PRFile(targetDir), exportFileName);
	java.util.zip.ZipOutputStream zoutLocal = new java.util.zip.ZipOutputStream(new PROutputStream(((PRFile) targetZipFile)));
  // Aquire the output stream
	java.util.zip.ZipOutputStream zout = (java.util.zip.ZipOutputStream) zoutLocal; 

	// Create the file in the zip archive
	zout.putNextEntry(new java.util.zip.ZipEntry(FileName));
	
	// Write the csv
  PRFile csvFile = new PRFile(csvFileName);
  PRInputStream fileIn = new PRInputStream(csvFile);
	while((lenRead = fileIn.read(buf)) > 0) {
     zout.write(buf,0, lenRead);
  }
  
	// Close the file
	zout.closeEntry();
  fileIn.close();
  zout.close();
  FileName = exportFileName;
  
  
}
catch (java.io.IOException ioe)
{
	// Should really set error messages on a property/page here rather than using oLog.infoForce(...).
	// Should really just abort processing here after reporting the error since if we cannot create the zip file we're totally done.
	oLog.infoForced("Exception encountered creating zip output file/stream: " + ioe.toString());

	StackTraceElement[] trace = ioe.getStackTrace();
	for(int i = 0; i < trace.length; i++)
	{
		oLog.infoForced(trace[i].toString());
	}
}