Android code block for FTP needed

I'm creating an Android FTP client and I need someone to create blocks of code that I can use in Google App Inventor to do the following: 1. Connect to an FTP site 2. Upload a file to the FTP space 3. Download a file from the FTP space 4. List the files/folders on an FTP server given a certain folder 5. Disconnect from an FTP site The blocks need to be encorporated into App Inventor so that I can use them in my App. Thanks for bidding! Rob