Downloading and Resuming File Transfers via FTP: Which Java Library Works Best for Android?

FTP Library for Android Development

Q: I'm in search of a Java library for Android that enables downloading and resuming file transfers from an FTP server. Can anyone provide insights into such an option? I've come across numerous client applications, but not independent libraries.

A: You could utilize Apache Commons FTP, which offers a comprehensive FTP implementation. Here's an example that demonstrates its usage:

<code class="java">FTPClient ftpClient = new FTPClient();
ftpClient.connect(InetAddress.getByName(server));
ftpClient.login(user, password);
ftpClient.changeWorkingDirectory(serverRoad);
ftpClient.setFileType(FTP.BINARY_FILE_TYPE);

BufferedInputStream buffIn = null;
buffIn = new BufferedInputStream(new FileInputStream(file));
ftpClient.enterLocalPassiveMode();
ftpClient.storeFile("test.txt", buffIn);
buffIn.close();
ftpClient.logout();
ftpClient.disconnect();</code>

This code establishes a connection to the FTP server, navigates to the desired directory, sets the file transfer type, enters passive mode, and initiates the file transfer operation.

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