安卓ftp解压

import android.os.AsyncTask;
import android.util.Log;

import org.apache.commons.net.ftp.FTPClient;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.zip.ZipInputStream;

public class FTPDownloadAndUnzipTask extends AsyncTask<String, Void, Void> {

    @Override
    protected Void doInBackground(String... params) {
        String server = params[0];
        int port = Integer.parseInt(params[1]);
        String user = params[2];
        String pass = params[3];
        String remoteFilePath = params[4];
        String localFilePath = params[5];

        FTPClient ftpClient = new FTPClient();
        try {
            ftpClient.connect(server, port);
            ftpClient.login(user, pass);
            ftpClient.enterLocalPassiveMode();

            File localFile = new File(localFilePath);
            FileOutputStream fos = new FileOutputStream(localFile);
            InputStream is = ftpClient.retrieveFileStream(remoteFilePath);
            byte[] bytesArray = new byte[4096];
            int bytesRead = -1;
            while ((bytesRead = is.read(bytesArray)) != -1) {
                fos.write(bytesArray, 0, bytesRead);
            }
            fos.close();
            is.close();
            ftpClient.completePendingCommand();

            unzipFile(localFilePath, "/path/to/unzip/directory");
        } catch (Exception e) {
            Log.e("FTPDownloadAndUnzip", "Error: " + e.getMessage());
        } finally {
            try {
                if (ftpClient.isConnected()) {
                    ftpClient.logout();
                    ftpClient.disconnect();
                }
            } catch (Exception e) {
                Log.e("FTPDownloadAndUnzip", "Error: " + e.getMessage());
            }
        }
        return null;
    }

    private void unzipFile(String zipFilePath, String destDirectory) throws Exception {
        File destDir = new File(destDirectory);
        if (!destDir.exists()) {
            destDir.mkdir();
        }
        ZipInputStream zipIn = new ZipInputStream(new FileInputStream(zipFilePath));
        ZipEntry entry = zipIn.getNextEntry();
        while (entry != null) {
            String filePath = destDirectory + File.separator + entry.getName();
            if (!entry.isDirectory()) {
                extractFile(zipIn, filePath);
            } else {
                File dir = new File(filePath);
                dir.mkdir();
            }
            zipIn.closeEntry();
            entry = zipIn.getNextEntry();
        }
        zipIn.close();
    }

    private void extractFile(ZipInputStream zipIn, String filePath) throws Exception {
        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(filePath));
        byte[] bytesIn = new byte[4096];
        int read = 0;
        while ((read = zipIn.read(bytesIn)) != -1) {
            bos.write(bytesIn, 0, read);
        }
        bos.close();
    }
}