Android file compression and decompression tools

public class ZipUtils {
    public static void compressFolder(Activity activity, String sourcePath, String zipFile) throws IOException {
        File folder = new File(sourcePath);
        File zipPath = new File(zipFile);
        if (()) {
            ();
        }
 
        // Create an output stream and specify the path to the ZIP file to be generated        try (ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(zipFile))) {
            addFilesToZip(folder, (), zos);
 
            ("The folder has been successfully compressed to " + zipFile);
            (activity, "Compression is complete", Toast.LENGTH_SHORT).show();
        } catch (IOException e) {
            throw new RuntimeException("Cannot compress folder into ZIP file", e);
        }
    }
 
    private static void addFilesToZip(File file, String parentName, ZipOutputStream zos) throws IOException {
        if (!()) return;
 
        for (File child : ()) {
            if (()) {
                addFilesToZip(child, parentName + "/" + (), zos);
            } else {
                byte[] buffer = new byte[1024];
 
                // Get the path name of the current file relative to the source folder                String entryName = parentName + "/" + ();
 
                // Add new entry to ZIP file                (new ZipEntry(entryName));
 
                // Read the file content and write to the ZIP file                try (InputStream is = new FileInputStream(child)) {
                    int length;
                    while ((length = (buffer)) > 0) {
                        (buffer, 0, length);
                    }
                } finally {
                    ();
                }
            }
        }
    }
 
    public static void Unzip(String zipFile, String targetDir) {
        ("lz>>","zipFile:"+zipFile+" targetDir:"+targetDir);
        int BUFFER = 4096; //We use 4KB of the buffer here.        String strEntry; //Save the entry name of each zip 
        try {
            BufferedOutputStream dest = null; //Buffer output stream            FileInputStream fis = new FileInputStream(zipFile);
            ZipInputStream zis = new ZipInputStream(new BufferedInputStream(fis));
            ZipEntry entry; //Instance of each zip entry 
            while ((entry = ()) != null) {
 
                try {
                    ("Unzip: ","="+ entry);
                    int count;
                    byte data[] = new byte[BUFFER];
                    strEntry = ();
 
                    File entryFile = new File(targetDir + strEntry);
                    File entryDir = new File(());
                    if (!()) {
                        ();
                    }
 
                    FileOutputStream fos = new FileOutputStream(entryFile);
                    dest = new BufferedOutputStream(fos, BUFFER);
                    while ((count = (data, 0, BUFFER)) != -1) {
                        (data, 0, count);
                    }
                    ();
                    ();
                } catch (Exception ex) {
                    ();
                }
            }
            ();
            ("Unzip: ","="+ "Finish");
        } catch (Exception cwj) {
            ();
        }
    }

               File appDir = getFilesDir();
                String filePath = appDir+“”";//The file path that needs to be compressed                String zipWalletfile = ();
                try {
                //zipWalletfile + "/" compressed file name                    (, filePath , zipWalletfile + "/");
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }

   File zipfile = ();
        String zipWalletfile = ();//The file to be decompressed        String unzipPath=getFilesDir().getPath();Unzip the file path
        (zipWalletfile + "/",unzipPath+"/");