Android 解压缩功能

主要用到zip：

import java.util.Enumeration;
import java.util.zip.CRC32;
import java.util.zip.CheckedOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipOutputStream;

解压文件：

/**
     * 解压缩功能. 将zipPath文件 解压到folderPath目录下.
     *
     * @param zipFile zip文件
     * @param destDir 解压到的文件路径
     * @throws java.io.IOException
     */
    public static void upZipFile(File zipFile, String destDir) {
        File pathFile = new File(destDir + "/");
        if (!pathFile.exists()) {
            pathFile.mkdirs();
        }

        try {
            ZipFile zip = new ZipFile(zipFile);

            for (Enumeration<?> entries = zip.entries(); entries.hasMoreElements(); ) {
                ZipEntry entry = (ZipEntry) entries.nextElement();
                String zipEntryName = entry.getName();

                InputStream in = zip.getInputStream(entry);
                String outPath = (destDir + "/" + zipEntryName).replaceAll("\*", "/");

                // 判断路径是否存在,不存在则创建文件路径
                File file = new File(outPath.substring(0, outPath.lastIndexOf('/')));
                if (!file.exists()) {
                    file.mkdirs();
                }
                // 判断文件全路径是否为文件夹,如果是上面已经上传,不需要解压
                if (new File(outPath).isDirectory()) {
                    continue;
                }
                // 输出文件路径信息
                System.out.println(outPath);

                OutputStream out = new FileOutputStream(outPath);
                byte[] buf1 = new byte[1024];
                int len;
                while ((len = in.read(buf1)) > 0) {
                    out.write(buf1, 0, len);
                }
                in.close();
                out.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

压缩文件：

（1）首先要声明个压缩类：

public static class ZipCompressor {
        static final int BUFFER = 1024 * 128;

        private File zipFile;

        public ZipCompressor(String pathName) {
            zipFile = new File(pathName);
        }

        public void compress(String srcPathName) {
            File file = new File(srcPathName);
            if (!file.exists())
                throw new RuntimeException(srcPathName + "不存在！");
            try {
                FileOutputStream fileOutputStream = new FileOutputStream(zipFile);
                CheckedOutputStream cos = new CheckedOutputStream(fileOutputStream, new CRC32());
                ZipOutputStream out = new ZipOutputStream(cos);
                String basedir = "";
                compress(file, out, basedir);
                out.close();
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }

        private void compress(File file, ZipOutputStream out, String basedir) {
            /* 判断是目录还是文件 */
            if (file.isDirectory()) {
                System.out.println("压缩：" + basedir + file.getName());
                this.compressDirectory(file, out, basedir);
            } else {
                System.out.println("压缩：" + basedir + file.getName());
                this.compressFile(file, out, basedir);
            }
        }

        /** 压缩一个目录 */
        private void compressDirectory(File dir, ZipOutputStream out, String basedir) {
            if (!dir.exists())
                return;

            File[] files = dir.listFiles();
            for (int i = 0; i < files.length; i++) {
                /* 递归 */
                compress(files[i], out, basedir + dir.getName() + "/");
            }
        }

        /** 压缩一个文件 */
        private void compressFile(File file, ZipOutputStream out, String basedir) {
            if (!file.exists()) {
                return;
            }
            try {
                BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));
                ZipEntry entry = new ZipEntry(basedir + file.getName());
                out.putNextEntry(entry);
                int count;
                byte data[] = new byte[BUFFER];
                while ((count = bis.read(data, 0, BUFFER)) != -1) {
                    out.write(data, 0, count);
                }
                bis.close();
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
    }

压缩类使用：

public static void compress(String srcPathName, String zipPathName) {
    ZipCompressor zipCompressor = new ZipCompressor(zipPathName);
    zipCompresspr.compress(srcPathName);
}