Android如何解压assets目录下的压缩包文件

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/yushuangping/article/details/85013230

1.工具类 

/**
 * Created by YuShuangPing on 2018/12/15.
 */
public class ZipUtils {
    public static final String TAG = "ZIP";

    public ZipUtils() {

    }



    /**
     * 解压assets目录下的zip到指定的路径
     * @param zipFileString ZIP的名称，压缩包的名称：xxx.zip
     * @param outPathString 要解压缩路径
     * @throws Exception
     */
    public static void UnZipAssetsFolder(Context context, String zipFileString, String
                                                 outPathString) throws Exception {
        ZipInputStream inZip = new ZipInputStream(context.getAssets().open(zipFileString));
        ZipEntry zipEntry;
        String szName = "";
        while ((zipEntry = inZip.getNextEntry()) != null) {
            szName = zipEntry.getName();
            if (zipEntry.isDirectory()) {
                //获取部件的文件夹名
                szName = szName.substring(0, szName.length() - 1);
                File folder = new File(outPathString + File.separator + szName);
                folder.mkdirs();
            } else {
                Log.e(TAG, outPathString + File.separator + szName);
                File file = new File(outPathString + File.separator + szName);
                if (!file.exists()) {
                    Log.e(TAG, "Create the file:" + outPathString + File.separator + szName);
                    file.getParentFile().mkdirs();
                    file.createNewFile();
                }
                // 获取文件的输出流
                FileOutputStream out = new FileOutputStream(file);
                int len;
                byte[] buffer = new byte[1024];
                // 读取（字节）字节到缓冲区
                while ((len = inZip.read(buffer)) != -1) {
                    // 从缓冲区（0）位置写入（字节）字节
                    out.write(buffer, 0, len);
                    out.flush();
                }
                out.close();
            }
        }
        inZip.close();
    }
}

2.在Activity中调用：

try {
            //从assets目录下解压zip文件
            ZipUtils.UnZipAssetsFolder(this,"download.zip", unZipPath);
            showHtml();
        } catch (Exception e) {
            e.printStackTrace();
        }