//保存retrofit下载下来的ResponseBody文件public static File writeResponseBodyToDisk(okhttp3.ResponseBody body, String name) {try {File myDir = new File(Environment.getExternalStorageDirectory().getPath() + File.separator + "YourRootFile");if (!myDir.exists()) {myDir.mkdirs();}File file = new File(myDir.getAbsolutePath(), name);LogUtil.i("file download: " + file.getAbsolutePath());InputStream inputStream = null;OutputStream outputStream = null;try {byte[] buffer = new byte[4096];inputStream = body.byteStream();outputStream = new FileOutputStream(file);int read;while ((read = inputStream.read(buffer)) != -1) {outputStream.write(buffer, 0, read);}outputStream.flush();return file;} catch (IOException e) {return file;} finally {if (inputStream != null) {inputStream.close();}if (outputStream != null) {outputStream.close();}}} catch (IOException e) {return null;}}

//解压下载的zip包public static void unZipFolder(String archive, String decompressDir) {try {BufferedInputStream bi;ZipFile zf = new ZipFile(archive);Enumeration e = zf.entries();while (e.hasMoreElements()) {ZipEntry ze2 = (ZipEntry) e.nextElement();String entryName = ze2.getName();String path = decompressDir + "/" + entryName;if (ze2.isDirectory()) {LogUtil.i("正在创建解压目录 - " + entryName);File decompressDirFile = new File(path);if (!decompressDirFile.exists()) {decompressDirFile.mkdirs();}} else {LogUtil.i("正在创建解压文件 - " + entryName);String fileDir = path.substring(0, path.lastIndexOf("/"));File fileDirFile = new File(fileDir);if (!fileDirFile.exists()) {fileDirFile.mkdirs();}BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(decompressDir + "/" + entryName));bi = new BufferedInputStream(zf.getInputStream(ze2));byte[] readContent = new byte[1024];int readCount = bi.read(readContent);while (readCount != -1) {bos.write(readContent, 0, readCount);readCount = bi.read(readContent);}bos.close();}}zf.close();} catch (IOException e) {LogUtil.i("faile to unzip file");}}

//清空下载的文件public static void clearFile(File file) {if (file.isFile()) {file.delete();return;}if (file.isDirectory()) {File[] childFile = file.listFiles();if (childFile == null || childFile.length == 0) {file.delete();return;}for (File f : childFile) {clearFile(f);}//file.delete();}}