文件管理类：
public class FileUtil { /** * 转换文件大小单位 */ public static String convertFileSize(long fileSize) { String newSize = ""; if (fileSize < 1024) { newSize = fileSize + "B"; } else if (fileSize >= 1024 && fileSize < 1024 * 1024) { newSize = String.valueOf(fileSize / 1024) + "KB"; } else { DecimalFormat format = new DecimalFormat("0.00"); String result = format.format((double) fileSize / (1024 * 1024)); newSize = result + "MB"; } return newSize; } /** * 根据文件扩展名获取打开类型 */ private static String getMIMEType(File f) { String type = ""; String fileName = f.getName(); String end = fileName.substring(fileName.lastIndexOf(".") + 1, fileName.length()).toLowerCase(); if (end.equals("doc") || end.equals("docx")) { type = "application/msword"; } else if (end.equals("xls") || end.equals("xlsx")) { type = "application/vnd.ms-excel"; } else if (end.equals("ppt") || end.equals("pptx")) { type = "application/vnd.ms-powerpoint"; } else if (end.equals("txt") || end.equals("log") || end.equals("xml")) { type = "text/plain"; } else if (end.equals("pdf")) { type = "application/pdf"; } else if (end.equals("rtf")) { type = "application/rtf"; } else if (end.equals("m4a") || end.equals("mp3") || end.equals("mid") || end.equals("xmf") || end.equals("ogg") || end.equals("wav")) { type = "audio/*"; } else if (end.equals("3gp") || end.equals("mp4") || end.equals("avi")) { type = "video/*"; } else if (end.equals("jpg") || end.equals("gif") || end.equals("png") || end.equals("jpeg") || end.equals("bmp") || end.equals("ico")) { type = "image/*"; } else if (end.equals("apk")) { type = "application/vnd.android.package-archive"; } else if (end.equals("chm")) { type = "application/x-chm"; } else if (end.equals("htm") || end.equals("html")) { type = "text/html"; } return type; } /** * 按文件扩展名设置文件图标 */ public static Bitmap getFileIcon(Context context, File file) { if (file.isDirectory()) { return BitmapFactory.decodeResource(context.getResources(), R.drawable.filetype_folder); } String fileName = file.getName(); Bitmap bm = null; String end = fileName.substring(fileName.lastIndexOf(".") + 1, fileName.length()).toLowerCase(); if (end.equals("m4a") || end.equals("mp3") || end.equals("mid") || end.equals("xmf") || end.equals("ogg") || end.equals("wav")) { bm = BitmapFactory.decodeResource(context.getResources(), R.drawable.filetype_audio); } else if (end.equals("apk")) { bm = BitmapFactory.decodeResource(context.getResources(), R.drawable.filetype_apk); } else if (end.equals("text") || end.equals("txt")) { bm = BitmapFactory.decodeResource(context.getResources(), R.drawable.filetype_txt); } else if (end.equals("jpg") || end.equals("gif") || end.equals("png") || end.equals("jpeg") || end.equals("bmp") || end.equals("ico")) { bm = BitmapFactory.decodeResource(context.getResources(), R.drawable.filetype_image); } else if (end.equals("rar") || end.equals("zip")) { bm = BitmapFactory.decodeResource(context.getResources(), R.drawable.filetype_rar); } else if (end.equals("jar")) { bm = BitmapFactory.decodeResource(context.getResources(), R.drawable.filetype_unknown); } else if (end.equals("rmvb") || end.equals("avi") || end.equals("mp4")) { bm = BitmapFactory.decodeResource(context.getResources(), R.drawable.filetype_video); } else if (end.equals("doc") || end.equals("docx")) { bm = BitmapFactory.decodeResource(context.getResources(), R.drawable.filetype_word); } else if (end.equals("xls") || end.equals("xlsx")) { bm = BitmapFactory.decodeResource(context.getResources(), R.drawable.filetype_excel); } else if (end.equals("ppt") || end.equals("pptx")) { bm = BitmapFactory.decodeResource(context.getResources(), R.drawable.filetype_ppt); } else if (end.equals("pdf")) { bm = BitmapFactory.decodeResource(context.getResources(), R.drawable.filetype_pdf); } else if (end.equals("rtf")) { bm = BitmapFactory.decodeResource(context.getResources(), R.drawable.filetype_rtf); } else if (end.equals("log")) { bm = BitmapFactory.decodeResource(context.getResources(), R.drawable.filetype_log); } else { bm = BitmapFactory.decodeResource(context.getResources(), R.drawable.filetype_unknown); } return bm; } /** * 按类型打开文件 **/ public static void openFile(Context context, File f) { if (f.length() > 0) { try { Intent intent = new Intent("android.intent.action.VIEW"); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); intent.addCategory("android.intent.category.DEFAULT"); String type = getMIMEType(f); intent.setDataAndType(Uri.fromFile(f), type); context.startActivity(intent); } catch (Exception e) { Toast.makeText(context, context.getString(R.string.filemanager_nosupportfile), Toast.LENGTH_SHORT); e.printStackTrace(); } } else { Toast.makeText(context, context.getString(R.string.filemanager_nosupportfile), Toast.LENGTH_SHORT); } } /** * SD卡是否就绪 */ public static boolean sdCardIsExsit() { return Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED); } }
文件压缩、解压类：
public class ZipUtil { private static boolean isCancel; public static void setCancel(boolean isCancel1) { isCancel = isCancel1; } /** * 压缩 * * @param srcFilePath 待压缩的目录或文件路径 * @param tarFilePath 压缩后的文件路径 */ public static void compress(String srcFilePath, String tarFilePath, ThreadCallBack threadCallBack) throws IOException { isCancel = false; File folder = new File(srcFilePath); if (folder.exists()) { List<File> fileList = getSubFiles(new File(srcFilePath)); ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(tarFilePath)); ZipEntry ze = null; File file = null; byte[] buf = new byte[1024]; int len = 0; String fileName = null; for (int i = 0; i < fileList.size() && !isCancel; i++) { file = fileList.get(i); //回调外部，用于更新进度条 threadCallBack.callBack(file.getName()); if (file.getPath().length() > srcFilePath.length()) { fileName = file.getPath().substring(srcFilePath.length() + 1); } else { fileName = file.getName(); } //文件实体 ze = new ZipEntry(fileName); ze.setSize(file.length()); ze.setTime(file.lastModified()); //将实体加入压缩包中 zos.putNextEntry(ze); InputStream is = new BufferedInputStream(new FileInputStream(file)); while ((len = is.read(buf, 0, 1024)) != -1) { zos.write(buf, 0, len); } is.close(); } zos.close(); if (!isCancel) { threadCallBack.callBack("end"); } } else { throw new IOException("this folder isnot exist!"); } } /** * 取得指定目录下的所有文件列表，包括子目录. * * @param baseDir 指定的目录或文件,如果是文件就加入列表，目录就继续取下级子文件 * @return 文件列表 */ private static List<File> getSubFiles(File baseDir) { List<File> files = new ArrayList<File>(); if (!baseDir.isDirectory()) { files.add(baseDir); } else { File[] tmp = baseDir.listFiles(); for (int i = 0; i < tmp.length; i++) { if (tmp[i].isFile()) { files.add(tmp[i]); } if (tmp[i].isDirectory()) { files.addAll(getSubFiles(tmp[i])); } } } return files; } /** * 解压缩 * * @param srcFilePath 待解压的文件路径 * @param tarFilePath 解压后的目录或文件路径 */ public static void uncompress(String srcFilePath, String tarFilePath, ThreadCallBack threadCallBack) throws IOException { isCancel = false; ZipFile zipFile = new ZipFile(srcFilePath); Enumeration zipList = zipFile.getEntries(); ZipEntry ze = null; byte[] buf = new byte[1024]; while (zipList.hasMoreElements() && !isCancel) { ze = (ZipEntry) zipList.nextElement(); if (ze.isDirectory()) { continue; } //回调外部更新进度条 threadCallBack.callBack(ze.getName()); OutputStream out = new BufferedOutputStream(new FileOutputStream(mkdirs(tarFilePath, ze.getName()))); InputStream in = new BufferedInputStream(zipFile.getInputStream(ze)); int readLen = 0; while ((readLen = in.read(buf, 0, 1024)) != -1) { out.write(buf, 0, readLen); } in.close(); out.close(); } zipFile.close(); if (!isCancel) { threadCallBack.callBack("end"); } } /** * 创建目录或文件 * * @param baseDir 解压后的目录或文件路径 * @param itemName ZipEntry中的name * @return 文件 */ private static File mkdirs(String baseDir, String itemName) { File file = new File(baseDir, itemName); if (!file.getParentFile().exists()) { file.getParentFile().mkdirs(); } return file; } }
