Android获取指定文件大小，android文件大小, /**

Android获取指定文件大小，android文件大小, /**

    /**          * 获取指定文件大小           * @param f           * @return           * @throws Exception 　　          */          public static long getFileSize(File file) throws Exception {              long size = 0;              if (file.exists()) {                  FileInputStream fis = null;                  fis = new FileInputStream(file);                  size = fis.available();              } else {                  file.createNewFile();                  Log.e("获取文件大小", "文件不存在!");              }              return size;          }  

    /**          * 获取指定文件夹          * @param f          * @return          * @throws Exception          *           */          public static long getFileSizes(File f) throws Exception {              long size = 0;              File flist[] = f.listFiles();              for (int i = 0; i < flist.length; i++) {                  if (flist[i].isDirectory()) {                      size = size + getFileSizes(flist[i]);                  } else {                      size = size + getFileSize(flist[i]);                  }              }              return size;          }  

    /**          * 转换文件大小          * @param fileS          * @return          *           */          public static String FormetFileSize(long fileS) {              DecimalFormat df = new DecimalFormat("#.00");              String fileSizeString = "";              String wrongSize = "0B";              if (fileS == 0) {                  return wrongSize;              }              if (fileS < 1024) {                  fileSizeString = df.format((double) fileS) + "B";              } else if (fileS < 1048576) {                  fileSizeString = df.format((double) fileS / 1024) + "KB";              } else if (fileS < 1073741824) {                  fileSizeString = df.format((double) fileS / 1048576) + "MB";              } else {                  fileSizeString = df.format((double) fileS / 1073741824) + "GB";              }              return fileSizeString;          }