你想要的这都有-Android文件工具类FileUtils

比眉伴天荒 2022-07-26 01:44 171阅读 0赞

# 包含所有关于文件处理的工具类 #

/\*\*  
\* 对文件处理的工具类  
\*/  
public class FileUtils \{  
/\*\*  
\* 获取可以使用的缓存目录(默认目录名/itlanbaoApp/)  
\* @param context  
\* @return  
\*/  
public static File getDiskCacheDir(Context context) \{  
return getDiskCacheDir(context, FileConstants.RESOURCE\_DIRECTORY);  
\}

/**
     * 获取可以使用的缓存目录
     * @param context
     * @param uniqueName 目录名称
     * @return
     */
    public static File getDiskCacheDir(Context context, String uniqueName) {
        final String cachePath = checkSDCard() ? getExternalCacheDir(context).getPath() : getAppCacheDir(context);
    
        File cacheDirFile = new File(cachePath);
        if (!cacheDirFile.exists()) {
            cacheDirFile.mkdirs();
        }
    
        return cacheDirFile;
    }
    
    /**
     * 获取程序外部的缓存目录
     * @param context
     * @return
     */
     public static File getExternalCacheDir(Context context) {
         // 这个sd卡中文件路径下的内容会随着，程序卸载或者设置中清除缓存后一起清空
         final String cacheDir = "/Android/data/" + context.getPackageName() + "/cache/";
         return new File(Environment.getExternalStorageDirectory().getPath() + cacheDir);
     }
    
     /**
      * 获取文件路径空间大小
      * @param path
      * @return
      */
     public static long getUsableSpace(File path) {
         try{
              final StatFs stats = new StatFs(path.getPath());
              return (long) stats.getBlockSize() * (long) stats.getAvailableBlocks();
         }catch (Exception e) {
             e.printStackTrace();
             return -1;
         }
    
     }
    
     /**
      * 空间大小单位格式化
      * @param size
      * @return
      */
     public static String formatSize(long size) {

// Formatter.formatFileSize()  
String suffix = null;  
float fSize=0;

if (size >= 1024) {
             suffix = "KB";
             fSize=size / 1024;
             if (fSize >= 1024) {
                 suffix = "MB";
                 fSize /= 1024;
             }
             if (fSize >= 1024) {
                 suffix = "GB";
                 fSize /= 1024;
             }
         } else {
             fSize = size;
         }
    
         java.text.DecimalFormat df = new java.text.DecimalFormat("#0.00");
         StringBuilder resultBuffer = new StringBuilder(df.format(fSize));
         if (suffix != null)
             resultBuffer.append(suffix);
         return resultBuffer.toString();
     }
    
    /**
     * 检查SD卡是否存在
     *
     * @return
     */
    public static boolean checkSDCard() {
        final String status = Environment.getExternalStorageState();
        if (Environment.MEDIA_MOUNTED.equals(status)) {
            return true;
        }
        return false;
    }
    
    /**
     * 获取安装在用户手机上的com.itlanbao.app下的files目录
     *
     * @return files path
     */
    public static String getAppFilesDir(Context context) {
        return context.getFilesDir().getAbsolutePath();
    }
    
    /**
     * 获取安装在用户手机上的com.itlanbao.yyapp下的cache目录
     *
     * @return cache path
     */
    public static String getAppCacheDir(Context context) {
        return context.getCacheDir().getPath();
    }
    
    /**
     * 创建app主目录
     *
     * @return boolean
     */
    public static boolean checkFileDirectory(Context context) {
        final File resDir = FileUtils.getDiskCacheDir(context);
        if (!resDir.exists()) {
            return resDir.mkdirs();
        }
        return true;
    }
    
    /**
     * 创建缓存文件夹
     */
    public static void initCacheFile(Context context) {
    
        if (LogUtils.DEBUG) {
            LogUtils.v("initCacheFile");
        }
    
        final String cacheDir = FileUtils.getDiskCacheDir(context).getAbsolutePath();
    
        final String imageDirPath = cacheDir + FileConstants.CACHE_IMAGE_DIR;
        final File imageFileDir = new File(imageDirPath);
        if (!imageFileDir.exists()) {
            boolean isOk = imageFileDir.mkdirs();
            if (LogUtils.DEBUG) {
                LogUtils.v(imageDirPath + " 文件夹创建isOk" + isOk);
            }
        }
    
        final String audioDirPath = cacheDir + FileConstants.CACHE_AUDIO_DIR;
        final File audioFileDir = new File(audioDirPath);
        if (!audioFileDir.exists()) {
            boolean isOk = audioFileDir.mkdirs();
            if (LogUtils.DEBUG) {
                LogUtils.v(audioDirPath + " 文件夹创建isOk" + isOk);
            }
        }
    
        final String messageDirPath = cacheDir + FileConstants.CACHE_MESSAGE_DIR;
        final File messageFileDir = new File(messageDirPath);
        if (!messageFileDir.exists()) {
            boolean isOk = messageFileDir.mkdirs();
            if (LogUtils.DEBUG) {
                LogUtils.v(imageDirPath + " 文件夹创建isOk" + isOk);
            }
        }
    }
    
    
    /**
     * 读取文件
     *
     * @param sFileName
     * @return
     */
    public static String readFile(String sFileName) {
        if (TextUtils.isEmpty(sFileName)) {
            return null;
        }
    
        final StringBuffer sDest = new StringBuffer();
        final File f = new File(sFileName);
        if (!f.exists()) {
            return null;
        }
        try {
            FileInputStream is = new FileInputStream(f);
            BufferedReader br = new BufferedReader(new InputStreamReader(is));
    
            try {
                String data = null;
                while ((data = br.readLine()) != null) {
                    sDest.append(data);
                }
            } catch (IOException ioex) {
                if (LogUtils.DEBUG) {
                    LogUtils.e(ioex);
                }
            } finally {
                is.close();
                is = null;
                br.close();
                br = null;
            }
        } catch (Exception ex) {
            if (LogUtils.DEBUG) {
                LogUtils.e(ex);
            }
        } catch (OutOfMemoryError ex) {
            if (LogUtils.DEBUG) {
                ex.printStackTrace();
            }
        }
        return sDest.toString().trim();
    }
    
    /**
     * 从assets 文件夹中获取文件并读取数据
     *
     * @param context
     * @param fileName
     * @param isEncoding
     * @return
     */
    public static String getFromAssets(Context context, String fileName ) {
        String result = "";
        try {
            final InputStream in = context.getResources().getAssets()
                    .open(fileName);
            // 获取文件的字节数
            final int lenght = in.available();
            // 创建byte数组
            byte[] buffer = new byte[lenght];
            // 将文件中的数据读到byte数组中
            in.read(buffer);
    
            result = EncodingUtils.getString(buffer, "UTF-8");
            in.close();
            buffer = null;
        } catch(FileNotFoundException e) {
            e.printStackTrace();
        } catch (Exception e) {
            if (LogUtils.DEBUG) {
                LogUtils.e(e);
            }
        }
        return result;
    }
    
    /**
     * 保存文件
     *
     * @param sToSave
     * @param sFileName
     * @param isAppend
     * @return
     */
    public static boolean writeStringToFile(String content, String fileName, boolean isAppend) {
        return writeStringToFile(content, "", fileName, isAppend);
    }
    
    public static boolean writeStringToFile(String content,
            String directoryPath, String fileName, boolean isAppend) {
        if (!TextUtils.isEmpty(content)) {
            if (!TextUtils.isEmpty(directoryPath)) {// 是否需要创建新的目录
                final File threadListFile = new File(directoryPath);
                if (!threadListFile.exists()) {
                    threadListFile.mkdirs();
                }
            }
            boolean bFlag = false;
            final int iLen = content.length();
            final File file = new File(fileName);
            try {
                if (!file.exists()) {
                    file.createNewFile();
                }
                final FileOutputStream fos = new FileOutputStream(file,
                        isAppend);
                byte[] buffer = new byte[iLen];
                try {
                    buffer = content.getBytes();
                    fos.write(buffer);
                    if (isAppend) {
                        fos.write("||".getBytes());
                    }
                    fos.flush();
                    bFlag = true;
                } catch (IOException ioex) {
                    if (LogUtils.DEBUG) {
                        LogUtils.e(ioex);
                    }
                } finally {
                    fos.close();
                    buffer = null;
                }
            } catch (Exception ex) {
                if (LogUtils.DEBUG) {
                    LogUtils.e(ex);
                }
            } catch (OutOfMemoryError o) {
                if (LogUtils.DEBUG) {
                    o.printStackTrace();
                }
            }
            return bFlag;
        }
        return false;
    }
    
    /**
     * 重命名
     *
     * @param filePath
     * @return
     */
    public static boolean rename(String filePath, String newFilePath) {
        if (LogUtils.DEBUG) {
            LogUtils.e("filePath " + filePath);
            LogUtils.e("newFilePath " + newFilePath);
        }
    
        if (!TextUtils.isEmpty(filePath)) {
            final File file = new File(filePath);
            final File newFile = new File(newFilePath);
            if (file.exists()) {
                return file.renameTo(newFile);
            }
        }
        return false;
    }   
    
    /**
     * 删除文件
     *
     * @param filePath
     * @return
     */
    public static boolean deleteFile(String filePath) {
        if (LogUtils.DEBUG) {
            LogUtils.e("deleteFile path " + filePath);
        }
    
        if (!TextUtils.isEmpty(filePath)) {
            final File file = new File(filePath);
            if (LogUtils.DEBUG) {
                LogUtils.e("deleteFile path exists " + file.exists());
            }
            if (file.exists()) {
                return file.delete();
            }
        }
        return false;
    }
    
    /**
     * 删除文件夹下所有文件
     *
     * @return
     */
    public static void deleteDirectoryAllFile(String directoryPath) {
        final File file = new File(directoryPath);
        deleteDirectoryAllFile(file);
    }
    
    public static void deleteDirectoryAllFile(File file) {
        if (!file.exists()) {
            return;
        }
    
        boolean rslt = true;// 保存中间结果
        if (!(rslt = file.delete())) {// 先尝试直接删除
            // 若文件夹非空。枚举、递归删除里面内容
            final File subs[] = file.listFiles();
            final int size = subs.length - 1;
            for (int i = 0; i <= size; i++) {
                if (subs[i].isDirectory())
                    deleteDirectoryAllFile(subs[i]);// 递归删除子文件夹内容
                rslt = subs[i].delete();// 删除子文件夹本身
            }
            // rslt = file.delete();// 删除此文件夹本身
        }
    
        if (!rslt) {
            if (LogUtils.DEBUG) {
                LogUtils.w("无法删除:" + file.getName());
            }
            return;
        }
    }
    
    /**
     * 根据后缀名删除文件
     *
     * @param delpath
     *            path of file
     * @param delEndName
     *            end name of file
     * @return boolean the result
     */
    public static boolean deleteEndFile(String delPath, String delEndName) {
        // param is null
        if (delPath == null || delEndName == null) {
            return false;
        }
        try {
            // create file
            final File file = new File(delPath);
            if (file != null) {
                if (file.isDirectory()) {
                    // file list
                    String[] fileList = file.list();
                    File delFile = null;
    
                    // digui
                    final int size = fileList.length;
                    for (int i = 0; i < size; i++) {
                        // create new file
                        delFile = new File(delPath + "/" + fileList[i]);
                        if (delFile != null && delFile.isFile()) {// 删除该文件夹下所有文件以delEndName为后缀的文件（不包含子文件夹里的文件）
                        // if (delFile != null) {//
                        // 删除该文件夹下所有文件以delEndName为后缀的文件（包含子文件夹里的文件）
                            deleteEndFile(delFile.toString(), delEndName);
                        } else {
                            // nothing
                        }
                    }
                } else if (file.isFile()) {
    
                    // check the end name
                    if (file.toString().contains(".")
                            && file.toString()
                                    .substring(
                                            (file.toString().lastIndexOf(".") + 1))
                                    .equals(delEndName)) {
                        // file delete
                        file.delete();
                    }
                }
            }
        } catch (Exception ex) {
            if (LogUtils.DEBUG) {
                LogUtils.e(ex);
            }
            return false;
        }
        return true;
    }
    
    /**
     * 删除文件夹内所有文件
     *
     * @param delpath
     *            delpath path of file
     * @return boolean the result
     */
    public static boolean deleteAllFile(String delpath) {
        try {
            // create file
            final File file = new File(delpath);
    
            if (!file.isDirectory()) {
                file.delete();
            } else if (file.isDirectory()) {
    
                final String[] filelist = file.list();
                final int size = filelist.length;
                for (int i = 0; i < size; i++) {
    
                    // create new file
                    final File delfile = new File(delpath + "/" + filelist[i]);
                    if (!delfile.isDirectory()) {
                        delfile.delete();
                    } else if (delfile.isDirectory()) {
                        // digui
                        deleteFile(delpath + "/" + filelist[i]);
                    }
                }
                file.delete();
            }
        } catch (Exception ex) {
            if (LogUtils.DEBUG) {
                LogUtils.e(ex);
            }
            return false;
        }
        return true;
    }
    
    /**
     * 删除目录（文件夹）以及目录下的文件
     *
     * @param sPath
     *            被删除目录的文件路径
     * @return 目录删除成功返回true，否则返回false
     */
    public static boolean deleteDirectory(String sPath) {
    
        if (TextUtils.isEmpty(sPath)) {
            return false;
        }
    
        boolean flag;
        // 如果sPath不以文件分隔符结尾，自动添加文件分隔符
        if (!sPath.endsWith(File.separator)) {
            sPath = sPath + File.separator;
        }
        final File dirFile = new File(sPath);
        // 如果dir对应的文件不存在，或者不是一个目录，则退出
        if (!dirFile.exists() || !dirFile.isDirectory()) {
            return false;
        }
        flag = true;
        // 删除文件夹下的所有文件(包括子目录)
        final File[] files = dirFile.listFiles();
        if (files != null && files.length > 0) {
            for (int i = 0; i < files.length; i++) {
                // 删除子文件
                if (files[i].isFile()) {
                    flag = deleteFile(files[i].getAbsolutePath());
                    if (!flag)
                        break;
                } // 删除子目录
                else {
                    flag = deleteDirectory(files[i].getAbsolutePath());
                    if (!flag)
                        break;
                }
            }
        }
        if (!flag)
            return false;
        // 删除当前目录
        if (dirFile.delete()) {
            return true;
        } else {
            return false;
        }
    }
    
     /**
     * 获取后缀名
     *
     * @param path
     *            全路径
     * @return
     */
    public static String getFileExtName(String path) {
        String ext = "";
        if ((path != null) && (path.length() > 0)) {
            int dot = path.lastIndexOf('.');
            if ((dot > -1) && (dot < (path.length() - 1))) {
                ext = path.substring(dot + 1);
            }
        }
        return ext;
    }
    
    /**
     * 获取文件名
     *
     * @param path
     *            全路径
     * @return
     */
    public static String getFileName(String path) {
        if (!TextUtils.isEmpty(path)) {
            return path.substring(path.lastIndexOf(File.separator) + 1);
        }
        return "";
    }
    
    /**
     * 获取文件所在的文件路径
     *
     * @param path
     * @return
     */
    public static String getFilePath(String path) {
        return path.substring(0, path.lastIndexOf(File.separator) + 1);
    }
    
    /**
     * 复制文件
     *
     * @param srcPath : 源文件全路径
     * @param destPath : 目标文件全路径
     * @return
     */
    public static long copyFile(String srcPath, String destPath) {
        try {
            int position = destPath.lastIndexOf(File.separator);
            String dir = destPath.substring(0, position);
            String newFileName = destPath.substring(position+1);
            final File cacheDir = new File(dir);
            if (!cacheDir.exists()) {
                cacheDir.mkdirs();
            }
            return copyFile(new File(srcPath), new File(dir), newFileName);
        } catch (Exception e) {
            return 0;
        }
    
    }
    
    /**
     * 复制文件(以超快的速度复制文件)
     *
     * @param srcFile
     *            源文件File
     * @param destDir
     *            目标目录File
     * @param newFileName
     *            新文件名
     * @return 实际复制的字节数，如果文件、目录不存在、文件为null或者发生IO异常，返回-1
     */
    @SuppressWarnings("resource")
    public static long copyFile(final File srcFile, final File destDir, String newFileName) {
        long copySizes = 0;
        if (!srcFile.exists()) {
           if (LogUtils.DEBUG) {
               LogUtils.d("源文件不存在");
           }
            copySizes = -1;
        } else if (!destDir.exists()) {
            if (LogUtils.DEBUG) {
                LogUtils.d("目标目录不存在");
            }
            copySizes = -1;
        } else if (newFileName == null) {
            if (LogUtils.DEBUG) {
                 LogUtils.d("文件名为null");
             }
            copySizes = -1;
        } else {
            FileChannel fcin = null;
            FileChannel fcout = null;
            try {
                fcin = new FileInputStream(srcFile).getChannel();
                fcout = new FileOutputStream(new File(destDir, newFileName)).getChannel();
                long size = fcin.size();
                fcin.transferTo(0, fcin.size(), fcout);
                copySizes = size;
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                try {
                    if (fcin != null) {
                        fcin.close();
                    }
                    if (fcout != null) {
                        fcout.close();
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return copySizes;
    }
    
    
    /**
     * 判断asset下是否存在某个文件
     *
     * @param context
     * @param fileName
     *            如:aa.txt或image/aa.jpg
     * @return
     */
    public static boolean existInAsset(Context context, String fileName) {
        boolean exist = false;
        try {
            String[] u = context.getAssets().list(getFilePath(fileName));
            for (String item : u) {
                if (item.equals(getFileName(fileName))) {
                    exist = true;
                    break;
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return exist;
    }
    
    /**
     * 获取目录文件个数
     *
     * @param f
     * @return
     */
    public static long getlist(File f) {
        long size = 0;
        try {
            File flist[] = f.listFiles();
            size = flist.length;
            for (int i = 0; i < flist.length; i++) {
                final File file = flist[i];
                if (file == null) {
                    continue;
                }
                if (file.isDirectory()) {
                    size = size + getlist(file);
                    size--;
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return size;
    }
    
    /**
     * 获取文件夹下所有文件大小
     *
     * @param f
     * @return
     */
    public static long getFileSize(File f) {
        long size = 0;
        try {
            File flist[] = f.listFiles();
            for (int i = 0; i < flist.length; i++) {
                final File file = flist[i];
                if (file == null) {
                    continue;
                }
                if (file.isDirectory()) {
                    size = size + getFileSize(file);
                } else {
                    size = size + file.length();
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return size;
    }
    
    /**
     * 调用此方法自动计算指定文件或指定文件夹的大小
     *
     * @param filePath 文件路径
     * @return 计算好的带B、KB、MB、GB的字符串
     */
    public static String getAutoFileOrFilesSize(File file) {
        if (file == null) {
            return "0B";
        }
    
        final long blockSize = getFileSize(file);
    
        if (LogUtils.DEBUG) {
            LogUtils.d("getAutoFileOrFilesSize 文件大小：" + blockSize);
        }
    
        return FormetFileSize(blockSize);
    }
    
    /**
     * 转换文件大小
     * @param fileS
     * @return
     */
    private static String FormetFileSize(long fileS) {
        final 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;
    }
    
    /**
     * 将字符串写入到文本文件中
     *
     * @param strcontent
     */
    public static void writeFileSdcard(String strcontent) {
        SimpleDateFormat formatter = new SimpleDateFormat("yyyy年MM月dd日   HH:mm:ss");
        Date curDate = new Date(System.currentTimeMillis());// 获取当前时间
        String str = formatter.format(curDate);
        // 每次写入时，都换行写
        String strContent = "-------当前时间===" + str + "\r\n" + strcontent + "\r\n";
        try {
            String strFilePath = Environment.getExternalStorageDirectory() + "/lunxun.text";
    
            File file = new File(strFilePath);
            if (!file.exists()) {
                Log.d("TestFile", "Create the file:" + strFilePath);
                file.createNewFile();
            }
            RandomAccessFile raf = new RandomAccessFile(file, "rw");
            raf.seek(file.length());
            raf.write(strContent.getBytes());
            raf.close();
        } catch (Exception e) {
            Log.e("TestFile", "Error on write File.");
        }
    }