Android查看文件夹大小以及删除文件夹的工具类

import android.text.TextUtils;import java.io.File;import java.math.BigDecimal;public class StorageCleanUtils { /**  * 获取文件夹大小(递归)  *  * @param file File实例  * @return long  */ public static long getFolderSize(java.io.File file) {  long size = 0;  try {   java.io.File[] fileList = file.listFiles();   for (int i = 0; i < fileList.length; i++) {    if (fileList[i].isDirectory()) {     size = size + getFolderSize(fileList[i]);    } else {     size = size + fileList[i].length();    }   }  } catch (Exception e) {   e.printStackTrace();  }  return size; } /**  * 获取当前文件夹大小，不递归子文件夹  *  * @param file  * @return  */ public static long getCurrentFolderSize(File file) {  long size = 0;  try {   java.io.File[] fileList = file.listFiles();   for (int i = 0; i < fileList.length; i++) {    if (fileList[i].isDirectory()) {     //跳过子文件夹    } else {     size = size + fileList[i].length();    }   }  } catch (Exception e) {   // TODO Auto-generated catch block   e.printStackTrace();  }  return size; } /**  * 删除指定目录下文件及目录  *  * @param deleteThisPath  * @param filePath  * @return   */ public static boolean deleteFolderFile(String filePath, boolean deleteThisPath) {  if (!TextUtils.isEmpty(filePath)) {   try {    File file = new File(filePath);    if (file.isDirectory()) {// 处理目录     File files[] = file.listFiles();     for (int i = 0; i < files.length; i++) {      deleteFolderFile(files[i].getAbsolutePath(), true);     }    }    if (deleteThisPath) {     if (!file.isDirectory()) {// 如果是文件，删除      file.delete();     } else {// 目录      if (file.listFiles().length == 0) {// 目录下没有文件或者目录，删除       file.delete();      }     }    }    return true;   } catch (Exception e) {    e.printStackTrace();    return false;   }  }  return false; } /**  * 删除指定目录下文件  *  * @param filePath  * @return  */ public static void deleteFile(String filePath) {  if (!TextUtils.isEmpty(filePath)) {   try {    File file = new File(filePath);    java.io.File[] fileList = file.listFiles();    for (int i = 0; i < fileList.length; i++) {     if (!fileList[i].isDirectory()) {      fileList[i].delete();     }    }   } catch (Exception e) {    e.printStackTrace();   }  } } /**  * 格式化单位  *  * @param size  * @return  */ public static String getFormatSize(double size) {  double kiloByte = size / 1024;  if (kiloByte < 1) {   return size + "Byte(s)";  }  double megaByte = kiloByte / 1024;  if (megaByte < 1) {   BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));   return result1.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "KB";  }  double gigaByte = megaByte / 1024;  if (gigaByte < 1) {   BigDecimal result2 = new BigDecimal(Double.toString(megaByte));   return result2.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "MB";  }  double teraBytes = gigaByte / 1024;  if (teraBytes < 1) {   BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));   return result3.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "GB";  }  BigDecimal result4 = new BigDecimal(teraBytes);  return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "TB"; }}