经过网络搜索，整理 如下方法是可用的 java/android 统计文件夹大小及删除文件夹下所有文件和路径
/**
* 获取文件夹大小
* @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) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//return size/1048576;
return size;
}
/**
* 删除指定目录下文件及目录
* @param deleteThisPath
* @param filepath
* @return
*/
public void 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();
}
}
}
} catch (Exception e) {
// TODO Auto-generated catch block
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";
}