android 对文件夹里文件排序

private int mFileSize = 0;
private List<String> mPathString = new ArrayList<String>();
private boolean sortFolder(String path) {
if (path == null || StringUtil.isEmpty(path))
return false;


File[] fileList = null;

File file = new File(path);
if (file.exists() == false){
file.mkdir();
}


if (!file.exists() || (file.isDirectory() && (file.listFiles().length == 0))) {
return true;
} else {
fileList = file.listFiles();

mFileSize = file.listFiles().length;

mPathString.clear();

if(mFileSize > 0) {
for(int i = 0;i < mFileSize;i++) {
mPathString.add(fileList[i].getAbsolutePath());
}
Collections.sort(mPathString);
}
return false;
}

}

PS: 参数path是文件夹路径