public static List<String> getFilesAllName(String path) {
File file=new File(path);
File[] files=file.listFiles();
if (files == null){Log.e("error","空目录");return null;}
List<String> s = new ArrayList<>();
for(int i =0;i<files.length;i++){
s.add(files[i].getAbsolutePath());
}
return s;
}