Android文件递归遍历

if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {    //判断SD卡是否可用            File file = new File(path);            File[] files = file.listFiles();            for (File filename : files) {                if (filename.isDirectory()) {    //如果是文件夹                //递归                    btnLoad(filename.getAbsolutePath());                } else {                    String[] filePath = filename.getName().toString().split("\\.");                    if (filePath.length == 2) {                        if (filePath[1].equals("mp3") ||                         }                    }                }            }        }