安卓6.0获取权限

 public static boolean isGrantExternalRW(Activity activity) {        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && activity.checkSelfPermission(                Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {            activity.requestPermissions(new String[]{                    Manifest.permission.READ_EXTERNAL_STORAGE,                    Manifest.permission.WRITE_EXTERNAL_STORAGE            }, 1);            return false;        }        return true;    }