StorageState获取SD卡状态

Question

Camera..setStorageStateCallBack(new StorageState.Callback() {
            @Override
            public void onUpdate(@NonNull StorageState storageState) {
                storageState.getAvailableCaptureCount();//result 0
                storageState.getRemainingSpaceInMB();//result 0
                storageState.getTotalSpaceInMB();//result 0
            }
        });

Android DJI SDK获取Camera StorageState，所有结果均为0，有没有办法获取sdcard存储？