@Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {

        if(requestCode == BMI_REQUEST_CODE){
            int photoId=data.getIntExtra("photoId",4);
            ivResult.setImageResource(photoIds[photoId]);
            //讓ivResult可以顯示
            ivResult.setVisibility(View.VISIBLE);
        }

        super.onActivityResult(requestCode, resultCode, data);
    }