开启“不保留活动”，还是会报异常

[okadaNana]

在华为 C8816，android 4.3 上，会报空指针异常。

经过断点调试，发现是 mCapturePhotoHelper 为 null

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        Log.i(TAG, "requestCode: " + requestCode + " resultCode: " + resultCode + " data: " + data);
        if (requestCode == CapturePhotoHelper.CAPTURE_PHOTO_REQUEST_CODE) {
            File photoFile = mCapturePhotoHelper.getPhoto();
            // 代码省略
}

是不是因为 mCapturePhotoHelper 被回收了啊？