我已经用camera2api对相机进行了编程，但是当我执行oncapturecompleted或oncaptureprogressed方法时，值​​获取除镜头焦距以外的空值。

@Override
    public void onCaptureCompleted(@NonNull CameraCaptureSession session, @NonNull CaptureRequest request, @NonNull TotalCaptureResult result) {
        super.onCaptureCompleted(session, request, result);

        String aperture = String.valueOf(result.get(CaptureResult.LENS_APERTURE));
        String focal_length = String.valueOf(result.get(CaptureResult.LENS_FOCAL_LENGTH));
        String focus_distance = String.valueOf(result.get(CaptureResult.LENS_FOCUS_DISTANCE));
        String exposure_time = String.valueOf(result.get(CaptureResult.SENSOR_EXPOSURE_TIME));
        String frame_duration = String.valueOf(result.get(CaptureResult.SENSOR_EXPOSURE_TIME));
        String sensitivity = String.valueOf(result.get(CaptureResult.SENSOR_SENSITIVITY));

    }

在此处输入图像描述