Camera2：关闭自动曝光后，在拍照时闪光灯不起作用

Question

我遵循此方法在启用自动曝光时实施闪光灯 Android camera2 manual flash doesn't always work

所以我的代码是

if (mIsFlashSupported && mAutoExposure) {
            switch (mFlashMode) {
            case FLASH_ON:
                requestBuilder.set(CaptureRequest.CONTROL_AE_MODE, CameraMetadata.CONTROL_AE_MODE_ON_ALWAYS_FLASH);
                requestBuilder.set(CaptureRequest.FLASH_MODE, CameraMetadata.FLASH_MODE_OFF);
                break;
            case FLASH_OFF:
                requestBuilder.set(CaptureRequest.CONTROL_AE_MODE, CameraMetadata.CONTROL_AE_MODE_ON);
                requestBuilder.set(CaptureRequest.FLASH_MODE, CameraMetadata.FLASH_MODE_OFF);
                break;
            case FLASH_AUTO:
                requestBuilder.set(CaptureRequest.CONTROL_AE_MODE, CameraMetadata.CONTROL_AE_MODE_ON_AUTO_FLASH);
                requestBuilder.set(CaptureRequest.FLASH_MODE, CameraMetadata.FLASH_MODE_OFF);
                break;
            case TORCH:
                requestBuilder.set(CaptureRequest.CONTROL_AE_MODE, CameraMetadata.CONTROL_AE_MODE_ON);
                requestBuilder.set(CaptureRequest.FLASH_MODE, CameraMetadata.FLASH_MODE_TORCH);
                break;
            }
        } else if (mIsFlashSupported && !mAutoExposure) {
            switch (mFlashMode) {
                case FLASH_ON:
                case FLASH_AUTO:
                    requestBuilder.set(CaptureRequest.CONTROL_AE_MODE, CameraMetadata.CONTROL_AE_MODE_OFF);
                    requestBuilder.set(CaptureRequest.FLASH_MODE, CameraMetadata.FLASH_MODE_SINGLE);
                    break;
                case TORCH:
                    requestBuilder.set(CaptureRequest.CONTROL_AE_MODE, CameraMetadata.CONTROL_AE_MODE_OFF);
                    requestBuilder.set(CaptureRequest.FLASH_MODE, CameraMetadata.FLASH_MODE_TORCH);
                    break;
                case FLASH_OFF:
                    requestBuilder.set(CaptureRequest.CONTROL_AE_MODE, CameraMetadata.CONTROL_AE_MODE_OFF);
                    requestBuilder.set(CaptureRequest.FLASH_MODE, CameraMetadata.FLASH_MODE_OFF);
                    break;
            }
        }

当mAutoExposure = true（打开自动曝光）时，闪光灯可以正常工作，但是当mAutoExposure关闭时，则不能使用（不闪光）。有人可以帮忙吗？