CameraX Image Capture use case without preview

[Jia Sheng Xia]

Hi, in previous versions of CameraX I was successfully using only two use cases for my application written in Java: ImageCapture and ImageAnalysis.
Now, with version 1.2.0-beta01 (but also with 1.1.0), I'm having some trouble with ImageCapture callbacks: OnImageCapturedCallback and OnImageSavedCallback (not simultaneously).

Here is some logs I've seen before the expected but never seen onCaptureSuccess/onImageSaved or onError:

D/CameraOrientationUtil: getRelativeImageRotation: destRotationDegrees=90, sourceRotationDegrees=270, isOppositeFacing=false, result=0
D/ImageCapture: Send image capture request [current, pending] = [0, 1]
D/ImageCapture: issueTakePicture

After some tests I discovered that with Preview use case ImageCapture behaves actually how I expect:

D/CameraOrientationUtil: getRelativeImageRotation: destRotationDegrees=90, sourceRotationDegrees=270, isOppositeFacing=false, result=0
D/ImageCapture: Send image capture request [current, pending] = [0, 1]
D/ImageCapture: issueTakePicture
D/Camera2CameraImpl: {Camera@450165f[id=1]} Issue capture request
D/CaptureSession: Issuing capture request.
D/Camera2CaptureRequestBuilder: createCaptureRequest
W/GrallocMapperPassthrough: buffer descriptor with invalid usage bits 0x2080000
D/DEBUG: onCaptureSuccess: got ImageProxy!!!

Is this expected? Has Preview use case been required by ImageCapture?

Thank you.

[Leo Huang]

Hi, 

Do you mean the OnImageCapturedCallback and OnImageSavedCallback do not come when only using ImageCapture + ImageAnalysis?

If so, this could be a device specific issue. Could you provide the device brand and model name? and also see if the same issue happens on other devices. Thanks.

jiash...@gmail.com 在 2022年9月16日 星期五下午3:28:50 [UTC+8] 的信中寫道：