external camera support

[yang tian]

Hi  CameraX Development Team!

Currently, Seems cameraX has no support of external caemra?

Do you plan to add the support later?

Thanks!

[Vinit Modi]

Hi Yang,

Correct, we currently do not support external cameras. Thanks for making the suggestion, adding an external camera isn't currently on our roadmap but we will take the feedback into consideration. 

Vinit

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[tonyt...@google.com]

You may try Camera2CameraFilter to select the external camera if needed. A basic implementation may looks like below. Note that this is experimental and hasn't been fully verified. Hope it helps!

// Implement a camera filter that selects LENS_FACING_EXTERNAL cameras.

CameraFilter cameraFilter = Camera2CameraFilter.createCameraFilter((cameraInfos) -> {

    List<CameraInfo> resultCameraInfos = new ArrayList<>();

    for (CameraInfo cameraInfo : cameraInfos) {

        Integer lensFacing = Camrea2CameraInfo.from(cameraInfo).getCameraCharacteristic(CameraCharacteristics.LENS_FACING);

        if (lensFacing != null && lensFacing == CameraMetadata.LENS_FACING_EXTERNAL) {

            resultCameraInfos.add(cameraInfo);

        }

    }

    return resultCameraInfos;

});

// Create a camera selector without specifying lens facing and add the customized camera filter to it. Then use the camera selector to bind to the external camera.

CameraSelector cameraSelector = new CameraSelector.Builder().addCameraFilter(cameraFilter).build();

[yang tian]

Thanks!
I will have a try with this  Camera2CameraFilter .