Is CameraX supported on a the Android emulator?

[Andrew Gable]

I am seeing a crash on my Pixel 3 API 28 emulator when running the CameraX Basic App here: https://github.com/android/camera/tree/master/CameraXBasic

2019-05-22 14:39:12.464 6777-6777/com.android.example.cameraxbasic E/AndroidRuntime: FATAL EXCEPTION: main

    Process: com.android.example.cameraxbasic, PID: 6777

    java.lang.ArithmeticException: divide by zero

        at androidx.camera.camera2.impl.SupportedSurfaceCombination.getAllPossibleSizeArrangements(SupportedSurfaceCombination.java:435)

        at androidx.camera.camera2.impl.SupportedSurfaceCombination.getSuggestedResolutions(SupportedSurfaceCombination.java:195)

        at androidx.camera.camera2.impl.Camera2DeviceSurfaceManager.getSuggestedResolutions(Camera2DeviceSurfaceManager.java:185)

        at androidx.camera.core.CameraX.calculateSuggestedResolutions(CameraX.java:449)

        at androidx.camera.core.CameraX.bindToLifecycle(CameraX.java:144)

        at com.android.example.cameraxbasic.fragments.CameraFragment.bindCameraUseCases(CameraFragment.kt:301)

        at com.android.example.cameraxbasic.fragments.CameraFragment.access$bindCameraUseCases(CameraFragment.kt:100)

        at com.android.example.cameraxbasic.fragments.CameraFragment$onViewCreated$1.run(CameraFragment.kt:234)

        at android.os.Handler.handleCallback(Handler.java:873)

        at android.os.Handler.dispatchMessage(Handler.java:99)

        at android.os.Looper.loop(Looper.java:193)

        at android.app.ActivityThread.main(ActivityThread.java:6669)

        at java.lang.reflect.Method.invoke(Native Method)

        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)

        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

I don't see the same error on a Pixel 2XL or Galaxy S8 physical device. Is CameraX currently supported on emulators?

[James Fung]

Hi Andrew, 

This sounds like a similar issue spotted in the current build, with a fix now merged:

https://android-review.googlesource.com/c/platform/frameworks/support/+/960938/

Issue:

https://b.corp.google.com/issues/132603284

If so, the fix will be in the next build.  Generally the emulator should work, in a sense its a 'device' to ensure compatibility with.

We're open to hearing more about how heavily the emulator is used by camera developers in their workflows to help balance priorities.

[James Fung]

Here's the correct issue tracker link:
https://issuetracker.google.com/issues/132603284