First click not registered when Camera is started (Android emulator only)

[jeffreyfjohnson]

What are you trying to achieve or the steps to reproduce?

Emulator only In the activity where the CameraView is shown, on a Pixel 2 emulator running API 28, whenever the CameraView is started and shown, the first click for any View on that screen is not registered. Not even the bottom buttons (back, home, recents) work on the first click.

• If I do not call start on the Camera instance, this is not an issue
• If the CameraView's visibility is set to GONE or INVISIBLE this is not an issue
• Everything works fine after the first click anywhere on the activity

How did you initialize FA?

class CaptureActivity : AppCompatActivity() {

    private var camera: MyCamera? = null

    override fun onCreate(savedInstanceState: Bundle?) {
         camera = MyCamera(this, cameraView, lifecycle)
    }
    ....
}

class MyCamera(
    context: Context,
    cameraView: CameraView,
    private val lifecycle: Lifecycle,
    private val photoDirectory: File? = context.getExternalFilesDir(PHOTOS_DIRECTORY)
) : LifecycleObserver {

    companion object {
        private const val PHOTOS_DIRECTORY = "photos"
    }

    private val camera = Fotoapparat(
        context = context,
        view = cameraView,
        lensPosition = back(),
        scaleType = ScaleType.CenterInside,
        cameraErrorCallback = { error ->
            logError("Camera error", error)
        }
    )
    private var startedCamera = false

    init {
        lifecycle.addObserver(this)
    }

    @OnLifecycleEvent(Lifecycle.Event.ON_START)
    fun start() {
        if (!startedCamera) {
            camera.start()
            startedCamera = true
        }
    }

    @OnLifecycleEvent(Lifecycle.Event.ON_STOP)
    fun stop() {
        camera.stop()
        startedCamera = false
    }

    @OnLifecycleEvent(Lifecycle.Event.ON_DESTROY)
    private fun removeObserver() = lifecycle.removeObserver(this)
}

Note that nothing changes if instead of using OnLifeCycleEvent annotations, we just call start and stop on the camera in the Activity

Context:

• FA version: 2.6.1
• Devices/APIs affected: Pixel 2 Emulator running API 28
• any other relevant information: Seems to work just fine on real devices

[jeduden]

I have the feeling that this is not a specific issue of fotoapparat. I just tried the official Camera2BasicKotlin sample and it has the same issue. The first click on the "picture" button is also not registered in the emulator when i tested it.