App crashes after switching cameras multiple times about camera-samples HOT 7 CLOSED

@nominalista what device are you experiencing this in?

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@owahltinez Pixel 3.

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Unfortunately this is an error happening inside of CameraX which cannot be (easily) caught by the app. If I'm reading the logs correctly, it could be caused by the camera session sending frames to a surface that has been recycled.

Based on the behavior that you described, a workaround could be to prevent users from switching fragments until the session has been properly started. For example, keeping the button disabled until preview starts.

I'll work on getting a reliable way to reproduce this on our side, and see if we can add the workaround to the sample as well.

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@nominalista I am not able to reproduce this issue on a Pixel 3 XL. I tried pressing the switch button 15-20 times very fast, not giving the preview enough time to load; then a little slower, immediately after preview is shown; and then even slower, every 2-3 seconds.

Unfortunately I have been unable to test on the emulator due to #9

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Now that #9 is fixed I tested on the emulator but I'm also unable to reproduce. Are you still able to reproduce this issue? Can you please try again with the updated sample and, if it still crashes, share what OS build your Pixel 3 is running?

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Sorry for late response, this video shows the issue.
After update everything works fine. Thanks and I think this issue can be closed now.

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@nominalista I think the camera is working fine. You can add some blocker/stopper when user pressed 300-400 milliseconds interval.

You can use handler.

I fixed things like this using debounce from rxbindings

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