Crash while navigating back to preview from captured image

Getting this error when running the sample.

Steps to reproduce.

1. Capture the photo.
2. Navigate to captured image on clicking Gallery icon.
3. Navigate back to camera preview and notice the crash

I am able to reproduce consistently 👍

Device Name : Nokia 5.1 Model : TA-1061 Android version : 9

    Process: com.android.example.cameraxbasic, PID: 31287
    java.lang.IllegalStateException
        at androidx.core.util.Preconditions.checkState(Preconditions.java:96)
        at androidx.core.util.Preconditions.checkState(Preconditions.java:108)
        at androidx.camera.camera2.internal.Camera2CameraImpl$StateCallback.onClosed(Camera2CameraImpl.java:1298)
        at androidx.camera.camera2.internal.CameraDeviceStateCallbacks$ComboDeviceStateCallback.onClosed(CameraDeviceStateCallbacks.java:105)
        at android.hardware.camera2.impl.CameraDeviceImpl$5.run(CameraDeviceImpl.java:207)
        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.os.HandlerThread.run(HandlerThread.java:65)

[Simon-Richards]

I was getting this error also, and on screen rotation too. I did as @waliahimanshu suggested and upgraded to -alpha09 and the issue is gone

[waliahimanshu]

Hi, just took the latest changes since yesterday, and got the crash using repro steps above but different stack trace (see below).

However, yesterday I updated the version of sample project to alpha09, and the crash did not happen. I also found this note in release notes of alpha 09

Fixed issues when closing then opening cameras resulting in “Precondition” check failure.

So I reckon, the sample needs updating, because as is it crashes constantly.

2020-02-06 12:05:12.428 16038-16038/com.android.example.cameraxbasic D/AndroidRuntime: Shutting down VM
2020-02-06 12:05:12.429 16038-16079/com.android.example.cameraxbasic D/Camera: releasing session in state CLOSING
    
    --------- beginning of crash
2020-02-06 12:05:12.430 16038-16038/com.android.example.cameraxbasic E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.android.example.cameraxbasic, PID: 16038
    java.lang.NullPointerException: No camera bound to use case: ImageAnalysis:androidx.camera.core.ImageAnalysis-55973804-64fa-4cf8-b704-ddc45daef628
        at androidx.core.util.Preconditions.checkNotNull(Preconditions.java:81)
        at androidx.camera.core.UseCase.getBoundCameraId(UseCase.java:360)
        at androidx.camera.core.UseCase.isCurrentlyBoundCamera(UseCase.java:371)
        at androidx.camera.core.ImageAnalysis$1.onError(ImageAnalysis.java:212)
        at androidx.camera.camera2.internal.Camera2CameraImpl$16.run(Camera2CameraImpl.java:1008)
        at android.os.Handler.handleCallback(Handler.java:873)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6715)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:911)```