Updating all dependencies to the vision module of 9.4.0

[tatocaster]

update 8.4.0 to com.google.android.gms:play-services-vision:9.4.0 please

[navidemad]

👍 It will may be patch this error with also the merging of PR/Fix possible NullPointerException.

From CameraSource.java:1175
E/OpenCameraSource: Exception thrown from receiver.

java.lang.NullPointerException: Attempt to invoke virtual method 'void com.google.android.gms.vision.Detector.receiveFrame(com.google.android.gms.vision.Frame)' on a null object reference
     at com.edwardvanraak.materialbarcodescanner.CameraSource$FrameProcessingRunnable.run(CameraSource.java:1175)
     at java.lang.Thread.run(Thread.java:818)

[Celggar]

Hello,
This error is still happening, do you know if there is any way to correct it?
It happens when I open the scanner a second time