Bug? NullReferenceException in CameraEx

tigrot

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• Jan 17, 2014

• #1

Hi everybody,
I have just downloaded the new v. 3.20. I have discovered that CameraExClass crashes at once with Null Reference in Camera_ready event. The phone is the usual Basic 2.3.6 GT-S5300 I use for program testing, when a basic compatibility is needed. No preview is shown on screen.
The same program works in V. 3.00.
I include the program as a reference

 

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• fidelity.zip

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Erel

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• Jan 17, 2014

• #2

Note that you should use File - Export as zip when uploading projects.

Can you post the full error message from the logs?

I've edited the title to better match the issue.

 

tigrot

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• Jan 21, 2014

• #3

Forgive me. Next I'll do better...

The trace:
PackageAdded: package:b4a.example
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
java.lang.NullPointerException
at anywheresoftware.b4a.agraham.reflection.Reflection.runmethod(Reflection.java:205)
at anywheresoftware.b4a.agraham.reflection.Reflection.RunMethod(Reflection.java:802)
at b4a.example.cameraexclass._camera_ready(cameraexclass.java:155)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:173)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:157)
at anywheresoftware.b4a.objects.CameraW$2$1.run(CameraW.java:139)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3687)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
at dalvik.system.NativeStart.main(Native Method)

The application stopped in GetParameters instruction of Camera_ready:

r.target = cam
nativeCam = r.GetField("camera")
r.target = nativeCam
parameters = r.RunMethod("getParameters")
SetDisplayOrientation
Else
Log("success = false, " & LastException)
End If
CallSub2(target, event & "_ready", Success)

Have a nice day

Mauro

 

Erel

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• Jan 21, 2014

• #4

This error means that it failed to open the camera. Have you tried to restart the phone?

 

tigrot

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• Jan 27, 2014

• #5

I only recompiled the same source in 3.00 and the phone worked well, with no reboot. The error happened on second run of the APP while 3.00 never gave this issue. Maybe the issue is in stopping the camera...

 

Erel

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• Jan 28, 2014

• #6

I don't think that it is related to v3.20. Nothing has changed that can affect the camera behavior.

 

tigrot

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Longtime User

• Jan 28, 2014

• #7

Thank you for support. I'll further investigate, if the project will go on... At present the error seems reproducible. The strange is that I have a big pjt, involving also the camera, with 3 services running and have no issue, but at this time I prefer to distribute in 3.00 format, till I'll solve this issue.