Android Question NOT SOLVED Issue in Camera Preview

Hi to Everybody,
does anybody have my same problem?
I need to take pictures. This works ok, but if I start the APP and start the pictures' capture i this error stack:
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
at dalvik.system.NativeStart.main(Native Method)
java.lang.NoSuchMethodException: getPreviewSize
java.lang.NoSuchMethodException: getPreviewSize
at java.lang.ClassCache.findMethodByName(ClassCache.java:247)
at java.lang.Class.getDeclaredMethod(Class.java:731)
at anywheresoftware.b4a.agraham.reflection.Reflection.runmethod(Reflection.java:214)
at anywheresoftware.b4a.agraham.reflection.Reflection.RunMethod(Reflection.java:802)
at com.YourPersonalAssistantTest.app.cameraexclass._vvvvvvvvvvvvvvvvvvvv4(cameraexclass.java:416)
at com.YourPersonalAssistantTest.app.camera._camera1_preview(camera.java:382)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:174)
at anywheresoftware.b4a.keywords.Common.CallSub4(Common.java:858)
at anywheresoftware.b4a.keywords.Common.CallSubNew2(Common.java:815)
at com.YourPersonalAssistantTest.app.cameraexclass._camera_preview(cameraexclass.java:93)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:174)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:158)
at anywheresoftware.b4a.objects.CameraW$2$1$1.onPreviewFrame(CameraW.java:147)
at android.hardware.Camera$EventHandler.handleMessage(Camera.java:589)
at android.os.Handler.dispatchMessage(Handler.java:99)
at anywheresoftware.b4a.Msgbox.waitForMessage(Msgbox.java:197)
at anywheresoftware.b4a.Msgbox.msgbox(Msgbox.java:136)
at anywheresoftware.b4a.BA.ShowErrorMsgbox(BA.java:221)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:201)
at anywheresoftware.b4a.keywords.Common.CallSub4(Common.java:858)
at anywheresoftware.b4a.keywords.Common.CallSubNew2(Common.java:815)
at com.YourPersonalAssistantTest.app.cameraexclass._camera_preview(cameraexclass.java:93)


The logic to get preview and the picture is on a second activity. I issue activity.finish to terminate the second activity. Then I start again main. It connects for many times, does the work and then disconnects. I can quickly repeat the process and it seems to work very well. Then comes the issue. The stack dumps continuosly without interruption the text in red above and on phone's screen a question is shown:
Error occurred:
An Error has occurred in sub:
java.lang.NoSuchMethodException:
getPreviewSize
Continue?

If I click NO the program resets and everything starts again! The issue solves itself...

Have someone an hint for me?

Thank you!

Mauro

Mauro