camera zooming

You can add these 3 methods to CameraEx class:

getfocusdistances

Can you tell me how to add getfocusdistances to cameraEx class?
Thank you

Note that it is better to start a new thread for a new question.

You can use this code:

Seems like many devices doesn't support it properly:
Issue 14341 - android - Distances returned by Camera.Parameters.getFocusDistances() do not change on Nexus S regardless of actual focus distance - Android - An Open Handset Alliance Project - Google Project Hosting

how to call function GetMaxZoom ?

Have you added the methods to CameraEx class?

ya, i have already added to method CameraEx class
e g :

Sub btnZoomin_Click
ToastMessageShow("Zoom in",True)
CamEx.GetMaxZoom
End Sub

but it's does'nt work

In which way it doesn't work? This method returns the maximum allowed value. It will not change the zoom.

then how to call the function?

I'm sorry but I don't understand what you are trying to implement.

Hi cluster1,
are you looking for a way to start zooming on a button click? If yes, please find below some example code based on your own and what it is in post #2

udg

I use the ZOOM method to do zoom in/out , but the scene of camera not becoming larger or smaller.
Who can provides the camera zooming example for me, thanks.

I want to use a seekbar (- to +) to show the ZOOM image of camera scene
Is there a example for me??

Please do not make duplicate posts.

Yes, I can use the zooming control, but when I execute the FocusAndTakePicture method, then the procedure will break and throw the exception error about autofocus
I think that is the java error when I use the cameraExclass


Public Sub FocusAndTakePicture
cam.AutoFocus
End Sub

** Activity (main) Pause, UserClosed = true **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
Error occurred on line: 316 (cameraexclass)
java.lang.NullPointerException
at anywheresoftware.b4a.objects.CameraW.AutoFocus(CameraW.java:191)
at Insert.water.gov.cameraexclass._focusandtakepicture(cameraexclass.java:534)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:636)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:302)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:238)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:121)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:158)
at Insert.water.gov.main.afterFirstLayout(main.java:104)
at Insert.water.gov.main.access$100(main.java:16)
at Insert.water.gov.main$WaitForLayout.run(main.java:76)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5050)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:780)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:596)
at dalvik.system.NativeStart.main(Native Method)

Do you get this error when you run the example that comes with CameraEx class?

Yes, comes from the CameraEx class (Focusandtakepicture method)

Try to run the example as is and see if it works. Check the unfiltered logs.