ahviewpager B4A

سلام دوستان غزیز , امروز با یک موشگل دیگر ahviewpager برخوردم و درست کار نمی گنه و من 3 و 4 بار code مرور کردم ..

این code من است..

#Region Activity Attributes
#FullScreen: true
#IncludeTitle: false
#End Region

Sub Process_Globals
'These global variables will be declared once when the application starts.
'These variables can be accessed from all modules.

End Sub

Sub Globals
'These global variables will be redeclared each time the activity is created.
'These variables can only be accessed from this module.

Dim container As AHPageContainer
Dim pager As AHViewPager
Dim panel(3) As Panel

End Sub

Sub Activity_Create(FirstTime As Boolean)
'Do not forget to load the layout file created with the visual designer. For example:
Activity.LoadLayout("Lhelp")

container.Initialize

For i=0 To panel.Length -1

panel(i).Initialize("panel")
panel(i).Color=Colors.ARGB(100,Rnd(0,255), Rnd(0,255), Rnd(0,255))

Dim Images As BitmapDrawable
Dim count As Int = i + 1

Images.Initialize( LoadBitmap(File.DirAssets , "help" & count & ".jpg") )

panel(i).Background=Images
container.AddPage(panel(i) , "panel" & i )

Next

pager.Initialize(container,"pager")
Activity.AddView(pager ,0 ,0, 100%X , 100%Y )

End Sub

Sub Activity_Resume

End Sub

Sub Activity_Pause (UserClosed As Boolean)

End Sub

این خطایی که میده:

*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = true **
** Activity (help) Create, isFirst = true **
java.lang.AbstractMethodError: abstract method not implemented
at android.support.v4.view.PagerAdapter.instantiateItem(PagerAdapter.java)
at android.support.v4.view.ViewPager.addNewItem(ViewPager.java:321)
at android.support.v4.view.ViewPager.populate(ViewPager.java:441)
at android.support.v4.view.ViewPager.onAttachedToWindow(ViewPager.java:563)
at android.view.View.dispatchAttachedToWindow(View.java:9784)
at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2198)
at android.view.ViewGroup.addViewInner(ViewGroup.java:3376)
at android.view.ViewGroup.addView(ViewGroup.java:3208)
at android.view.ViewGroup.addView(ViewGroup.java:3188)
at anywheresoftware.b4a.objects.ActivityWrapper.AddView(ActivityWrapper.java:124)
at b4a.example.help._activity_create(help.java:390)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:710)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:342)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:249)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:139)
at b4a.example.help.afterFirstLayout(help.java:102)
at b4a.example.help.access$000(help.java:17)
at b4a.example.help$WaitForLayout.run(help.java:80)
at android.os.Handler.handleCallback(Handler.java:605)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4424)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)
** Activity (help) Resume **
java.lang.AbstractMethodError: abstract method not implemented
at android.support.v4.view.PagerAdapter.instantiateItem(PagerAdapter.java)
at android.support.v4.view.ViewPager.addNewItem(ViewPager.java:321)
at android.support.v4.view.ViewPager.populate(ViewPager.java:441)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:585)
at android.view.View.measure(View.java:12723)
at android.view.ViewGroup.measureChild(ViewGroup.java:4669)
at android.view.ViewGroup.measureChildren(ViewGroup.java:4646)
at anywheresoftware.b4a.BALayout.onMeasure(BALayout.java:64)
at android.view.View.measure(View.java:12723)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4698)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
at android.view.View.measure(View.java:12723)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:812)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:553)
at android.view.View.measure(View.java:12723)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4698)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2092)
at android.view.View.measure(View.java:12723)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1064)
at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2442)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4424)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)

اگر کسی میدونه که چرا این مشگل است , ممنون میشم و کمکم کنید..