Android Question Changing the dimension of the Webview through screen orientation

SetActivityAttribute(Main, android:configChanges, "orientation|screenSize")

Sub Globals
   Private ime1 As IME
   Private WebView1 As WebView
   Private ActivityParent As JavaObject
End Sub

Sub Activity_Create(FirstTime As Boolean)
   WebView1.Initialize("WebView1")
   Activity.AddView(WebView1, 0, 0, 100%x, 100%y)
   ime1.Initialize("ime1")
   ime1.AddHeightChangedEvent
   WebView1.LoadUrl("http://www.google.com")
   Dim jo As JavaObject = Activity
   jo.RunMethodJO("getContext", Null).RunMethodJO("getWindow", Null).RunMethod("setSoftInputMode", _
     Array As Object(0x20))
   ActivityParent = jo.RunMethodJO("getParent", Null)
End Sub
Sub IME1_HeightChanged (NewHeight As Int, OldHeight As Int)
   CallSubDelayed(Me, "AfterChange")
End Sub

Sub AfterChange
   Dim ajo As Panel = Activity
   Dim width As Int = ActivityParent.RunMethod("getMeasuredWidth", Null)
   Dim height As Int = ActivityParent.RunMethod("getMeasuredHeight", Null)
   If width = 0 OR height = 0 Then Return
   ajo.Width = width 'update the "activity" width and height
   ajo.Height = height
   WebView1.Width = width
   WebView1.Height = height
End Sub

Sub Activity_Resume
   AfterChange
End Sub

Private screenwidth As Int = GetDeviceLayoutValues.Width
    Private screenheight As Int = GetDeviceLayoutValues.Height
    
    Private left As Int = (screenwidth/2)-(WebView1.Width/2)
    Private top As Int = (screenheight/2)-(WebView1.height/2) -40
    If (screenwidth < screenheight) Then    ' portrait
        WebView1.SetLayout(0dip,0dip,WebView1.width,WebView1.height)
    Else
        WebView1.SetLayout(left, top, screenwidth,screenheight)
    End If