Android Question Dex Error

#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 btnone As Button
Dim edt1 As EditText
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("Layout1")
     Activity.LoadLayout("8x18")
     Activity.SetBackgroundImage(LoadBitmap(File.DirAssets, "background.png"))
     edt1.Color = Colors.White
End Sub

Sub btnone_click
    If edt1.Text = 144 Then
        Msgbox("Correct answer", "Result")
        btnnext_click
    Else
        Msgbox("Wrong answer", "Result")
    End If
End Sub


Sub btnnext_click
    StartActivity("eightnineteen")
    Activity.finish
End Sub