Android Question java error

Sub Activity_KeyPress (KeyCode As Int) As Boolean
    If KeyCode  = KeyCodes.KEYCODE_BACK Then 'if double pressed {exit} or single pressed {return}
        If WebView_Main.tag = "https://beisat.com/" & Starter.language & "/" Or WebView_Main.tag = "https://beisat.com/" & Starter.language & "/" Then
            Timer_exit.Interval = 2000
            Timer_exit.Enabled = True
            backButtonCounter = backButtonCounter + 1
            If backButtonCounter > 1 Then
                CloseActivities
            End If
            ToastMessageShow(translator.translate("Press Back button again to exit"), False)
        Else
            WebView_Main.onBackPressed 'go to prevoius web page
            Timer_exit.Interval = 500
            Timer_exit.Enabled = True
            backButtonCounter = backButtonCounter + 1
            If backButtonCounter > 1 Then
                CloseActivities
            End If
            grayer
        End If
        Return True
    Else
        Return False
    End If
End Sub