Inheritance: android.widget.Button, Checkable
            public void onCheckedChanged(CompoundButton cb, bool value)
            {
                that.ShowToast("cb_onchanged");

                using (var c = new SQLiteConnection(AbstractNotifyService.ConnectionString))
                {
                    c.Open();

                    var MyDataTable = new MyDataTable(c);

                    if (value)
                    {
                        MyDataTable.StartEarlier = 1;

                        that.StartPendingAlarm(NotifyServiceFromTimer.Class, 1000 * 8, 1000 * 41);

                        that.startservice.setEnabled(false);
                        that.stopservice.setEnabled(true);
                    }
                    else
                    {
                        MyDataTable.StartEarlier = 0;

                        that.CancelPendingAlarm(NotifyServiceFromTimer.Class);

                        that.startservice.setEnabled(true);
                        that.stopservice.setEnabled(false);
                    }

                    c.Close();


                }
            }