private void dateTimePickerTask_Completed(object sender, DateTimePickerTask.DateTimeResult e)
        {
            if (e.Error != null)
            {
                DispatchCommandResult(new PluginResult(PluginResult.Status.ERROR), _callbackId);
                return;
            }

            switch (e.TaskResult)
            {
                case TaskResult.OK:
                    try
                    {
                        var result = (long) e.Value.Value.ToUniversalTime().Subtract(new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc)).TotalMilliseconds;

                        if (!ResultHandlers.ContainsKey(CurrentCommandCallbackId))
                        {
                            ResultHandlers.Add(CurrentCommandCallbackId, mySavedHandler);
                        }
                        DispatchCommandResult(new PluginResult(PluginResult.Status.OK, result.ToString()), _callbackId);
                    }
                    catch (Exception ex)
                    {
                        DispatchCommandResult(new PluginResult(PluginResult.Status.ERROR, "Datetime picker error. " + ex.Message), _callbackId);
                    }
                    break;

                case TaskResult.Cancel:
                    DispatchCommandResult(new PluginResult(PluginResult.Status.ERROR, "Cancelled."), _callbackId);
                    break;
            }

            _dateTimePickerTask = null;
        }
        public void selectTime(string options)
        {
            try
            {
                if (ResultHandlers.ContainsKey(CurrentCommandCallbackId))
                {
                    mySavedHandler = ResultHandlers[CurrentCommandCallbackId];
                }

                if (!GetDefaults(options)) return;

                _dateTimePickerTask = new DateTimePickerTask
                    {
                        Value = _dateTimePickerOptions.Value,
                        Step = _dateTimePickerOptions.Step
                    };

                _dateTimePickerTask.Completed += dateTimePickerTask_Completed;
                _dateTimePickerTask.Show(DateTimePickerTask.DateTimePickerType.Time);
            }
            catch (Exception e)
            {
                DispatchCommandResult(new PluginResult(PluginResult.Status.ERROR, e.Message), _callbackId);
            }
        }