其他 - 如何获取Google日历附加组件上的输入值？

我正在为Google日历编写第一个附加组件，但无法从输入字段或日期选择器中获取值。

我创建了一个带有几个日期选择器（事件开始日期和结束日期），文本输入（用于事件标题）和按钮的卡片。我想做的是单击一个按钮后，我想获得输入的文本输入值并（现在）记录它。

这就是我得到的：

var card = CardService.newCardBuilder();
var textInputTitle = CardService.newTextInput()
    .setFieldName("text_input_title")
    .setTitle("Title for editor");

function onHomepage(e) {
  return createCard(e.hostApp, true);
}

function createCard(text) {

// Create action button for submitting entered data
  var action = CardService.newAction()
      .setFunctionName('onCreateEvent')
      .setParameters({text: text});
  var button = CardService.newTextButton()
      .setText('Create event')
      .setOnClickAction(action)
      .setTextButtonStyle(CardService.TextButtonStyle.FILLED);
  var buttonSet = CardService.newButtonSet()
      .addButton(button);

  var startDateTimePicker = CardService.newDateTimePicker()
    .setTitle("Event start date")
    .setFieldName("date_time_field_start")
    .setValueInMsSinceEpoch(new Date().getTime())
    .setTimeZoneOffsetInMins(+2 * 60)
    .setOnChangeAction(CardService.newAction()
    .setFunctionName("handleDateTimeChange"));

  var endDateTimePicker = CardService.newDateTimePicker()
    .setTitle("Event end date")
    .setFieldName("date_time_field_end")
    .setValueInMsSinceEpoch(new Date().getTime())
    .setTimeZoneOffsetInMins(+2 * 60)
    .setOnChangeAction(CardService.newAction()
    .setFunctionName("handleDateTimeChange"));


  var section = CardService.newCardSection().setHeader("I am section header")
      .addWidget(startDateTimePicker)
      .addWidget(endDateTimePicker)
      .addWidget(textInputTitle)
      .addWidget(buttonSet);

  card.addSection(section);
  return card.build();
  } 

function onCreateEvent(e){
  Logger.log("Text input%s ",JSON.stringify(e) );
}

我想记录textInputs值，但我得到的只是空值。我也检查了谷歌应用程序脚本，gmail addon获得了TextInput值，解决了类似的问题，但是我不知道e.formInput从哪里来。

更新添加我的清单文件

{
  "timeZone": "America/New_York",
  "dependencies": {
    "enabledAdvancedServices": [{
      "userSymbol": "Calendar",
      "serviceId": "calendar",
      "version": "v3"
    }]
  },
  "exceptionLogging": "STACKDRIVER",
  "oauthScopes": ["https://www.googleapis.com/auth/calendar.addons.execute",
                  "https://www.googleapis.com/auth/calendar", 
                  "https://www.googleapis.com/auth/script.locale"
                 ],
  "runtimeVersion": "V8",
  "addOns": {
    "common": {
      "name": "event creator",
      "logoUrl": "https://www.gstatic.com/images/icons/material/system/1x/calendar_today_black_48dp.png",
      "useLocaleFromApp": true,
      "homepageTrigger": {
        "runFunction": "onHomepage",
        "enabled": true
      }
    },
    "calendar": {
      "eventOpenTrigger": {
        "runFunction": "onCalendarEventOpen"
      }
    }
  }
}