提供的网址可以是可公开访问的网址，也可以是 base64 编码的图片字符串。如需获取后者，您可以使用以下代码根据 Google 云端硬盘中的图片创建编码图片字符串，然后存储该字符串以供日后与 setImageUrl(imageUrl) 搭配使用。此方法可让您的插件无需访问公开可用的图片网址：
// The following assumes you have the image to use in Google Drive and have its// ID.constimageBytes=DriveApp.getFileById('123abc').getBlob().getBytes();constencodedImageURL=`data:image/jpeg;base64,${Utilities.base64Encode(imageBytes)}`;// You can store encodeImageURL and use it as a parameter to// CardHeader.setImageUrl(imageUrl).
[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["没有我需要的信息","missingTheInformationINeed","thumb-down"],["太复杂/步骤太多","tooComplicatedTooManySteps","thumb-down"],["内容需要更新","outOfDate","thumb-down"],["翻译问题","translationIssue","thumb-down"],["示例/代码问题","samplesCodeIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC)：2025-01-30。"],[[["`CardHeader` objects allow you to customize the header of a card, including title, subtitle, and image, within Google Workspace Add-ons and Google Chat apps."],["You can set an image for the header using `setImageUrl()` by providing a public URL or a base64 encoded image string."],["`setTitle()` and `setSubtitle()` allow you to define the main text and supporting text for the header, respectively."],["Customize the image display with `setImageStyle()` to control cropping and use `setImageAltText()` to provide alternative text for accessibility."]]],["The `CardHeader` object allows customization of a card's header in Google Workspace add-ons and Google Chat apps. Key actions include setting the header's title using `setTitle()`, a subtitle with `setSubtitle()`, and an image via `setImageUrl()`. The image's appearance can be modified with `setImageStyle()` for cropping and `setImageAltText()` for alternative text. Image URLs can be direct links or base64 encoded strings. Each method returns the `CardHeader` object, enabling method chaining.\n"]]
