[null,null,["最后更新时间 (UTC):2025-08-29。"],[],[],null,["# Use a Meet add-on\n\nThis guide provides an overview of how people start and work with a\nGoogle Meet add-on.\n\nStart an add-on from the Activities panel\n-----------------------------------------\n\nFrom a Google Meet call, a user can click the Activities button. This brings\nup the Activities panel, which shows a list of built-in Meet\nfeatures and any add-ons the user has installed. Clicking on an\nicon launches the side panel view of the add-on.\n**Figure 1.** The Google Meet add-ons SDK main stage and side panel.\n\nCollaborate with other users\n----------------------------\n\nTo allow users to collaborate together, the add-on can\nset the\n[`ActivityStartingState`](/workspace/meet/add-ons/reference/websdk/addon_sdk.activitystartingstate).\nFor more information, see [Collaborate using a\nMeet add-on](/workspace/meet/add-ons/guides/collaborate-in-the-add-on).\n\nAfter opening an add-on, side panel users can start\nworking together once the add-on invokes the\n[`startActivity()`](/workspace/meet/add-ons/reference/websdk/addon_sdk.meetaddonclient.startactivity)\nmethod.\n\nFor example, an add-on might want to allow users to\ncollaborate on a document, but the add-on doesn't know\nwhich document. In this case, the document should be selected from the side\npanel view. After ensuring the document can be shared with others, the\nadd-on can set `ActivityStartingState` with other\nnecessary document identifiers.\n\nCollaborate in the main stage\n-----------------------------\n\nCollaborative activities can be done in the side panel or the main stage. If a\n`mainStageUrl` is listed in the add-on manifest,\ninvoking the\n[`startActivity()`](/workspace/meet/add-ons/reference/websdk/addon_sdk.meetaddonclient.startactivity)\nmethod automatically opens the add-on in the main stage\nand starts the activity.\n\nOnce the main stage is open, an add-on might choose to\nclose the side panel by calling the\n[`unloadSidePanel()`](/workspace/meet/add-ons/reference/websdk/addon_sdk.meetmainstageclient.unloadsidepanel)\nmethod. To extend the earlier example, a side panel that chooses a document may\nno longer be relevant and can be closed.\n\nTo re-open the side panel view, the add-on can call the\n[`loadSidePanel()`](/workspace/meet/add-ons/reference/websdk/addon_sdk.meetmainstageclient.loadsidepanel)\nmethod. For example, an add-on that creates user polls\nmight reopen the side panel to display question response rates.\n\nStart an add-on from screen sharing\n-----------------------------------\n\nUsers can start add-ons while screen sharing. If a user is screen\nsharing a website that has an add-on, that website can\npromote its add-on to the user by using the\n[`exposeToMeetWhenScreensharing()`](/workspace/meet/add-ons/reference/websdk/screenshare_api.meetaddonscreenshare.exposetomeetwhenscreensharing)\nmethod. This shows the user a notification banner in the Meet\ncall, prompting the user to either install or start the\nadd-on. For more information, see [Promote an\nadd-on to users through screen\nsharing](/workspace/meet/add-ons/guides/promote#screen_sharing).\n\nSince additional information can be supplied to the\nadd-on starting state from the website the user is\nscreen sharing, the add-on can skip the side panel and\nstart the activity in the main stage immediately after launching. If the\nadd-on needs to perform additional steps, like changing\npermissions on a document to share, the add-on can\nlaunch into the side panel and follow the flow described in [Collaborate with\nother users](#collaborate-with-other-users).\n\nRelated topics\n--------------\n\n- [Collaborate using a Meet add-on](/workspace/meet/add-ons/guides/collaborate-in-the-add-on)\n- [Promote an add-on to users through screen sharing](/workspace/meet/add-ons/guides/screen-sharing)"]]