Xamarin.Android：从另一个应用程序打开日历中的特定事件

Question

I'm currently working on an app in Xamarin.Android with one of the features being that, upon clicking a button, the user is taken to a specific calendar event in the Microsoft Outlook app. Thus far I've been using the Microsoft Graph API to get the event items and I've succeeded in opening the Outlook app to the calendar or opening Outlook with an error message saying "Event could not be opened" but I haven't gotten both behaviors to happen, nor the specific event item to open. The way I open the Outlook app is by calling the device's default browser with an Outlook uri scheme. Both are provided below

browserLaunch("ms-outlook://events/open?account={my.account@email.com}&restid={id}");


private async void browserLaunch( string uri ) {
    await Browser.OpenAsync(uri, BrowserLaunchMode.SystemPreferred);
}

The exact call I've been making to the Graphs API is as follows

https://graph.microsoft.com/v1.0/me/calendarview?startdatetime=2020-01-23T15:54:40.377Z&enddatetime=2020-01-30T15:54:40.377Z

which returns a list of even items with the following scheme:

        "@odata.etag": "string",
            "id": "string",
            "createdDateTime": "20##-##-##T##:##:##.######Z",
            "lastModifiedDateTime": "20##-##-##T#3:##:##.#######Z",
            "changeKey": "string",
            "categories": [],
            "originalStartTimeZone": "Central Standard Time",
            "originalEndTimeZone": "Central Standard Time",
            "iCalUId": "string",
            "reminderMinutesBeforeStart": int,
            "isReminderOn": true/false,
            "hasAttachments": true/false,
            "subject": "string",
            "bodyPreview": "string",
            "importance": "string",
            "sensitivity": "string",
            "isAllDay": true/false,
            "isCancelled": true/false,
            "isOrganizer": true/true,
            "responseRequested": true/false,
            "seriesMasterId": null,
            "showAs": "string",
            "type": "string",
            "webLink": "https://outlook.office365.com/owa/?itemid={id}&exvsurl={int}&path=/calendar/item",
            "onlineMeetingUrl": null,
            "recurrence": null,
            "responseStatus": {
                "response": "none",
                "time": "0001-01-01T00:00:00Z"
            },
            "body": {
                "contentType": "html",
                "content": "string"
            },
            "start": {
                "dateTime": "20##-##-##T##:##:##.#######",
                "timeZone": "UTC"
            },
            "end": {
                "dateTime": "20##-##-##T##:##:##.#######",
                "timeZone": "UTC"
            },
            "location": {
                "displayName": "string",
                "locationType": "string",
                "uniqueId": "string",
                "uniqueIdType": "stirng"
            },
            "locations": [
                {
                    "displayName": "string",
                    "locationType": "string",
                    "uniqueId": "hexstrin-hexs-hexs-hexs-hexstringhex",
                    "uniqueIdType": "string"
                }
            ],
            "attendees": [
                {
                    "type": "string",
                    "status": {
                        "response": "string",
                        "time": "0001-01-01T00:00:00Z"
                    },
                    "emailAddress": {
                        "name": "string",
                        "address": "my.account@email.com"
                    }
                }
            ],
            "organizer": {
                "emailAddress": {
                    "name": "string",
                    "address": "my.account@email.com"
                }
            }

I've also tried different ids that are given by the graphs API for the restid param. Thus far I've used the itemid param found in the url of the webLink field, the id of the json object, the changeKey, and the iCalUId but those last two didnt get me anything beyond just opening up Outlook.

I've also just passed in the webLink but it just opens a lightweight browser (and get's stuck on a white page) which I don't want as I need it specifically to go to the Outlook app. Any ideas?

Answer 1

So the best current solution I have been able to find is to open up a lightweight browser using a different url scheme than any prior:

https://outlook.office365.com/calendar/item/{webLinkItemId}

where webLinkItemId is the itemId param from the webLink url gotten from the returned Graphs API json object. You can find that complete object above in my original post but what you're looking for within that object is the following field

"webLink": "https://outlook.office365.com/owa/?itemid={webLinkItemId}&exvsurl={int}&path=/calendar/item"

You want to take the {webLinkItemId} string embedded in the url above and plug it into the corresponding spot in the scheme above