Question How to call LaunchUriForResultsAsync in Unity for HoloLens

From the HoloLens, need to launch another UWP app, like app to app communications. We can get the results from the launching app to calling app using LaunchUriForResultsAsync (Windows API).

This API must be called from within an ASTA thread (also known as a UI thread). Pease find the below link as well
https://docs.microsoft.com/en-us/uw...her.launchuriforresultsasync?view=winrt-19041

Code (CSharp):

1. async Task<string> LaunchAppForResults()
2. {
3.     var testAppUri = new Uri("test-app2app:"); // The protocol handled by the launched app
4.     var options = new LauncherOptions();
5.     options.TargetApplicationPackageFamilyName = "67d987e1-e842-4229-9f7c-98cf13b5da45_yd7nk54bq29ra";
6.  
7.     var inputData = new ValueSet();
8.     inputData["TestData"] = "Test data";
9.  
10.     string theResult = "";
11.     LaunchUriResult result = await Windows.System.Launcher.LaunchUriForResultsAsync(testAppUri, options, inputData);
12.     if (result.Status == LaunchUriStatus.Success &&
13.         result.Result != null &&
14.         result.Result.ContainsKey("ReturnedData"))
15.     {
16.         ValueSet theValues = result.Result;
17.         theResult = theValues["ReturnedData"] as string;
18.     }
19.     return theResult;
20. }

using #ENABLE_WINMD_SUPPORT used the above method to run in HoloLens, throws exception that This API needs to be run on UI Thread. How we can achieve this.

 

To run something on UI thread in hololens, you do

Code (CSharp):

1. #if !UNITY_EDITOR && UNITY_WSA      
2.         UnityEngine.WSA.Application.InvokeOnUIThread(async () =>
3.         {
4.             //Example code
5.             UnityEngine.WSA.Launcher.LaunchUri(uri, false);
6.         }, false);
7. #endif

 

However documentation says LaunchUriForResultsAsync is only supported with WinRT which Hololens doesnt have yet. Have you found a workaround by any chance?

 

How do I find out the URI of a specific application?