Windows Phone 8.1 : how to Launch an Installed app From My app

Question

I have tried the following links

How do I launch other app from my own app in Windows Phone 8.1?

Call an external app on windows phone 8.1 runtime(not silverlig

Answer 1

It works for me.

1. setup your app which launch from other.

   add this in WMAppManifest.xaml between < /token> and < ScreenResolutions>

   add a class "AssociationUriMapper " and override the function "MapUri()"

   class AssociationUriMapper : UriMapperBase{
      private string tempUri;
   
      public override Uri MapUri(Uri uri){
         tempUri = System.Net.HttpUtility.UrlDecode(uri.ToString());
         if (tempUri.Contains("alsdkcs:MainPage?id=")){
            int idIndex = tempUri.IndexOf("id=") + 3; //3 is the length of "id="           
            string id = tempUri.Substring(idIndex);
   
            return new Uri("/MainPage.xaml?id=" + id, UriKind.Relative);
        }
        return uri;
     }
   }
   

   and call them from other app.xaml.cs at this section of InitializePhoneApplication() function

   RootFrame.UriMapper = new AssociationUriMapper(); // add this line only between RootFrame.Navigated += CompleteInitializePhoneApplication; and RootFrame.NavigationFailed += RootFrame_NavigationFailed;
   

2. finally call fron other app to launch an app

   var success = await Windows.System.Launcher.LaunchUriAsync(new System.Uri("alsdkcs:MainPage?id="+5)); 
   if (success){
      // URI launched
   }
   else{
     // URI launch failed
   }
   

   where "alsdkcs" is protocol name.

more details see msdn