How to open another app from Metro App

Question

Hi All,

I implement simple project in Metro App. The scenario is in[Black App] have a button to open [Green App] and [Red App].

I have 2 question :

1. I using Protocol &  Windows.System.Launcher.LaunchUriAsync(_Uri) it work well. So Have another way to open App form another app  in Metro. Could you tell me detail about another way ?

2. How i can open [Green App] & [Red App] when [Black App] is launch. I try to implment function in the question [1] but not success

Here My code:

  public static async void Open()
        {

            var _Uri = new Uri("GreenApp: " + DateTime.Now.ToString());

              await Windows.System.Launcher.LaunchUriAsync(_Uri,
              new Windows.System.LauncherOptions
              {
                  DesiredRemainingView = ViewSizePreference.UseNone
              });
        }

Thanks for supporting me.

Answer 1

No. Windows Store apps cannot directly open other apps. Launching protocols out files into the default handlers is the only option.

This launch can only be done while the app is on the foreground. You're probably calling this too early. Wait for the app to be fully initialized and running.

Answer 2

Yes, Thanks so much, Rob