launch android app packages

src/Android/MainActivity.cs

@@ -14,6 +14,7 @@ using Xamarin.Forms.Platform.Android;
 using Xamarin.Forms;
 using System.Threading.Tasks;
 using Bit.App.Models.Page;
+using Bit.App;
 
 namespace Bit.Android
 {
@@ -24,6 +25,7 @@ namespace Bit.Android
     public class MainActivity : FormsAppCompatActivity
     {
         private const string HockeyAppId = "d3834185b4a643479047b86c65293d42";
+        private DateTime? _lastAction;
 
         protected override void OnCreate(Bundle bundle)
         {
@@ -94,6 +96,12 @@ namespace Bit.Android
             {
                 MoveTaskToBack(true);
             });
+
+            MessagingCenter.Subscribe<Xamarin.Forms.Application, string>(
+                Xamarin.Forms.Application.Current, "LaunchApp", (sender, args) =>
+            {
+                LaunchApp(args);
+            });
         }
 
         private void ReturnCredentials(VaultListPageModel.Login login)
@@ -199,5 +207,26 @@ namespace Bit.Android
             var intent = new Intent(global::Android.Provider.Settings.ActionAccessibilitySettings);
             StartActivity(intent);
         }
+
+        private void LaunchApp(string packageName)
+        {
+            if(_lastAction.LastActionWasRecent())
+            {
+                return;
+            }
+            _lastAction = DateTime.UtcNow;
+
+            packageName = packageName.Replace("androidapp://", string.Empty);
+            var launchIntent = PackageManager.GetLaunchIntentForPackage(packageName);
+            if(launchIntent == null)
+            {
+                var dialog = Resolver.Resolve<IUserDialogs>();
+                dialog.Alert(string.Format(App.Resources.AppResources.CannotOpenApp, packageName));
+            }
+            else
+            {
+                StartActivity(launchIntent);
+            }
+        }
     }
 }

src/App/Models/Page/VaultViewLoginPageModel.cs

@@ -114,7 +114,18 @@ namespace Bit.App.Models.Page
         {
             get
             {
-                if(!ShowUri || !Uri.StartsWith("http"))
+                if(!ShowUri)
+                {
+                    return false;
+                }
+
+                if(Device.RuntimePlatform == Device.Android && !Uri.StartsWith("http") &&
+                    !Uri.StartsWith("androidapp://"))
+                {
+                    return false;
+                }
+
+                if(Device.RuntimePlatform != Device.Android && !Uri.StartsWith("http"))
                 {
                     return false;
                 }

src/App/Pages/Vault/VaultViewLoginPage.cs

@@ -75,7 +75,17 @@ namespace Bit.App.Pages
             UriCell = new LabeledValueCell(AppResources.Website, button1Text: AppResources.Launch);
             UriCell.Value.SetBinding(Label.TextProperty, nameof(VaultViewLoginPageModel.UriHost));
             UriCell.Button1.SetBinding(IsVisibleProperty, nameof(VaultViewLoginPageModel.ShowLaunch));
-            UriCell.Button1.Command = new Command(() => Device.OpenUri(new Uri(Model.Uri)));
+            UriCell.Button1.Command = new Command(() =>
+            {
+                if(Device.RuntimePlatform == Device.Android && Model.Uri.StartsWith("androidapp://"))
+                {
+                    MessagingCenter.Send(Application.Current, "LaunchApp", Model.Uri);
+                }
+                else if(Model.Uri.StartsWith("http://") || Model.Uri.StartsWith("https://"))
+                {
+                    Device.OpenUri(new Uri(Model.Uri));
+                }
+            });
 
             // Notes
             NotesCell = new LabeledValueCell();

src/App/Resources/AppResources.Designer.cs

@@ -394,6 +394,15 @@ namespace Bit.App.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Cannot open the app &quot;{0}&quot;..
+        /// </summary>
+        public static string CannotOpenApp {
+            get {
+                return ResourceManager.GetString("CannotOpenApp", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Change Email.
         /// </summary>

src/App/Resources/AppResources.resx

@@ -849,4 +849,8 @@
   <data name="AutofillAlwaysDescription" xml:space="preserve">
     <value>Always scan the screen for fields and only offer an auto-fill notification if password fields are found. This is the default setting.</value>
   </data>
+  <data name="CannotOpenApp" xml:space="preserve">
+    <value>Cannot open the app "{0}".</value>
+    <comment>Message shown when trying to launch an app that does not exist on the user's device.</comment>
+  </data>
 </root>