Take GlobalKey<NavigatorState> instead of BuildContext

example/lib/components/app/app_component.dart

@@ -35,6 +35,7 @@ class AppComponentState extends State<AppComponent> {
         primarySwatch: Colors.blue,
       ),
       onGenerateRoute: Application.router.generator,
+      navigatorKey: Application.routerKey,
     );
 //    print("initial route = ${app.initialRoute}");
     return app;

example/lib/components/home/home_component.dart

@@ -232,10 +232,10 @@ class HomeComponentState extends State<HomeComponent> {
       }
 
       Application.router
-          .navigateTo(context, route, transition: transitionType)
+          .navigateTo(Application.routerKey, route, transition: transitionType)
           .then((result) {
         if (key == "pop-result") {
-          Application.router.navigateTo(context, "/demo/func?message=$result");
+          Application.router.navigateTo(Application.routerKey, "/demo/func?message=$result");
         }
       });
     } else if (key == "custom") {
@@ -253,7 +253,7 @@ class HomeComponentState extends State<HomeComponent> {
         );
       };
       Application.router.navigateTo(
-        context,
+        Application.routerKey,
         "/demo?message=$message&color_hex=$hexCode",
         transition: TransitionType.custom,
         transitionBuilder: transition,
@@ -261,10 +261,10 @@ class HomeComponentState extends State<HomeComponent> {
       );
     } else if (key == "fixed-trans") {
       Application.router.navigateTo(
-          context, "/demo/fixedtrans?message=Hello!&color_hex=#f4424b");
+          Application.routerKey, "/demo/fixedtrans?message=Hello!&color_hex=#f4424b");
     } else {
       message = "You tapped the function button!";
-      Application.router.navigateTo(context, "/demo/func?message=$message");
+      Application.router.navigateTo(Application.routerKey, "/demo/func?message=$message");
     }
   }
 }

example/lib/config/application.dart

@@ -7,7 +7,10 @@
  * See LICENSE for distribution and usage details.
  */
 import 'package:fluro/fluro.dart';
+import 'package:flutter/material.dart';
 
 class Application {
   static Router router;
+
+  static GlobalKey<NavigatorState> routerKey = GlobalKey<NavigatorState>();
 }

lib/src/router.dart

@@ -38,16 +38,16 @@ class Router {
     return _routeTree.matchRoute(path);
   }
 
-  void pop(BuildContext context) => Navigator.pop(context);
+  void pop(GlobalKey<NavigatorState> key) => key.currentState.pop();
 
   ///
-  Future navigateTo(BuildContext context, String path,
+  Future navigateTo(GlobalKey<NavigatorState> key, String path,
       {bool replace = false,
       bool clearStack = false,
       TransitionType transition,
       Duration transitionDuration = const Duration(milliseconds: 250),
       RouteTransitionsBuilder transitionBuilder}) {
-    RouteMatch routeMatch = matchRoute(context, path,
+    RouteMatch routeMatch = matchRoute(key.currentContext, path,
         transitionType: transition,
         transitionsBuilder: transitionBuilder,
         transitionDuration: transitionDuration);
@@ -58,16 +58,16 @@ class Router {
       completer.complete("Non visual route type.");
     } else {
       if (route == null && notFoundHandler != null) {
-        route = _notFoundRoute(context, path);
+        route = _notFoundRoute(path);
       }
       if (route != null) {
         if (clearStack) {
           future =
-              Navigator.pushAndRemoveUntil(context, route, (check) => false);
+              key.currentState.pushAndRemoveUntil(route, (check) => false);
         } else {
           future = replace
-              ? Navigator.pushReplacement(context, route)
+              ? key.currentState.pushReplacement(route)
-              : Navigator.push(context, route);
+              : key.currentState.push(route);
         }
         completer.complete();
       } else {
@@ -81,7 +81,7 @@ class Router {
   }
 
   ///
-  Route<Null> _notFoundRoute(BuildContext context, String path) {
+  Route<Null> _notFoundRoute(String path) {
     RouteCreator<Null> creator =
         (RouteSettings routeSettings, Map<String, List<String>> parameters) {
       return MaterialPageRoute<Null>(