WIP on simplifying controller use

example/lib/example_animation.dart

@@ -1,67 +0,0 @@
-import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
-import 'package:rive/rive.dart';
-
-class ExampleAnimation extends StatefulWidget {
-  const ExampleAnimation({Key? key}) : super(key: key);
-
-  @override
-  _ExampleAnimationState createState() => _ExampleAnimationState();
-}
-
-class _ExampleAnimationState extends State<ExampleAnimation> {
-  void _togglePlay() {
-    if (_controller == null) {
-      return;
-    }
-    setState(() => _controller!.isActive = !_controller!.isActive);
-  }
-
-  /// Tracks if the animation is playing by whether controller is running.
-  bool get isPlaying => _controller?.isActive ?? false;
-
-  Artboard? _riveArtboard;
-  RiveAnimationController? _controller;
-  @override
-  void initState() {
-    super.initState();
-
-    // Load the animation file from the bundle, note that you could also
-    // download this. The RiveFile just expects a list of bytes.
-    rootBundle.load('assets/off_road_car.riv').then(
-      (data) async {
-        // Load the RiveFile from the binary data.
-        final file = RiveFile.import(data);
-
-        // The artboard is the root of the animation and gets drawn in the
-        // Rive widget.
-        final artboard = file.mainArtboard.instance();
-        // Add a controller to play back a known animation on the main/default
-        // artboard. We store a reference to it so we can toggle playback.
-        artboard.addController(_controller = SimpleAnimation('idle'));
-        setState(() => _riveArtboard = artboard);
-      },
-    );
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      appBar: AppBar(
-        title: const Text('Animation Example'),
-      ),
-      body: Center(
-        child: _riveArtboard == null
-            ? const SizedBox()
-            : Rive(artboard: _riveArtboard!),
-      ),
-      floatingActionButton: FloatingActionButton(
-        onPressed: _togglePlay,
-        tooltip: isPlaying ? 'Pause' : 'Play',
-        child: Icon(
-          isPlaying ? Icons.pause : Icons.play_arrow,
-        ),
-      ),
-    );
-  }
-}

example/lib/main.dart

@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:rive_example/example_animation.dart';
+import 'package:rive_example/play_pause_animation.dart';
 import 'package:rive_example/example_state_machine.dart';
 import 'package:rive_example/liquid_download.dart';
 import 'package:rive_example/little_machine.dart';
@@ -42,7 +42,7 @@ class Home extends StatelessWidget {
                 Navigator.push(
                   context,
                   MaterialPageRoute<void>(
-                    builder: (context) => const ExampleAnimation(),
+                    builder: (context) => const PlayPauseAnimation(),
                   ),
                 );
               },

example/lib/play_pause_animation.dart

@@ -0,0 +1,50 @@
+import 'package:flutter/material.dart';
+import 'package:rive/rive.dart';
+
+class PlayPauseAnimation extends StatefulWidget {
+  const PlayPauseAnimation({Key? key}) : super(key: key);
+
+  @override
+  _PlayPauseAnimationState createState() => _PlayPauseAnimationState();
+}
+
+class _PlayPauseAnimationState extends State<PlayPauseAnimation> {
+  // Controller for playback
+  late RiveAnimationController _controller;
+
+  // This will toggle between play and pause states for the animation
+  void _togglePlay() {
+    setState(() => _controller.isActive = !_controller.isActive);
+  }
+
+  /// Tracks if the animation is playing by whether controller is running.
+  bool get isPlaying => _controller.isActive;
+
+  @override
+  void initState() {
+    super.initState();
+    _controller = SimpleAnimation('idle');
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text('Animation Example'),
+      ),
+      body: Center(
+        child: RiveControllerAnimation.network(
+          'https://cdn.rive.app/animations/vehicles.riv',
+          controllers: [_controller],
+        ),
+      ),
+      floatingActionButton: FloatingActionButton(
+        onPressed: _togglePlay,
+        tooltip: isPlaying ? 'Pause' : 'Play',
+        child: Icon(
+          isPlaying ? Icons.pause : Icons.play_arrow,
+        ),
+      ),
+    );
+  }
+}