How do I play a Rive Animation in flutter - flutter

Question

I am new to Rive and because there is close to no good documentation for Rive 2 I wanted to ask here. How do I play my Rive Animation in flutter? I copy + pasted the example that was on pub.dev for the rive dependecy and switched out their animation name to mine, but it just shows me a weird freezeframe of my animation. This is the code:
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:rive/rive.dart';
void main() => runApp(MyApp());
class MyApp extends StatefulWidget {
#override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> with SingleTickerProviderStateMixin {
#override
Widget build(BuildContext context) {
return const MaterialApp(
home: MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({Key key}) : super(key: key);
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
void _togglePlay() {
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/file.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;
// 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(
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,
),
),
);
}
}

Answer 1

You might need to change the name of the animation you want to play from your Rive file.
This line:
artboard.addController(_controller = SimpleAnimation('idle'));
attempts to play an animation called 'idle'. If you animation is named differently, try replacing the name here.
This blog post has more info on using Rive with Flutter.

Answer 2

final url = Uri.parse(
'https://raw.githubusercontent.com/rive-app/rive-flutter/master/example/assets/liquid_download.riv');
final res = await http.get(url);
final file = RiveFile.import(res.bodyBytes.buffer.asByteData());
// rootBundle.load('assets/file.riv')