An example of mixing and controlling multiple animations in Rive

bouncy_truck.dart

import 'package:flutter/material.dart';
import 'package:rive/rive.dart';

void main() => runApp(MaterialApp(
      home: BouncyTruckAnimation(),
    ));

class BouncyTruckAnimation extends StatefulWidget {
  const BouncyTruckAnimation({Key? key}) : super(key: key);

  @override
  _BouncyTruckAnimationState createState() => _BouncyTruckAnimationState();
}

class _BouncyTruckAnimationState extends State<BouncyTruckAnimation> {
  late RiveAnimationController _controller;

  @override
  void initState() {
    super.initState();
    _controller = OneShotAnimation('bounce', autoplay: false);
  }

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: GestureDetector(
          onTap: () => _controller.isActive = true,
          child: RiveAnimation.network(
            'https://cdn.rive.app/animations/vehicles.riv',
            animations: const ['idle', 'curves'],
            controllers: [_controller],
            fit: BoxFit.cover,
          ),
        ),
      ),
    );
  }
}