如何在Flutter中创建自定义视频播放器？

dependencies:
  flutter_video_player: ^0.10.0

import 'package:flutter_video_player/flutter_video_player.dart';

VideoPlayerController _controller;

@override
void initState() {
  super.initState();
  _controller = VideoPlayerController.network('视频URL');
  _controller.initialize().then((_) {
    setState(() {});
  });
}

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

@override
Widget build(BuildContext context) {
  return Scaffold(
    appBar: AppBar(
      title: Text('自定义视频播放器'),
    ),
    body: Center(
      child: _controller.value.initialized
          ? AspectRatio(
              aspectRatio: _controller.value.aspectRatio,
              child: VideoPlayer(_controller),
            )
          : CircularProgressIndicator(),
    ),
    floatingActionButton: FloatingActionButton(
      onPressed: () {
        setState(() {
          _controller.value.isPlaying
              ? _controller.pause()
              : _controller.play();
        });
      },
      child: Icon(
        _controller.value.isPlaying ? Icons.pause : Icons.play_arrow,
      ),
    ),
  );
}