问题可能是由于你的audioplayers版本导致的，可以更新audioplayers的版本。下面是一种可能的解决方案: 升级audioplayer版本：

audioplayers: ^0.16.1

下面是一个在flutter中使用audioplayers包实现音频寻址的示例代码：

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

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {

  @override
  Widget build(BuildContext context) {

    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {

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

class _MyHomePageState extends State {

  AudioPlayer audioPlayer = AudioPlayer();

  String audioUrl = "https://test.example.com/example.mp3";

  playAudio() async {

    int result = await audioPlayer.play(audioUrl, isLocal: false);

    if (result == 1) {
      // success
      print("Audio is playing.");
    } else {
      // failure
      print("Error occurred while playing audio.");
    }

  }

  @override
  Widget build(BuildContext context) {

    return Scaffold(
      appBar: AppBar(
        title: Text("Audio Player"),
      ),
      body: Center(
        child: RaisedButton(
          child: Text("Play Audio"),
          onPressed: playAudio,
        ),
      ),
    );
  }
}