Flutter Audioplayers 无法加载资源

Question

我正在尝试使用 flutter 的音频播放器库播放简单的声音。当我尝试时，出现无法加载资产错误。我已经在这个网站上解决了几个相关的问题，所有这些问题似乎都只建议检查pubspec.yaml文件上的缩进并运行flutter clean。我已经这样做了几次，但没有任何结果。Flutter Doctor没有发现任何问题。

当我单击应该导致播放声音的按钮时，我收到以下信息：

E/flutter (22727): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: Unable to load asset: assets/sounds/start.mp3
E/flutter (22727): #0      PlatformAssetBundle.load (package:flutter/src/services/asset_bundle.dart:221:7)
E/flutter (22727): <asynchronous suspension>
E/flutter (22727): #1      AudioCache._fetchAsset (package:audioplayers/audio_cache.dart:60:29)
E/flutter (22727): #2      AudioCache.fetchToMemory (package:audioplayers/audio_cache.dart:67:30)
E/flutter (22727): <asynchronous suspension>
E/flutter (22727): #3      AudioCache.load (package:audioplayers/audio_cache.dart:82:37)
E/flutter (22727): #4      AudioCache.getAbsoluteUrl (package:audioplayers/audio_cache.dart:140:23)
E/flutter (22727): #5      AudioCache.play (package:audioplayers/audio_cache.dart:103:24)
E/flutter (22727): #6      playSound (package:tick_tok_bio/player.dart:14:20)
E/flutter (22727): #7      MapsState.startNewRoute (package:tick_tok_bio/gps_tracking.dart:122:13)
E/flutter (22727): #8      MapsState.startStop.<anonymous closure> (package:tick_tok_bio/gps_tracking.dart:240:13)
E/flutter (22727): #9      _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:779:19)
E/flutter (22727): #10     _InkResponseState.build.<anonymous closure> (package:flutter/src/material/ink_well.dart:862:36)
E/flutter (22727): #11     GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:182:24)
E/flutter (22727): #12     TapGestureRecognizer.handleTapUp (package:flutter/src/gestures/tap.dart:504:11)
E/flutter (22727): #13     BaseTapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:282:5)
E/flutter (22727): #14     BaseTapGestureRecognizer.handlePrimaryPointer (package:flutter/src/gestures/tap.dart:217:7)
E/flutter (22727): #15     PrimaryPointerGestureRecognizer.handleEvent (package:flutter/src/gestures/recognizer.dart:475:9)
E/flutter (22727): #16     PointerRouter._dispatch (package:flutter/src/gestures/pointer_router.dart:76:12)
E/flutter (22727): #17     PointerRouter._dispatchEventToRoutes.<anonymous closure> (package:flutter/src/gestures/pointer_router.dart:122:9)
E/flutter (22727): #18     _LinkedHashMapMixin.forEach (dart:collection-patch/compact_hash.dart:379:8)
E/flutter (22727): #19     PointerRouter._dispatchEventToRoutes (package:flutter/src/gestures/pointer_router.dart:120:18)
E/flutter (22727): #20     PointerRouter.route (package:flutter/src/gestures/pointer_router.dart:106:7)
E/flutter (22727): #21     GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:218:19)
E/flutter (22727): #22     GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:198:22)
E/flutter (22727): #23     GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:156:7)
E/flutter (22727): #24     GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:102:7)
E/flutter (22727): #25     GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:86:7)
E/flutter (22727): #26     _rootRunUnary (dart:async/zone.dart:1196:13)
E/flutter (22727): #27     _CustomZone.runUnary (dart:async/zone.dart:1085:19)
E/flutter (22727): #28     _CustomZone.runUnaryGuarded (dart:async/zone.dart:987:7)
E/flutter (22727): #29     _invoke1 (dart:ui/hooks.dart:275:10)
E/flutter (22727): #30     _dispatchPointerDataPacket (dart:ui/hooks.dart:184:5)

这是应该播放音频文件的代码：

import 'package:audioplayers/audio_cache.dart';
import 'dart:async';
import 'package:audioplayers/audioplayers.dart';

AudioPlayer advancedPlayer;
AudioCache audioCache;

void initPlayer() {
  advancedPlayer = AudioPlayer();
  audioCache = AudioCache(fixedPlayer: advancedPlayer, prefix: 'sounds/');
}

Future<void> playSound(String path) async {
  await audioCache.play(path);
  return;
}

这里是调用方法的地方：

void initState() {
    super.initState();
    initPlayer();
}

void startNewRoute() async {
    await playSound('start.mp3');
    // more code here
}

这是pubspec.yaml的资产部分

flutter:
  uses-material-design: true

  assets:
    - images/
    - sounds/start.mp3

  fonts:
    - family: RobotoMono
      fonts:
        - asset: fonts/RobotoMono-Regular.ttf
        - asset: fonts/RobotoMono-Bold.ttf

这些文件的结构如下：

root
  lib
    [dart files]
  images
    [some images]
  sounds
    start.mp3

我找不到我在这里所做的事情与图书馆文档解释应该使用它的方式之间的任何差异。任何帮助表示赞赏，谢谢。

Answer 1

根据设计，您应该像这样添加“assets/”设置您的pubspec.yaml：

assets:
    - images/
    - assets/sounds/start.mp3

• 音频缓存官方文档在这里

不要忘记将这些文件添加到您的 pubspec.yaml 文件中：

颤振：资产：

• 资产/爆炸.mp3

有人在这里有类似的问题