【发布时间】：2020-10-12 20:39:26
【问题描述】：
我正在尝试使用颤振的音频播放器库播放简单的声音。当我尝试这样做时，我收到 无法加载资产 错误。我在这个网站上浏览了几个相关的问题，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。
当我单击应该导致声音播放的按钮时，我会收到以下信息：
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
文件的结构如下：
root
lib
[dart files]
images
[some images]
sounds
start.mp3
我在此处所做的操作与库文档解释它应该使用的方式之间没有任何差异。任何帮助表示赞赏，谢谢。
【问题讨论】：
标签： android ios flutter assets flutter-dependencies