无法加载资产:加载.mp3文件时出错 [英] Unable to load asset: error when loading an .mp3 file Flutter

问题描述

我正在使用audioplayers包将声音添加到我的应用程序中，但在最初的构建中没有声音播放.在加载文件时重新启动面团后，出现此异常:

I'm adding sounds to my app using the audioplayers package but at first build no sound is played. After a Hot-restart dough when loading the file I get this exception:

E/flutter (32175): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: Unable to load asset: assets/assets/click.mp3
E/flutter (32175): #0      PlatformAssetBundle.load (package:flutter/src/services/asset_bundle.dart:221:7)
E/flutter (32175): <asynchronous suspension>
E/flutter (32175): #1      AudioCache._fetchAsset (package:audioplayers/audio_cache.dart:60:29)
E/flutter (32175): #2      AudioCache.fetchToMemory (package:audioplayers/audio_cache.dart:67:30)
E/flutter (32175): <asynchronous suspension>
E/flutter (32175): #3      AudioCache.load (package:audioplayers/audio_cache.dart:82:37)
E/flutter (32175): #4      AudioCache.getAbsoluteUrl (package:audioplayers/audio_cache.dart:140:23)
E/flutter (32175): #5      AudioCache.play (package:audioplayers/audio_cache.dart:103:24)
E/flutter (32175): #6      _MapScreenState.build.<anonymous closure> (package:fixit_cloud_biking/Screens/map_screen.dart:1239:46)
E/flutter (32175): #7      _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:706:14)
E/flutter (32175): #8      _InkResponseState.build.<anonymous closure> (package:flutter/src/material/ink_well.dart:789:36)
E/flutter (32175): #9      GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:182:24)
E/flutter (32175): #10     TapGestureRecognizer.handleTapUp (package:flutter/src/gestures/tap.dart:486:11)
E/flutter (32175): #11     BaseTapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:264:5)
E/flutter (32175): #12     BaseTapGestureRecognizer.handlePrimaryPointer (package:flutter/src/gestures/tap.dart:199:7)
E/flutter (32175): #13     PrimaryPointerGestureRecognizer.handleEvent (package:flutter/src/gestures/recognizer.dart:467:9)
E/flutter (32175): #14     PointerRouter._dispatch (package:flutter/src/gestures/pointer_router.dart:76:12)
E/flutter (32175): #15     PointerRouter._dispatchEventToRoutes.<anonymous closure> (package:flutter/src/gestures/pointer_router.dart:117:9)
E/flutter (32175): #16     _LinkedHashMapMixin.forEach (dart:collection-patch/compact_hash.dart:379:8)
E/flutter (32175): #17     PointerRouter._dispatchEventToRoutes (package:flutter/src/gestures/pointer_router.dart:115:18)
E/flutter (32175): #18     PointerRouter.route (package:flutter/src/gestures/pointer_router.dart:101:7)
E/flutter (32175): #19     GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:218:19)
E/flutter (32175): #20     GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:198:22)
E/flutter (32175): #21     GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:156:7)
E/flutter (32175): #22     GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:102:7)
E/flutter (32175): #23     GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:86:7)
E/flutter (32175): #24     _rootRunUnary (dart:async/zone.dart:1138:13)
E/flutter (32175): #25     _CustomZone.runUnary (dart:async/zone.dart:1031:19)
E/flutter (32175): #26     _CustomZone.runUnaryGuarded (dart:async/zone.dart:933:7)
E/flutter (32175): #27     _invoke1 (dart:ui/hooks.dart:273:10)
E/flutter (32175): #28     _dispatchPointerDataPacket (dart:ui/hooks.dart:182:5)
E/flutter (32175): 

我确实将文件放在了包含用于图标的所有图像的同一资源文件夹中，因此pubspec.yaml文件中的缩进是正确的. 问题不应该是文件命名，无论是我使用驼峰式大小写还是单个单词命名(从使用空空格命名的图像中汲取的教训..). 值得一提的是，如果我将文件拖放到assets文件夹中，则会出现错误.我尝试删除该文件夹，然后重新创建它，然后进行拖放操作，但是第二次添加仅一次..文件会引发错误. 这是应该播放声音的按钮:

I did put the files in the same assets folder that contains all the images I use for the icons so indentation in pubspec.yaml file is correct. The problem shouldn't be the file naming either as I use camel cased or single word naming(lesson learned from images naming with empty spaces..). One thing though worth to mention is that if I drag and drop files onto the assetsfolder I get an error. I tried deleting the folder, recreating it and then drag and drop works, but only once.. files added in a second moment throw the error. This is the button that should play the sound:

IconButton(
                        icon: Image.asset('assets/centerMapButton.png'),
                        iconSize: 60,
                        onPressed: () async {
                          await widget.cache.play('assets/click.mp3',
                              volume: 50, mode: PlayerMode.MEDIA_PLAYER);
                          print('Center map button pressed');
                          _mapController.move(userLocation, 16);
                        }),

和AudioCache()声明为AudioCache cache = new AudioCache();.

推荐答案

请尝试更改此内容 资产/click.mp3 到 click.mp3

TRY CHANGING THIS assets/click.mp3 TO click.mp3

我忽略了路径中的"assets/"，使它无缝地播放本地声音，我也遇到了同样的错误.音频播放器假定其默认路径为asset/

I had the same error neglecting the "assets/" in the path makes it play sounds from local seamlessly. Audioplayers assumes that its default path is assets/

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