在通道插件上未找到方法getApplicationDocumentsDirectory的实现。颤振io/path\U提供程序

Question

我的颤振应用程序在启动屏幕上冻结，我得到以下错误日志：

Built build\app\outputs\apk\debug\app-debug.apk.
I/Choreographer(18870): Skipped 75 frames!  The application may be doing too much work on its main thread.
D/EGL_emulation(18870): eglMakeCurrent: 0xe8885480: ver 3 0 (tinfo 0xe88835a0)
I/OpenGLRenderer(18870): Davey! duration=2142ms; Flags=1, IntendedVsync=65263803118670, Vsync=65265053118620, OldestInputEvent=9223372036854775807, NewestInputEvent=0, HandleInputStart=65265065657900, AnimationStart=65265065738100, PerformTraversalsStart=65265065780200, DrawStart=65265126086300, SyncQueued=65265197367200, SyncStart=65265199471900, IssueDrawCommandsStart=65265199680700, SwapBuffers=65265651453000, FrameCompleted=65265947767800, DequeueBufferDuration=12659000, QueueBufferDuration=920000,
Syncing files to device Android SDK built for x86...
E/flutter (18870): [ERROR:flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: MissingPluginException(No implementation found for method getApplicationDocumentsDirectory on channel plugins.flutter.io/path_provider)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #0      MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:314:7)
Syncing files to device Android SDK built for x86...
E/flutter (18870): <asynchronous suspension>
Syncing files to device Android SDK built for x86...
E/flutter (18870): #1      getApplicationDocumentsDirectory (package:path_provider/path_provider.dart:84:22)
Syncing files to device Android SDK built for x86...
E/flutter (18870): <asynchronous suspension>
Syncing files to device Android SDK built for x86...
E/flutter (18870): #2      DbContext.initDb (package:appentrega/database.dart:34:45)
Syncing files to device Android SDK built for x86...
E/flutter (18870): <asynchronous suspension>
Syncing files to device Android SDK built for x86...
E/flutter (18870): #3      DbContext.getContext (package:appentrega/database.dart:27:21)
Syncing files to device Android SDK built for x86...
E/flutter (18870): <asynchronous suspension>
Syncing files to device Android SDK built for x86...
E/flutter (18870): #4      _SplashScreenState.startTime (package:appentrega/splash.dart:16:34)
Syncing files to device Android SDK built for x86...
E/flutter (18870): <asynchronous suspension>
Syncing files to device Android SDK built for x86...
E/flutter (18870): #5      _SplashScreenState.initState (package:appentrega/splash.dart:33:5)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #6      StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4068:58)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #7      ComponentElement.mount (package:flutter/src/widgets/framework.dart:3919:5)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #8      Element.inflateWidget (package:flutter/src/widgets/framework.dart:3101:14)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #9      Element.updateChild (package:flutter/src/widgets/framework.dart:2904:12)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #10     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5127:14)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #11     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3101:14)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #12     Element.updateChild (package:flutter/src/widgets/framework.dart:2904:12)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #13     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3961:16)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #14     Element.rebuild (package:flutter/src/widgets/framework.dart:3738:5)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #15     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3924:5)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #16     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3919:5)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #17     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3101:14)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #18     Element.updateChild (package:flutter/src/widgets/framework.dart:2904:12)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #19     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5127:14)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #20     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3101:14)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #21     Element.updateChild (package:flutter/src/widgets/framework.dart:2904:12)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #22     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5127:14)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #23     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3101:14)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #24     Element.updateChild (package:flutter/src/widgets/framework.dart:2904:12)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #25     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5127:14)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #26     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3101:14)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #27     Element.updateChild (package:flutter/src/widgets/framework.dart:2904:12)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #28     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5127:14)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #29     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3101:14)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #30     Element.updateChild (package:flutter/src/widgets/framework.dart:2904:12)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #31     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3961:16)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #32     Element.rebuild (package:flutter/src/widgets/framework.dart:3738:5)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #33     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3924:5)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #34     StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4088:11)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #35     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3919:5)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #36     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3101:14)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #37     Element.updateChild (package:flutter/src/widgets/framework.dart:2904:12)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #38     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3961:16)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #39     Element.rebuild (package:flutter/src/widgets/framework.dart:3738:5)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #40     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3924:5)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #41     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3919:5)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #42     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3101:14)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #43     Element.updateChild (package:flutter/src/widgets/framework.dart:2904:12)
Syncing files to device Android SDK built for x86...
E/flutter (18870): #44
Syncing files to device Android SDK built for x86...
D/EGL_emulation(18870): eglMakeCurrent: 0xe8885720: ver 3 0 (tinfo 0xe88832f0)
Syncing files to device Android SDK built for x86...
 4.034ms (!)

看起来问题就在这里：[ERROR： flutter/lib/ui/ui_dart_state.cc（148）]未处理的异常：缺少插件异常（在通道plugins.flutter.io/path_provider上没有找到方法getApplication ationDocumentsDirectory的实现）

已经这样做了：

-删除了所有插件并重新安装了flutter pub get。
-运行flutter net和flutter run

Answer 1

网页的颤动

在开始向应用程序添加web支持后，我遇到了这种情况。getApplicationDocumentsDirectory（）函数仅支持iOS和Android（文档）。我添加了一个web检查，并更改了设置目录的方式，从而为我修复了“找不到方法的实现”。

要判断平台是否为web，请使用颤振的kIsWeb：

import 'package:flutter/foundation.dart' show kIsWeb;

然后处理相应的目录设置：

if (kIsWeb) {
    // Set web-specific directory
} else {
    appDocumentDirectory = await path_provider.getApplicationDocumentsDirectory();
}

Answer 2

在构建发布版apk后，我在另一个插件中遇到了这个错误，这是因为默认情况下启用了代码收缩功能-如果你不想缩小/模糊代码，只需在android/app/build中添加两行代码即可。格拉德尔。

android {
    ...

    buildTypes {
        release {
            ...
         
            shrinkResources false
            minifyEnabled false
        }
    }
}

Answer 3

此错误通常发生在您获得插件而不再构建应用程序时。如果这是你在pubspec上获得插件后的情况。yaml重新安装您的apk。如果这不是您的问题，您是否为kotlin和swift创建了支持项目？我不知道情况是否如此，但大多数插件都需要这样做