Question

我的Flutter应用程序在启动屏幕上冻结，并且出现以下错误日志：

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 (!)

问题出在这里： [错误：flutter / lib / ui / ui_dart_state.cc（148）]未处理的异常：MissingPluginException（在通道plugins.flutter.io/path_provider上未找到方法getApplicationDocumentsDirectory的实现）

已经做到了：

-删除了所有插件，并使用flutter pub get重新安装。
-运行的flutter clean和flutter run

Answer 1

Flutter for Web

在开始向应用程序添加Web支持之后，我遇到了这个问题。 getApplicationDocumentsDirectory（）函数仅支持iOS和Android (docs)。我添加了一个针对Web的检查，并更改了设置目录的方式，该目录为我修复了“找不到方法的实现”。

要判断平台是否为Web，请使用Flutter的kIsWeb：

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

然后处理相应地设置目录：

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

Answer 2

当您获得一个插件并且不再重新构建应用程序时，通常会发生此错误。如果是这种情况，请在pubspec.yaml上获取插件后，重新安装apk。如果这不是您的问题，您是否使用kotlin和swift的suport创建了项目？我不知道是否是这种情况，但是大多数插件都需要

Answer 3

原来，我不得不退出flutter运行过程，然后再次启动。只是在颤动下完全重启是行不通的。

这里是参考链接https://github.com/flutter/flutter/issues/10912

编辑：请确保您导入了这些软件包；

package：path_provider / path_provider.dart
dart：io
dart：async

Answer 4

对我有用的是在Application.java（或Application.kt）中注册相应的插件方法通道。所以是这样的：

package com.example.lifely;

import io.flutter.app.FlutterApplication;
import io.flutter.plugin.common.PluginRegistry;
import io.flutter.plugin.common.PluginRegistry.PluginRegistrantCallback;
import io.flutter.plugins.GeneratedPluginRegistrant;
import io.flutter.plugins.pathprovider.PathProviderPlugin;

public class Application extends FlutterApplication implements PluginRegistrantCallback {
  @Override
  public void registerWith(PluginRegistry registry) {
    PathProviderPlugin.registerWith(registry.registrarFor("io.flutter.plugins.pathprovider.PathProviderPlugin"));
  }
}

Answer 5

如果您的软件包依赖于 flutter_facebook_auth，您需要确保您已经为 Android 和 iOS 执行了设置以消除错误。我正在使用 Hive 和 Facebook 登录，但令人惊讶的是，缺少 Facebook 设置导致 Hive.initFlutter() 抛出此错误。

即使您的 Facebook 开发者帐户中实际上没有设置 Facebook 应用程序，此修复程序也会起作用。

Answer 6

我在构建发行版APK后收到了针对其他插件的错误消息，这是因为默认情况下启用了代码收缩功能-如果您不想缩小/混淆代码，只需在android / app / build.gradle中添加两行即可。

android {
    ...

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

Answer 7

您只需要重新安装应用程序

或

您可以使用 https://pub.dev/packages/permission_handler 运行时管理权限

通常，当您在 AndroidManifest.xml 文件中提到权限时，它会在应用首次启动时请求权限，这就是您需要重新安装应用或从权限管理器授予权限的原因，或者您可以使用上述包从您的应用动态处理它

Answer 8

在我的缓存中，我删除了cached_network_image并将其替换为Image.network，问题消失了

Answer 9

就我而言，我没有包括dart：async包。运行“ flutter run”并包含“ dart：async”包即可解决问题

Answer 10

对于我来说，我的AndroidManifest.xml文件中缺少以下代码段。

        <meta-data
            android:name="flutterEmbedding"
            android:value="2" />

将其添加到AndroidManifest.xml文件中即可解决此问题。

Answer 11

在1.12之前的Android项目升级后！！

如果您没有太多时间尝试编辑步骤5的AppDelegate.h

我在更新后通过遵循以下指南：Upgrading-pre-1.12-Android-projects进行以下操作：

将flutter更新到其最新的稳定版本-> flutter clean丢失
更新所有依赖项（软件包很可能具有或要求您添加新方法）->清理干净不是太多
更新由软件包更新产生的代码和方法
尝试运行flutter或从android Studio |>（某些程序包可能会向您发送missingPluginException，但如果它已安装在移动设备上），请转到步骤5。
如果可以的话，构建适用于android和IOS的测试安装（它们应该工作正常）。在使用flutter运行的开发中，它很可能继续发送错误，在我的情况下，我无法在IOS中进行测试，但是使用flutter run，它可以同时在android和IOS上运行，并且可以通过将其添加到ios / Runner / AppDelegate来解决问题。 h-> [GeneratedPluginRegistrant registerWithRegistry：self];

#import #import

@interface AppDelegate：FlutterAppDelegate [GeneratedPluginRegistrant registerWithRegistry：self]; @EnD

如果在这些步骤之后无法在步骤4 0 5中执行，请验证其他依赖项是否未更新其版本以与Upgradeing-1.12-Android-projects！兼容。例如，cached_network_image使用path_provider尝试卸载cached_network_image软件包再次从第4步开始重复。

Answer 12

转到项目位置的终端，然后输入以下命令

flutter clean

然后重新运行项目。这对我有用

在通道plugins.flutter.io/path_provider上未找到方法getApplicationDocumentsDirectory的实现

12 个答案: