Flutter Build Fails: InAppWebView error: package okhttp3 does not exist

Posted 2023-05-07

【中文标题】Flutter Build Fails: InAppWebView error: package okhttp3 does not exist

【英文标题】：

【发布时间】：2021-10-01 21:10:15

【问题描述】：

说明 添加 youtube_player_flutter v8.0.0（链接：https://github.com/sarbagyastha/youtube_player_flutter）时，Flutter (android) 应用无法构建并显示以下错误日志：

C:\flutter\.pub-cache\hosted\pub.dartlang.org\flutter_inappwebview-5.3.2\android\src\main\java\com\pichillilorenzo\flutter_inappwebview\in_app_webview\InAppWebView.java:97: error: package okhttp3 does not exist
import okhttp3.OkHttpClient;
              ^
C:\flutter\.pub-cache\hosted\pub.dartlang.org\flutter_inappwebview-5.3.2\android\src\main\java\com\pichillilorenzo\flutter_inappwebview\in_app_webview\InAppWebView.java:121: error: cannot find symbol

  public OkHttpClient httpClient;
         ^
  symbol:   class OkHttpClient
  location: class InAppWebView
C:\flutter\.pub-cache\hosted\pub.dartlang.org\flutter_inappwebview-5.3.2\android\src\main\java\com\pichillilorenzo\flutter_inappwebview\content_blocker\ContentBlockerHandler.java:24: error: package okhttp3 does not exist
import okhttp3.Request;
              ^
C:\flutter\.pub-cache\hosted\pub.dartlang.org\flutter_inappwebview-5.3.2\android\src\main\java\com\pichillilorenzo\flutter_inappwebview\content_blocker\ContentBlockerHandler.java:25: error: package okhttp3 does not exist
import okhttp3.Response;
              ^
C:\flutter\.pub-cache\hosted\pub.dartlang.org\flutter_inappwebview-5.3.2\android\src\main\java\com\pichillilorenzo\flutter_inappwebview\Util.java:46: error: package okhttp3 does not exist

import okhttp3.OkHttpClient;
              ^
C:\flutter\.pub-cache\hosted\pub.dartlang.org\flutter_inappwebview-5.3.2\android\src\main\java\com\pichillilorenzo\flutter_inappwebview\Util.java:175: error: cannot find symbol
  public static OkHttpClient getUnsafeOkHttpClient() 
                ^
  symbol:   class OkHttpClient
  location: class Util
C:\flutter\.pub-cache\hosted\pub.dartlang.org\flutter_inappwebview-5.3.2\android\src\main\java\com\pichillilorenzo\flutter_inappwebview\in_app_webview\InAppWebView.java:184: error: cannot find symbol
    httpClient = new OkHttpClient().newBuilder().build();
                     ^
  symbol:   class OkHttpClient
  location: class InAppWebView
C:\flutter\.pub-cache\hosted\pub.dartlang.org\flutter_inappwebview-5.3.2\android\src\main\java\com\pichillilorenzo\flutter_inappwebview\content_blocker\ContentBlockerHandler.java:180: error: cannot find symbol
                            Request mRequest = new Request.Builder().url(urlHttps).build();
                            ^
  symbol:   class Request
  location: class ContentBlockerHandler
C:\flutter\.pub-cache\hosted\pub.dartlang.org\flutter_inappwebview-5.3.2\android\src\main\java\com\pichillilorenzo\flutter_inappwebview\content_blocker\ContentBlockerHandler.java:180: error: package Request does not exist

                            Request mRequest = new Request.Builder().url(urlHttps).build();
                                                          ^
C:\flutter\.pub-cache\hosted\pub.dartlang.org\flutter_inappwebview-5.3.2\android\src\main\java\com\pichillilorenzo\flutter_inappwebview\content_blocker\ContentBlockerHandler.java:181: error: cannot find symbol
                            Response response = null;
                            ^
  symbol:   class Response
  location: class ContentBlockerHandler
C:\flutter\.pub-cache\hosted\pub.dartlang.org\flutter_inappwebview-5.3.2\android\src\main\java\com\pichillilorenzo\flutter_inappwebview\content_blocker\ContentBlockerHandler.java:231: error: cannot find symbol
            Request mRequest = new Request.Builder().url(url).head().build();
            ^
  symbol:   class Request
  location: class ContentBlockerHandler
C:\flutter\.pub-cache\hosted\pub.dartlang.org\flutter_inappwebview-5.3.2\android\src\main\java\com\pichillilorenzo\flutter_inappwebview\content_blocker\ContentBlockerHandler.java:231: error: package Request does not exist
            Request mRequest = new Request.Builder().url(url).head().build();

                                          ^
C:\flutter\.pub-cache\hosted\pub.dartlang.org\flutter_inappwebview-5.3.2\android\src\main\java\com\pichillilorenzo\flutter_inappwebview\content_blocker\ContentBlockerHandler.java:232: error: cannot find symbol

            Response response = null;
            ^
  symbol:   class Response
  location: class ContentBlockerHandler
C:\flutter\.pub-cache\hosted\pub.dartlang.org\flutter_inappwebview-5.3.2\android\src\main\java\com\pichillilorenzo\flutter_inappwebview\Util.java:201: error: package OkHttpClient does not exist
      OkHttpClient.Builder builder = new OkHttpClient.Builder();
                  ^
C:\flutter\.pub-cache\hosted\pub.dartlang.org\flutter_inappwebview-5.3.2\android\src\main\java\com\pichillilorenzo\flutter_inappwebview\Util.java:201: error: package OkHttpClient does not exist

      OkHttpClient.Builder builder = new OkHttpClient.Builder();
                                                     ^
C:\flutter\.pub-cache\hosted\pub.dartlang.org\flutter_inappwebview-5.3.2\android\src\main\java\com\pichillilorenzo\flutter_inappwebview\Util.java:210: error: cannot find symbol
      OkHttpClient okHttpClient = builder
      ^
  symbol:   class OkHttpClient
  location: class Util
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
16 errors

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':flutter_inappwebview:compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output for details.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org
BUILD FAILED in 27s
Exception: Gradle task assembleDebug failed with exit code 1
Exited (sigterm)

配置 我有以下配置：

颤振医生输出：

[√] Flutter (Channel master, 2.3.0-17.0.pre.411, on Microsoft Windows [Version 10.0.19042.1052], locale en-IN)
[√] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
[√] Chrome - develop for the web
[√] Android Studio (version 4.0)
[√] VS Code (version 1.57.1)
[√] Connected device (3 available)

---

Pubspec.yaml：

environment:
  sdk: ">=2.12.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter

  cupertino_icons: ^1.0.1
  get_it:
  google_fonts: ^2.1.0
  shimmer: ^2.0.0
  lottie: ^1.0.1
  stacked: ^2.1.9
  firebase_core: ^1.4.0
  cloud_firestore: ^2.4.0
  firebase_auth: ^3.0.1
  firebase_analytics: ^8.2.0
  pin_code_fields: ^7.2.0
  geolocator: ^7.1.0
  google_maps_flutter: ^2.0.6
  geocoding: ^2.0.0
  url_launcher: ^6.0.6
  rflutter_alert: ^2.0.2
  sms_autofill: ^2.0.0
  carousel_slider: ^4.0.0
  razorpay_flutter: ^1.2.6
  flutter_tts: ^3.1.0
  intl: ^0.17.0
  webview_flutter: ^2.0.8
  flutter_icons:
    git:
      url: https://github.com/adarsh-technocrat/flutter-icons
  timelines: ^0.1.0
  scrollable_positioned_list: ^0.1.10
  in_app_review: ^2.0.2
  share: ^2.0.4
  connectivity: ^3.0.6
  cached_network_image: ^3.0.0
  youtube_player_flutter: ^8.0.0

dev_dependencies:
  flutter_test:
    sdk: flutter
  flutter_launcher_icons: "^0.9.0"

---

Build.gradle 文件：

buildscript 
    ext.kotlin_version = '1.3.50'
    repositories 
        google()
        jcenter()
    

    dependencies 
        classpath 'com.android.tools.build:gradle:4.1.2'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.google.gms:google-services:4.3.5'
    


allprojects 
    repositories 
        google()
        jcenter()
    


rootProject.buildDir = '../build'
subprojects 
    project.buildDir = "$rootProject.buildDir/$project.name"

subprojects 
    project.evaluationDependsOn(':app')


task clean(type: Delete) 
    delete rootProject.buildDir

---

技术细节：

设备：ASUS Z01RD（手机） 操作系统：Android Android 10 版本

已经尝试过的解决方案

我已经在网上搜索了很多解决方案，也尝试了一些我自己的技巧，但都是徒劳的。

这是相同的列表：

尝试了这里提到的解决方案：https://github.com/sarbagyastha/youtube_player_flutter/issues/490 我尝试升级 gradle 版本。 我尝试运行全新安装。 我尝试将整个应用程序升级为空安全，因此使用environment: sdk: ">=2.12.0 <3.0.0" 尝试通过 pubspec.yaml 显式安装 flutter_inappwebview 插件。 尝试删除一些我认为可能存在冲突的其他现有依赖项（例如 webview_flutter 插件）。 已尝试将所有依赖项列表升级到最新版本。

【参考方案1】：

安装Java 8，因为它是推荐且稳定的。确保 JRE 和 JDK 都应该是版本 8。卸载您已安装的任何其他版本。