Flutter InAppWebView在Android加载URL报ERR_INVALID_RESPONSE，iOS正常

我使用flutter_inappwebview作为Flutter WebView的封装，此前主要在iOS模拟器开发应用，升级Flutter到最新稳定版后，Android模拟器测试时无法正常加载网页，报ERR_INVALID_RESPONSE错误。升级前Android和iOS均能正常运行，目前iOS仍可正常使用，HTTP请求、flutter_inappwebview的Headless Browser也能正常工作，仅InAppWebView组件失效。

设备信息 #

Apple M3 Pro
macOS 14.4 (23E214)

Flutter版本 #

Flutter 3.19.3 • channel stable • https://github.com/flutter/flutter.git
Framework • revision ba39319843 (2周前) • 2024-03-07 15:22:21 -0600
Engine • revision 2e4ba9c6fb
Tools • Dart 3.3.1 • DevTools 2.31.1

InAppWebView配置代码 #

InAppWebView(
  initialSettings: InAppWebViewSettings(
    useShouldInterceptRequest: true,
    thirdPartyCookiesEnabled: true,
    iframeAllowFullscreen: false,
    userAgent: userAgent,
    javaScriptCanOpenWindowsAutomatically: false,
    useShouldOverrideUrlLoading: true,
    mediaPlaybackRequiresUserGesture: true,
    allowsPictureInPictureMediaPlayback: false,
    allowsLinkPreview: false,
    allowsBackForwardNavigationGestures: true,
  ),
)

pubspec.yaml相关配置 #

environment:
  sdk: '>=3.1.2 <4.0.0'

dependencies:
  collection: ^1.17.2
  flutter:
    sdk: flutter
  flutter_inappwebview: ^6.0.0
// .. and so on

AndroidManifest.xml配置 #

<manifest xmlns:android="http://schemas.android.com/apk/res/android">
    <uses-permission android:name="android.permission.INTERNET"/>
    <application
        android:label="myapp"
        android:name="${applicationName}"
        android:usesCleartextTraffic="true" 
        android:icon="@mipmap/ic_launcher">
        <activity
            android:name=".MainActivity"
            android:exported="true"
            android:launchMode="singleTop"
            android:theme="@style/LaunchTheme"
            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
            android:hardwareAccelerated="true"
            android:windowSoftInputMode="adjustResize">
            <!-- Specifies an Android theme to apply to this Activity as soon as
                 the Android process has started. This theme is visible to the user
                 while the Flutter UI initializes. After that, this theme continues
                 to determine the Window background behind the Flutter UI. -->
            <meta-data
              android:name="io.flutter.embedding.android.NormalTheme"
              android:resource="@style/NormalTheme"
              />
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
        <!-- Don't delete the meta-data below.
             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
        <meta-data
            android:name="flutterEmbedding"
            android:value="2" />
    </application>
    <!-- Required to query activities that can process text, see:
         https://developer.android.com/training/package-visibility?hl=en and
         https://developer.android.com/reference/android/content/Intent#ACTION_PROCESS_TEXT.

         In particular, this is used by the Flutter engine in io.flutter.plugin.text.ProcessTextPlugin. -->
    <queries>
        <intent>
            <action android:name="android.intent.action.PROCESS_TEXT"/>
            <data android:mimeType="text/plain"/>
        </intent>
    </queries>
</manifest>

android/app/build.gradle配置 #

plugins {
    id "com.android.application"
    id "kotlin-android"
    id "dev.flutter.flutter-gradle-plugin"
}

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
    flutterVersionCode = '1'
}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
    flutterVersionName = '1.0'
}

android {
    namespace "com.example.myapp"
    compileSdk flutter.compileSdkVersion
    ndkVersion flutter.ndkVersion

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = '1.8'
    }

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    defaultConfig {
        applicationId "com.example.myapp"
        minSdkVersion 19
        targetSdkVersion 34
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
        multiDexEnabled true
    }

    buildTypes {
        release {
            signingConfig signingConfigs.debug
        }
    }
}

flutter {
    source '../..'
}

dependencies {}

已尝试的解决方案 #

• 执行flutter clean
• 删除整个/android文件夹后重新执行flutter create
• 通过Android Studio升级助手将Android Gradle Plugin从7.4.2升级到8.2.2，但编译失败已回滚

内容的提问来源于stack exchange，提问作者Donghu Kim