Flutter项目Release构建失败：cached_video_player资源验证错误

问题描述 #

Flutter项目集成了cached_video_player和appinio_video_player插件，Debug模式构建正常，但Release模式下执行:cached_video_player:verifyReleaseResources任务失败，错误信息如下：

执行com.android.build.gradle.tasks.VerifyLibraryResourcesTask$Action时出错
Android资源链接失败
ERROR:C:\Users\HP.gradle\caches\transforms-3\87f0e673dc4ee6b514e9d5964fa729a9\transformed\core-1.7.0\res\values\values.xml:105:5-114:25: AAPT: error: resource android:attr/lStar not found.

原项目build.gradle内容：

buildscript {
    repositories {
        google()
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:4.1.3'
        classpath 'com.google.gms:google-services:4.3.15'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.9.23"
    }
}

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'com.google.gms.google-services'
apply plugin: 'com.google.firebase.crashlytics'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"

android {
    compileSdkVersion 34
    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.project"
        minSdkVersion 28
        targetSdkVersion flutter.targetSdkVersion
        flutterVersionCode.toInteger()
        versionName "7.1"
        multiDexEnabled true
    }
    buildTypes {
        release {
            signingConfig signingConfigs.release
            minifyEnabled true 
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

flutter {
    source '../..'
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'androidx.multidex:multidex:2.0.1'
    implementation platform('com.google.firebase:firebase-bom:31.2.3')
    implementation 'com.google.firebase:firebase-analytics-ktx'
    implementation 'com.google.firebase:firebase-auth-ktx'
    implementation 'com.google.android.gms:play-services-auth:19.2.0'
    implementation 'com.android.support:support-v4:28.0.0'
    testImplementation 'junit:junit:4.13.2'
    implementation("com.google.firebase:firebase-perf-ktx")
    implementation("com.google.firebase:firebase-crashlytics-ktx")
    implementation("com.google.firebase:firebase-analytics-ktx")
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
    
}

解决方案 #

错误根源是AndroidX与旧Support库冲突、Gradle插件版本不兼容compileSdk 34，以及依赖库版本不一致，按以下步骤修复：

1. 替换旧Support库为AndroidX库 #

删除依赖中的com.android.support:support-v4:28.0.0，替换为AndroidX的Core库：

implementation 'androidx.core:core:1.10.1'

2. 升级Android Gradle插件版本 #

当前4.1.3版本无法适配compileSdk 34，升级到稳定兼容版本：
修改buildscript中的classpath：

classpath 'com.android.tools.build:gradle:7.4.2'

同时更新项目根目录下gradle/wrapper/gradle-wrapper.properties的distributionUrl：

distributionUrl=https\://services.gradle.org/distributions/gradle-7.4.2-all.zip

3. 强制统一AndroidX Core库版本 #

在android块中添加配置，避免依赖冲突：

android {
    // ... 原有配置
    configurations.all {
        resolutionStrategy {
            force 'androidx.core:core:1.10.1'
        }
    }
}

4. 清理缓存并重新构建 #

执行命令清理缓存后重新构建：

flutter clean
# Windows用户手动删除C:\Users\HP\.gradle\caches目录
flutter build apk --release

修改后的build.gradle示例 #

buildscript {
    repositories {
        google()
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:7.4.2'
        classpath 'com.google.gms:google-services:4.3.15'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.9.23"
    }
}

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'com.google.gms.google-services'
apply plugin: 'com.google.firebase.crashlytics'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"

android {
    compileSdkVersion 34
    ndkVersion flutter.ndkVersion
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
    kotlinOptions {
        jvmTarget = '1.8'
    }

    configurations.all {
        resolutionStrategy {
            force 'androidx.core:core:1.10.1'
        }
    }

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

    defaultConfig {
        applicationId "com.example.project"
        minSdkVersion 28
        targetSdkVersion flutter.targetSdkVersion
        flutterVersionCode.toInteger()
        versionName "7.1"
        multiDexEnabled true
    }
    buildTypes {
        release {
            signingConfig signingConfigs.release
            minifyEnabled true 
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

flutter {
    source '../..'
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'androidx.multidex:multidex:2.0.1'
    implementation platform('com.google.firebase:firebase-bom:31.2.3')
    implementation 'com.google.firebase:firebase-analytics-ktx'
    implementation 'com.google.firebase:firebase-auth-ktx'
    implementation 'com.google.android.gms:play-services-auth:19.2.0'
    implementation 'androidx.core:core:1.10.1'
    testImplementation 'junit:junit:4.13.2'
    implementation("com.google.firebase:firebase-perf-ktx")
    implementation("com.google.firebase:firebase-crashlytics-ktx")
    implementation("com.google.firebase:firebase-analytics-ktx")
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
    
}

内容的提问来源于stack exchange，提问作者Yamini Chaudhary