将Unity项目集成到Flutter的Android Studio项目时遇重复类问题求助

我正在将Unity项目集成到基于Flutter的Android Studio项目中，遇到了如下重复类冲突问题：

Duplicate class androidx.viewpager.widget.ViewPager$3 found in modules jetified-support-core-ui-25.1.0-runtime (:support-core-ui-25.1.0:) and viewpager-1.0.0-runtime (androidx.viewpager:viewpager:1.0.0)

Duplicate class androidx.viewpager.widget.ViewPager$4 found in modules jetified-support-core-ui-25.1.0-runtime (:support-core-ui-25.1.0:) and viewpager-1.0.0-runtime (androidx.viewpager:viewpager:1.0.0)
Duplicate class androidx.viewpager.widget.ViewPager$DecorView found in modules jetified-support-core-ui-25.1.0-runtime (:support-core-ui-25.1.0:) and viewpager-1.0.0-runtime (androidx.viewpager:viewpager:1.0.0)
Duplicate class androidx.viewpager.widget.ViewPager$ItemInfo found in modules jetified-support-core-ui-25.1.0-runtime (:support-core-ui-25.1.0:) and viewpager-1.0.0-runtime (androidx.viewpager:viewpager:1.0.0)
Duplicate class androidx.viewpager.widget.ViewPager$LayoutParams found in modules jetified-support-core-ui-25.1.0-runtime (:support-core-ui-25.1.0:) and viewpager-1.0.0-runtime (androidx.viewpager:viewpager:1.0.0)
Duplicate class androidx.viewpager.widget.ViewPager$MyAccessibilityDelegate found in modules jetified-support-core-ui-25.1.0-runtime (:support-core-ui-25.1.0:) and viewpager-1.0.0-runtime (androidx.viewpager:viewpager:1.0.0)
Duplicate class androidx.viewpager.widget.ViewPager$OnAdapterChangeListener found in modules jetified-support-core-ui-25.1.0-runtime (:support-core-ui-25.1.0:) and viewpager-1.0.0-runtime (androidx.viewpager:viewpager:1.0.0)
Duplicate class androidx.viewpager.widget.ViewPager$OnPageChangeListener found in modules jetified-support-core-ui-25.1.0-runtime (:support-core-ui-25.1.0:) and viewpager-1.0.0-runtime (androidx.viewpager:viewpager:1.0.0)
Duplicate class androidx.viewpager.widget.ViewPager$PageTransformer found in modules jetified-support-core-ui-25.1.0-runtime (:support-core-ui-25.1.0:) and viewpager-1.0.0-runtime (androidx.viewpager:viewpager:1.0.0)
Duplicate class androidx.viewpager.widget.ViewPager$PagerObserver found in modules jetified-support-core-ui-25.1.0-runtime (:support-core-ui-25.1.0:) and viewpager-1.0.0-runtime (androidx.viewpager:viewpager:1.0.0)
Duplicate class androidx.viewpager.widget.ViewPager$SavedState found in modules jetified-support-core-ui-25.1.0-runtime (:support-core-ui-25.1.0:) and viewpager-1.0.0-runtime (androidx.viewpager:viewpager:1.0.0)
Duplicate class androidx.viewpager.widget.ViewPager$SavedState$1 found in modules jetified-support-core-ui-25.1.0-runtime (:support-core-ui-25.1.0:) and viewpager-1.0.0-runtime (androidx.viewpager:viewpager:1.0.0)
Duplicate class androidx.viewpager.widget.ViewPager$SimpleOnPageChangeListener found in modules jetified-support-core-ui-25.1.0-runtime (:support-core-ui-25.1.0:) and viewpager-1.0.0-runtime (androidx.viewpager:viewpager:1.0.0)
Duplicate class androidx.viewpager.widget.ViewPager$ViewPositionComparator found in modules jetified-support-core-ui-25.1.0-runtime (:support-core-ui-25.1.0:) and viewpager-1.0.0-runtime (androidx.viewpager:viewpager:1.0.0)

解决方案 #

这个冲突是因为Unity导出的Android模块包含旧版support-core-ui库，而Flutter项目依赖了AndroidX规范的viewpager库，两者的ViewPager相关类重复导致的。可以通过以下方法解决：

1. 排除Unity模块中的冲突依赖 #

在Flutter项目的android/build.gradle文件中，找到Unity模块的依赖配置，排除其中的support-core-ui库：

dependencies {
    // 其他依赖声明...
    implementation project(':unityLibrary') {
        exclude group: 'com.android.support', module: 'support-core-ui'
    }
}

2. 强制统一依赖版本（可选） #

如果排除依赖后仍有问题，可以在android/build.gradle的allprojects块中添加强制规则，确保所有模块使用同一版本的AndroidX ViewPager：

allprojects {
    repositories {
        // 仓库配置...
    }
    configurations.all {
        resolutionStrategy {
            force 'androidx.viewpager:viewpager:1.0.0'
        }
    }
}

3. 配置Unity使用AndroidX #

打开Unity编辑器，进入Edit > Project Settings > Player，在Android > Publishing Settings中勾选Use AndroidX选项，重新导出Unity项目后再集成到Flutter中。

4. 清理重建项目 #

完成以上设置后，执行以下命令清理缓存并重建项目：

./gradlew clean
./gradlew assembleDebug

内容的提问来源于stack exchange，提问作者Allan Macatingrao