生成签名APK遇重复条目错误，请求技术排查解决

Hey, I’ve dealt with this exact duplicate entry issue multiple times, so let’s break down the most reliable fixes to get you past this:

• Track down duplicate dependencies first
  Run this command in your project root to generate a full dependency tree—it’ll show you exactly which libraries are pulling in duplicate copies of the support design library:

  # For macOS/Linux
  ./gradlew app:dependencies
  
  # For Windows
  gradlew.bat app:dependencies
  

  Look for entries of com.android.support:design that come from more than one source (e.g., your direct dependency plus a third-party library). Once you spot the duplicate, exclude the extra one from the third-party dependency like this:

  implementation('com.example.third-party:library:1.2.3') {
      exclude group: 'com.android.support', module: 'design'
  }
  

• Unify all support library versions
  Mismatched versions of Android Support libraries (like appcompat-v7, design, recyclerview-v7) are a super common cause of this error. Make sure every support library in your dependencies block uses the exact same version number.
  To make this easier, define a version variable in your root build.gradle:

  ext {
      supportLibVersion = '28.0.0' // Use the latest stable version you need
  }
  

  Then reference it in your app module’s build.gradle:

  implementation "com.android.support:appcompat-v7:$supportLibVersion"
  implementation "com.android.support:design:$supportLibVersion"
  implementation "com.android.support:recyclerview-v7:$supportLibVersion"
  

• Clean up caches and rebuild
  Gradle caches can sometimes hold onto old, conflicting files. Try these steps:

  1. Go to Build > Clean Project in Android Studio
  2. Then run Build > Rebuild Project
  3. If that doesn’t work, manually delete the .gradle folder (in your project root and app module) and the build folders, then re-sync your Gradle project.

• Check for AndroidX/Support Library conflicts
  If you’ve started migrating to AndroidX, you can’t mix old Support Libraries with AndroidX dependencies. Check your gradle.properties file:

  android.useAndroidX=true
  android.enableJetifier=true
  

  If these lines are present, replace all old Support Library dependencies with their AndroidX equivalents (e.g., use com.google.android.material:material:1.5.0 instead of com.android.support:design). If you haven’t migrated, make sure none of your dependencies are pulling in AndroidX libraries.

If none of these fixes work, share your full build.gradle code (especially the dependencies section) and I can help you pinpoint the exact conflict.

内容的提问来源于stack exchange，提问作者Shubham Sejpal