Android Studio3.0.1+Kotlin1.2.10配置Gradle时POM解析失败求助

Hey there, let's work through this frustrating Gradle configuration issue you're hitting. The "Already seen doctype" error when resolving the com.android.tools.build:gradle:3.0.1 POM usually points to corrupted cached files or incomplete downloads. Here are step-by-step fixes to get your project running again:

1. Clear Gradle Cache & Invalidate Studio Caches #

Corrupted cache files are the most common culprit here. Let's wipe them out:

• Delete Gradle's local cache:
  • On Windows: Go to C:\Users\<YourUsername>\.gradle\caches and delete all contents in this folder (or just the modules-2 subfolder, which stores dependency POMs and jars).
  • On Mac/Linux: Open Terminal and run rm -rf ~/.gradle/caches/modules-2
• Invalidate Android Studio caches:
  Go to File > Invalidate Caches / Restart, then select Invalidate and Restart. This forces Studio to rebuild its local indexes and re-download dependencies.

2. Verify Repository Configuration #

Make sure your project's root build.gradle has the correct repositories listed (and in the right order):
Open the root build.gradle file and check that the buildscript block includes google() and jcenter():

buildscript {
    ext.kotlin_version = '1.2.10-release-Studio3.0-1'
    repositories {
        google() // Prioritize Google's repository first
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

If you're having trouble accessing Google's repository due to network restrictions, you can replace it with a reliable domestic Maven mirror – just ensure the mirror hosts the required Android Gradle plugin artifacts.

3. Re-download Gradle Distribution #

Sometimes the Gradle wrapper files get corrupted. Let's refresh them:

• Open gradle/wrapper/gradle-wrapper.properties and confirm the distributionUrl is set to:

  distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip
  

• Delete the Gradle wrapper cache folder:
  • Windows: C:\Users\<YourUsername>\.gradle\wrapper\dists\gradle-4.1-all
  • Mac/Linux: rm -rf ~/.gradle/wrapper/dists/gradle-4.1-all
• Sync your project again (click the "Sync Project with Gradle Files" button in Studio) – this will trigger a fresh download of the Gradle 4.1 distribution.

4. Manually Replace the Corrupted POM File #

If none of the above works, you can manually fix the corrupted POM:

1. Navigate to the cache directory for the Gradle plugin:
   • ~/.gradle/caches/modules-2/files-2.1/com.android.tools.build/gradle/3.0.1/ (the subfolder name will be a hash)
2. Delete the existing gradle-3.0.1.pom file in that folder.
3. Get a clean copy of the POM file from a trusted Maven repository and place it in the same folder.
4. Sync your project once more.

These steps should resolve the POM parsing error and get your Kotlin-based Android app building again!

内容的提问来源于stack exchange，提问作者pouria barani