升级Android Studio 3.1与Gradle 4.4后无法解析Glide库问题

Yep, this is a super common problem that tons of developers hit when making that upgrade jump. Let’s walk through the most reliable fixes that get Glide working again for most folks:

1. Double-Check Your Glide Dependency Declaration #

First off, make sure you’re using the correct dependency syntax for Gradle 4.4 (which uses implementation instead of the old compile keyword). For Glide 4.x (the stable version around Android Studio 3.1’s release), your app-level build.gradle should have:

implementation 'com.github.bumptech.glide:glide:4.7.1'
annotationProcessor 'com.github.bumptech.glide:compiler:4.7.1'

If you’re using an older Glide version, consider upgrading to 4.7.1 or a compatible stable release—older versions might have compatibility quirks with the new Gradle/AS setup.

2. Clean Up Your Repository Configuration #

Your current allprojects repo setup has some redundancy. The google() repository already includes the https://maven.google.com/ repo, so you can remove that duplicate entry. Also, ensure your repo order makes sense (though order rarely breaks things, it can help with resolution speed):

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

Glide is hosted on both Maven Central and JCenter, so keeping these two ensures the build tool can pull the library without issues.

3. Wipe Cache & Rebuild #

More often than not, cached old Gradle data is the culprit. Here’s how to fix that:

• Go to File > Invalidate Caches / Restart and select "Invalidate and Restart" to clear out all cached build data.
• Once Android Studio restarts, run Build > Clean Project followed by Build > Rebuild Project.

4. Check Proxy Settings (If Applicable) #

If you’re behind a corporate proxy or using a VPN, make sure Gradle is configured to use the correct proxy settings. Misconfigured proxies can block access to Maven repositories, leading to unresolved dependencies. You can check/set proxy settings in the gradle.properties file in your project root.

A lot of developers report that combining steps 1-3 resolves the issue immediately—start there before diving into more complex fixes like proxy troubleshooting.

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