Android Studio 3.1.1更新后第三方库导入编辑器无法识别求助

Hey there, let's tackle this frustrating editor issue you're facing! Even though your APK builds and runs perfectly, those red marks on third-party imports are definitely a nuisance. Here are some tried-and-tested fixes to get your editor back on track:

1. Force Refresh Gradle Dependencies #

Sometimes cached dependency data can throw the editor off. Try these steps:

• Click the Sync Project with Gradle Files button (the elephant icon) in the top-right corner of Android Studio.
• If that doesn't work, run this command in your project's root directory (use gradlew instead of ./gradlew on Windows):

  ./gradlew clean build --refresh-dependencies
  

  This forces Gradle to re-download all dependencies from scratch, bypassing any stale cache.

2. Verify Your Gradle Configuration #

Double-check these key files to ensure no typos or mismatches:

• In your module-level build.gradle (usually app/build.gradle), confirm your third-party library dependencies are correctly added (no spelling errors, valid version numbers).
• In your root-level build.gradle, make sure the Android Gradle plugin version matches your Android Studio version. For AS 3.1.1, it should be:

  classpath 'com.android.tools.build:gradle:3.1.1'
  

  Your Gradle version 4.4 is compatible with this plugin version, so that part checks out—but confirming the plugin version is correctly written is crucial.

3. Re-Import the Project #

Corrupted IDE configuration files can cause recognition issues. Here's how to reset them:

• Close Android Studio completely.
• Delete the .idea folder and all *.iml files from your project root.
• Re-open Android Studio and select Import Project to load your project again. This lets the IDE regenerate fresh configuration files.

4. Confirm SDK Components Are Installed #

Even if you set the SDK versions in your build files, make sure the corresponding components are actually installed:

• Go to File > Project Structure > SDK Location to confirm your SDK path is correct.
• Open the SDK Manager and check that:
  • Android 8.1 (API 27) SDK is installed
  • Build Tools 27.0.3 is installed
  • Android Support Repository (version 27.1.1) is installed

5. Reset the Android Support Plugin #

Occasionally, the Android Support plugin can glitch out. Try resetting it:

• Go to File > Settings > Plugins (or Android Studio > Preferences > Plugins on macOS).
• Find the Android Support plugin, disable it, then restart Android Studio.
• Re-enable the plugin and restart Android Studio once more.

If none of these fixes work, you might want to check if the third-party library itself has compatibility issues with your SDK versions (minSdk 16, targetSdk 27). Alternatively, consider updating Android Studio to a more recent stable version (though 3.1.1 is older, newer versions have better dependency handling).

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