安装rn-fetch-blob后React Native 0.62.2安卓构建失败求助

Hey there, let's work through this build failure together. The "无法删除目录" (failed to delete directory) error in the :app:processDebugResources task usually ties to cached build files, process locks, or compatibility mismatches between rn-fetch-blob, your Gradle version, and JDK setup. Here are the steps to resolve it:

Step 1: Clean Up Build Caches and Dependencies #

First, let's wipe out any corrupted cached files and reinstall dependencies:

• Stop all running processes related to your project: close the Android emulator, shut down the Metro bundler, and end any Java/Gradle processes in your task manager.
• Run these commands in your project root:

  # Navigate to Android directory
  cd android
  # Clean Gradle build files
  ./gradlew clean
  # Go back to root
  cd ..
  # Remove node modules and lock file
  rm -rf node_modules
  rm package-lock.json
  # Reinstall dependencies
  npm install
  

  For Windows users, use these commands instead:

  cd android
  gradlew clean
  cd ..
  rmdir /s /q node_modules
  del package-lock.json
  npm install
  

Step 2: Verify rn-fetch-blob Version Compatibility #

React Native 0.62.2 is an older version, so not all rn-fetch-blob releases will work smoothly with it. Try downgrading to a version known to be compatible, like v0.12.0:

• Update your package.json to set "rn-fetch-blob": "^0.12.0"
• Run npm install again, then retry react-native run-android

Step 3: Release Locked Directories #

The "无法删除目录" error often happens because a system process is holding onto files in your Android build folder. To fix this:

• Windows: Open Task Manager, go to the "Details" tab, look for any java.exe or gradlew.exe processes related to your project, and end them.
• Mac/Linux: Use the lsof command to find the process locking the directory (replace <path-to-build-dir> with your actual android/app/build path):

  lsof | grep <path-to-build-dir>
  

  Then kill the process using its PID:

  kill -9 <PID>
  

Step 4: Adjust JDK and Gradle Setup #

React Native 0.62.x officially recommends JDK 8 or 11, and JDK 13 might have compatibility issues with Gradle 6.3. Try switching to JDK 11:

• Install JDK 11 and update your system's JAVA_HOME environment variable to point to the JDK 11 installation.
• Double-check that your android/gradle/wrapper/gradle-wrapper.properties file has distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-all.zip to match your local Gradle version.

Step 5: Verify rn-fetch-blob Linking #

While React Native 0.60+ uses auto-linking, sometimes manual linking can resolve hidden issues. Run this command to ensure rn-fetch-blob is properly linked:

react-native link rn-fetch-blob

Then run ./gradlew clean again before rebuilding.

If none of these steps work, try creating a fresh React Native 0.62.2 project, install rn-fetch-blob, and test the build. This will help you rule out any custom configuration issues in your original project.

内容的提问来源于stack exchange，提问作者Efosa