Android Studio 3.1RC构建Gradle耗时过长且报Java IO异常求助

Hey there, let's work through your Gradle build headaches—slow performance plus Java IO errors are super frustrating, especially with your setup (Ubuntu 18.04, Android Studio 3.1RC, Gradle 3.3, Android plugin 2.2.3). Here are practical, step-by-step fixes to try:

1. Resolve Java IO Exceptions First #

Most IO errors on Ubuntu stem from permission issues or corrupted cache files:

• Fix directory permissions: Run these terminal commands to ensure your user owns Gradle and Android cache directories (a common source of IO blocks):

  sudo chown -R $USER:$USER ~/.gradle
  sudo chown -R $USER:$USER ~/.android
  

• Delete corrupted cache: Manually clear the Gradle cache to eliminate damaged files that trigger IO errors:

  rm -rf ~/.gradle/caches
  

2. Speed Up Gradle Builds #

These tweaks will cut down your build time significantly:

• Enable Gradle Daemon: Add this line to ~/.gradle/gradle.properties to keep the Gradle process running in the background, avoiding repeated startup overhead:

  org.gradle.daemon=true
  

• Allow Parallel Builds: For multi-module projects, enable parallel execution by adding:

  org.gradle.parallel=true
  

• Reduce Unnecessary Tasks: Temporarily disable lint checks if you don't need them right now (add this to your app module's build.gradle):

  lintOptions {
      checkReleaseBuilds false
      abortOnError false
  }
  

• Align Plugin & Gradle Versions: Your Android plugin 2.2.3 is slightly mismatched with Gradle 3.3 (Gradle 3.3 typically pairs with plugin 2.3.x). Try updating the plugin to 2.3.3 in your project-level build.gradle to improve compatibility:

  dependencies {
      classpath 'com.android.tools.build:gradle:2.3.3'
  }
  

3. Adjust Android Studio Memory Allocation #

Insufficient heap space can cause both slow builds and IO errors. Increase the Java heap size:

1. Open Android Studio and go to Help > Edit Custom VM Options
2. Modify the -Xmx line to allocate more memory (e.g., for 8GB+ RAM, use):

   -Xmx4096m
   

3. Restart Android Studio for changes to take effect.

4. Clean & Rebuild #

Sometimes a simple clean fixes lingering issues:

• Go to Build > Clean Project in Android Studio
• After cleaning, run Build > Rebuild Project to start fresh.

If you still run into issues, check the Build Output tab in Android Studio for the exact IO error message (e.g., which file/directory is causing the problem)—that will help narrow down the root cause even further.

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