FAQ

When using Booster, you may encounter some issues. Below are some common problems and their solutions.

NoSuchMethodError: kotlin.io.ByteStreamKt.readBytes(Ljava/io/InputStream;)[B

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Upgrade the Kotlin version to 1.3.10 or higher

classpath 'org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.10'

NoSuchFieldError: JAVA_LETTER_OR_DIGIT

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The Guava version required by Android Gradle Plugin is lower than 26.0, while other libraries depend on Guava version 26.0 or higher

CharMatcher.JAVA_LETTER_OR_DIGIT was removed in Guava version 26.0

• Upgrade the Android Gradle Plugin version

  classpath 'com.android.tools.build:gradle:3.3.0'
  

IllegalAccessError: tried to access method com.google.common.io.Files.fileTreeTraverser()

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The Guava version required by Android Gradle Plugin is lower than 25.0

com.google.common.io.Files.fileTreeTraverser() was removed in Guava version 25.0

Check whether the Guava version referenced in your project is correct, and ensure that the build script depends on the JRE version of Guava

NoSuchFieldError: ASCII

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• Upgrade the Android Gradle Plugin version

  classpath 'com.android.tools.build:gradle:3.4.2'
  

• Upgrade the Gradle Wrapper version

  distributionUrl=https\://services.gradle.org/distributions/gradle-5.1.1-all.zip
  

• Upgrade the Kotlin version to 1.3.10 or higher

  classpath 'org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.10'
  

How to Check the Referenced Guava Version

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Run the buildEnv task to view the dependencies of the project's build script:

$ ./gradlew buildEnv

Remove the Guava Version Dependency from Booster

If all the above methods do not work and you do not want to upgrade the Android Gradle Plugin version, consider excluding Guava from Booster's dependencies:

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classpath("com.didiglobal.booster:booster-gradle-plugin:${booster_version}") {
    exclude group: 'com.google.guava'
}