android studio user guide
https://developer.android.com/studio/releases/gradle-plugin.html#revisions
对应关系：Plugin vesion指的是在AS中作为plugin的version， Gradle Version 指的是其本身的version , distributionUrl 填入其本身的version
When you update Android Studio, you may receive a prompt to also update Gradle to the latest available version. You can choose to accept the update or manually specify a version based on your project's build requirements.
The following table lists which version of Gradle is required for each version of the Android plugin for Gradle. For the best performance, you should use the latest possible version of both Gradle and the Android plugin.
Plugin versionRequired Gradle version1.0.0 - 1.1.32.2.1 - 2.31.2.0 - 1.3.12.2.1 - 2.91.5.02.2.1 - 2.132.0.0 - 2.1.22.10 - 2.132.1.3 - 2.2.32.14.1+2.3.0+3.3+You can specify the Gradle version in either the File > Project Structure > Project menu in Android Studio, or by editing the Gradle distribution reference in thegradle/wrapper/gradle-wrapper.properties file. The following example sets the Gradle version to 3.3 in thegradle-wrapper.properties file.
... distributionUrl = https\://services.gradle.org/distributions/gradle-3.3-all.zip ... 