Failed to recompile Android plugin in gradle

[MilkyW]

command: unity-android-notifications-master\PluginSrc>gradle exportJar

result:

Configure project :app Configuration 'compile' in project ':app' is deprecated. Use 'implementation' in stead. Configuration 'androidTestCompile' in project ':app' is deprecated. Use 'android TestImplementation' instead. Configuration 'testCompile' in project ':app' is deprecated. Use 'testImplementa tion' instead.

FAILURE: Build failed with an exception.

• What went wrong: A problem occurred configuring project ':app'.

  SDK location not found. Define location with sdk.dir in the local.properties f ile or with an ANDROID_HOME environment variable.

• Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

• Get more help at https://help.gradle.org

BUILD FAILED in 2s

[MilkyW]

add ANDROID_HOME environment variable