gradle execute task after build - gradle

Question

I am building my project with gradle, with the following build.gradle file:
project('a'){
apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'application'
buildDir = 'build'
[compileJava, compileTestJava]*.options*.encoding = 'UTF-8'
repositories {
mavenCentral()
}
dependencies {
compile 'org.slf4j:slf4j-api:1.7.7'
}
}
When I input the gradle build command, I want gradle to execute a task after the build.
I found a mustRunAfter on the Internet, and I have tried a variety of ways but failed.
Please tell me if you know how.

Answer 1

What you need is finalizedBy, see the following script:
apply plugin: 'java'
task finalize {
doLast {
println('finally!')
}
}
build.finalizedBy(finalize)
Here are the docs.

Answer 2

Nowadays you can use a BuildListener, it just works. Below is an example written in kotlin DSL
build.gradle.kts
plugins {
id("com.android.application")
id("kotlin-android")
id("kotlin-kapt")
}
android {
//[..]
project.gradle.addBuildListener(object : BuildListener {
override fun buildStarted(gradle: Gradle) {}
override fun settingsEvaluated(settings: Settings) {}
override fun projectsLoaded(gradle: Gradle) {}
override fun projectsEvaluated(gradle: Gradle) {}
override fun buildFinished(result: BuildResult) {
// add what you need to do here
println("finally!")
}
})
}
dependencies {
//[...]
}