printing executed time of a task

snippet_in_app.gradle

// (1) put this snippet to the tail of app.gradle
// (2) ./gradlew assembleDebug

public class BuildTimeListener implements TaskExecutionListener, BuildListener {
    private org.gradle.internal.time.Clock clock
    private times = []

    @Override
    void beforeExecute(Task task) {
        clock = new org.gradle.internal.time.Clock()
    }

    @Override
    void afterExecute(Task task, TaskState taskState) {
        def ms = clock.getElapsedMillis()
        times.add([ms, task.path])

        //task.project.logger.warn "${task.path} spend ${ms}ms"
    }

    @Override
    void buildFinished(BuildResult result) {
        println "Task spend time:"
        for (time in times) {
            if (time[0] >= 50) {
                printf "%7sms  %s\n", time
            }
        }
    }
    @Override
    void buildStarted(Gradle gradle) {}
    @Override
    void projectsEvaluated(Gradle gradle) {}
    @Override
    void projectsLoaded(Gradle gradle) {}
    @Override
    void settingsEvaluated(Settings settings) {}
}

project.gradle.addListener(new BuildTimeListener())