task not found in root project gradle android studio

We must be able to create a runnable binary distribution that doesn’t use the so called “fat jar” approach.We must be able to run our application with Gradle.

Our Gradle build has also two other requirements: This module has two dependencies: it needs the core module and uses Log4j 1.2.17 as a logging library. The app module contains the HelloWorld class that starts our application, gets a message from a MessageService object, and writes the received message to a log file.This module has only one dependency: it has one unit test that uses Junit 4.11. In our case, it contains only one class: the MessageService class returns the string 'Hello World!'. The core module contains the common components that are used by the other modules of our application.

Getting Started With Gradle: Dependency Management describes how you can manage the dependencies of your Gradle project.

Getting Started With Gradle: Our First Java Project describes how you can create a Java project by using Gradle and package your application to an executable jar file.

Getting Started With Gradle: Introduction helps you to install Gradle, describes the basic concepts of a Gradle build, and describes how you can add functionality to your build by using Gradle plugins.

If you are not familiar with Gradle, you should read the following blog posts before you continue reading this blog post:

Task not found in root project gradle android studio