A friend has passed me a project for class, and once I have imported the project and the ACM library, I am ready to execute it, but I get the following error:
And I do not know what is due.
The problem is that the project you want to open is an Android project and you must specify the Android SDK.
If you are using Intelli Idea, go to Project Structure
and define it:
Review this < strong> answer (english).
Here you have the requirements to develop Android with Intellij Idea.