Using Android Facades?

Question

Java

Good afternoon, I did not find the right answer on the Internet.
How to create a facade in android.
Class example

public class Input
{
    public String test() {
        return "sdas";
    }
}

public class Input2
{
    public String test2() {
        return "sdas1";
    }
}

How to create the right facade for them.