如何在Android Studio中显示扫描仪功能？

Question

我目前正在为自己玩的游戏开发一个小型应用程序，并且目前已经为该应用程序编写了代码，但是我不知道如何让扫描仪从仿真器获得输入。我将如何解决这个问题？

import java.util.Scanner;
public class MarrowGnawerCombo {
    public static void main(String[] args) {

        //take user input for number of times combo will be activated
        Scanner Input = new Scanner(System.in);
        System.out.println("Enter how many times you wish to tap Marrow-Gnawer:");
        int NumOfTaps = Input.nextInt();

        //take user input for number of how many rats you start with
        System.out.println("Enter how many rat cards you currently control:");
        double NumOfRats = Input.nextDouble();

        Input.close();

        //math for combo
        for (int i = 0; i < NumOfTaps; i++) {
            NumOfRats = NumOfRats--;
            NumOfRats = NumOfRats * 2;
        }

        //print out results
        System.out.println("After tapping Marrow-Gnawer " + NumOfTaps + " times, you will create " + NumOfRats + " 1/1 rat tokens.");
    }

}

这里是所有人都需要的代码。