java

package com.example.android.quiz2;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    int horseScore = 0;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void checkResults(View view) {
        horseScore = 0;

        // Q1, answer: a stallion, a gelding
        CheckBox stallion = (CheckBox) findViewById(R.id.stallion);
        boolean stallionChecked = stallion.isChecked();
        CheckBox gelding = (CheckBox) findViewById(R.id.gelding);
        boolean geldingChecked = gelding.isChecked();

        if (stallionChecked && geldingChecked) {
            horseScore = horseScore + 1;
        }

        // Q2, answer: chestnut
        RadioButton chestnut = findViewById(R.id.chestnut);
        boolean hasChestnut = chestnut.isChecked();
        if (hasChestnut) {
            horseScore = horseScore + 1;
        }

        // Q3, answer: walk
        RadioButton walk = findViewById(R.id.walk);
        boolean hasWalk = walk.isChecked();
        if (hasWalk) {
            horseScore = horseScore + 1;
        }
        // Q4, answer: arabian
        EditText arabian = findViewById(R.id.arabian);
        String checkArabian = arabian.getText().toString();
        if (checkArabian.equals("arabian")) {
            horseScore = horseScore + 1;
        }

        if (horseScore == 0) {
            Toast.makeText(this, "You get: " + horseScore + " point out of 4.", Toast.LENGTH_SHORT).show();
            return;
        } else if (horseScore == 1) {
            Toast.makeText(this, "You get: " + horseScore + " points out of 4.", Toast.LENGTH_SHORT).show();
        } else if (horseScore == 2) {
            Toast.makeText(this, "You get: " + horseScore + " points out of 4.", Toast.LENGTH_SHORT).show();
        } else if (horseScore == 3) {
            Toast.makeText(this, "You get: " + horseScore + " points out of 4.", Toast.LENGTH_SHORT).show();
        } else if (horseScore == 4) {
            Toast.makeText(this, "You get: " + horseScore + " points out of 4.", Toast.LENGTH_SHORT).show();
        }
    }
}