안드로이드 앱: 국기 맞추기 퀴즈 앱 만들기 소스코드

https://play.google.com/store/apps/details?id=com.jw.quizshow 

세계 국기&수도 맞추기 퀴즈 앱 - Google Play 앱

 

안드로이드 앱: 국기 맞추기 퀴즈 앱 만들기 소스코드 

 

XML

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <ImageView
        android:id="@+id/iv_flag"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_above="@+id/b_answer1"
        android:layout_alignParentTop="true"
        android:scaleType="centerInside"
        android:layout_centerHorizontal="true"

        />

    <Button
        android:id="@+id/b_answer1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_above="@+id/b_answer2"
        android:layout_centerHorizontal="true"
        android:text=""/>

    <Button
        android:id="@+id/b_answer2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_above="@+id/b_answer3"
        android:text=""/>
    <Button
        android:id="@+id/b_answer3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_above="@+id/b_answer4"
        android:layout_centerHorizontal="true"
        android:text="" />

    <Button
        android:id="@+id/b_answer4"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:text=""/>

</RelativeLayout>

 

Java Code - CountryItem

package com.jwlee.flagquiz;

public class CountryItem {

    String name;
    int image;

    public CountryItem(String name, int image){
        this.name = name;
        this.image = image;

    }

    public String getName() {
        return name;
    }

    public int getImage() {
        return image;
    }
}

 

Java Code - Database 

package com.jwlee.flagquiz;

public class Database {

    Integer[] flags = {
            R.drawable.china,
            R.drawable.uk,
            R.drawable.korea,
            R.drawable.usa

    };

    String[] answers = {
            "china",
            "uk",
            "korea",
            "usa"

    };
}

https://play.google.com/store/apps/details?id=com.jw.quizshow 

세계 국기&수도 맞추기 퀴즈 앱 - Google Play 앱

 

Java Code - MainActivity

package com.jwlee.flagquiz;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Random;

public class MainActivity extends AppCompatActivity {

    Button b_answer1, b_answer2, b_answer3, b_answer4;
    ImageView iv_flag;
    List<CountryItem> list;
    Random r;
    int turn = 1;

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

        r = new Random();

        iv_flag = findViewById(R.id.iv_flag);

        b_answer1 = findViewById(R.id.b_answer1);
        b_answer2 = findViewById(R.id.b_answer2);
        b_answer3 = findViewById(R.id.b_answer3);
        b_answer4 = findViewById(R.id.b_answer4);

        list = new ArrayList<>();


        // 국기와 국명 넣기
        for (int i = 0; i < new Database().answers.length; i++) {
            list.add(new CountryItem(new Database().answers[i], new Database().flags[i]));
        }

        //랜덤
        Collections.shuffle(list);

        newQuestion(turn);

        b_answer1.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // 정답 체크
                if (b_answer1.getText().toString().equalsIgnoreCase(list.get(turn - 1).getName())) {
                    Toast.makeText(MainActivity.this, "Correct!", Toast.LENGTH_SHORT).show();

                    //마지막 문제 체크
                    if (turn < list.size()) {
                        turn++;
                        newQuestion(turn);

                    } else {
                        Toast.makeText(MainActivity.this, "You finished the game!", Toast.LENGTH_SHORT).show();
                        finish();
                    }

                } else {

                    Toast.makeText(MainActivity.this, "Wrong!", Toast.LENGTH_SHORT).show();
                    //마지막 문제 체크
                    if (turn < list.size()) {
                        turn++;
                        newQuestion(turn);

                    } else {
                        Toast.makeText(MainActivity.this, "You lost the game!", Toast.LENGTH_SHORT).show();
                        finish();
                    }

                }

            }
        });

        b_answer2.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // 정답 체크
                if (b_answer2.getText().toString().equalsIgnoreCase(list.get(turn - 1).getName())) {
                    Toast.makeText(MainActivity.this, "Correct!", Toast.LENGTH_SHORT).show();

                    //마지막 문제 체크
                    if (turn < list.size()) {
                        turn++;
                        newQuestion(turn);

                    } else {
                        Toast.makeText(MainActivity.this, "You finished the game!", Toast.LENGTH_SHORT).show();
                        finish();
                    }

                } else {

                    Toast.makeText(MainActivity.this, "Wrong!", Toast.LENGTH_SHORT).show();
                    //마지막 문제 체크
                    if (turn < list.size()) {
                        turn++;
                        newQuestion(turn);

                    } else {
                        Toast.makeText(MainActivity.this, "You lost the game!", Toast.LENGTH_SHORT).show();
                        finish();
                    }

                }

            }
        });

        b_answer3.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // 정답 체크
                if (b_answer3.getText().toString().equalsIgnoreCase(list.get(turn - 1).getName())) {
                    Toast.makeText(MainActivity.this, "Correct!", Toast.LENGTH_SHORT).show();

                    //마지막 문제 체크
                    if (turn < list.size()) {
                        turn++;
                        newQuestion(turn);

                    } else {
                        Toast.makeText(MainActivity.this, "You finished the game!", Toast.LENGTH_SHORT).show();
                        finish();
                    }

                } else {

                    Toast.makeText(MainActivity.this, "Wrong!", Toast.LENGTH_SHORT).show();
                    //마지막 문제 체크
                    if (turn < list.size()) {
                        turn++;
                        newQuestion(turn);

                    } else {
                        Toast.makeText(MainActivity.this, "You lost the game!", Toast.LENGTH_SHORT).show();
                        finish();
                    }

                }
            }
        });

        b_answer4.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // 정답 체크
                if (b_answer4.getText().toString().equalsIgnoreCase(list.get(turn - 1).getName())) {
                    Toast.makeText(MainActivity.this, "Correct!", Toast.LENGTH_SHORT).show();

                    //마지막 문제 체크
                    if (turn < list.size()) {
                        turn++;
                        newQuestion(turn);

                    } else {
                        Toast.makeText(MainActivity.this, "You finished the game!", Toast.LENGTH_SHORT).show();
                        finish();
                    }

                } else {

                    Toast.makeText(MainActivity.this, "Wrong!", Toast.LENGTH_SHORT).show();
                    //마지막 문제 체크
                    if (turn < list.size()) {
                        turn++;
                        newQuestion(turn);

                    } else {
                        Toast.makeText(MainActivity.this, "You lost the game!", Toast.LENGTH_SHORT).show();
                        finish();
                    }

                }
            }
        });

    }

    private void newQuestion(int number) {
        // 국기 이미지를 스크린에 세팅한다.
        iv_flag.setImageResource(list.get(number - 1).getImage());

        int correct_answer = r.nextInt(4) + 1;

        int firstButton = number - 1;
        int secondButton;
        int thirdButton;
        int forthButton;

        switch (correct_answer) {
            case 1:
                b_answer1.setText(list.get(firstButton).getName());
                do {
                    secondButton = r.nextInt(list.size());
                } while (secondButton == firstButton);
                do {
                    thirdButton = r.nextInt(list.size());
                } while (thirdButton == firstButton || thirdButton == secondButton);
                do {
                    forthButton = r.nextInt(list.size());
                } while (forthButton == firstButton || forthButton == secondButton || forthButton == thirdButton);

                b_answer2.setText(list.get(secondButton).getName());
                b_answer3.setText(list.get(thirdButton).getName());
                b_answer4.setText(list.get(forthButton).getName());

                break;
            case 2:
                b_answer2.setText(list.get(firstButton).getName());
                do {
                    secondButton = r.nextInt(list.size());
                } while (secondButton == firstButton);
                do {
                    thirdButton = r.nextInt(list.size());
                } while (thirdButton == firstButton || thirdButton == secondButton);
                do {
                    forthButton = r.nextInt(list.size());
                } while (forthButton == firstButton || forthButton == secondButton || forthButton == thirdButton);

                b_answer1.setText(list.get(secondButton).getName());
                b_answer3.setText(list.get(thirdButton).getName());
                b_answer4.setText(list.get(forthButton).getName());
                break;
            case 3:
                b_answer3.setText(list.get(firstButton).getName());
                do {
                    secondButton = r.nextInt(list.size());
                } while (secondButton == firstButton);
                do {
                    thirdButton = r.nextInt(list.size());
                } while (thirdButton == firstButton || thirdButton == secondButton);
                do {
                    forthButton = r.nextInt(list.size());
                } while (forthButton == firstButton || forthButton == secondButton || forthButton == thirdButton);

                b_answer2.setText(list.get(secondButton).getName());
                b_answer1.setText(list.get(thirdButton).getName());
                b_answer4.setText(list.get(forthButton).getName());
                break;
            case 4:
                b_answer4.setText(list.get(firstButton).getName());
                do {
                    secondButton = r.nextInt(list.size());
                } while (secondButton == firstButton);
                do {
                    thirdButton = r.nextInt(list.size());
                } while (thirdButton == firstButton || thirdButton == secondButton);
                do {
                    forthButton = r.nextInt(list.size());
                } while (forthButton == firstButton || forthButton == secondButton || forthButton == thirdButton);

                b_answer2.setText(list.get(secondButton).getName());
                b_answer3.setText(list.get(thirdButton).getName());
                b_answer1.setText(list.get(forthButton).getName());
                break;

        }


    }


}

https://play.google.com/store/apps/details?id=com.jw.quizshow 

세계 국기&수도 맞추기 퀴즈 앱 - Google Play 앱