Kent Stole Quiz App

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical">

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:src="@drawable/kentecloth"
        android:layout_weight="1"/>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Test Your Knowledge of the Kente Stole"
        android:textSize="24sp"
        android:gravity="center"
        android:textStyle="bold"
        android:textColor="@android:color/black"/>

    <TextView
        android:id="@+id/question"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="24sp"
        android:text=""
        android:textColor="@android:color/black"/>
    <RadioGroup
        android:id="@+id/all_radio_buttons"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical">
        <RadioButton
            android:id="@+id/black_radio_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Black"
            android:textAppearance="?android:textAppearanceMedium"
            android:onClick="answerQuestion"/>
        <RadioButton
            android:id="@+id/gold_radio_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Gold"
            android:textAppearance="?android:textAppearanceMedium"
            android:onClick="answerQuestion"/>
        <RadioButton
            android:id="@+id/white_radio_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="White"
            android:textAppearance="?android:textAppearanceMedium"
            android:onClick="answerQuestion"/>
        <RadioButton
            android:id="@+id/red_radio_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Red"
            android:textAppearance="?android:textAppearanceMedium"
            android:onClick="answerQuestion"/>
        <RadioButton
            android:id="@+id/green_radio_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Green"
            android:textAppearance="?android:textAppearanceMedium"
            android:onClick="answerQuestion"/>
    </RadioGroup>

    <TextView
        android:id="@+id/results"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text=""
        android:textSize="32sp"/>

    <TextView
        android:id="@+id/score"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Score: "
        android:textSize="32sp"/>
</LinearLayout>

Mainactivity.java

package com.shamikalashawn.quizapp;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;

import java.util.*;
import java.util.Random;


public class MainActivity extends AppCompatActivity {
    Integer questionNumber = 0;
    Integer score = 0;
    Integer numberOfQuestions = 0;
    ArrayList usedQuestions = new ArrayList();
    HashMap questions = new HashMap();
    HashMap answers = new HashMap();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        //populate list of questions
        questions.put(1, "Which color represents posterity?");
        questions.put(2, "Which color represents maturity?");
        questions.put(3, "Which color represents pureness?");
        questions.put(4, "Which color represents mourning?");
        questions.put(5, "Which color represents spiritual growth?");

        numberOfQuestions = questions.size();

        //set answers
        answers.put("Which color represents posterity?", "Gold");
        answers.put("Which color represents maturity?", "Black");
        answers.put("Which color represents pureness?", "White");
        answers.put("Which color represents mourning?", "Red");
        answers.put("Which color represents spiritual growth?", "Green");


        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //select and display random question
        pickQuestion();

        //display score
        displayScore();


    }

    /**
     * When radio button is clicked, this method checks the answer, updates the score, and displays a new question
     */
    public void answerQuestion(View view) {
        //capture correct answer for current question
        String currentQuestion = questions.get(questionNumber).toString();
        String correctAnswer = answers.get(currentQuestion).toString();
        //determine which radio button is checked and compare to question's correct answer

//        boolean checked = ((RadioButton) view).isChecked();
//
//        switch (view.getId()){
//            case R.id.black_radio_button:
//                if (checked && correctAnswer == "Black"){
//                    score += 10;
//                    uncheck(R.id.black_radio_button);
//                    Toast.makeText(getBaseContext(), "That's correct! You earned 10 more points!!", Toast.LENGTH_SHORT).show();
//                    break;
//                }
//
//            case R.id.gold_radio_button:
//                if (checked && correctAnswer == "Gold"){
//                    score += 10;
//                    uncheck(R.id.gold_radio_button);
//                    Toast.makeText(getBaseContext(), "That's correct! You earned 10 more points!!", Toast.LENGTH_SHORT).show();
//                    break;
//                }
//
//            case R.id.green_radio_button:
//                if (checked && correctAnswer == "Green"){
//                    score += 10;
//                    uncheck(R.id.green_radio_button);
//                    Toast.makeText(getBaseContext(), "That's correct! You earned 10 more points!!", Toast.LENGTH_SHORT).show();
//                    break;
//                }
//
//
//            case R.id.white_radio_button:
//                if (checked && correctAnswer == "White"){
//                    score += 10;
//                    uncheck(R.id.white_radio_button);
//                    Toast.makeText(getBaseContext(), "That's correct! You earned 10 more points!!", Toast.LENGTH_SHORT).show();
//                    break;
//                }
//
//            case R.id.red_radio_button:
//                if (checked && correctAnswer == "Red"){
//                    score += 10;
//                    uncheck(R.id.red_radio_button);
//                    Toast.makeText(getBaseContext(), "That's correct! You earned 10 more points!!", Toast.LENGTH_SHORT).show();
//                    break;
//                }
//
//                default:
//                    RadioGroup all = (RadioGroup) findViewById(R.id.all_radio_buttons);
//                    all.clearCheck();
//                    Toast.makeText(getBaseContext(), "Sorry, that is incorrect. We were looking for " + correctAnswer + ".", Toast.LENGTH_SHORT).show();
//
//        }

        RadioButton black = findViewById(R.id.black_radio_button);
        RadioButton red = findViewById(R.id.red_radio_button);
        RadioButton white = findViewById(R.id.white_radio_button);
        RadioButton gold = findViewById(R.id.gold_radio_button);
        RadioButton green = findViewById(R.id.green_radio_button);
        RadioGroup all = findViewById(R.id.all_radio_buttons);

        if (black.isChecked() && correctAnswer == "Black") {
            score += 10;
            displayResults("That's correct! You earned 10 more points!!");
        } else if (red.isChecked() && correctAnswer == "Red") {
            score += 10;
            displayResults("That's correct! You earned 10 more points!!");
        } else if (white.isChecked() && correctAnswer == "White") {
            score += 10;
            displayResults("That's correct! You earned 10 more points!!");
        } else if (gold.isChecked() && correctAnswer == "Gold") {
            score += 10;
            displayResults("That's correct! You earned 10 more points!!");
        } else if (green.isChecked() && correctAnswer == "Green") {
            score += 10;
            displayResults("That's correct! You earned 10 more points!!");
        } else {
            displayResults("Sorry, that is incorrect. We were looking for " + correctAnswer + ".");
        }

        //clear selection
        all.clearCheck();

        //update score
        displayScore();

        //select a new question
        pickQuestion();
    }

    /**
     * This method displays the given text on the screen.
     */
    private void displayQuestion(String message) {
        TextView questionTextView = findViewById(R.id.question);
        questionTextView.setText(message);
    }

    /**
     * This method displays the given text on the screen.
     */
    private void displayResults(String message) {
        TextView questionTextView = findViewById(R.id.results);
        questionTextView.setText(message);
    }

//    /**
//     * This method unchecks the radio button previously selected
//     */
//    private void uncheck(Integer buttonID) {
//        RadioButton selectedRadioButton = (RadioButton) findViewById(buttonID);
//        selectedRadioButton.toggle();
//    }

    /**
     * This method displays the score.
     */
    private void displayScore() {
        TextView scoreTextView = findViewById(R.id.score);
        scoreTextView.setText("Score: " + score);
    }

    /**
     * This method repopulates the hashMap of questions
     */
    public void reset() {
        usedQuestions = new ArrayList();
        score = 0;
        displayScore();
    }

    /**
     * This method picks a random question
     */
    public void pickQuestion() {
        Integer usedQuestionsLength = usedQuestions.size();

        if (usedQuestionsLength == numberOfQuestions) {
            displayResults("That's the game! Your score is " + score + ". Let's play again!");
            reset();
        }

        Random rand = new Random();
        questionNumber = rand.nextInt(numberOfQuestions) + 1;


        //pick a random index and ensure it has not been used before
        while (usedQuestions.contains(questionNumber)) {
            if (usedQuestionsLength < numberOfQuestions) {
                questionNumber = rand.nextInt(numberOfQuestions) + 1;
            } else {
                reset();
            }

        }

        //add random question number to used questions array
        usedQuestions.add(questionNumber);

        //display random question
        String randQuestion = questions.get(questionNumber).toString();
        displayQuestion(randQuestion);

    }

}