質問編集履歴
1
プログラム更新
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@@ -10,6 +10,84 @@
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```
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### 該当のソースコード
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package com.example.quizdb;
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import androidx.appcompat.app.AppCompatActivity;
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import android.content.res.ColorStateList;
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import android.graphics.Color;
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import android.os.Bundle;
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import android.view.View;
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import android.widget.Button;
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import android.widget.RadioButton;
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import android.widget.RadioGroup;
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import android.widget.TextView;
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import android.widget.Toast;
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import java.util.Collections;
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import java.util.List;
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public class QuizActivity extends AppCompatActivity {
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private TextView textViewQuestion;
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private TextView textViewScore;
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private TextView textViewQuestionCount;
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private TextView textViewCountDown;
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private RadioGroup rbGroup;
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private RadioButton rb1;
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private RadioButton rb2;
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private RadioButton rb3;
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private Button buttonConfirmNext;
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private ColorStateList textColorDefaultRb;
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private List<Question> questionList;
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private int questionCounter;
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private int questionCountTotal;
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private Question currentQuestion;
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private int score;
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private boolean answered;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_quiz);
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textViewQuestion = findViewById(R.id.text_view_question);
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textViewScore = findViewById(R.id.text_view_score);
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textViewQuestionCount = findViewById(R.id.text_view_question_count);
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textViewCountDown = findViewById(R.id.text_view_countdown);
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rbGroup = findViewById(R.id.radio_group);
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rb1 = findViewById(R.id.radio_button1);
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rb2 = findViewById(R.id.radio_button2);
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rb3 = findViewById(R.id.radio_button3);
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buttonConfirmNext = findViewById(R.id.button_confirm_next);
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textColorDefaultRb = rb1.getTextColors();
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QuizDbHelper dbHelper = new QuizDbHelper(this);
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questionList = dbHelper.getAllQuestions();
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questionCountTotal = questionList.size();
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Collections.shuffle(questionList);
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showNextQuestion();
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buttonConfirmNext.setOnClickListener(new View.OnClickListener() {
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@Override
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public void onClick(View v) {
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if (!answered) {
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if (rb1.isChecked() || rb2.isChecked() || rb3.isChecked()) {
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checkAnswer();
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} else {
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Toast.makeText(QuizActivity.this, "Please select an answer", Toast.LENGTH_SHORT).show();
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}
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} else {
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showNextQuestion();
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}
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}
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});
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}
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private void showNextQuestion() {
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rb1.setTextColor(textColorDefaultRb);
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rb2.setTextColor(textColorDefaultRb);
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@@ -31,4 +109,50 @@
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} else {
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finishQuiz();
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}
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}
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}
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private void checkAnswer() {
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answered = true;
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RadioButton rbSelected = findViewById(rbGroup.getCheckedRadioButtonId());
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int answerNr = rbGroup.indexOfChild(rbSelected) + 1;
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if (answerNr == currentQuestion.getAnswerNr()) {
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score++;
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textViewScore.setText("Score: " + score);
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}
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showSolution();
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}
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private void showSolution() {
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rb1.setTextColor(Color.RED);
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rb2.setTextColor(Color.RED);
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rb3.setTextColor(Color.RED);
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switch (currentQuestion.getAnswerNr()) {
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case 1:
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rb1.setTextColor(Color.GREEN);
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textViewQuestion.setText("Answer 1 is correct");
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break;
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case 2:
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rb2.setTextColor(Color.GREEN);
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textViewQuestion.setText("Answer 2 is correct");
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break;
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case 3:
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rb3.setTextColor(Color.GREEN);
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textViewQuestion.setText("Answer 3 is correct");
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break;
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}
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if (questionCounter < questionCountTotal) {
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buttonConfirmNext.setText("Next");
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} else {
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buttonConfirmNext.setText("Finish");
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}
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}
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private void finishQuiz() {
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finish();
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}
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}
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