在 android 中設置多個按鈕文本

Question

我在android中寫了一個問答游戲。 我希望每次游戲進入下一個問題時，所有按鈕文本也會隨着 string.xml 中存在的每個字符串而更新。 我的 string.xml 文件包含每個問題的<string>值，如下所示：

<!-- Second question-->
<string name="secondQ_A1">Oracle</string>
<string name="secondQ_A2">Apple</string>
<string name="secondQ_A3">Sun Microsystems</string> <!-- Right answer -->
<string name="secondQ_A4">IBM</string>

這是代碼：

private Question[] questions = new Question[] {
            new Question(R.drawable.first, R.string.first_question_text, R.string.firstQ_A2),
            new Question(R.drawable.second, R.string.second_question_text, R.string.secondQ_A3),
            new Question(R.drawable.third, R.string.third_question_text, R.string.thirdQ_A2),
};

private ImageView questionImage;
private TextView questionText;
private Button[] answerButtons;

private int currentQuestion = 0;


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

        //Initializing
        initializeFields();

        int textQ = questions[currentQuestion].getResQuestionText();
        questionText.setText(textQ);
        int imageQ = questions[currentQuestion].getResQuestionImg();
        questionImage.setImageResource(imageQ);

        for (Button button : answerButtons) {
            button.setOnClickListener(v -> {
                if (currentQuestion + 1 < questions.length) {
                    currentQuestion += 1;
                    updateQuestion();
                }
            });
        }
}

public void updateQuestion() {
        int textQ = questions[currentQuestion].getResQuestionText();
        questionText.setText(textQ);
        int imageQ = questions[currentQuestion].getResQuestionImg();
        questionImage.setImageResource(imageQ);
        List<Integer> firstQ_answers = new LinkedList<>();
        firstQ_answers.add(R.string.firstQ_A1);
        firstQ_answers.add(R.string.firstQ_A2);
        firstQ_answers.add(R.string.firstQ_A3);
        firstQ_answers.add(R.string.firstQ_A4);
        for (int i = 0; i< answerButtons.length; i++) {
            questions[currentQuestion].setOptions(firstQ_answers);
            
        answerButtons[i].setText(questions[currentQuestion].getOptions().get(i));
        }
}

還有Question class：

public class Question {

    private int resQuestionText;
    private int resQuestionImg;
    private int resAnswer;

    public Question(int resQuestionImg, int resQuestionText, int resAnswer) {
        this.resQuestionImg = resQuestionImg;
        this.resQuestionText = resQuestionText;
        this.resAnswer = resAnswer;
    }

    public int getResQuestionText() {
        return resQuestionText;
    }

    public int getResQuestionImg() {
        return resQuestionImg;
    }

    public int getResAnswer() {
        return resAnswer;
    }

}

updateQuestion()方法僅適用於問題的圖像和文本，但按鈕沒有文本。 我想用上面的 string.xml 文件值更新按鈕文本。 其實我不知道，誰能指導我？

Answer 1

從你的代碼中，你甚至沒有更新它，所以你必須在你的updateQueation()方法中做這樣的事情：

answerButtons[0].setText(getString(R.string.secondQ_A1));
answerButtons[1].setText(getString(R.string.secondQ_A2));
answerButtons[2].setText(getString(R.string.secondQ_A3));
answerButtons[3].setText(getString(R.string.secondQ_A4));

作為最佳實踐，您應該定義一個全局二維數組來保存所有問題索引及其選項，例如：

int[][] myOptions ={{allFirstQuestionAnswersResHere},{second},{third},...};

然后在 updateQuestion() 中使用問題編號從全局數組中獲取選項，例如：

for(int i=0;i<answerButtons.length();i++){
answerButtons[i].setText(myOptions[questionIndex][i]);
}

享受 ！

Answer 2

您在問題中使用 int 作為文本，這就是為什么不能這樣設置

questionText.setText(" "+textQ);

或將 int questionText 更改為 String questionText。

Answer 3

你可以通過改變你的問題 class 來達到同樣的目的

public class Question {

private int resQuestionText;
private int resQuestionImg;
private int resAnswer[];

public Question(int resQuestionImg, int resQuestionText, int resAnswer[]) {
    this.resQuestionImg = resQuestionImg;
    this.resQuestionText = resQuestionText;
    this.resAnswer = resAnswer;
}

public int getResQuestionText() {
    return resQuestionText;
}

public int getResQuestionImg() {
    return resQuestionImg;
}

public int [] getResAnswer() {
    return resAnswer;
}

}
然后在你的 updateQuestion 方法中

 public void updateQuestion() {
  // you can get array of button text for each question like below and can         update your buttons text by iterating through this array

        int buttonTexts[] = questions[currentQuestion].getResAnswer();

        int textQ = questions[currentQuestion].getResQuestionText();
        questionText.setText(textQ);
        int imageQ = questions[currentQuestion].getResQuestionImg();
        questionImage.setImageResource(imageQ);
}