Java 单击按钮后如何加载下一组元素

我正在尝试制作一个选择题应用程序。我有一个

对象列表

，其中包含所有必要的信息（问题、四个答案和一个正确答案）。四个按钮将四个答案指定为文本

当用户单击按钮时，应用程序会检查所选答案是否正确。我需要将下一组信息加载到各个组件

尝试在

onClick

方法内调用

loadQuestionElements

，但未生成请求的结果

主要活动

---

创建一个新方法，并在每个switch case语句之后调用此方法

private void getNewQuestion(){
    this.question = loadQuestionElements(questions, iterator, tQuestion, answer1, answer2, answer3, answer4);
    this.correctAnswer = question.getCorrectAnswer();
    }

现在对于switch case，在每个case之后，您必须加载新问题

switch(v.getId()){
        case R.id.bAnswer1:
            if (this.question.isCorrect(button.getText().toString(),this.correctAnswer)){
                button.setBackgroundColor(0xFF4CAF50);//Set button background color to green
            }else{
                button.setBackgroundColor(0xFFF44336);//Set button background color to red
            }
             getNewQuestion();
             break;
        case R.id.bAnswer2:
            if (this.question.isCorrect(button.getText().toString(),this.correctAnswer)){
                button.setBackgroundColor(0xFF4CAF50);//Set button background color to green
            }else{
                button.setBackgroundColor(0xFFF44336);//Set button background color to red
            }
            getNewQuestion();
            break;
        case R.id.bAnswer3:
            if (this.question.isCorrect(button.getText().toString(),this.correctAnswer)){
                button.setBackgroundColor(0xFF4CAF50);//Set button background color to green
            }else{
                button.setBackgroundColor(0xFFF44336);//Set button background color to red
            }
            getNewQuestion();
            break;
        case R.id.bAnswer4:
            if (this.question.isCorrect(button.getText().toString(),this.correctAnswer)){
                button.setBackgroundColor(0xFF4CAF50);//Set button background color to green
            }else{
                button.setBackgroundColor(0xFFF44336);//Set button background color to red
            }
            getNewQuestion();
            break;
   }

---

在从问题列表中获取新问题之前，请确保检查列表大小。问题q=问题.get（迭代器）；否则，索引越界异常可能会发生。看起来并不是那么容易，或者我遗漏了一些东西。如果我实现了

getNewQuestion

，我将无法访问

onCreate

方法中的UI组件。将它们声明为全局私有TextView tQuestion；专用按钮应答器1、应答器2、应答器3、应答器4；你的问题还在吗？

 @Override
public void onClick(View v) {
    Button button = (Button) v;

    switch(v.getId()){
        case R.id.bAnswer1:
            if (this.question.isCorrect(button.getText().toString(),this.correctAnswer)){
                button.setBackgroundColor(0xFF4CAF50);//Set button background color to green
            }else{
                button.setBackgroundColor(0xFFF44336);//Set button background color to red
            }
        case R.id.bAnswer2:
            if (this.question.isCorrect(button.getText().toString(),this.correctAnswer)){
                button.setBackgroundColor(0xFF4CAF50);//Set button background color to green
            }else{
                button.setBackgroundColor(0xFFF44336);//Set button background color to red
            }
        case R.id.bAnswer3:
            if (this.question.isCorrect(button.getText().toString(),this.correctAnswer)){
                button.setBackgroundColor(0xFF4CAF50);//Set button background color to green
            }else{
                button.setBackgroundColor(0xFFF44336);//Set button background color to red
            }
        case R.id.bAnswer4:
            if (this.question.isCorrect(button.getText().toString(),this.correctAnswer)){
                button.setBackgroundColor(0xFF4CAF50);//Set button background color to green
            }else{
                button.setBackgroundColor(0xFFF44336);//Set button background color to red
            }
   }
}

private void getNewQuestion(){
    this.question = loadQuestionElements(questions, iterator, tQuestion, answer1, answer2, answer3, answer4);
    this.correctAnswer = question.getCorrectAnswer();
    }

switch(v.getId()){
        case R.id.bAnswer1:
            if (this.question.isCorrect(button.getText().toString(),this.correctAnswer)){
                button.setBackgroundColor(0xFF4CAF50);//Set button background color to green
            }else{
                button.setBackgroundColor(0xFFF44336);//Set button background color to red
            }
             getNewQuestion();
             break;
        case R.id.bAnswer2:
            if (this.question.isCorrect(button.getText().toString(),this.correctAnswer)){
                button.setBackgroundColor(0xFF4CAF50);//Set button background color to green
            }else{
                button.setBackgroundColor(0xFFF44336);//Set button background color to red
            }
            getNewQuestion();
            break;
        case R.id.bAnswer3:
            if (this.question.isCorrect(button.getText().toString(),this.correctAnswer)){
                button.setBackgroundColor(0xFF4CAF50);//Set button background color to green
            }else{
                button.setBackgroundColor(0xFFF44336);//Set button background color to red
            }
            getNewQuestion();
            break;
        case R.id.bAnswer4:
            if (this.question.isCorrect(button.getText().toString(),this.correctAnswer)){
                button.setBackgroundColor(0xFF4CAF50);//Set button background color to green
            }else{
                button.setBackgroundColor(0xFFF44336);//Set button background color to red
            }
            getNewQuestion();
            break;
   }