java - Android 数组不工作的测验

Question

我目前正在使用数组和单选按钮进行 10 个问题的多项选择测验。测验本身使用 android studio 通过 genymotion 在模拟器上运行，但答案和问题以及正确答案字段均显示为空白。我已经使用点击监听器创建了测验，但它似乎没有点击到下一个屏幕。我尝试过更改各种代码，但似乎找不到任何将数组读入单选按钮 a、b、c 和 d 的内容。有人能解决这个问题吗？我已附上代码，我认为代码应该正确递增，尽管我还必须添加 8 个问题。

package com.quiz.newquiz.app;

import android.app.Activity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends Activity {

    private int currentQuestion;
    private String [] questions;
    private String [] answers;

    private Button answerButton;
    private Button questionButton;
    private TextView questionView;
    private TextView answerView;
    private EditText answerText;

    @Override

        public void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initialise();
    }

    public void initialise()
    {
        questions = new String[]{"What is the capital of Egypt?","What class are you in?"};
        answers = new String[] {"Cairo","Class B"};
        answerButton = (Button)findViewById(R.id.AnswerButton);
        questionButton = (Button)findViewById(R.id.QuestionButton);
        questionView = (TextView)findViewById(R.id.QuestionTextView);
        answerView = (TextView)findViewById(R.id.AnswerTextView);
        answerText = (EditText)findViewById(R.id.AnswerText);
        answerButton.setOnClickListener(new View.OnClickListener(){

            @Override

        public void onClick(View view){
                checkAnswer();
            }
        });

        questionButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                showQuestion();


            }
        });
    }
    public void showQuestion()
    { currentQuestion=0;
            if(currentQuestion<10)
                currentQuestion++;
        questionView.setText(questions[currentQuestion]);
        answerView.setText("");
        answerText.setText("");
    }

    public boolean isCorrect(String answer)
    {
        return (answer.equalsIgnoreCase(answers[currentQuestion]));
    }
    public void checkAnswer()
    {
        String answer = answerText.getText().toString();
        if(isCorrect(answer))
            answerView.setText("You are correct!");
        else
            answerView.setText("Sorry, the correct answer is " + answers[currentQuestion]);


    }
}

Answer 1

在代码中查看这一行:

 public void showQuestion()
{ currentQuestion=0;
        if(currentQuestion<10)
            currentQuestion++;
    questionView.setText(questions[currentQuestion]);
    answerView.setText("");
    answerText.setText("");
}

您的 currentQuestion 变量始终被分配值 0 并被检查。在您的点击监听器中增加当前问题。

questionButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
        currentQuestion++;               
        showQuestion();

        }
    });