Android Studio 相關問題

Question

我是初學者。 我無法解決這兩個問題：

1：

錯誤：(20, 20) 錯誤：找不到符號變量 mQuestionBank

2：

錯誤：(20, 20) 錯誤：找不到符號變量 mQuestionBank

代碼：

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class QuizActivity extends AppCompatActivity {

    private android.widget.Button mTrueButton;
    private android.widget.Button mFalseButton;
    private Button mNextButton;
    private TextView mQuestionTextView;

    private int mCurrentIndex = 0;

    private void updateQuestion() {
        int question;
        question = mQuestionBank[mCurrentIndex].getQuestion();
        mQuestionTextView.setText(question);
    }

    private void checkAnswer(boolean userPressedTrue) {
        boolean answerIsTrue = mQuestionBank[mCurrentIndex].isTrueQuestion();

        int messageResId = 0;

        if (userPressedTrue == answerIsTrue) {
            messageResId = R.string.correct_toast;
        } else {
            messageResId = R.string.incorrect_toast;
        }
        Toast.makeText(this, messageResId , Toast.LENGTH_SHORT)
                .show();
    }

    private TrueFalse[] mQuesionBank = new TrueFalse[] {
            new TrueFalse(R.string.question_1, false),
            new TrueFalse(R.string.question_2, true),
            new TrueFalse(R.string.question_3, false),
    };

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

        mQuestionTextView = (TextView)findViewById(R.id.question_text_view);

        mTrueButton = (android.widget.Button)findViewById(R.id.true_button);
        mTrueButton.setOnClickListener(new android.view.View.OnClickListener() {
            @Override
            public void onClick(android.view.View v) {
                checkAnswer(true);
            }
        });

        mFalseButton = (android.widget.Button)findViewById(R.id.false_button);
        mFalseButton.setOnClickListener(new android.view.View.OnClickListener() {
            public void onClick(android.view.View v) {
                checkAnswer(false);
            }
        });

        mNextButton = (Button)findViewById(R.id.next_button);
        mNextButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mCurrentIndex = (mCurrentIndex + 1) % mQuestionBank.length;
                updateQuestion();
            }
        });

        updateQuestion();

    }
}

我將非常感謝那些能夠理解和清楚解釋的人！

Answer 1

你打錯字了

private TrueFalse[] mQuesionBank = new TrueFalse[] {
        new TrueFalse(R.string.question_1, false),
        new TrueFalse(R.string.question_2, true),
        new TrueFalse(R.string.question_3, false),
};

有一噸mQuesionBank失蹤。 它應該是 mQuestionBank。