Question

我已经通过数组添加了5个问题，但每次我的问题重复。我想我必须使用循环，但我不知道如何使用循环。任何人都可以建议我如何使用循环并停止重复我的问题。

private Question[] mQuestionBank = new Question[]{
        new Question(R.string.question_oceans, true),
        new Question(R.string.question_mideast, false),
        new Question(R.string.question_africa, false),
        new Question(R.string.question_americas, true),
        new Question(R.string.question_asia, true),
};
private int mCurrentIndex = 0;


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

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

    if (userPressedTrue == answerIsTrue) {


            righttoast();
            mCurrentIndex = (mCurrentIndex + 1) % mQuestionBank.length;
            updateQuestion();


    } else {

        wrongtoast();
        mCurrentIndex = (mCurrentIndex + 1) % mQuestionBank.length;
        updateQuestion();

    }


}

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

    mQuestionTextView = (TextView) findViewById(R.id.question_text_view);
    {
        int question = mQuestionBank[mCurrentIndex].getTextResId();
        mQuestionTextView.setText(question);

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

            checkAnswer(true);

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

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

            if (mCurrentIndex == 0) {
                return;
            }
            mCurrentIndex = (mCurrentIndex - 1) % mQuestionBank.length;
            updateQuestion();
        }
    });

}

public void righttoast() {
    LayoutInflater li = getLayoutInflater();
    View layout = li.inflate(R.layout.righttoast, (ViewGroup)       findViewById(R.id.right_toast_layout));
    Toast toast = new Toast(getApplicationContext());
    toast.setDuration(Toast.LENGTH_SHORT);
    toast.setGravity(Gravity.BOTTOM, 0, 0);
    toast.setView(layout);
    toast.show();


}

public void wrongtoast() {
    LayoutInflater li = getLayoutInflater();
    View layout = li.inflate(R.layout.wrongtoast, (ViewGroup) findViewById(R.id.wrong_toast_layout));
    Toast toast = new Toast(getApplicationContext());
    toast.setDuration(Toast.LENGTH_SHORT);
    toast.setGravity(Gravity.BOTTOM, 0, 0);
    toast.setView(layout);
    toast.show();
}


}

Answer 1

将updateQuestion方法更改为：

private void updateQuestion() {
    if(mCurrentIndex < mQuestionBank.length()){
        int question = mQuestionBank[mCurrentIndex].getTextResId();
        mCurrentIndex++;
        mQuestionTextView.setText(question);
    }
}

然后将checkAnswer方法更改为：

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

    if (userPressedTrue == answerIsTrue) {
        righttoast();
        updateQuestion();
    } else {
        wrongtoast();
        updateQuestion();
    }
}

如何在Android中使用数组停止重复我的问题

1 个答案: