阻止用户输入多个答案

如何解决阻止用户输入多个答案

我创建了一个正确/错误的测验应用程序。在该应用程序中，我有4个按钮，即True，False，prevIoUs（返回上一个问题），next（获得下一个问题）。我想添加一个功能，当用户单击“是”或“假”按钮时，该按钮将禁用该问题，因此用户只能单击一个问题。

我试图通过使用button.setEnabled（false）禁用按钮，但是当我单击上一个按钮或下一个按钮时，启用了true / false按钮。我希望用户只能单击一次答案，无论如何很多用户遍历这个问题。

我尝试在以前的单击按钮上调用setEnabledButton（），但是它禁用了该按钮，但是它也禁用了用户是否单击答案。

Button btrue,bfalse,bnext,bprevIoUs;
TextView tquestion;
int mCurrentIndex=0;
Questions[] questionbank;

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

    btrue=findViewById(R.id.true_button);
    bfalse=findViewById(R.id.false_button);
    bnext=findViewById(R.id.next_button);
    tquestion=findViewById(R.id.question_text);
    bprevIoUs=findViewById(R.id.prevIoUs_button);


    questionbank = new Questions[]
             {

                new Questions(R.string.greater,false),new Questions(R.string.Pm,true),new Questions(R.string.capital,new Questions(R.string.china,new Questions(R.string.Richer,new Questions(R.string.company,new Questions(R.string.company1,};


         update();

         bnext.setonClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            int s=questionbank.length;
            if( mCurrentIndex<=s  )
                {
                    if (mCurrentIndex + 1 < questionbank.length) {
                        mCurrentIndex++;

                    }
                    else
                    {   Toast.makeText(getApplicationContext(),"not more question",Toast.LENGTH_SHORT).show();
                    }
                    update();

            }
        }
    });


    btrue.setonClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            checkAnswer(true);

        }
    });

    bfalse.setonClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
               checkAnswer(false);
        }
    });

    bprevIoUs.setonClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            if (mCurrentIndex > 0) {
                mCurrentIndex = (mCurrentIndex - 1);
                update();
            }
            else
                { Toast.makeText(getApplicationContext(),"cant go back",Toast.LENGTH_SHORT).show(); }

        }
    });

}

public void update()
{
    int ques = questionbank[mCurrentIndex].getmTextResid();
      tquestion.setText(ques);
      setButtonEnabled(true);

}

private void checkAnswer(boolean userpressedTrue)
{
    boolean answerIsTrue =
            questionbank[mCurrentIndex].ismTrueAnswer();
    int messageResId = 0;
    if (userpressedTrue == answerIsTrue) {
        setButtonEnabled(false);
        messageResId = R.string.correct_toast;
    } else {
        setButtonEnabled(false);
        messageResId = R.string.incorrect_toast;
    }
    Toast.makeText(this,messageResId,Toast.LENGTH_SHORT)
            .show();
}

private void setButtonEnabled(boolean enabled) {

    btrue.setEnabled(enabled);
    bfalse.setEnabled(enabled);
}

}

解决方法

在Questions类中，您可以创建一个方法，

public class Questions {

    boolean isQuestionAnswered;

    public boolean isQuestionAnswered() {
        return isQuestionAnswered;
    }

    public void setQuestionAnswered(boolean questionAnswered) {
        isQuestionAnswered = questionAnswered;
    }
}

private void checkAnswer(boolean userPressedTrue)
{
    questionbank[mCurrentIndex].setQuestionAnswered(true);    
    boolean answerIsTrue =
            questionbank[mCurrentIndex].ismTrueAnswer();
    int messageResId = 0;
    if (userPressedTrue == answerIsTrue) {
        setButtonEnabled(false);
        messageResId = R.string.correct_toast;
    } else {
        setButtonEnabled(false);
        messageResId = R.string.incorrect_toast;
    }
    Toast.makeText(this,messageResId,Toast.LENGTH_SHORT)
            .show();
}

public void update()
{
    int ques = questionbank[mCurrentIndex].getmTextResid();
      tquestion.setText(ques);
      if(questionbank[mCurrentIndex].isQuestionAnswered())
        setButtonEnabled(false);
      else
        setButtonEnabled(true);

}

尝试一下，检查是否可以解决您的问题