Android 滚动后，回收器视图中的卡片视图混乱不堪

我正在构建一个Android问答应用程序。问题保存在SQLite数据库中，并随机挑选出来

对于回答的每个问题，我都将答案存储在字符串数组列表中。最后，我有一个RecyclerView，显示包含问题和答案的卡片视图。我将两个列表传递给构造函数-第一个列表包含问题（带答案），第二个列表包含选定的答案

如果用户的答案是正确的，则该答案为绿色。如果答案不正确，则该答案为红色，正确答案为绿色

当显示结果时，一切都是正确的。但在向下滚动，使卡不再可见，然后再向上滚动后，颜色不再正确

屏幕截图： “Pravilen”表示正确，“Napačen”表示不正确/错误。在所有4个案例中，我都选择了最下面的答案（即使答案不正确）

有人知道为什么会这样吗？在过去的两天里，我一直在努力解决这个问题，但我不知道哪里出了问题。提前谢谢

回收器视图适配器代码（很抱歉，格式可能不正确）：

公共类RVAdapter扩展了RecyclerView.Adapter{ 列表问题列表； ArrayList选择的答案； 公共静态类问题ViewHolder扩展了RecyclerView.ViewHolder{ 卡德维尤； 文本视图问题； 文本视图回答1； 文本视图回答2； 文本视图回答3； 文本视图回答4； 问题视图持有者（查看项目视图）{ 超级（项目视图）； cardView=（cardView）itemView.findViewById（R.id.cardView）； 问题=（TextView）itemView.findViewById（R.id.resultQuestion）； answer1=（TextView）itemView.findViewById（R.id.resultAnswer1）； answer2=（TextView）itemView.findViewById（R.id.resultAnswer2）； answer3=（TextView）itemView.findViewById（R.id.resultAnswer3）； answer4=（TextView）itemView.findViewById（R.id.resultAnswer4）； } } 公共RVAdapter（列表问题列表、阵列列表选择答案）{ this.questionList=问题列表； this.selectedAnswers=selectedAnswers； } @凌驾 公共问题ViewHolder onCreateViewHolder（ViewGroup ViewGroup，int viewType）{ View View=LayoutInflater.from（viewGroup.getContext（））.flate（R.layout.card_视图，viewGroup，false）； 返回新问题视图持有者（视图）； } @凌驾 公共无效onBindViewHolder（问题视图持有人，内部位置）{ holder.question.setText（questionList.get（position.getQuestion（））； String answer1=questionList.get（position.getAnswer1（）； String answer2=questionList.get（position.getAnswer2（）； String answer3=questionList.get（position.getAnswer3（）； String answer4=questionList.get（position.getAnswer4（）； String correctAnswer=questionList.get（position.getCorrectAnswer（）； 字符串selectedAnswer=selectedAnswers.get（位置）； if（answer1==null）{ 持有者。回答1。设置可见性（视图。消失）； }否则{ 支架.回答1.设置可见性（视图.可见）； holder.answer1.setText（answer1）； 如果（答案1.等于（正确答案））{ 持有者。回答1。setTextColor（颜色。绿色）； }else if（回答1.等于（选择回答））{ 持有者。回答1。setTextColor（颜色。红色）； } } if（answer2==null）{ holder.answer2.setVisibility（视图已消失）； }否则{ 支架。应答2。设置可见性（视图。可见）； holder.answer2.setText（answer2）； 如果（回答2.等于（正确回答））{ 持有者。回答2。setTextColor（颜色。绿色）； }else if（回答2.等于（选择回答））{ 持有者。回答2。setTextColor（颜色。红色）； } } if（answer3==null）{ 持有者。回答3。设置可见性（视图。消失）； }否则{ 支架.回答3.设置可见性（视图.可见）； holder.answer3.setText（answer3）； 如果（答案3.等于（正确答案））{ 持有者。回答者3。setTextColor（颜色。绿色）； }else if（回答3.等于（选择回答））{ 持有者。回答3。setTextColor（颜色。红色）； } } if（answer4==null）{ 持有者。回答4。设置可见性（视图。消失）； }否则{ 支架.回答4.设置可见性（视图.可见）； holder.answer4.setText（answer4）； 如果（答案4.等于（正确答案））{ 持有者。回答4。setTextColor（颜色。绿色）； }else if（回答4.等于（选择回答））{ 持有者。回答4。setTextColor（颜色。红色）； } } }

---

您可以在

onBindViewHolder

中设置标记：

@Override
public void onBindViewHolder(QuestionViewHolder holder, int position) {
    holder.question.setText(questionList.get(position).getQuestion());
//add tags for all ViewHolder items
    holder.question.setTag(questionList.get(position));
    String answer1 = questionList.get(position).getAnswer1();
    String answer2 = questionList.get(position).getAnswer2();
    String answer3 = questionList.get(position).getAnswer3();
    String answer4 = questionList.get(position).getAnswer4();
    String correctAnswer = questionList.get(position).getCorrectAnswer();
    String selectedAnswer = selectedAnswers.get(position);

    if (answer1 == null) {
        holder.answer1.setVisibility(View.GONE);
    } else {
        holder.answer1.setVisibility(View.VISIBLE);
        holder.answer1.setText(answer1);
        if (answer1.equals(correctAnswer)) {
            holder.answer1.setTextColor(Color.GREEN);
        } else if (answer1.equals(selectedAnswer)) {
            holder.answer1.setTextColor(Color.RED);
        }
    }
    if (answer2 == null) {
        holder.answer2.setVisibility(View.GONE);
    } else {
        holder.answer2.setVisibility(View.VISIBLE);
        holder.answer2.setText(answer2);
        if (answer2.equals(correctAnswer)) {
            holder.answer2.setTextColor(Color.GREEN);
        } else if (answer2.equals(selectedAnswer)) {
            holder.answer2.setTextColor(Color.RED);
        }
    }
    if (answer3 == null) {
        holder.answer3.setVisibility(View.GONE);
    } else {
        holder.answer3.setVisibility(View.VISIBLE);
        holder.answer3.setText(answer3);
        if (answer3.equals(correctAnswer)) {
            holder.answer3.setTextColor(Color.GREEN);
        } else if (answer3.equals(selectedAnswer)) {
            holder.answer3.setTextColor(Color.RED);
        }
    }
    if (answer4 == null) {
        holder.answer4.setVisibility(View.GONE);
    } else {
        holder.answer4.setVisibility(View.VISIBLE);
        holder.answer4.setText(answer4);
        if (answer4.equals(correctAnswer)) {
            holder.answer4.setTextColor(Color.GREEN);
        } else if (answer4.equals(selectedAnswer)) {
            holder.answer4.setTextColor(Color.RED);
        }
    }

---

您可以在

onBindViewHolder

中设置标记：

@Override
public void onBindViewHolder(QuestionViewHolder holder, int position) {
    holder.question.setText(questionList.get(position).getQuestion());
//add tags for all ViewHolder items
    holder.question.setTag(questionList.get(position));
    String answer1 = questionList.get(position).getAnswer1();
    String answer2 = questionList.get(position).getAnswer2();
    String answer3 = questionList.get(position).getAnswer3();
    String answer4 = questionList.get(position).getAnswer4();
    String correctAnswer = questionList.get(position).getCorrectAnswer();
    String selectedAnswer = selectedAnswers.get(position);

    if (answer1 == null) {
        holder.answer1.setVisibility(View.GONE);
    } else {
        holder.answer1.setVisibility(View.VISIBLE);
        holder.answer1.setText(answer1);
        if (answer1.equals(correctAnswer)) {
            holder.answer1.setTextColor(Color.GREEN);
        } else if (answer1.equals(selectedAnswer)) {
            holder.answer1.setTextColor(Color.RED);
        }
    }
    if (answer2 == null) {
        holder.answer2.setVisibility(View.GONE);
    } else {
        holder.answer2.setVisibility(View.VISIBLE);
        holder.answer2.setText(answer2);
        if (answer2.equals(correctAnswer)) {
            holder.answer2.setTextColor(Color.GREEN);
        } else if (answer2.equals(selectedAnswer)) {
            holder.answer2.setTextColor(Color.RED);
        }
    }
    if (answer3 == null) {
        holder.answer3.setVisibility(View.GONE);
    } else {
        holder.answer3.setVisibility(View.VISIBLE);
        holder.answer3.setText(answer3);
        if (answer3.equals(correctAnswer)) {
            holder.answer3.setTextColor(Color.GREEN);
        } else if (answer3.equals(selectedAnswer)) {
            holder.answer3.setTextColor(Color.RED);
        }
    }
    if (answer4 == null) {
        holder.answer4.setVisibility(View.GONE);
    } else {
        holder.answer4.setVisibility(View.VISIBLE);
        holder.answer4.setText(answer4);
        if (answer4.equals(correctAnswer)) {
            holder.answer4.setTextColor(Color.GREEN);
        } else if (answer4.equals(selectedAnswer)) {
            holder.answer4.setTextColor(Color.RED);
        }
    }

---

我以一种不同的方式解决了您的问题，希望它能有所帮助

public class Question {
List<String> options = new ArrayList<String>();
String correctAnswer;
String question;

public List<String> getOptions() {
    return options;
}

public String getCorrectAnswer() {
    return correctAnswer;
}

public String getQuestion() {
    return question;
}

public void setOptions(List<String> options) {
    this.options = options;
}

public void setCorrectAnswer(String correctAnswer) {
    this.correctAnswer = correctAnswer;
}

public void setQuestion(String question) {
    this.question = question;
  }
}


public class selectedAnswer {
String selectedAnswer;

public String getSelectedAnswer() {
    return selectedAnswer;
}

public void setSelectedAnswer(String selectedAnswer) {
    this.selectedAnswer = selectedAnswer;
 }
}

public class RVAdapter extends RecyclerView.Adapter<RVAdapter.QuestionViewHolder> {

List<Question> questionList = new ArrayList<>();
List<selectedAnswer> selectedAnswers = new ArrayList<>();

public static class QuestionViewHolder extends RecyclerView.ViewHolder {
    CardView cardView;
    TextView question;
    TextView answer1;
    TextView answer2;
    TextView answer3;
    TextView answer4;

    QuestionViewHolder(View itemView) {
        super(itemView);
        cardView = (CardView) itemView.findViewById(R.id.cardView);
        question = (TextView) itemView.findViewById(R.id.resultQuestion);
        answer1 = (TextView) itemView.findViewById(R.id.resultAnswer1);
        answer2 = (TextView) itemView.findViewById(R.id.resultAnswer2);
        answer3 = (TextView) itemView.findViewById(R.id.resultAnswer3);
        answer4 = (TextView) itemView.findViewById(R.id.resultAnswer4);
    }
}


public RVAdapter(List<Question> questionList, List<selectedAnswer> selectedAnswers) {
    this.questionList = questionList;
    this.selectedAnswers = selectedAnswers;
}


@Override
public QuestionViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
    View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.card_view, viewGroup, false);
    return new QuestionViewHolder(view);
}


@Override
public void onBindViewHolder(QuestionViewHolder holder, int position) {
    holder.answer1.setVisibility(View.GONE);
    holder.answer2.setVisibility(View.GONE);
    holder.answer3.setVisibility(View.GONE);
    holder.answer4.setVisibility(View.GONE);
    holder.question.setText(questionList.get(position).getQuestion());
    if(questionList.get(position).getCorrectAnswer() == selectedAnswers.get(position).getSelectedAnswer())
    {
        holder.answer1.setText(selectedAnswers.get(position).getSelectedAnswer());
        holder.answer1.setVisibility(View.VISIBLE);
        holder.answer1.setTextColor(Color.GREEN);
        questionList.get(position).getOptions().remove(position);
    }

    else
    {
        for(int i=0;i<questionList.get(position).getOptions().size();i++) {
            if(selectedAnswers.get(position).getSelectedAnswer() == questionList.get(position).getOptions().get(i))
            {
                holder.answer2.setText(selectedAnswers.get(position).getSelectedAnswer());
                holder.answer2.setVisibility(View.VISIBLE);
                holder.answer2.setTextColor(Color.RED);
                questionList.get(position).getOptions().remove(position);
            }
        }
    }
    if(questionList.get(position).getOptions().size() != 0)
    {
        holder.answer3.setText(questionList.get(position).getOptions().get(2));
        holder.answer3.setVisibility(View.VISIBLE);
        holder.answer4.setText(questionList.get(position).getOptions().get(3));
        holder.answer4.setVisibility(View.VISIBLE);
    }

  }
}

公开课问题{
列表选项=新建ArrayList（）；
字符串正确答案；
字符串问题；
公共列表getOptions（）{
返回选项；
}
公共字符串getCorrectAnswer（）{
返回正确答案；
}
公共字符串getQuestion（）{
返回问题；
}
公共无效设置选项（列表选项）{
this.options=选项；
}
公共无效setCorrectAnswer（字符串correctAnswer）{
this.correctAnswer=correctAnswer；
}
公共问题（字符串问题）{
这个问题=问题；
}
}
公共类选择回答{
字符串选择回答；
公共字符串getSelectedAnswer（）{
返回所选答案；
}
public void setSelectedAnswer（字符串selectedAnswer）{
this.selectedAnswer=selectedAnswer；
}
}
公共类RVAdapter扩展了RecyclerView.Adapter{
List questionList=新建ArrayList（）；
List selectedAnswers=new ArrayList（）；
公共静态类问题ViewHolder扩展了RecyclerView.ViewHolder{
卡德维尤；
文本视图问题；
文本视图回答1；
文本视图回答2；
文本视图回答3；
文本视图回答4；
问题视图持有者（查看项目视图）{
超级（项目视图）；
cardView=（cardView）itemView.findViewById（R.id.ca
@Override
public void onBindViewHolder(QuestionViewHolder holder, int position) {

    String question = questionList.get(position).getQuestion();
    String answer1 = questionList.get(position).getAnswer1();
    String answer2 = questionList.get(position).getAnswer2();
    String answer3 = questionList.get(position).getAnswer3();
    String answer4 = questionList.get(position).getAnswer4();
    String correctAnswer = questionList.get(position).getCorrectAnswer();
    String selectedAnswer = selectedAnswers.get(position);

    // Clear any previous attributes.
    holder.question.setText(null);
    holder.answer1.setText(null);
    holder.answer2.setText(null);
    holder.answer3.setText(null);
    holder.answer4.setText(null);
    holder.answer1.setTextColor(Color.BLACK);
    holder.answer2.setTextColor(Color.BLACK);
    holder.answer3.setTextColor(Color.BLACK);
    holder.answer4.setTextColor(Color.BLACK);

    holder.question.setText(question);
    // ... if statements follow below ...