Question

我有两种答案的调查：

1）打开（复选框或单选按钮）+（用户可输入文字） 2）普通（复选框或单选按钮）

当我有一个像20+元素这样的大型列表时，ListView会显示错误的答案类型。

我猜问题是getItem（），因为答案的类型取决于它的数据。

我已经尝试了很多方法来解决这个问题，甚至没有提到所有的stackoverflow链接。也许，有人可以帮助我。

public class AnswerAdapter extends ArrayAdapter<Answer> {

public interface ActionsListener {
    void onCheckClicked(View v, Answer answer, int position);

    void onRadioClicked(View v, Answer answer, int position);

    void onOpenClicked(View v, Answer answer, int position);
}

private Display mDisplay;
private LayoutInflater mInflater;
private Context mContext;
private ActionsListener mActionsListener;
private String language;
private ArrayList<Answer> mList;


public AnswerAdapter(Context context, ArrayList<Answer> list, String language, ActionsListener actionsListener) {
    super(context, R.layout.item_answer, list);
    mList = list;
    mInflater = LayoutInflater.from(context);
    mContext = context;
    mActionsListener = actionsListener;
    this.language = language;
    mDisplay = ((WindowManager) context.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
}

@Nullable
@Override
public Answer getItem(int position) {
    return super.getItem(this.getPosition(mList.get(position)));
}

@Override
public View getView(final int position, final View convertView,
                    ViewGroup parent) {
    ViewHolder holder;
    View row = convertView;
    if (convertView == null) {
        row = mInflater.inflate(R.layout.item_answer, parent, false);
        holder = new ViewHolder();
        holder.answerTitle = (TextView) row.findViewById(R.id.answer_title);
        holder.answerRadio = (AppCompatRadioButton) row.findViewById(R.id.answer_radio);
        holder.answerCheck = (AppCompatCheckBox) row.findViewById(R.id.answer_check);
        holder.answerPicture = (ImageView) row.findViewById(R.id.answer_picture);
        holder.answerOpen = (EditText) row.findViewById(R.id.answer_open);
        holder.answerRank = (Button) row.findViewById(R.id.answer_rank);
        row.setTag(holder);
    } else
        holder = (ViewHolder) row.getTag();

    final Answer answer = getItem(position);
    final ViewHolder viewHolderFinal = holder;

    View.OnClickListener onClickListener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            switch (v.getId()) {
                case R.id.answer_check:
                    mActionsListener.onCheckClicked(v, answer, position);
                    notifyDataSetChanged();
                    break;
                case R.id.answer_radio:
                    mActionsListener.onRadioClicked(v, answer, position);
                    notifyDataSetChanged();
                    break;
                case R.id.answer_title:
                case R.id.answer_picture:
                    if (viewHolderFinal.answerCheck.isEnabled() && viewHolderFinal.answerRadio.isEnabled())
                        if (answer.getPolyAnswer()) {
                            viewHolderFinal.answerCheck.setChecked(!viewHolderFinal.answerCheck.isChecked());
                            onClick(viewHolderFinal.answerCheck);
                        } else {
                            viewHolderFinal.answerRadio.setChecked(true);
                            onClick(viewHolderFinal.answerRadio);
                        }
                    break;
                case R.id.answer_open:

                    mActionsListener.onOpenClicked(v, answer, position);

                    if (viewHolderFinal.answerCheck.isEnabled() && viewHolderFinal.answerRadio.isEnabled()) {
                        if (answer.getPolyAnswer()) {
                            onClick(viewHolderFinal.answerCheck);
                        } else {
                            onClick(viewHolderFinal.answerRadio);
                        }
                    }
                    break;
            }
        }
    };

    holder.answerTitle.setOnClickListener(onClickListener);
    holder.answerPicture.setOnClickListener(onClickListener);
    holder.answerOpen.setOnClickListener(onClickListener);
    holder.answerOpen.setHint(language); //language[6]

    holder.answerTitle.setText(answer.getTitle());
    holder.answerTitle.setTextColor(ContextCompat.getColor(mContext, R.color.colorUIWhite));

    if (answer.getPolyAnswer()) {
        holder.answerCheck.setVisibility(View.VISIBLE);
        holder.answerCheck.setChecked(answer.getCheck());
        holder.answerCheck.setEnabled(answer.getEnabled());
        holder.answerCheck.setOnClickListener(onClickListener);
    } else {
        holder.answerRadio.setVisibility(View.VISIBLE);
        holder.answerRadio.setChecked(answer.getCheck());
        holder.answerRadio.setOnClickListener(onClickListener);
    }


    if (answer.getIsOpenAnswer()) {
        holder.answerOpen.setVisibility(View.VISIBLE);
        holder.answerOpen.setText(answer.getOpenAnswer());
        holder.answerOpen.setTextColor(ContextCompat.getColor(mContext, R.color.colorUIWhite));
        holder.answerOpen.setHintTextColor(ContextCompat.getColor(mContext, R.color.colorUIWhite));
        holder.answerOpen.setError(answer.getOpenAnswerError());
    }

    return row;
}

private static class ViewHolder {
    TextView answerTitle;
    AppCompatRadioButton answerRadio;
    AppCompatCheckBox answerCheck;
    ImageView answerPicture;
    EditText answerOpen;
    Button answerRank;
}
}

Answer 1

查看您的getView()方法，我假设您最终也会遇到同时显示收音机和支票同时可见的情况。

因为getView()可以回收视图（当convertView不为null时），任何显示元素都会保持其可见性。

所以你应该在你的answer.getIsOpenAnswer()添加一个else，否则你将answerOpen的可见性设置为INVISIBLE或GONE（取决于你的设计）。

在你的answer.getPolyAnswer（）的if语句中，你需要将answerRadio设置为INVISIBLE或GONE，并在你的其他地方answerCheck to INVISIBLE或GONE。

ListView适配器返回错误的项目

1 个答案: