android - 可扩展 ListView 适配器 getView() 重复位置

Question

当我在下方滚动时，我的 ExpandableListView 的适配器会重复 View 和图像的位置是我的代码。我在没有 View holder 和有 View holder 的情况下使用它，在这两种情况下我都遇到了这个问题。

public View getGroupView(int groupPosition, boolean isExpanded,
                         View convertView, ViewGroup parent) {

    View view = convertView;
    String groupName = (String) getGroup(groupPosition);

    if (view == null) {
        LayoutInflater inf = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        view = inf.inflate(R.layout.group_item, null);
        holder = new ViewHolder();

        holder.arrowImage = (ImageView) view.findViewById(R.id.imageView1);
        setImageView(holder.arrowImage, groupPosition);
        view.setTag(holder);
        holder.groupName = (TextView) view.findViewById(R.id.laptop);
        holder.groupName.setTypeface(null, Typeface.BOLD);
        holder.groupName.setText(groupName);

    } else {
        holder = (ViewHolder) view.getTag();
        holder.groupName = (TextView) view.findViewById(R.id.laptop);
        holder.groupName.setTypeface(null, Typeface.BOLD);
        holder.groupName.setText(groupName);
    }

    return view;

}

public ImageView getImageView(int position) {
    return images[position];
}

public void setImageView(ImageView image, int position) {
    images[position] = image;
}

static class ViewHolder {
    ImageView arrowImage;
    TextView groupName;
}

Answer 1

不要通过标签选择 View

使用这个

public View getGroupView(int groupPosition, boolean isExpanded,
                         View convertView, ViewGroup parent) {

    View view = convertView;
    String groupName = (String) getGroup(groupPosition);

    LayoutInflater inf = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        view = inf.inflate(R.layout.group_item, null);
        holder = new ViewHolder();

        holder.arrowImage = (ImageView) view.findViewById(R.id.imageView1);
        holder.groupName = (TextView) view.findViewById(R.id.laptop);
        holder.groupName.setTypeface(null, Typeface.BOLD);
        holder.groupName.setText(groupName);
        setImageView(holder.arrowImage, groupPosition);
        view.setTag(holder);

    return view;

}

public ImageView getImageView(int position) {
    return images[position];
}

public void setImageView(ImageView image, int position) {
    images[position] = image;
}

static class ViewHolder {
    ImageView arrowImage;
    TextView groupName;
}

这将防止图像重复并将每个 View 视为一个新 View