BaseAdapter在getView()方法调用上返回错误的位置

Question

奇怪的是,我CustomBaseAdapter正在为需要充气的物品返回错误的位置,等适配器会在行上显示错误的数据类型!

虽然我正在使用该ViewHolder模式,但我的ListView layout_height设置为match_parent并且我找到的每种可能的方式,以确保ListView项目的稳定性,已经实现,CustomBaseAdapter似乎没有响应它.

getView()方法

@Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        final ViewHolder holder;
        mItemView = convertView;
        if (convertView == null) {
            mItemView = mInflater.inflate(R.layout.layout_listview_row, parent, false);
            holder = new ViewHolder();
            //setting up the Views
            mItemView.setTag(holder);
        } else {
            holder = (ViewHolder) mItemView.getTag();
        }

        //Getting the item
        final MyItem item = getItem(position);

        //Doing some checks on my item and then display the appropriate data.

        //By saying checks i mean something like: 

        if(item.getSomething().equals("blabla")){
           //Load some pic
        }else{
           //Load another pic
        }
        //Now when i have scrolled the list once and return back to top,
        //Suddenly in Logcat i am seeing that the first row is getting matched to
        //the object in the 4th position, but it doesnt display its data. It displays
        //the text from the first item as it was supposed to do. But the relation between
        //the first row and the item's position is like 0->4. 
}

其他方法

@Override
public int getCount() {
    return this.mObjects.size();
}

@Override
public MyItem getItem(int position) {
    return this.mObjects.get(position);
}

@Override
public long getItemId(int position) {
    return position;
}

我在Google上搜索并尝试了一切!似乎什么都没有给我一个解决方案.

任何帮助,将不胜感激!如果您需要更多代码,请告诉我们.

Answer 1

我怀疑这mItemView就是这里的罪魁祸首。从名称来看，这是一个实例字段，因此如果多个线程getView()在您的 中调用CustomBaseAdapter，则mItemView可能会更改它在您眼皮底下指向的回收视图。另外，我认为以getView()结尾return mItemView，对吧？

无论如何，我建议尝试消除mItemView并编写如下函数：

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    if (convertView == null) {
        convertView = mInflater.inflate(R.layout.layout_listview_row, parent, false);
        ViewHolder holder = new ViewHolder();
        //setting up the Views
        convertView.setTag(holder);
    }

    ViewHolder holder = (ViewHolder) convertView.getTag();

    // ...

    return convertView;
}