Recyclerview Adapter 和 Glide - 每 4-5 行相同的图像 [英] Recyclerview Adapter and Glide - same image every 4-5 rows

问题描述

我有这个问题 - 只是为了测试目的，我将 ParseFile 添加到接收列表中的 ParseObject 之一.它不是仅在该行中显示，而是每 4-5 行显示一次，有时更多，有时更少.我怀疑回收观点与此有关.奇怪的是，其他数据(从本例中删除)与 position 变量一起工作正常.

I have this problem - just for testing purposes I added ParseFile to one of ParseObject from received list. Instead of showing it only in that row it shows every 4-5 rows, sometimes more, sometimes less. I supspect that recycling view have something to do with this. Strangely, other data (deleted from this example) works fine with position variable.

@Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        if(parseList.get(position).get("logo") != null){
            ParseFile image = (ParseFile) parseList.get(position).get("logo");
            String url = image.getUrl();
            Glide.with(context)
                    .load(url)
                    .placeholder(R.drawable.piwo_48)
                    .transform(new CircleTransform(context))
                    .into(holder.imageView);


        }

    }

推荐答案

这里的答案是不正确的，尽管它们在正确的轨道上.

The answers here are incorrect, although they're on the right track.

你需要调用Glide#clear()，而不是仅仅将图像drawable设置为null.如果不调用 clear()，异步加载无序完成仍可能导致视图回收问题.您的代码应如下所示:

You need to call Glide#clear(), not just set the image drawable to null. If you don't call clear(), an async load completing out of order may still cause view recycling issues. Your code should look like this:

@Override 
public void onBindViewHolder(ViewHolder holder, int position) {
    if (parseList.get(position).get("logo") != null) {
        ParseFile image = (ParseFile) parseList.get(position).get("logo");
        String url = image.getUrl();
        Glide.with(context) 
                .load(url)
                .placeholder(R.drawable.piwo_48)
                .transform(new CircleTransform(context)) 
                .into(holder.imageView);
    } else {
        // make sure Glide doesn't load anything into this view until told otherwise
        Glide.with(context).clear(holder.imageView);
        // remove the placeholder (optional); read comments below
        holder.imageView.setImageDrawable(null);
    }
} 

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