毕加索运作不正常 [英] Picasso not functioning consistently
问题描述
我有一个gridview，其中有很多图块-几百个.所有数据都是从Web服务收集的.
I have a gridview which has lots of tiles - something like several hundreds. All the data is gathered from a webservice.
每个网格单元都有两个TextView，一个Button和一个ImageView.
Each gridcell has two TextViews, a Button and one ImageView.
我绝对无法使用我编写的原始代码来加载图像，该应用每次给出OOM都会崩溃每次，因此我决定使用Picasso.顺便说一下，我的asynctasks运作良好.
I was absolutely unable to load images using raw code written by me, the app would crash every single time giving OOM, so I decided to use Picasso. My asynctasks, by the way, are working perfectly.
我必须说，实现不仅更简单，而且我的应用程序甚至没有崩溃过一次.
I must say, the implementation is not only simpler, but my app hasnt crashed even once.
但是，毕加索什么时候显示图像，什么时候对我来说似乎不是完全随机-
However, when Picasso will display images and when it won't seems to be completely random to me -
-
有时，要花一些时间才能显示当前正在查看的单元格中的图像(按年龄，我指的是30-40秒).
Sometimes, it would take ages to show the images in the cells currently in view (by ages I mean 30-40 secs).
在其他情况下，将立即加载2-3张图像，然后再加载其他图像.我向下滚动并看到10到20个单元格的间隙后会看到一些图像.然后是另一个差距.然后是一些图片.
At other instances, 2-3 images would load instantly and then no other will. I scroll down and see some images after a gap of 10-20 cells. Then another gap. Then some images.
我可以看到它正在缓存图像，但是显然存在一些问题.当我滚动回到我曾经去过的地方时，似乎重新加载"了图像.
I can see it is caching the images, but clearly there is some problem. It seems to "reload" the images when I scroll back to some place where I have already been.
一旦我重新启动仿真器，一切都将正常运行. 完美无瑕.下次不一样.下次我重新启动模拟器时，情况并非如此.
Once I re-started the emulator and everything worked flawlessly. Flawlessly. Not so the next time. And not so the next time I re-started the emulator.
我不会说毕加索是不可靠的，因为更多的机会是我以其他方式弄乱了我的内存管理.但是，如果有的话，我将无法指出.
I won't go so far as to say Picasso is not dependable, for more chances are that I have messed up my memory management in some other way. However, if I have I am unable to point it out.
这是我的适配器类-
package com.tech4i.hujum;
// all imports
@SuppressLint("NewApi")
public class DealsAdapter extends BaseAdapter {
private Context mContext;
int width;
public static List<Deals> deals_list;
Deals deal;
DealsViewHolder dvh;
AbsListView.LayoutParams layoutParams;
LayoutInflater inflater = null;
public DealsAdapter(Context context, List<Deals> objects) {
mContext = context;
deals_list = objects;
inflater = (LayoutInflater) mContext
.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
}
// ViewHolder
class DealsViewHolder {
ImageView pic;
TextView details;
TextView price;
Button button;
}
@SuppressLint("ViewHolder")
@Override
public View getView(int position, View convertView, ViewGroup parent) {
width = (int) ((MainActivity.width * 0.23 * mContext.getResources()
.getDisplayMetrics().density) + 0.5);
layoutParams = new AbsListView.LayoutParams(width, (int) (width * 0.95));
if (convertView == null) {
convertView = inflater.inflate(R.layout.gridcell_deals, parent,
false);
convertView.setLayoutParams(layoutParams);
dvh = new DealsViewHolder();
dvh.details = (TextView) convertView
.findViewById(R.id.deal_details);
dvh.price = (TextView) convertView.findViewById(R.id.deal_price);
dvh.pic = (ImageView) convertView.findViewById(R.id.deal_picture);
dvh.button = (Button) convertView
.findViewById(R.id.deal_shop_now_button);
convertView.setTag(dvh);
} else {
dvh = (DealsViewHolder) convertView.getTag();
}
deal = deals_list.get(position);
Picasso.with(dvh.pic.getContext()).load(deal.getPhoto_link()).noFade()
.into(dvh.pic);
dvh.details.setText(deal.getDescription());
dvh.price.setText(deal.getValue() + " /-");
return convertView;
}
}
任何帮助将不胜感激.谢谢！
Any help will be appreciated. Thanks!
推荐答案
您尝试加载的图像似乎很大.因此，您可以尝试将尺寸调整添加到Picasso方法链中:
It seems that images you try to load are huge. So you may try to add resizing to Picasso methods chain:
Picasso.with(dvh.pic.getContext())
.load(deal.getPhoto_link())
.noFade()
.resize(width, height) // <-- ImageView size in cell
.into(dvh.pic);
它将减少内存消耗.另外，如果您的API允许您获取缩略图而不是完整版本的图像，则最好在网格视图中下载它们.
It will reduce memory consumption. Also if your API allows you to obtain thumbnails instead of full version of images it will preferable to download them in grid view.
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