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我一直在寻找一种方式来做一个单独的线程毕加索,因为它是从互联网上加载它。我不知道如何确认。Picasso Image加载到多线程?
我的应用程序基本上是一个ListView与一个imageView和两个textViews,我创建了一个CustomAdapter,它扩展了BaseAdapter以协助列表。这是我在我的适配器类都做:
public class CustomAdapter extends BaseAdapter
{
public String title[];
public String description[];
public String images[]; //Image URLs
private static Picasso instance;
public Activity context;
public LayoutInflater inflater;
public CustomAdapter(Activity context, String[] title, String[] description, String[] images) {
super();
this.context = context;
this.title = title;
this.description = description;
this.images = images;
this.inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return title.length;
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return null;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
public static Picasso getSharedInstance(Context context)
{
if(instance == null)
{
instance = new Picasso.Builder(context).executor(Executors.newSingleThreadExecutor()).memoryCache(Cache.NONE).indicatorsEnabled(true).build();
return instance;
}
else
{
return instance;
}
}
public static class ViewHolder
{
ImageView icon;
TextView itemNameTextView;
TextView itemDescriptionTextView;
}
@Override
public View getView(int position, View view, ViewGroup parent) {
// TODO Auto-generated method stub
Debug.startMethodTracing("ThreadCheck");
ViewHolder holder;
if(view==null)
{
holder = new ViewHolder();
view = inflater.inflate(R.layout.list_item, null);
holder.icon = (ImageView) view.findViewById(R.id.DownloadedImage);
holder.itemNameTextView = (TextView) view.findViewById(R.id.ItemNameTextView);
holder.itemDescriptionTextView = (TextView) view.findViewById(R.id.ItemDescriptionTextView);
view.setTag(holder);
}
else
holder=(ViewHolder)view.getTag();
Picasso.with(context).load(images[position]).into(holder.icon);
holder.itemNameTextView.setText(title[position]);
holder.itemDescriptionTextView.setText(description[position]);
return view;
}
}
我想知道的是什么:
1)执行以下操作使毕加索在一个单独的线程加载图像? (我读这个地方并没有真正意义的我,我希望你们会向我解释。)
instance = new Picasso.Builder(context).executor(Executors.newSingleThreadExecutor()).memoryCache(Cache.NONE).indicatorsEnabled(true).build();
2)或根本
Picasso.with(context).load(images[position]).into(holder.icon);
自动完成它在一个新的线程?
3)或者,这些都不是在一个新的线程中,我需要单独做它?如果是,那又如何?
在此先感谢!
'Picasso'在默认情况下在后台线程中从Internet下载图像。你想确认什么? –
是的,它使用分离的线程,而不是用于图像加载的UI线程。 – anhtuannd
毕加索在后台线程下载,使用默认上下文并使用构建器...您永远不会得到NetworkOnMainThreadException .. – Kushan