我想构建一个使用毕加索库在gridview中显示图像的应用程序.图像由远程服务器检索.我应该创建一个AsyncTask类,还是由Picasso Library本身处理这个类？到目前为止我看过的所有毕加索教程看起来都有些模糊.
谢谢,
西奥.
解决方法
使用picasso lib在gridview中加载图像非常简单,as demonstrated here,
class SampleGridViewAdapter extends BaseAdapter {
private final Context context;
private final List<String> urls = new ArrayList<String>();
public SampleGridViewAdapter(Context context) {
this.context = context;
// Ensure we get a different ordering of images on each run.
Collections.addAll(urls,Data.URLS);
Collections.shuffle(urls);
// Triple up the list.
ArrayList<String> copy = new ArrayList<String>(urls);
urls.addAll(copy);
urls.addAll(copy);
}
@Override public View getView(int position,View convertView,ViewGroup parent) {
SquaredImageView view = (SquaredImageView) convertView;
if (view == null) {
view = new SquaredImageView(context);
view.setScaleType(CENTER_CROP);
}
// Get the image URL for the current position.
String url = getItem(position);
// Trigger the download of the URL asynchronously into the image view.
Picasso.with(context) //
.load(url) //
.placeholder(R.drawable.placeholder) //
.error(R.drawable.error) //
.fit() //
.tag(context) //
.into(view);
return view;
}
@Override public int getCount() {
return urls.size();
}
@Override public String getItem(int position) {
return urls.get(position);
}
@Override public long getItemId(int position) {
return position;
}
}
