（Android图片内存优化）Picasso加载图片 教程。。详细版

Picasso 是 Android 上一个强大的图片下载和缓存库。

示例代码：

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Picasso.with(context).load( "http://i.imgur.com/DvpvklR.png" ).into(imageView);
@Override public void getView( int position, View convertView, ViewGroup parent) {
SquaredImageView view = (SquaredImageView) convertView;
if (view == null ) {
view = new SquaredImageView(context);
}
String url = getItem(position);
Picasso.with(context).load(url).into(view);
}
//图像处理
Picasso.with(context)
.load(url)
.resize( 50 , 50 )
.centerCrop()
.into(imageView)