GitHub开源:https://github.com/bumptech/glide
超棒的工具,竟然还可以加载.gif !!Glide完全基于Picasso,沿袭了其简洁风格,并在其基础上做了大量优化与改进。
1、Glide默认的Bitmap格式是RGB_565,而Picasso默认ARGB_8888,Glide内存开销要小一半。
2、磁盘存储方面,Picasso只缓存原始图片,而Glide可以根据ImageView大小来缓存相应图片大小,这个改进使Glide速度更快。
3、Glide支持加载.gif动图,Picasso不支持。
总体来说,Glide是在Picasso基础上进行的二次开发,各方面做了不少改进,但也导致Glide的包比较大(<500k),Picasso是100k左右。
一篇两者的比较:http://www.jcodecraeer.com/a/anzhuokaifa/androidkaifa/2015/0327/2650.html
github介绍使用方法:
// For a simple view:
@Override public void onCreate(Bundle savedInstanceState) {
...
ImageView imageView = (ImageView) findViewById(R.id.my_image_view);
Glide.with(this).load("http://goo.gl/gEgYUd").into(imageView);
}
// For a simple image list:
@Override public View getView(int position, View recycled, ViewGroup container) {
final ImageView myImageView;
if (recycled == null) {
myImageView = (ImageView) inflater.inflate(R.layout.my_image_view, container, false);
} else {
myImageView = (ImageView) recycled;
}
String url = myUrls.get(position);
Glide
.with(myFragment)
.load(url)
.centerCrop()
.placeholder(R.drawable.loading_spinner)
.crossFade()
.into(myImageView);
return myImageView;
}
在适配器Adapter的getView()中(比Universal-Image-loader简洁太多啦!):
@Override
public View getView(int position,View convertView,ViewGroup parent){
ViewHolder viewHolder;
View view;
if(convertView == null){
viewHolder = new ViewHolder();
view = LayoutInflater.from(getContext()).inflate(resource, null);
viewHolder.imageView = (ImageView)view.findViewById(R.id.image_item);
view.setTag(viewHolder);
}else{
view = convertView;
viewHolder = (ViewHolder)view.getTag();
}
String imageUrl = Urls.imageUrls[position];
Glide.with(getContext())
.load(imageUrl)
.centerCrop()
.crossFade()
.into(viewHolder.imageView);
return view;
}//.override(int width,int height).placeholder(R.drawable.ic_launcher).error(R.drawable.ic_launcher)
class ViewHolder{
ImageView imageView;
}
Glide.with()
** 总结:可以传入的参数有centerCrop是一种裁剪技术,缩放图像,让它填充到ImageView.
crossFade(),淡入淡出效果
into(),imageView的id.
Urls.java
package sunny.example.helloglidelistview;
public class Urls {
final static String[] imageUrls = new String[]{
"http://img.ui.cn/data/file/8/0/2/666208.gif",
"http://img.ui.cn/data/file/8/3/8/667838.jpg",
"http://img.ui.cn/data/file/9/5/9/654959.jpg",
"http://img.ui.cn/data/file/7/0/3/668307.jpg",
"http://img.ui.cn/data/file/6/0/1/663106.jpg",
"http://img.ui.cn/data/file/6/5/8/664856.jpg",
"http://img.ui.cn/data/file/0/2/2/666220.jpg",
"http://img.ui.cn/data/file/2/5/1/667152.gif",
"http://img.ui.cn/data/file/3/5/1/667153.jpg",
"http://img.ui.cn/data/file/8/3/8/664838.jpg"
};
}
Thanks to http://www.ui.cn/
Item.java
public class Item {
private String imageUrl;
public Item(String imageUrl){
this.imageUrl = imageUrl;
}
}
MainActivity.java
package sunny.example.helloglidelistview;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.widget.ListView;
import java.util.ArrayList;
public class MainActivity extends ActionBarActivity {
private ListView listView;
private ArrayList- arrayList;
private Item item;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView)findViewById(R.id.listView);
arrayList = new ArrayList
- ();
for(int i = 0;i < Urls.imageUrls.length;i++){
item = new Item(Urls.imageUrls[i]);
arrayList.add(item);
}
ItemAdapter adapter = new ItemAdapter(this,R.layout.image_item,arrayList);
listView.setAdapter(adapter);
}
}
完整代码在:https://github.com/HiSunny/HelloGlideListView.git
Thanks to stromzhang