android - 图库中的图像缓存

Question

可以将图像保存在应用程序缓存中，并将这些相同的图像用于图库。这些图像必须从互联网上下载。能给我解释一下怎么做吗？

Answer 1

Yes you can,,

Use NetworkImageService which will fetch image remotly from server.

class NetworkImageService {

public Image getImage(name) { ... }

}

Just make another subclass.

 class CachedNetworkImageService extends NetworkImageService {

Cache cache = new Cache();

public Image getImage(name) { ... 
      Image img = cache.get(name);
      if( img == null ) {
             img = super.getImage(name);
             cache.put( name, img );
      }
      return img.
}
}

Read about Hashmap. It will work...

Answer 2

我会为此使用 LruCache。在这里阅读文档。