Android从网络获取图片并设置缓存

public class AndroidLoadImageFromURLActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

// Loader image - will be shown before loading image
int loader = R.drawable.loader;

// Imageview to show
ImageView image = (ImageView) findViewById(R.id.image);

// Image url
String image_url = "http://10.0.2.2/biyeshejidata/www.png";

// ImageLoader class instance
ImageLoader imgLoader = new ImageLoader(getApplicationContext());

// whenever you want to load an image from url
// call DisplayImage function
// url - image url to load
// loader - loader image, will be displayed before getting image
// image - ImageView
imgLoader.DisplayImage(image_url, loader, image);
}
}

public class Utils {
public static void CopyStream(InputStream is, OutputStream os)
{
final int buffer_size=1024;
try
{
byte[] bytes=new byte[buffer_size];
for(;;)
{
int count=is.read(bytes, 0, buffer_size);
if(count==-1)
break;
os.write(bytes, 0, count);
}
}
catch(Exception ex){}
}
}