異步圖片加載器，只百度到了drawable版，現已改造成bitmap版……需要的同學請拿去
public class AsyncImageLoader {
private HashMap<String, SoftReference<Bitmap>> imageCache;
private Bitmap pc_loading_fali;
public AsyncImageLoader(Bitmap bm) {
imageCache = new HashMap<String, SoftReference<Bitmap>>();
pc_loading_fali=bm;
}
public Bitmap loadBitmap(final String imageUrl, final ImageCallback imageCallback) {
if (imageCache.containsKey(imageUrl)) {
SoftReference<Bitmap> softReference = imageCache.get(imageUrl);
Bitmap bitmap = softReference.get();
if (bitmap != null) {
return bitmap;
}
}
final Handler handler = new Handler() {
public void handleMessage(Message message) {
imageCallback.imageLoaded((Bitmap) message.obj, imageUrl);
}
};
new Thread() {
@Override
public void run() {
Bitmap bitmap = loadImageFromUrl(imageUrl);
imageCache.put(imageUrl, new SoftReference<Bitmap>(bitmap));
Message message = handler.obtainMessage(0, bitmap);
handler.sendMessage(message);
}
}.start();
return pc_loading_fali;
}
public static Bitmap loadImageFromUrl(String url) {
URL m;
InputStream i = null;
try {
m = new URL(url);
i = (InputStream) m.getContent();
} catch (MalformedURLException e1) {
e1.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
Bitmap bmp=BitmapFactory.decodeStream(i);
return bmp;
}
public class ImageCallback { //回調函數，本應該搞成接口的，偷懶搞成了類，使用的時候簡單點。
private ImageView imageView;
public ImageCallback(ImageView iV){
imageView=iV;
}
public void imageLoaded(Bitmap imageBitmap, String imageUrl){
imageView.setImageBitmap(imageBitmap);
}
}
}