Forgot to paste my code:-
class IconicAdapter extends ArrayAdapter {
Activity context;
Context context2;
HashMap<String,String> ret = new HashMap<String,String>();
AsyncLoader async;// = new AsyncLoader();
private ListView listView;
HashMap<String,Bitmap> bit = new HashMap<String,Bitmap>();
IconicAdapter(Activity context) {
super(context, R.layout.exclusive, items);
this.context=context;
async = new AsyncLoader();
}
public View getView(final int position, View convertView,
ViewGroup parent) {
View row_inflated = View.inflate(context, R.layout.exclusive,null);
wrapper = new ViewWrapper(row_inflated);
row_inflated.setTag(wrapper);
wrapper.getSongName().setText(items[position]);
wrapper.getSingerName().setText(singer_name[position]);
final ImageView imgview = wrapper.getIcon();
imgview.setTag(myRemoteImages[position]);
Bitmap cachedImage = async.loadDrawable(myRemoteImages[position], new
ImageCallback() {
public void imageLoaded(Bitmap imageBitmap, String imageUrl) {
imgview.setImageBitmap(imageBitmap);
notifyDataSetChanged();
}
});
if(cachedImage!=null)
imgview.setImageBitmap(cachedImage);
return(row_inflated);
}
}
======================================================================
AsynLoader is as below:-
public class AsyncLoader{
HashMap<String,Bitmap> bit = new HashMap<String,Bitmap>();
private HashMap<String, SoftReference<Bitmap>> imageCache;
private HashMap<String, SoftReference<Bitmap>> drawableMap;
public AsyncLoader() {
drawableMap = new HashMap<String, SoftReference<Bitmap>>();
imageCache = new HashMap<String, SoftReference<Bitmap>>();
}
public Bitmap loadDrawable(final String imageUrl, final ImageCallback
imageCallback) {
if (drawableMap.containsKey(imageUrl)) {
SoftReference<Bitmap> softReference = imageCache.get(imageUrl);
Bitmap drawable = softReference.get();
if (drawable != null) {
return drawable;
}
}
final Handler handler = new Handler() {
@Override
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 null;
}
public static Bitmap loadImageFromUrl(String url){
URL aURL;
Bitmap bitmap=null;//=this.bm;
try {
aURL = new URL(url);
URLConnection conn;
conn = aURL.openConnection();
conn.connect();
InputStream is= conn.getInputStream();
BufferedInputStream bis = new BufferedInputStream(is);
bitmap = BitmapFactory.decodeStream(bis);
// bitMap.put(p,bm);
bis.close();
is.close();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return bitmap;
}
public interface ImageCallback {
public void imageLoaded(Bitmap imageBitmap, String imageUrl);
}
}
Thanks,
Prajakta
On Sat, Apr 10, 2010 at 10:21 AM, praj <[email protected]> wrote:
> Hi,
>
> I was trying to implement the lazy loading of images in the list view.
> For implementing this i was referring to post by Tom van Zummeren.
> (http://blog.jteam.nl/2009/09/17/exploring-the-world-of-android-
> part-2/), but my images keep on changing in the list. Please can
> anyone let me know if they were able to get this working properly
> without having the images drawn again and again or let me know if I
> have missed on anything or doing something wrong.
>
> Thanks,
> Prajakta
>
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