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prevent the same url and imageview being fetched many times at the same time #9

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prevent the same url and imageview being fetched many times at the same time #9

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7712df4
prevent the same url and imageview being fetched many times at the sa…
asfman Mar 27, 2012
55facda
prevent the same url and imageview being fetched many times at the sa…
asfman Mar 27, 2012
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10 changes: 9 additions & 1 deletion src/com/fedorvlasov/lazylist/ImageLoader.java
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Original file line number Diff line number Diff line change
Expand Up @@ -33,7 +33,8 @@ public ImageLoader(Context context){

final int stub_id=R.drawable.stub;
public void DisplayImage(String url, ImageView imageView)
{
{ //prevent the same url and imageview being fetched many times at the same time

imageViews.put(imageView, url);
Bitmap bitmap=memoryCache.get(url);
if(bitmap!=null)
Expand Down Expand Up @@ -119,6 +120,8 @@ public PhotoToLoad(String u, ImageView i){
}
}

private Map<Long, Boolean> RunningTask = Collections
.synchronizedMap(new WeakHashMap<Long, Boolean>());
class PhotosLoader implements Runnable {
PhotoToLoad photoToLoad;
PhotosLoader(PhotoToLoad photoToLoad){
Expand All @@ -129,7 +132,12 @@ class PhotosLoader implements Runnable {
public void run() {
if(imageViewReused(photoToLoad))
return;
long key = (long) photoToLoad.imageView.hashCode() + photoToLoad.url.hashCode();
Boolean isRunning = RunningTask.get(key);
if(isRunning != null && isRunning.equals(true)) return;
RunningTask.put(key, true);
Bitmap bmp=getBitmap(photoToLoad.url);
RunningTask.remove(key);
memoryCache.put(photoToLoad.url, bmp);
if(imageViewReused(photoToLoad))
return;
Expand Down