/**
* check whether the imageView has it's task.
*
* @param data
* @param imageView
* @return true no task
*/
private static boolean checkImageTask(Object data, ImageView imageView) {
final BitmapLoadAndDisplayTask bitmapWorkerTask = getBitmapTaskFromImageView(imageView);
if (bitmapWorkerTask != null) {
final Object bitmapData = bitmapWorkerTask.data;
if (bitmapData == null || !bitmapData.equals(data)) {
bitmapWorkerTask.cancel(true);
} else {
return false;
}
}
return true;
}
/**
* used for ImageView to download images.
*
* <p>if you use "ViewHolder" and "convertView.getTag()" in listView or gridView, you must use
* this method'.
*
* <p>for image, if you just use bitmap from this method, you don't need to recycle this bitmap.
* if you create a temporary bitmap, you must recycle it by yourself.
*
* @param url
* @param defaultBitmap
* @param imageView
*/
public void download(String url, Bitmap defaultBitmap, ImageView imageView) {
if (null == url || "".equals(url) || "null".equals(url)) {
return;
}
Bitmap bitmap = null;
// bitmap = imageMemoryCache.getBitmapFromSoftCache(url);
// bitmap = memoryCache.get(url);
bitmap = mLruMemoryCache.get(url);
if (bitmap != null) {
// Logger.debug(this,"get image from memory cache, " + bitmap + " from url =" + url);
imageView.setImageBitmap(bitmap);
} else if (checkImageTask(url, imageView)) {
final BitmapLoadAndDisplayTask task = new BitmapLoadAndDisplayTask(imageView);
final AsyncDrawable asyncDrawable =
new AsyncDrawable(mContext.getResources(), defaultBitmap, task);
imageView.setImageDrawable(asyncDrawable);
task.executeOnExecutor(executorService, url);
}
}
