private static RequestQueue newRequestQueue(Context context, ImageCacheParams imageCacheParams) {
Network network =
new BasicNetwork(
Utils.hasHoneycomb()
? new HurlStack()
: new HttpClientStack(
AndroidHttpClient.newInstance(NetUtils.getUserAgent(context))));
Cache cache;
if (null != imageCacheParams) {
cache = new DiskLruBasedCache(imageCacheParams);
} else {
cache = new DiskLruBasedCache(Utils.getDiskCacheDir(context, CACHE_DIR));
}
RequestQueue queue = new RequestQueue(cache, network);
queue.start();
return queue;
}
/**
* Sets a {@link Bitmap} to an {@link ImageView} using a fade-in animation. If there is a {@link
* Drawable} already set on the ImageView then use that as the image to fade from. Otherwise fade
* in from a transparent Drawable.
*/
@TargetApi(Build.VERSION_CODES.HONEYCOMB_MR1)
private static void setImageBitmap(
final ImageView imageView, final Bitmap bitmap, Resources resources, boolean fadeIn) {
// If we're fading in and on HC MR1+
if (fadeIn && Utils.hasHoneycombMR1()) {
// Use ViewPropertyAnimator to run a simple fade in + fade out animation to update the
// ImageView
imageView
.animate()
.scaleY(0.95f)
.scaleX(0.95f)
.alpha(0f)
.setDuration(imageView.getDrawable() == null ? 0 : HALF_FADE_IN_TIME)
.setListener(
new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
imageView.setImageBitmap(bitmap);
imageView
.animate()
.alpha(1f)
.scaleY(1f)
.scaleX(1f)
.setDuration(HALF_FADE_IN_TIME)
.setListener(null);
}
});
} else if (fadeIn) {
// Otherwise use a TransitionDrawable to fade in
Drawable initialDrawable;
if (imageView.getDrawable() != null) {
initialDrawable = imageView.getDrawable();
} else {
initialDrawable = transparentDrawable;
}
BitmapDrawable bitmapDrawable = new BitmapDrawable(resources, bitmap);
// Use TransitionDrawable to fade in
final TransitionDrawable td =
new TransitionDrawable(new Drawable[] {initialDrawable, bitmapDrawable});
imageView.setImageDrawable(td);
td.startTransition(Utils.ANIMATION_FADE_IN_TIME);
} else {
// No fade in, just set bitmap directly
imageView.setImageBitmap(bitmap);
}
}