Placeholder is displayed in RecyclerView, but after refresh the image is shown

[qinjuning]

I use the RecyclerView and Glide(thanks u very much :) ) in my app , but i find a problem that RecyclerView's item sometimes display the placeholder image res first time , but when i refresh again , it can display the right image from url . The code like this :
Glide.with(BaseApplication.getInstance()).load(imageUrl) .centerCrop() .placeholder(R.drawable.XXX) .crossFade() .into(imageView);

when i remove the placeholder method, it can display the image well .

Bye the way, i use the https://github.com/StanKocken/EfficientAdapter to use the ViewHolder of RecyclerView

i cannot find any way to resolve this problem, can you help me ?

[TWiStErRob]

I don't see what the problem is, please try to rephrase it. (Did you miss a "not" somewhere?)

What you describe seems like the default behaviour: at first the image loading takes time (downloading and/or decoding from disk cache), next time it may be in memory cache which means there'll be now I/O in this case it's pointless to delay showing what we already have by displaying a placeholder again.

[qinjuning]

Thanks for you answer . I am sorry because of my English is poor.

I mean the ImageView always display the placeholder until i manually scroll or refresh the RecyclerView again. I seems it cannot load the real image when its done . It spent enough time to observer this phenomenon.

Maybe the follows image can tell me what i said:

1. The i mageView always show the placeholder at first time

   

2 .After 10 minutes, i refresh the RecyclerView again, it can display the real image well

[TWiStErRob]

Showing the placeholder usually means there was an error during loading. Take a look at RequestListener and check what Exception is thrown. I would imagine a timeout maybe.

[qinjuning]

I add the RequestListener to observer the callback, it invoke the onResourceReady method. Log is

  onResourceReady  model 

Code is

  Glide.with(BaseApplication.getInstance()).load(imageUrl)
                .placeholder(defaultPlaceHolder)
                .listener(new RequestListener<String, GlideDrawable>() {
                    @Override
                    public boolean onException(Exception e, String model, Target<GlideDrawable> target, boolean isFirstResource) {

                        Logger.d("onException %s  model %s" , e, model );

                        return false;
                    }

                    @Override
                    public boolean onResourceReady(GlideDrawable resource, String model, Target<GlideDrawable> target, boolean isFromMemoryCache, boolean isFirstResource) {
                        Logger.d("onResourceReady  model %s", model );
                        return false;
                    }
                })
                .into(imageView);

So I don't think the cause is that there was an error during loading. Like I said before, "It seems it cannot load the real image when its done at first time".

Then I use the Picasso to do the same thing , it works well .

 Picasso.with(BaseApplication.getInstance())
                .load(imageUrl)
                .placeholder(defaultPlaceHolder)
                .into(imageView);

[qinjuning]

Finally , I find out that the problem is occurred when I used CircleImageView .

At first, we set the placeholder to ImageView, then we set the “real image” but the placeholder had the same size with the real image , so the ImageView don't auto invalidate().

The difference is

 GlideDrawable extends Drawable

 PicassoDrawable  extends BitmapDrawable

But CircleImageView only support BitmapDrawable and ColorDrawable ,its not well .

private Bitmap getBitmapFromDrawable(Drawable drawable) {
        if(drawable == null) {
            return null;
        } else if(drawable instanceof BitmapDrawable) {
            return ((BitmapDrawable)drawable).getBitmap();
        } else {
            try {
                Bitmap e;
                if(drawable instanceof ColorDrawable) {
                    e = Bitmap.createBitmap(2, 2, BITMAP_CONFIG);
                } else {
                    e = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), BITMAP_CONFIG);
                }

                Canvas canvas = new Canvas(e);
                drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
                drawable.draw(canvas);
                return e;
            } catch (OutOfMemoryError var4) {
                return null;
            }
        }
    }

The simple way to fix is add the asBitmap() or other way to modify the CircleImageView or GlidDrawable

Thank u very much.

[TWiStErRob]

Ah, the magic "Circle view" :) Sorry for not noticing earlier. Here's a nice list. We dug deep and found the core of the problem: #482 (comment) (scroll down a little, the images may make the URL anchor displaced, it's the last long comment by me)

You have two options:

• use CircleTransform instead of custom ImageView
• add .dontAnimate()

While disabling the animation seems easier, you may have more luck with the transformation in the long run.

[Bertkiing]

THX U very much!

[AmrAbuelhamd]

Thank you guys very much