Getting bitmapdrawable from fresco

Question

I'm trying to get the bitmap that from SimpleDraweeView.

I already setted my SimpleDraweeView with uri image:

final Uri uri = new Uri.Builder()
                    .scheme(UriUtil.LOCAL_RESOURCE_SCHEME)
                    .path(returnUri.getPath())
                    .build();
            profileImage.setImageURI(returnUri);

And now I'm trying to save the image in the memory (storage) of the phone.

 Bitmap b = ((BitmapDrawable) profileImage.getDrawable()).getBitmap(); //  ImageDiskHelper.drawableToBitmap(profileImage.getDrawable().get);
        try {
            ImageDiskHelper.saveToInternalStorage(b, "MyActualProfileImage");
        } catch(Exception c){ }

But If I use the code above I get : com.facebook.drawee.generic.RootDrawable cannot be cast to android.graphics.drawable.BitmapDrawable

I convert profileImage.getDrawable to bitmap the image is like this: empty image

I'm trying to get the bitmap which is being displayed by the SimpleDraweeView

Why exactly do you want to do this? Fresco already manages all the caching etc. for you. — Alexander Oprisnik, Aug 04 '16 at 08:59
@AlexanderOprisnik A good reason I can think of is for UI testing it's useful to have access to a bitmap drawable, but to do that we need to start with a regular drawable it seems, and I don't know how to cast that — Nick Cardoso, Aug 09 '16 at 10:24
Because I want to the user see some image then save it into storage — Dex Sebas, Aug 10 '16 at 00:35

Alexander Oprisnik · Answer 1 · 2016-08-10T11:39:52.220

Getting the bitmap drawable is not a good idea since the underlying implementation of Fresco could change in the future, which would break your code.

I guess you really just want the raw encoded image bytes (so that you don't have to re-encode the image). You can get the encoded image bytes with

DataSource<CloseableReference<PooledByteBuffer>> dataSource = imagePipeline.fetchEncodedImage(imageRequest, callerContext);

Since you already fetched the image before, it should be available instantly and you can do something like

try {
  CloseableReference<PooledByteBuffer> encodedImage = dataSource.getResult();
  if (imageReference != null) {
    try {
      // Do something with the encoded image, but do not keep the reference to it!
      // The image may get recycled as soon as the reference gets closed below.
    } finally {
      CloseableReference.closeSafely(encodedImage);
    }
  } else {
    // cache miss
    ...
  }
} finally {
  dataSource.close();
}

Don't forget to close the references so that you don't leak memory. You can find more information here.

score 1 · Answer 2 · answered Jun 22 '17 at 10:38

I think it can be help you.

SimpleDraweeView view = findView(R.id.pic);
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap bitmap = view.getDrawingCache();
if (bitmap != null) {
    dominantColor = getDominantColor(bitmap);
}

Maybe it's not beautiful solution, but working well for me.

Getting bitmapdrawable from fresco

2 Answers2

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