Why is using fresco datasource to get bitmap empty
Why is bitmap returning onNewResultImpl
null?
final ImageView imageView = (ImageView) findViewById (R.id.imageView);
ImageRequest request = ImageRequest.fromUri(pic_uri);
ImagePipeline imagePipeline = Fresco.getImagePipeline();
DataSource dataSource = imagePipeline.fetchEncodedImage(request, this);
CloseableReference<CloseableImage> imageReference = null;
dataSource.subscribe (new BaseBitmapDataSubscriber() {
@Override
protected void onNewResultImpl(Bitmap bitmap) {
LogUtils._d("onNewResultImpl....");
if(bitmap == null) {
LogUtils._d("bitmap is null");
}
imageView.setImageBitmap(bitmap);
}
@Override
protected void onFailureImpl(DataSource dataSource) {
LogUtils._d("onFailureImpl....");
}
}, CallerThreadExecutor.getInstance());
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I made some changes to make things work in your code, please consider this. I also tested it and it worked great.
// To get image using Fresco
ImageRequest imageRequest = ImageRequestBuilder
.newBuilderWithSource( Uri.parse(getFeedItem(position).feedImageUrl.get(index)))
.setProgressiveRenderingEnabled(true)
.build();
ImagePipeline imagePipeline = Fresco.getImagePipeline();
DataSource<CloseableReference<CloseableImage>> dataSource =
imagePipeline.fetchDecodedImage(imageRequest,mContext);
dataSource.subscribe(new BaseBitmapDataSubscriber() {
@Override
public void onNewResultImpl(@Nullable Bitmap bitmap) {
// You can use the bitmap in only limited ways
// No need to do any cleanup.
}
@Override
public void onFailureImpl(DataSource dataSource) {
// No cleanup required here.
}
}, CallerThreadExecutor.getInstance());
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EDIT: you are using fetchEncodedImage
, not fetchDecodedImage
. This means that each return of the image will not have a base bitmap. But if you change that to fetchDecodedImage
and you still see zero bitmaps, it will be because of what I wrote about below.
See source code here: https://github.com/facebook/fresco/blob/master/imagepipeline/src/main/java/com/facebook/imagepipeline/datasource/BaseBitmapDataSubscriber.java#L57-L61
Not all images that are returned are CloseableBitmap
s, and those that do not have a base bitmap to return, so this method returns a zero bitmap.
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