Expose Cached Files

It would be nice to have the ability to see if the image has already been cached to disk and/or memory. A simple call like

Fresco.existsInDiskCache(Uri uri) and Fresco.existsInMemoryCache(Uri uri)

Maybe a separate request but related is the ability to retrieve the cached resource from disk. The use case being that after we have retrieved the image the app may have a feature that allows the user to share the image. If we could access the local uri of the cached image then we can pass it to share intent.

[krmao]

 public static boolean isImageDownloaded(Uri loadUri) {
        if (loadUri == null) {
            return false;
        }
        CacheKey cacheKey = DefaultCacheKeyFactory.getInstance().getEncodedCacheKey(ImageRequest.fromUri(loadUri));
        return ImagePipelineFactory.getInstance().getMainDiskStorageCache().hasKey(cacheKey) || ImagePipelineFactory.getInstance().getSmallImageDiskStorageCache().hasKey(cacheKey);
    }

    //return file or null
    public static File getCachedImageOnDisk(Uri loadUri) {
        File localFile = null;
        if (loadUri != null) {
            CacheKey cacheKey = DefaultCacheKeyFactory.getInstance().getEncodedCacheKey(ImageRequest.fromUri(loadUri));
            if (ImagePipelineFactory.getInstance().getMainDiskStorageCache().hasKey(cacheKey)) {
                BinaryResource resource = ImagePipelineFactory.getInstance().getMainDiskStorageCache().getResource(cacheKey);
                localFile = ((FileBinaryResource) resource).getFile();
            } else if (ImagePipelineFactory.getInstance().getSmallImageDiskStorageCache().hasKey(cacheKey)) {
                BinaryResource resource = ImagePipelineFactory.getInstance().getSmallImageDiskStorageCache().getResource(cacheKey);
                localFile = ((FileBinaryResource) resource).getFile();
            }
        }
        return localFile;
    }

@danhantao

[tyronen]

See http://frescolib.org/docs/caching.html.