Fresco 获取本地缓存图片的文件

// Fresco 判断文件是否已经被缓存 

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);
    }

// Fresco 获取本地缓存图片的文件
    //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;
    }