<Download a very big sized image part by part in a...

# stackoverflow

[user]

Download a very big sized image part by part in android
Last week, I have an interview with a company and the interviewer asked me a question that how to download a very big sized image. Then he gave me a solution still I have no idea to implement his solution. His solution can be described like he just need to split the image into some small parts, download each part and combine them after having downloaded. For instance, he would divide the image into part 20x20 and download them.
So how can I implement this idea? Thanks for all supports