How to download the zip file from the server and unzip to sd card .

There is an address, such as http://ftp.abc.com/dfs/aaa.zip
How do I download from this address above zip file and unzip to sd card inside ? Looks and xml, download pictures are not the same .
request code , be grateful.
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no code , oh,

looks first in the server decompression,

after decompression is xml, image files

then one xml pictures, download slightly
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java can handle zip with related classes
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download the zip download with no distinction between ordinary files , downloads down, with java.util.zip. * related operations, or if you find a java -extracting zip google class can be called directly .
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I would like to ask you to solve the problem yet ?