Zip(Jar,Apk) file by file Diff & Patch C++ library, create minimal differential, support apk v2 sign & Jar sign(apk v1).
( not support zip64, and only support decode Deflated code; dependent libraries HDiffPatch, zlib, lzma. )
[中文说明]
usage:
-
ZipDiff(oldZip,newZip,out diffData)
release the diffData for update oldZip;
your apk use v2 sign(or need ZipPatch result byte by byte equal)?Released newZip:= AndroidSDK#apksigner(ApkNormalized(newZip)) before ZipDiff, AND You should not modify the zlib version (unless it is certified compatible). -
ZipPatch(oldZip,diffData,out newZip)
ok , get the newZip;
ZipPatch() requires 4*(decompress stream memory) +ref old decompressmemory + O(1), alsoref old decompresscan use temp disk file without memory.
- Why need ApkDiffPatch after have BsDiff or HDiffPatch ?
ApkDiffPatch: v1.0
BsDiff: v4.3
HDiffPatch: v2.2.6
Google Play patches: https://github.com/andrewhayden/archive-patcher v1.0
(test by https://github.com/googlesamples/apk-patch-size-estimator )
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BsDiff HDiffPatch archive-patcher ApkDiffPatch
oldVersion newVersion newSize (bzip2) (+zlib) (+gzip) (+zlib) (+lzma)
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chrome-63-0-3239-111.apk chrome-64-0-3282-123.apk 43879588 32916357 32621974 18776996 15995242 13896562
chrome-64-0-3282-123.apk chrome-64-0-3282-137.apk 43879588 28895294 28538751 1357320 1341073 1149331
chrome-64-0-3282-137.apk chrome-65-0-3325-109.apk 43592997 31771385 31540550 16427116 14415021 12356765
google-maps-9-70-0.apk google-maps-9-71-0.apk 50568872 37992141 37531799 17293163 14562607 11430622
google-maps-9-71-0.apk google-maps-9-72-0.apk 54342938 41897706 41475595 21301751 18752320 14066134
weixin660android1200.apk weixin661android1220.apk 61301316 17565557 17372003 1927833 1794219 1659286
weixin661android1220.apk weixin662android1240.apk 63595334 38349926 38025483 22100454 18392769 15556315
weixin662android1240.apk weixin663android1260.apk 63595326 11614415 11531258 1044656 937920 940060
weixin663android1260.apk weixin665android1280.apk 63669882 21423459 21176790 9621032 9003472 7392063
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Average Compression 100.0% 56.3% 55.8% 23.5% 20.4% 16.8%
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