android - what's different between package-archive and package-delta for apk file from google play -

android - what's different between package-archive and package-delta for apk file from google play -

download several apks google play, of them content type == "archive", of them used "delta", saw hex both not same, can give detail info regarding what's different?

mimetype="application/vnd.android.package-archive" content-type: application/vnd.android.package-delta

thanks

i think application/vnd.android.package-delta gzcompressed.

if download apk content type = "application/vnd.android.package-delta" it's size smaller compared 1 content type = "application/vnd.android.package-archive".

like whatsapp file size 9.4mb , 14.7mb.

yes download links different.

the 1 returns the delta @ end has "apk_gz" in it's link that's why think it's gzcompressed.

--edit-- theo pointed out changes in apk file. can read here.

android protocols