How to create native library for apk

hi how do i package the two libraries the armeabi-v7a 32 bits and the 64-bits arm64-v8a in a single apk. I am using version 4.15 follows link from Google the new way to send Apk.
Until August 1, 2019, all apps that use native code will need to offer a 64-bit version, in addition to the 32-bit version, to be able to publish updates.

Hello there!

For your problem, you can refer this link: