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{{tag>android}}

====== Sign android apk from terminal ======
This was used for signing an apk built with buildozer and made with kivy.

===== Create certificate =====

  keytool -genkey -v -keystore my-release-key.keystore -alias alias_name -keyalg RSA -keysize 2048 -validity 10000

===== Migrate keystore to PKCS12 =====
Above command will recommend this so do it:

  keytool -importkeystore -srckeystore my-release-key.keystore -destkeystore my-release-key.keystore -deststoretype pkcs12
  
===== Sign the apk =====


  jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore my-release-key.keystore my_application.apk alias_name

===== Zipalign the apk =====
This is required for uploading to the Play Store. It aligns the data in apk to start on 4 byte boundaries for faster memory access and reduced memory consumption.

Install tool

  sudo apt install zipalign

Align

  zipalign -v 4 my_application.apk-signed.apk my_application.apk-signed-aligned.apk

====== Tested on ======
  * Xubuntu 20.04.1
  * Buildozer 1.2.0
  * kivy 2.0.0


====== References ======
  * https://stackoverflow.com/a/17777071/6881647
  * https://developer.android.com/studio/publish/app-signing