How to sign Android App on another computer

Question

I'm using Flutter and I have an old Mac Mini that works fine but then Apple introduced a Signin with Apple and you can't build it on old version of Xcode, so I had to do it on my Macbook Air which I barely use to build apps because I feel more comfortable on desktop machine.

Now when I update something I had to push it on Github, then update the project and build the bundle on the Mac mini, because there's the cert I used to sign the App.

The problems is that I want to sell the Mac mini and I have a potential buyer but I don't know how to import the .jks in the Macbook Air. I tried simply copying it but it doesn't work. Can anyone help me with this, please?

Answer 1

1. Get the .jks you used to sign the android package
2. Copy it to your /android directory of your flutter project
3. Create key.properties file in the /android directory and insert the content as below :

storePassword=jks_password
keyPassword=key_password
keyAlias=key_alias_name
storeFile=../jks_file.jks

4. Now run flutter command to generate apk or appbundle by below code

flutter build apk or flutter build appbundle