How can i generate the APK file

hi guys im stuck with How can i generate the APK file. i want to get the final APK file so as to apload it to google play store. Would you mind sharing with me how i can do it ??

 

https://www.buildbox.com/guides/

 

thanks i really appreciate the help

 

here is a video search in the forum there is many more
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Thanks bro