By default IDE genarate a apk like
Step 1: Go to root of the main project, under app , right click on app and refactor the app into specific name (example iPlanter) and press okay then go to step 2
Step 2: Go to Project Setting file which is setting.gradle file
setting.gradle file contains
Now need to replace app by specific name.
For Example app replace by iPlanter in include ':app' it looks like below
then Sync project, after that run your application. Finally, App generate an apk like iPlanter-debug.apk or iPlanter-release.apk file