nicoatridge
Kotlin and Android Development: Could not get unknown property ‘kotlin_version’…
Hi, I have just acquired Michael Fazio’s “Kotlin and Android Development” to learn about game programming for Android. I have a game in python, js, and - in a basic, command line form - in kotlin and want to port it to Android (web version at https://basilisk.net). Anyway, got to page 8 and was editting the build.graddle file and found that the line
implementation “org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version”
threw up an error “Could not get unknown property ‘kotlin_version’…”
the line jvmTarget = ‘1.8’ was already in the build.graddle file but the dependencies identified were not. Editting out the problematic kotlin_version line and the program runs fine, but I don’t want to waste my time if this is something that causes more problems downstream.
I am on Arctic Fox 2020.3.1 Patch 1.
Marked As Solved
mfazio23
Hey Nic! This is a known issue when using newer versions of Android Studio. They used to add the $kotlin_version variable for you when creating a new project, but no longer.
If you open the project’s build.gradle file (not the app’s file of the same name), you can add an ext block to the buildscript block to include that variable:
buildscript { ext { kotlin_version = '1.4.10' gradle_version = '4.1.0' } // The rest of the buildscript lives down here. } Let me know if this helps!
Popular Pragmatic Bookshelf topics 
Other popular topics
Categories:
Sub Categories:
Popular Portals
- /elixir
- /rust
- /ruby
- /wasm
- /erlang
- /phoenix
- /keyboards
- /rails
- /python
- /js
- /security
- /go
- /swift
- /vim
- /clojure
- /emacs
- /haskell
- /java
- /onivim
- /typescript
- /svelte
- /c-plus-plus
- /crystal
- /kotlin
- /tailwind
- /react
- /gleam
- /ocaml
- /elm
- /flutter
- /vscode
- /ash
- /opensuse
- /html
- /centos
- /php
- /deepseek
- /zig
- /scala
- /textmate
- /sublime-text
- /lisp
- /nixos
- /debian
- /react-native
- /agda
- /kubuntu
- /arch-linux
- /django
- /revery
- /ubuntu
- /manjaro
- /spring
- /nodejs
- /diversity
- /lua
- /deno
- /julia
- /c
- /slackware
Devtalk Sponsors
Practical resources that improve the lives of professional developers.
We build trusted fault-tolerant systems that scale to billions of users.
Real-time error tracking, performance insights, and observability for devs.
Develop your skills with books, videos, and courses.
Catch errors, track performance, monitor hosts and more.
Enabling companies to succeed by building software people love.
Courses that move you from confusion to "Aha, now I get it!"