diff --git a/build-notes.md b/build-notes.md
index 2f770c6..5a399ff 100644
--- a/build-notes.md
+++ b/build-notes.md
@@ -18,5 +18,12 @@ sudo apt install openjdk-8-jdk
 ## Gradle
 The latest binary install from https://gradle.org/ which at the time of this document is 5.6.4 works just fine. Unzip into a suitable location and add to your path.
 
-## Android
+## Android SDK command line tools
 
+```bash
+mkdir ~/android-sdk && cd ~/android-sdk
+unzip ~/Downloads/sdk-tools-linux-4333796.zip
+cd ~/android-sdk/tools/bin
+./sdkmanager "build-tools;29.0.2" "platforms;android-28" "platform-tools" "emulator"
+export ANDROID_HOME=~/android-sdk
+```