pacman -S android-sdk android-sdk-build-tools android-sdk-platform-tools gradle
# edit .zshrc
# export ANDROID_HOME='/opt/android-sdk'
# export PATH=$ANDROID_HOME/tools: $ANDROID_HOME/platform-tools:$PATH
/opt/android-sdk/tools/bin/sdkmanager "platforms;android-26"
/opt/android-sdk/tools/bin/sdkmanager "platforms;android-27"