• Kotlin
• Android Architecture Components (ViewModel, LiveData, Room)
• Dagger2
• Retrofit
• RxJava
• Moshi and Kotshi
• Glide

http://standards.mediarain.com/android/java

Examples..

<color name="white">#FFFFFF</color>
<color name="white_20">#33FFFFFF</color>
<color name="black_50">#80000000</color>
<color name="matterhorn">#555555</color>
<color name="neon_blue">#6447FF</color>

http://www.htmlcsscolor.com/

$ brew update
$ brew install rbenv ruby-build
$ rbenv install -l
$ rbenv install {targetVerion}
$ rbenv global {targetVersion}
$ rbenv exec gem install bundler
$ rbenv exec bundle update