language: android

android:
  components:
    # The BuildTools version used by your project
    - build-tools-23.0.2

    # The SDK version used to compile your project
    - android-23

before_cache:
  - rm -f $HOME/.gradle/caches/modules-2/modules-2.lock
cache:
  directories:
    - $HOME/.gradle/caches/
    - $HOME/.gradle/wrapper/

jdk:
  - oraclejdk8

language: android

android:
  components:
    # The BuildTools version used by your project
    - build-tools-23.0.2

    # The SDK version used to compile your project
    - android-23
    
    # For AppCompat
    - extra

before_cache:
  - rm -f $HOME/.gradle/caches/modules-2/modules-2.lock
cache:
  directories:
    - $HOME/.gradle/caches/
    - $HOME/.gradle/wrapper/

jdk:
  - oraclejdk8

Add "extra" Android component for AppCompat lib
Add "extra" Android component for AppCompat lib