<NME> .travis.yml
<BEF> language: android
jdk: oraclejdk8
env:
  global:
    - ANDROID_TARGET=android-21
    - ANDROID_ABI=armeabi-v7a
    # - tools

    # The BuildTools version used by your project
    - build-tools-23.0.1

    # The SDK version used to compile your project
    - android-23
    # The BuildTools version used by your project
    - build-tools-25.0.3
    # The SDK version used to compile your project
    - android-25

    # Additional components
    - extra-google-google_play_services
    - extra-google-m2repository
    - extra-android-m2repository
    - addon-google_apis-google-25

    # Specify at least one system image,
    # if you need to run emulator(s) during your tests
    - sys-img-${ANDROID_ABI}-${ANDROID_TARGET}

#  licenses:
#    - android-sdk-license-.+
#    - android-sdk-license-c81a61d9

notifications:
  email: false

    # Emulator Management: Create, Start and Wait
before_script:
    - echo "y" | android update sdk --no-ui
    - echo no | android create avd --force -n test -t $ANDROID_TARGET --abi $ANDROID_ABI
    - emulator -avd test -no-skin -no-audio -no-window &
    - android-wait-for-emulator
    - adb shell input keyevent 82 &

<MSG> upgrade to latest build-tool version

<DFF> @@ -7,7 +7,7 @@ android:
     # - tools
 
     # The BuildTools version used by your project
-    - build-tools-23.0.1
+    - build-tools-23.0.2
 
     # The SDK version used to compile your project
     - android-23

upgrade to latest build-tool version