update travis

Author: geminiwen

.travis.yml

@@ -7,7 +7,7 @@ android:
      - tools
 
     # The BuildTools version used by your project
-    - build-tools-20
+    - build-tools-22.0.1
 
     # The SDK version used to compile your project
     - android-22
@@ -21,4 +21,11 @@ android:
     # if you need to run emulator(s) during your tests
     - sys-img-armeabi-v7a-android-19
     - sys-img-x86-android-17
+
+before_script:  
+    - echo no | android create avd --force -n test -t android-17 --abi armeabi-v7a
+    - emulator -avd test -no-skin -no-audio -no-window &
+    - android-wait-for-emulator
+    - adb shell input keyevent 82 &
+
 script: ./gradlew build connectedCheck