update travis

Author: longbai

.travis.yml

@@ -21,15 +21,15 @@ android:
 
  # Specify at least one system image
  # if you need to run emulator(s) during your tests
- - sys-img-armeabi-v7a-android-25
+ - sys-img-x86-google_apis-25
 
  - extra-android-support
  - extra-android-m2repository
 
 # Emulator Management: Create, Start and Wait
 before_script:
  - android list targets
- - echo no | android create avd --force -n test -t android-25
+ - echo no | android create avd --force -n test -t android-25 --abi x86
  - emulator -avd test -no-skin -no-audio -no-window &
  - android-wait-for-emulator
  - adb shell input keyevent 82 &

library/src/main/java/com/qiniu/android/bigdata/Configuration.java

@@ -26,7 +26,7 @@ public Configuration clone() throws CloneNotSupportedException{
  return (Configuration)super.clone();
  }
 
- static Configuration copy(Configuration config){
+ public static Configuration copy(Configuration config){
  if (config == null){
  return new Configuration();
  }