16-01-06 13:28:55 - example] Proguard returned with error code 1. See console
[2016-01-06 13:28:55 - example] Warning: com.google.gson.jpush.internal.ab: can't find referenced class com.google.gson.jpush.internal.w$com.google.gson.jpush.internal.ac
[2016-01-06 13:28:55 - example] Warning: com.google.gson.jpush.internal.w: can't find referenced class com.google.gson.jpush.internal.w$com.google.gson.jpush.internal.y
[2016-01-06 13:28:55 - example] Warning: com.google.gson.jpush.internal.w: can't find referenced class com.google.gson.jpush.internal.w$com.google.gson.jpush.internal.aa
[2016-01-06 13:28:55 - example] Warning: com.google.gson.jpush.internal.z: can't find referenced class com.google.gson.jpush.internal.w$com.google.gson.jpush.internal.ac
[2016-01-06 13:28:55 - example] Warning: there were 4 unresolved references to classes or interfaces.
[2016-01-06 13:28:55 - example] You may need to specify additional library jars (using '-libraryjars').
[2016-01-06 13:28:55 - example] java.io.IOException: Please correct the above warnings first.
[2016-01-06 13:28:55 - example] at proguard.Initializer.execute(Initializer.java:321)
[2016-01-06 13:28:55 - example] at proguard.ProGuard.initialize(ProGuard.java:211)
[2016-01-06 13:28:55 - example] at proguard.ProGuard.execute(ProGuard.java:86)
[2016-01-06 13:28:55 - example] at proguard.ProGuard.main(ProGuard.java:492)
[2016-01-06 13:35:40 - example] Proguard returned with error code 1. See console