Android studio library项目 做jar混淆出现问题

jar包已经打出来了，运行的时候出现错误，整好长时间，哪位大神们可以帮忙一下看看
11-14 11:50:20.161 28470-28470/com.allscore.sdk E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.allscore.sdk, PID: 28470
java.lang.AbstractMethodError: abstract method not implemented
at com.allscore.paylib.Main.utils.e.run(VolleyUtil.java)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5333)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:895)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:711)
at dalvik.system.NativeStart.main(Native Method)