java.lang.RuntimeException: Method decode in android.util.Base64 not mocked. See
http://g.co/androidstudio/not-mocked for details.
at android.util.Base64.decode(Base64.java)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)