-keepattributes *Annotation*
-keepclassmembers enum android.arch.lifecycle.Lifecycle$Event {
<fields>;
}
-keep class * implements android.arch.lifecycle.LifecycleObserver {
}
-keep class * implements android.arch.lifecycle.GeneratedAdapter {
<init>(...);
}
-keepclassmembers class ** {
@android.arch.lifecycle.OnLifecycleEvent *;
}