-dontobfuscate
-optimizationpasses 5
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-dontpreverify
-verbose
-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*

# disable logging
-assumenosideeffects class android.util.Log {
    public static boolean isLoggable(java.lang.String, int);
    public static *** v(...);
    public static *** i(...);
    public static *** w(...);
    public static *** d(...);
    public static *** e(...);
}

#Keep the R
-keepclassmembers class **.R$* {
    public static <fields>;
}