###排除所有注解类
-keep class * extends java.lang.annotation.Annotation { *; }-keep interface * extends java.lang.annotation.Annotation { *; }
###保留使用xUtils的方法和类，并且不要混淆名字
-keep @com.lidroid.xutils.db.annotation.Table class *
-keepclassmembers class * {
@com.lidroid.xutils.db.annotation.* <fields>;
}
-keepclassmembers, allowobfuscation class * {
@com.lidroid.xutils.view.annotation.* <fields>;
@com.lidroid.xutils.view.annotation.event.* <methods>;
}