我试图混淆我的apk，但我有一个dao的问题。这里是第二个图像问题，在我的代码下面，对于de-proguard规则，为什么我需要保留类？

-useuniqueclassmembernames
-dontusemixedcaseclassnames
-dontoptimize
-dontshrink

-keepparameternames

-keep public class * extends android.app.Activity
-keep public class * extends android.app.Application

-keepclasseswithmembernames class * {
native <methods>;
}

-keepclasseswithmembers class * {
public <init>(android.content.Context, android.util.AttributeSet);
}

-keepclasseswithmembers class * {
public <init>(android.content.Context, android.util.AttributeSet, int);
}

-keepclassmembers class * extends android.app.Activity {
public void *(android.view.View);
}

-keep class my.dao.package.*$Properties {
public static <fields>;
}

-keepclassmembers class my.dao.package.**{
public java.lang.String TABLENAME;
}