我正在使用Android Room持久化库1.0.0-alpha5。 在使用ProGuard编译时，我遇到了以下错误。
Warning:android.arch.persistence.room.paging.LimitOffsetDataSource: can't find superclass or interface android.arch.util.paging.CountedDataSource
Warning:android.arch.persistence.room.paging.LimitOffsetDataSource: can't find referenced class android.arch.util.paging.CountedDataSource
Warning:android.arch.persistence.room.paging.LimitOffsetDataSource$1: can't find referenced method 'void invalidate()' in program class android.arch.persistence.room.paging.LimitOffsetDataSource
Warning:there were 5 unresolved references to classes or interfaces.
Warning:there were 1 unresolved references to program class members.
Warning:Exception while processing task java.io.IOException: Please correct the above warnings first.
我为Room配置的ProGuard如下：
-dontwarn okio.**
-dontwarn javax.annotation.Nullable
-dontwarn javax.annotation.ParametersAreNonnullByDefault
# Platform calls Class.forName on types which do not exist on Android to determine platform.
-dontnote retrofit2.Platform
# Platform used when running on Java 8 VMs. Will not be used at runtime.
-dontwarn retrofit2.Platform$Java8
# Retain generic type information for use by reflection by converters and adapters.
-keepattributes Signature
# Retain declared checked exceptions for use by a Proxy instance.
-keepattributes Exceptions
-keep class android.content.**
-dontwarn android.content.**
-keep class android.animation.**
-dontwarn android.animation.**
-keep class me.panavtec.drawableview.**
-dontwarn me.panavtec.drawableview.**
-keep class javax.annotation.concurrent.**
-dontwarn javax.annotation.concurrent.**
-keep class android.arch.persistence.room.paging.LimitOffsetDataSource
-keep interface android.arch.persistence.room.paging.LimitOffsetDataSource
-keep class android.arch.util.paging.CountedDataSource
-keep interface android.arch.util.paging.CountedDataSource
我需要帮助修复这个错误。我认为在Alpha 3之前不需要ProGuard配置，而且我没有测试过alpha 4。