发布版本：transformClassesAndResourcesWithProguardForRelease FAILED

Question

生成签名的 APK：

Note: there were 8 unresolved dynamic references to classes or interfaces.
Note: there were 4 accesses to class members by means of introspection.
Warning: there were 5 unresolved references to classes or interfaces.
Warning: there were 1 unresolved references to program class members.

transformClassesAndResourcesWithProguardForRelease FAILED

Full Gradle log is here.

My app build.gradle is here.

UPD。 Stacktrace is here.

如果我使用 -ignorewarnings 选项，则该应用会在某些 Android 版本上崩溃。

大概是在去 Room 之后，我停止生成签名的 APK。 我还必须将 com.google.firebase、com.google.android.gms:play-services 从 11.0.4 降级到 11.0.2

两个简单的问题（对于那些知道的人）。

日志说：

Try: Run with --stacktrace option to get the stack trace. 
Run with --info or --debug option to get more log output.

第一季度。我可以在 Android Studio 的哪个位置指定“--stacktrace”、“--info 或--debug”选项？

第二季度。如何（我阅读日志）我必须找出缺少哪些课程？我应该去哪里看？要寻找什么？

Answer 1

Q1：在项目根目录的命令行中：./gradlew build --stacktrace

Q2：您应该修复此警告：

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: can't find referenced class 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: 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

您可以尝试将其添加到您的 proguard 文件中：

-dontwarn android.arch.util.paging.CountedDataSource
-dontwarn android.arch.persistence.room.paging.LimitOffsetDataSource

Answer 2

您可以在这里查看缺少哪些类

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: can't find referenced class 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: 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

看看如何实现 proguard 来处理这些类，您可以尝试将其添加到您的 proguard-rules.pro 文件中：

-dontwarn android.arch.**

或者你可以从你的构建中禁用 proguard (here)