最近在弄Android Studio的Gradle檔案，發現自己的專案有個地方一直編譯不過去，報的錯誤如下：

Warning:io.bugtags.agent.instrumentation.okhttp3.ResponseBuilderExtension: can't find referenced class okhttp3.Response$Builder
Warning:io.bugtags.agent.instrumentation.okhttp3.ResponseBuilderExtension: can't find referenced class okhttp3.Headers
 

Warning:io.bugtags.agent.instrumentation.okhttp3.ResponseBuilderExtension: can't find referenced class okhttp3.ResponseBody
Warning:io.bugtags.agent.instrumentation.okhttp3.ResponseBuilderExtension: can't find referenced class okhttp3.Response$Builder
Warning:io.bugtags.agent.instrumentation.okhttp3.ResponseBuilderExtension
 
: can't find referenced class okhttp3.ResponseBody
Warning:io.bugtags.agent.instrumentation.okhttp3.ResponseBuilderExtension: can't find referenced class okhttp3.Response
Warning:io.bugtags.agent.instrumentation.okhttp3.ResponseBuilderExtension: can't find referenced class okhttp3.Response$Builder
Warning:io.bugtags.agent.instrumentation.okhttp3.ResponseBuilderExtension: can'
 
t find referenced class okhttp3.Response
Warning:io.bugtags.agent.instrumentation.okhttp3.ResponseBuilderExtension: can't find referenced class okhttp3.Response$Builder
Warning:io.bugtags.agent.instrumentation.okhttp3.ResponseBuilderExtension: can't find referenced class okhttp3.Response
Warning:io.bugtags.agent.instrumentation.okhttp3.ResponseBuilderExtension: can't find referenced class okhttp3.Response$Builder
Warning:io.bugtags.agent.instrumentation.okhttp3.ResponseBuilderExtension: can't find referenced class okhttp3.Response
Warning:there were 528 unresolved references to classes or interfaces.
Warning:Exception while processing task java.io.IOException: Please correct the above warnings first.
Error:Execution failed for task ':app:transformClassesAndResourcesWithProguardForDfy_dev_Release'.
> java.io.IOException: Please correct the above warnings first.
Information:BUILD FAILED
Information:Total time: 1 mins 22.716 secs
Information:1 error
Information:278 warnings
Information:See complete output in console

可以看到錯誤是出在app:transformClassesAndResourcesWithProguard階段，也就是Proguard混淆可能出現了問題。同時從上面的logcat可以看出，錯誤的地方應該是bugtags下面相應的邏輯。
bugtags是一個捕捉bug的sdk，那麼在它的文件裡應該在proguard-rules.pro有相應的配置，那麼找到配置，如下：

# ProGuard configurations for Bugtags
-keepattributes LineNumberTable,SourceFile

-keep class com.bugtags.library.** {*;}
-dontwarn org.apache.http.**
-dontwarn android.net.http.AndroidHttpClient
-dontwarn com.bugtags.library.**
# End Bugtags

那麼經過查閱資料，改為下面的程式碼可以通過編譯：

# ProGuard configurations for Bugtags
-keepattributes LineNumberTable,SourceFile

-keep class com.bugtags.library.** {*;}
-keep class io.bugtags.** {*;}
-dontwarn io.bugtags.**
-dontwarn org.apache.http.**
-dontwarn android.net.http.AndroidHttpClient
-dontwarn com.bugtags.library.**
# End Bugtags

可以看到，加了中間的兩行：

-keep class io.bugtags.** {*;}
-dontwarn io.bugtags.**

這兩行程式碼可以保證我們的應用編譯通過，而不會導致出現由於庫找不到而產生的崩潰性bug。
gradle檔案和我們所加的第三方庫經常會有一些衝突，上面的問題可能只是其中一種情況。如果大家對我的解決方法有什麼建議的話，希望提出來。