프로가드 오류인데 정말 모르겠습니다

Question

구글 음성검색 grpc-google-cloud-speech-v1 적용

하루종일 씨름해도 전혀 모르겠습니다.... 도움을 부탁드립니다.

 

에러 

Warning:Exception while processing task java.io.IOException: 
Can't write D:\workspace\aaa\bbb\ccc\build\intermediates\transforms\proguard\real\release\jars\3\1f\main.jar
Can't read C:\Users\admin\.gradle\caches\modules-2\files-2.1\com.google.protobuf\protobuf-lite\3.0.1\12344534534534534534534534fc\protobuf-lite-3.0.1.jar(;;;;;;**.class) 
Duplicate zip entry protobuf-lite-3.0.1.jar:com/google/protobuf/AbstractMessageLite$Builder$LimitedInputStream.class

 

환경

안드로이드 스튜디오(IDE) 버전 3.0.1

openjdk 1.8.0

 

빌드.그래들

ext {

    grpcVersion = '1.4.0'

}

 

dependencies {

 

compile group: 'com.google.api.grpc', name: 'grpc-google-cloud-speech-v1', version: '0.1.13'

    compile "io.grpc:grpc-okhttp:${grpcVersion}"

    compile "io.grpc:grpc-protobuf-lite:${grpcVersion}"

    compile "io.grpc:grpc-stub:${grpcVersion}"

    compile 'javax.annotation:javax.annotation-api:1.2'

//    compile 'com.google.protobuf:protobuf-lite:3.0.1'

//    protobuf 'com.google.protobuf:protobuf-java:3.0.1'

 

// OAuth2 for Google API

compile('com.google.auth:google-auth-library-oauth2-http:0.7.0') {

       exclude module: 'httpclient'

}