【Android】Android Studio 进行代码混淆，打包release APK

lock的错： Error:Timeout waiting to lock cp_proj class cache for build file '/Users/raomengyang/work/app/build.gradle' (/Users/raomengyang/.gradle/caches/2.8/scripts/build_aldsk0ke4ednnd4pf0nybqlhq/cp_proj). It is currently in use by another Gradle instance. Owner PID: unknown Our PID: 20080 Owner Operation: unknown Our operation: Initialize cache Lock file: /Users/raomengyang/.gradle/caches/2.8/scripts/build_aldsk0ke4ednnd4pf0nybqlhq/cp_proj/cache.properties.lock 之前遇到过同样的情况，是将带lock的文件给恢复权限解决的，可是这次不管用，于是退出AS重新来，每次遇到这个问题然后退出AS都会提示后台还有任务没有结束，所以这个错误个人感觉是AS还有后台任务没有被结束，以至于一直hold在这儿。 3.各种specified twice： java.io.IOException: The same input jar [/Users/raomengyang/work/app/libs/**] is specified twice. 删掉proguard文件中的重复声明引用的jar文件。 4.满天的Warning： Note: there were 157 duplicate class definitions. (http://proguard./manual/troubleshooting.html#duplicateclass) Warning:library class org.apache.http.auth.AuthenticationException extends or implements program class org.apache.http.ProtocolException Warning:library class org.apache.http.auth.MalformedChallengeException extends or implements program class org.apache.http.ProtocolException Warning:library class org.apache.http.auth.params.AuthParamBean extends or implements program class org.apache.http.params.HttpAbstractParamBean Warning:library class org.apache.http.client.NonRepeatableRequestException extends or implements program class org.apache.http.ProtocolException Warning:library class org.apache.http.client.RedirectException extends or implements program class org.apache.http.ProtocolException Warning:library class org.apache.http.client.entity.UrlEncodedFormEntity extends or implements program class org.apache.http.entity.StringEntity Warning:library class org.apache.http.client.methods.HttpEntityEnclosingRequestBase extends or implements program class org.apache.http.HttpEntityEnclosingRequest Warning:library class org.apache.http.client.methods.HttpRequestBase extends or implements program class org.apache.http.message.AbstractHttpMessage Warning:library class org.apache.http.client.methods.HttpUriRequest extends or implements program class org.apache.http.HttpRequest Warning:library class org.apache.http.client.params.AllClientPNames extends or implements program class org.apache.http.params.CoreConnectionPNames ………………………………………………………………………………………………Warning…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………Warning…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………Warning…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………Warning…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………Warning…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………Warning…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………Warning…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… Warning:library class org.apache.http.client.params.AllClientPNames extends or implements program class org.apache.http.params.CoreProtocolPNames Warning:library class org.apache.http.client.params.ClientParamBean extends or implements program class org.apache.http.params.HttpAbstractParamBean Warning:library class org.apache.http.client.protocol.RequestAddCookies extends or implements program class org.apache.http.HttpRequestInterceptor Warning:library class org.apache.http.client.protocol.RequestDefaultHeaders extends or implements program class org.apache.http.HttpRequestInterceptor Warning:library class org.apache.http.client.protocol.RequestProxyAuthentication extends or implements program class org.apache.http.HttpRequestInterceptor 该类问题都可以根据我们的class文件来进行以下声明： 例如：现在提示的是org.apache.http.* 这个包里的类有问题，那么就加入下述代码： -keep class org.apache.http.** { *;