Problemi di compilazione dell'app Android in modalità di rilascio con proguard abilitato

Question

Sto provando a compilare la mia app Android con proguard, ma ottengo i seguenti errori e non so come risolverli. Qualcuno ha qualche idea? In modalità di debug tutto compila bene ...

Note: duplicate definition of library class [org.apache.http.conn.scheme.HostNameResolver] 
Note: duplicate definition of library class [org.apache.http.conn.scheme.SocketFactory] 
Note: duplicate definition of library class [org.apache.http.conn.ConnectTimeoutException] 
Note: duplicate definition of library class [org.apache.http.params.HttpParams] 
Note: duplicate definition of library class [android.net.http.SslCertificate$DName] 
Note: duplicate definition of library class [android.net.http.SslError] 
Note: duplicate definition of library class [android.net.http.SslCertificate] 
    Note: android.support.v4.app.NotificationCompatJellybean accesses a declared field 'title' dynamically 
      Maybe this is program field 'android.support.v4.app.NotificationCompat$Action { java.lang.CharSequence title; }' 
      Maybe this is program field 'android.support.v7.appcompat.R$attr { int title; }' 
      Maybe this is program field 'android.support.v7.appcompat.R$id { int title; }' 
      Maybe this is program field 'android.support.v7.mediarouter.R$attr { int title; }' 
      Maybe this is program field 'android.support.v7.mediarouter.R$id { int title; }' 
      Maybe this is program field 'com.facebook.share.internal.VideoUploader$UploadContext { java.lang.String title; }' 
      Maybe this is program field 'com.facebook.share.model.GameRequestContent { java.lang.String title; }' 
      Maybe this is program field 'com.facebook.share.model.GameRequestContent$Builder { java.lang.String title; }' 
      Maybe this is program field 'com.google.android.gms.games.internal.player.PlayerColumnNames { java.lang.String title; }' 
      Maybe this is program field 'com.google.android.gms.vision.barcode.Barcode$ContactInfo { java.lang.String title; }' 
      Maybe this is program field 'com.google.android.gms.vision.barcode.Barcode$UrlBookmark { java.lang.String title; }' 
      Maybe this is program field 'com.google.api.client.util.PemReader$Section { java.lang.String title; }' 
      Maybe this is program field 'com.android.app.R$attr { int title; }' 
      Maybe this is program field 'com.android.app.R$id { int title; }' 
      Maybe this is program field 'com.android.app.adapter.InAppListItem { java.lang.String title; }' 
      Maybe this is library field 'android.R$attr { int title; }' 
      Maybe this is library field 'android.R$id { int title; }' 
      Maybe this is library field 'android.app.Notification$Action { java.lang.CharSequence title; }' 
      Maybe this is library field 'android.preference.PreferenceActivity$Header { java.lang.CharSequence title; }' 
     Warning:library class com.google.api.client.auth.oauth2.TokenRequest depends on program class com.google.api.client.http.HttpRequestInitializer 
     Warning:library class com.google.api.client.auth.oauth2.TokenRequest depends on program class com.google.api.client.http.HttpExecuteInterceptor 
     Warning:library class com.google.api.client.auth.oauth2.TokenRequest depends on program class com.google.api.client.http.GenericUrl 
     Warning:library class com.google.api.client.auth.oauth2.TokenRequest depends on program class com.google.api.client.http.HttpResponse 
     Warning:library class com.google.api.client.auth.oauth2.TokenRequest depends on program class com.google.api.client.util.GenericData 
     Warning:library class com.google.api.client.auth.oauth2.TokenResponse depends on program class com.google.api.client.json.GenericJson 
     Warning:library class com.google.api.client.auth.oauth2.TokenResponse depends on program class com.google.api.client.util.GenericData 
     Warning:library class com.google.api.client.auth.openidconnect.IdToken depends on program class com.google.api.client.json.webtoken.JsonWebSignature$Header 
     Warning:library class com.google.api.client.auth.openidconnect.IdToken depends on program class com.google.api.client.json.JsonFactory 
     Warning:library class com.google.api.client.auth.openidconnect.IdToken depends on program class com.google.api.client.json.webtoken.JsonWebToken$Payload 
     Warning:library class com.google.api.client.auth.openidconnect.IdToken$Payload depends on program class com.google.api.client.json.webtoken.JsonWebToken$Payload 
     Warning:library class com.google.api.client.auth.openidconnect.IdToken$Payload depends on program class com.google.api.client.json.GenericJson 
     Warning:library class com.google.api.client.auth.openidconnect.IdToken$Payload depends on program class com.google.api.client.util.GenericData 
     Warning:library class com.google.api.client.auth.openidconnect.IdTokenVerifier depends on program class com.google.api.client.util.Clock 
     Warning:library class com.google.api.client.auth.openidconnect.IdTokenVerifier$Builder depends on program class com.google.api.client.util.Clock 
      Note: the configuration explicitly specifies 'org.apache.http.**' to keep library class 'org.apache.http.protocol.HttpRequestExecutor' 
      Note: the configuration explicitly specifies 'org.apache.http.**' to keep library class 'org.apache.http.protocol.HttpRequestInterceptorList' 
      Note: the configuration explicitly specifies 'org.apache.http.**' to keep library class 'org.apache.http.protocol.HttpResponseInterceptorList' 
      Note: the configuration explicitly specifies 'org.apache.http.**' to keep library class 'org.apache.http.protocol.SyncBasicHttpContext' 
      Note: the configuration explicitly specifies 'org.apache.http.**' to keep library class 'org.apache.http.util.EntityUtils' 
      Note: there were 2 references to unknown classes. 
        You should check your configuration for typos. 
        (http://proguard.sourceforge.net/manual/troubleshooting.html#unknownclass) 
      Note: there were 112 library classes explicitly being kept. 
        You don't need to keep library classes; they are already left unchanged. 
        (http://proguard.sourceforge.net/manual/troubleshooting.html#libraryclass) 
      Note: there were 16 unresolved dynamic references to classes or interfaces. 
        You should check if you need to specify additional program jars. 
        (http://proguard.sourceforge.net/manual/troubleshooting.html#dynamicalclass) 
      Note: there were 4 accesses to class members by means of introspection. 
        You should consider explicitly keeping the mentioned class members 
        (using '-keep' or '-keepclassmembers'). 
        (http://proguard.sourceforge.net/manual/troubleshooting.html#dynamicalclassmember) 
      Warning:there were 146 instances of library classes depending on program classes. 
        You must avoid such dependencies, since the program classes will 
        be processed, while the library classes will remain unchanged. 
        (http://proguard.sourceforge.net/manual/troubleshooting.html#dependency) 
      Warning:Exception while processing task java.io.IOException: Please correct the above warnings first. 
      :app:transformClassesAndResourcesWithProguardForRelease FAILED 
      Error:Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease'. 
      > java.io.IOException: Please correct the above warnings first. 

Il mio file Gradle si presenta così:

apply plugin: 'com.android.application' 
apply plugin: 'com.google.gms.google-services' 

android { 
    compileSdkVersion 'Google Inc.:Google APIs:23' 
    buildToolsVersion "23.0.1" 

    defaultConfig { 
     applicationId "com.test.app" 
     minSdkVersion 17 
     targetSdkVersion 21 
     versionCode 240 
     versionName "2.4.0" 
     // Enabling multidex support. 
     multiDexEnabled true 
    } 

    buildTypes { 
     release { 
      minifyEnabled true 
      proguardFile getDefaultProguardFile('proguard-android.txt') 
      proguardFile 'proguard-app.txt' 
     } 
    } 
} 

repositories { 
    mavenCentral() 
} 

dependencies { 
    compile 'com.google.http-client:google-http-client-gson:1.20.0' 
    compile 'com.google.code.gson:gson:2.4' 
    compile "com.android.support:appcompat-v7:23.1.1" 
    compile 'com.google.android.gms:play-services:8.3.0' 

    compile 'com.facebook.android:facebook-android-sdk:4.7.0' 
    compile 'com.android.support:support-v13:23.1.0' 
    compile files('libs/google-api-client-1.18.0-rc.jar') 
    compile files('libs/google-api-client-android-1.18.0-rc.jar') 
    compile files('libs/google-http-client-android-1.18.0-rc.jar') 
    compile files('libs/AudienceNetwork.jar') 
} 

e qui ist mio file Proguard Proguard-app.txt:

# This is a configuration file for ProGuard. 
# http://proguard.sourceforge.net/index.html#manual/usage.html 
-keep public class * extends android.app.Activity 
-keep public class * extends android.app.Application 
-keep public class * extends android.app.Service 
-keep public class * extends android.content.BroadcastReceiver 
-keep public class * extends android.content.ContentProvider 

-keep public class * extends android.view.View { 
    public <init>(android.content.Context); 
    public <init>(android.content.Context, android.util.AttributeSet); 
    public <init>(android.content.Context, android.util.AttributeSet, int); 
    public void set*(...); 
} 

-keepclasseswithmembers class * { 
    public <init>(android.content.Context, android.util.AttributeSet); 
} 

-keepclasseswithmembers class * { 
    public <init>(android.content.Context, android.util.AttributeSet, int); 
} 

-keepclassmembers class * extends android.content.Context { 
    public void *(android.view.View); 
    public void *(android.view.MenuItem); 
} 

-keepclassmembers class * implements android.os.Parcelable { 
    static ** CREATOR; 
} 

-keepclassmembers class **.R$* { 
    public static <fields>; 
} 

-keepclassmembers class * { 
    @android.webkit.JavascriptInterface <methods>; 
} 

-keepattributes Exceptions,InnerClasses,Signature 

-keep class com.google.api.client.** 
-keepclassmembers class com.google.api.client.** { 
    *; 
} 


-keep class com.google.android.gms.** 
-keepclassmembers class com.google.android.gms.** { 
    *; 
} 
-keep class com.google.gson.** 
-keepclassmembers class com.google.gson.** { 
    *; 
} 


-keep class com.google.ads.** 
-keepclassmembers class com.google.ads.** { 
    *; 
} 

-keep class bolts.** 
-keepclassmembers class bolts.** { 
    *; 
} 

-keep class com.google.api.client.** { *; } 
-dontwarn com.google.api.client.* 
-keep class org.apache.http.** { *; } 
-dontwarn org.apache.http.* 

-libraryjars libs 
#-injars libs/AudienceNetwork.jar 
#-injars libs/google-api-client-1.18.0-rc.jar 
#-injars libs/google-api-client-android-1.18.0-rc.jar 
#-injars libs/google-http-client-android-1.18.0-rc.jar 


# The official support library. 
-keep class android.support.v4.** { *; } 
-keepclassmembers class android.support.v4.** { 
    *; 
} 
-keep interface android.support.v4.** { *; } 
-keep class android.support.v7.** { *; } 
-keepclassmembers class android.support.v7.** { 
    *; 
} 
-keep interface android.support.v7.** { *; } 

# Library JARs. 
-keep class com.facebook.** { 
    *; 
} 
-keepclassmembers class com.facebook.** { 
    *; 
} 

Answer 1

Sostituzione

compile files('libs/google-api-client-1.18.0-rc.jar') 
compile files('libs/google-api-client-android-1.18.0-rc.jar') 
compile files('libs/google-http-client-android-1.18.0-rc.jar') 

con

compile 'com.google.api-client:google-api-client:1.18.0-rc' 
compile 'com.google.http-client:google-http-client-gson:1.18.0-rc' 
compile 'com.google.api-client:google-api-client-android:1.18.0-rc' 

risolto il problema.

Answer 2

Aggiungere le seguenti righe al file proguard-rules.pro

-keep class android.support.v4.** { *; } 
-dontnote android.support.v4.**