gradle - Android Studio proguard handling in multi-library projects -

i have application uses externally referenced library (that is, directory of library in same level application - not copied inside application's folder). library referenced application , both library , application include proguard files. works fine until build application. when built app, referenced classes defined in library not found - 'cannot find symbol class ...) errors on imports of library classes. found, because when rebuilding application, proguard obfuscates classes , variables , therefore application cannot reference them. have added following build.gradle file,

buildtypes {     release {         minifyenabled true         proguardfiles getdefaultproguardfile('proguard-android.txt'), 'proguard-project.txt'     }     debug {         minifyenabled false     } } 

but seems when building application, above not taken consideration (or building done in release mode). if change above following (i.e., disable proguard in release mode),

buildtypes {     release {         **minifyenabled false**         proguardfiles getdefaultproguardfile('proguard-android.txt'), 'proguard-project.txt'     }     debug {         minifyenabled false     } } 

the application compiles fine.

is there solution this? can enable proguard when creating signed application?

here library proguard file:

-optimizationpasses 5 -dontusemixedcaseclassnames -dontskipnonpubliclibraryclasses -dontpreverify -verbose -optimizations !code/simplification/arithmetic,!field/*,!class/merging/*  -optimizations !method/marking/static  -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.app.backup.backupagenthelper -keep public class * extends android.preference.preference -keep public class com.android.vending.licensing.ilicensingservice  -keepclasseswithmembernames class * {     native <methods>; }  -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.app.activity {    public void *(android.view.view); }  -keepclassmembers enum * {     public static **[] values();     public static ** valueof(java.lang.string); }  -keep class * implements android.os.parcelable {   public static final android.os.parcelable$creator *; }  -dontwarn **compathoneycomb -keep class android.support.v4.** { *; }  -keep class * extends java.util.listresourcebundle {     protected object[][] getcontents(); }  -keep public class com.google.android.gms.common.internal.safeparcel.safeparcelable {     public static final *** null; }  -keepnames @com.google.android.gms.common.annotation.keepname class * -keepclassmembernames class * {     @com.google.android.gms.common.annotation.keepname *; }  -keepnames class * implements android.os.parcelable {     public static final ** creator; }  -keep class com.google.android.gms.** { *; }  -keep public class com.google.ads.** { public *; } -keep public class com.google.gson.** { public protected *; } -keep public class com.google.ads.internal.** {*;}  -keep public class com.google.ads.internal.adwebview.** {*;}  -keep public class com.google.ads.internal.state.adstate {*;}  -keep public class com.google.ads.mediation.** { public *; }  -keep public class com.google.ads.searchads.** {*;}  -keep public class com.google.ads.util.** {*;}   -keep class com.google.ads.** -dontwarn com.google.ads.**  -keepattributes *annotation* 

is problem using proguard in both library , application?

after searching found answer. if using external/separate source libraries main project/application, should not use proguard on library modules. instead, replace following,

buildtypes {     release {         minifyenabled true         proguardfiles getdefaultproguardfile('proguard-android.txt'), 'proguard-project.txt'     }     debug {         minifyenabled false     } } 

with following (in build.gradle of library/libraries):

buildtypes {     release {         consumerproguardfiles 'proguard-project.txt'     } } 

where proguard-project.txt file contains proguard rules library project. when building application (either in debug or release mode), compiler take care of rules (in library , in application).