Android – Proguard failed after updating Google play service to version 5.0 (revision 18)

My ant script for compiling my Android application works normally, but after updating the Google play service library to version 5.0 (revision 18), Proguard fails and displays the following output:

-obfuscate:
    [mkdir] Created dir: /srv2/jenkins/jobs/CCNF Google only/workspace/trunk/org.digitalcure.ccnf.app/bin/proguard
      [jar] Building jar: /srv2/jenkins/jobs/CCNF Google only/workspace/trunk/org.digitalcure.ccnf.app/bin/proguard/original.jar
 [proguard] ProGuard, version 4.7
 [proguard] Reading input...
 [proguard] Reading program jar [/srv2/jenkins/jobs/CCNF Google only/workspace/trunk/org.digitalcure.ccnf.app/bin/proguard/original.jar]
 [proguard] Reading program jar [/srv2/jenkins/jobs/CCNF Google only/workspace/trunk/org.digitalcure.android.common/bin/classes.jar]
 [proguard] Reading program jar [/srv2/jenkins/jobs/CCNF Google only/workspace/trunk/google-play-services_lib/bin/classes.jar]
 [proguard] Reading program jar [/srv2/jenkins/jobs/CCNF Google only/workspace/trunk/android-support-v7-appcompat/bin/classes.jar]
 [proguard] Reading program jar [/srv2/jenkins/jobs/CCNF Google only/workspace/trunk/android-support-v7-appcompat/libs/android-support-v7-appcompat.jar]
 [proguard] Reading program jar [/srv2/jenkins/jobs/CCNF Google only/workspace/trunk/android-support-v7-appcompat/libs/android-support-v4.jar]
 [proguard] Reading program jar [/srv2/jenkins/jobs/CCNF Google only/workspace/trunk/google-play-services_lib/libs/google-play-services.jar]
 [proguard] Reading library jar [/srv/jenkins/tools/android-sdk-linux/platforms/android-17/android.jar]
 [proguard] Initializing...
 [proguard] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager
 [proguard] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager$CaptionStyle
 [proguard] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager$CaptionStyle
 [proguard] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager$CaptionStyle
 [proguard] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager$CaptionStyle
 [proguard] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager$CaptionStyle
 [proguard] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager
 [proguard] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager
 [proguard] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager$CaptionStyle
 [proguard] Note: android.support.v4.app.NotificationCompatJellybean: can't find dynamically referenced class android.app.Notification$Action
 [proguard] Note: android.support.v4.text.ICUCompatIcs: can't find dynamically referenced class libcore.icu.ICU
 [proguard] Note: com.google.android.gms.maps.internal.u: can't find dynamically referenced class com.google.android.gms.maps.internal.CreatorImplGmm6
 [proguard] Note: com.google.android.gms.maps.internal.u: can't find dynamically referenced class com.google.android.gms.maps.internal.CreatorImpl
 [proguard] Note: the configuration refers to the unkNown class 'com.google.vending.licensing.ILicensingService'
 [proguard] Note: the configuration refers to the unkNown class 'com.android.vending.licensing.ILicensingService'
 [proguard] Note: the configuration refers to the unkNown class 'Object'
 [proguard]       Maybe you meant the fully qualified name 'java.lang.Object'?
 [proguard] Note: the configuration refers to the unkNown class 'fqcn.of.javascript.interface.for.webview'
 [proguard] Note: the configuration keeps the entry point 'com.google.ads.AdSize { AdSize(com.google.android.gms.ads.AdSize); }', but not the descriptor class 'com.google.android.gms.ads.AdSize'
 [proguard] Note: the configuration keeps the entry point 'com.google.ads.mediation.admob.AdMobAdapter { com.google.android.gms.ads.AdRequest a(android.content.Context,com.google.android.gms.ads.mediation.MediationAdRequest,android.os.Bundle,android.os.Bundle); }', but not the descriptor class 'com.google.android.gms.ads.mediation.MediationAdRequest'
 [proguard] Note: the configuration keeps the entry point 'com.google.ads.mediation.admob.AdMobAdapter { void requestBannerAd(android.content.Context,com.google.android.gms.ads.mediation.MediationBannerListener,android.os.Bundle,com.google.android.gms.ads.AdSize,com.google.android.gms.ads.mediation.MediationAdRequest,android.os.Bundle); }', but not the descriptor class 'com.google.android.gms.ads.mediation.MediationBannerListener'
 [proguard] Note: the configuration keeps the entry point 'com.google.ads.mediation.admob.AdMobAdapter { void requestBannerAd(android.content.Context,com.google.android.gms.ads.mediation.MediationBannerListener,android.os.Bundle,com.google.android.gms.ads.AdSize,com.google.android.gms.ads.mediation.MediationAdRequest,android.os.Bundle); }', but not the descriptor class 'com.google.android.gms.ads.AdSize'
 [proguard] Note: the configuration keeps the entry point 'com.google.ads.mediation.admob.AdMobAdapter { void requestBannerAd(android.content.Context,com.google.android.gms.ads.mediation.MediationBannerListener,android.os.Bundle,com.google.android.gms.ads.AdSize,com.google.android.gms.ads.mediation.MediationAdRequest,android.os.Bundle); }', but not the descriptor class 'com.google.android.gms.ads.mediation.MediationAdRequest'
 [proguard] Note: the configuration keeps the entry point 'com.google.ads.mediation.admob.AdMobAdapter { void requestInterstitialAd(android.content.Context,com.google.android.gms.ads.mediation.MediationInterstitialListener,android.os.Bundle,com.google.android.gms.ads.mediation.MediationAdRequest,android.os.Bundle); }', but not the descriptor class 'com.google.android.gms.ads.mediation.MediationInterstitialListener'
 [proguard] Note: the configuration keeps the entry point 'com.google.ads.mediation.admob.AdMobAdapter { void requestInterstitialAd(android.content.Context,com.google.android.gms.ads.mediation.MediationInterstitialListener,android.os.Bundle,com.google.android.gms.ads.mediation.MediationAdRequest,android.os.Bundle); }', but not the descriptor class 'com.google.android.gms.ads.mediation.MediationAdRequest'
 [proguard] Note: the configuration keeps the entry point 'com.google.ads.mediation.admob.AdMobAdapter$a { AdMobAdapter$a(com.google.ads.mediation.admob.AdMobAdapter,com.google.android.gms.ads.mediation.MediationBannerListener); }', but not the descriptor class 'com.google.android.gms.ads.mediation.MediationBannerListener'
 [proguard] Note: the configuration keeps the entry point 'com.google.ads.mediation.admob.AdMobAdapter$b { AdMobAdapter$b(com.google.ads.mediation.admob.AdMobAdapter,com.google.android.gms.ads.mediation.MediationInterstitialListener); }', but not the descriptor class 'com.google.android.gms.ads.mediation.MediationInterstitialListener'
 [proguard] Note: the configuration keeps the entry point 'com.google.ads.mediation.customevent.CustomEventAdapter { void requestBannerAd(com.google.ads.mediation.MediationBannerListener,android.app.Activity,com.google.ads.mediation.customevent.CustomEventServerParameters,com.google.ads.AdSize,com.google.ads.mediation.MediationAdRequest,com.google.android.gms.ads.mediation.customevent.CustomEventExtras); }', but not the descriptor class 'com.google.android.gms.ads.mediation.customevent.CustomEventExtras'
 [proguard] Note: the configuration keeps the entry point 'com.google.ads.mediation.customevent.CustomEventAdapter { void requestInterstitialAd(com.google.ads.mediation.MediationInterstitialListener,android.app.Activity,com.google.ads.mediation.customevent.CustomEventServerParameters,com.google.ads.mediation.MediationAdRequest,com.google.android.gms.ads.mediation.customevent.CustomEventExtras); }', but not the descriptor class 'com.google.android.gms.ads.mediation.customevent.CustomEventExtras'
 [proguard] Note: there were 4 references to unkNown classes.
 [proguard]       You should check your configuration for typos.
 [proguard] Note: there were 11 unkept descriptor classes in kept class members.
 [proguard]       You should consider explicitly keeping the mentioned classes
 [proguard]       (using '-keep').
 [proguard] Note: there were 5 unresolved dynamic references to classes or interfaces.
 [proguard]       You should check if you need to specify additional program jars.
 [proguard] Warning: there were 9 unresolved references to classes or interfaces.
 [proguard]          You may need to specify additional library jars (using '-libraryjars').

Comparing it with the previous (working) output, the following lines are new:

 [proguard] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager
 [proguard] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager$CaptionStyle
 [proguard] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager$CaptionStyle
 [proguard] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager$CaptionStyle
 [proguard] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager$CaptionStyle
 [proguard] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager$CaptionStyle
 [proguard] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager
 [proguard] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager
 [proguard] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager$CaptionStyle
 [proguard] Note: android.support.v4.app.NotificationCompatJellybean: can't find dynamically referenced class android.app.Notification$Action

Add the error message at the end of the output

What happened? Its contact with Android. View. Accessibility. Captioningmanager was introduced at API level 19

resolvent:

I noticed that the target version of the Android support library was changed from 16 to 19 (and updated to revision 20). My application was built for target version 17. So I changed the target version of the main application project from 17 to 19. Now everything is fine. That's all!