Android-Proguard和Google Play服务的应用导出错误

我已将最新的Google Play服务添加到该项目中，现在proguard给了我很多警告：

[2014-07-31 17:21:50 - MyApp] Proguard returned with error code 1. See console
[2014-07-31 17:21:50 - MyApp] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager
[2014-07-31 17:21:50 - MyApp] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager$CaptionStyle
[2014-07-31 17:21:50 - MyApp] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager$CaptionStyle
[2014-07-31 17:21:50 - MyApp] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager$CaptionStyle
[2014-07-31 17:21:50 - MyApp] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager$CaptionStyle
[2014-07-31 17:21:50 - MyApp] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager$CaptionStyle
[2014-07-31 17:21:50 - MyApp] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager
[2014-07-31 17:21:50 - MyApp] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager
[2014-07-31 17:21:50 - MyApp] Warning: com.google.android.gms.cast.TextTrackStyle: can't find referenced class android.view.accessibility.CaptioningManager$CaptionStyle
[2014-07-31 17:21:50 - MyApp] Warning: com.google.android.gms.common.SupportErrorDialogFragment: can't find referenced method 'void setShowsDialog(boolean)' in class com.google.android.gms.common.SupportErrorDialogFragment
[2014-07-31 17:21:50 - MyApp] Warning: com.google.android.gms.common.api.d: can't find referenced method 'android.support.v4.app.FragmentActivity getActivity()' in class com.google.android.gms.common.api.d
[2014-07-31 17:21:50 - MyApp]       You should check if you need to specify additional program jars.
[2014-07-31 17:21:50 - MyApp] Warning: there were 9 unresolved references to classes or interfaces.
[2014-07-31 17:21:50 - MyApp]          You may need to specify additional library jars (using '-libraryjars').
[2014-07-31 17:21:50 - MyApp] Warning: there were 2 unresolved references to program class members.
[2014-07-31 17:21:50 - MyApp]          Your input classes appear to be inconsistent.
[2014-07-31 17:21:50 - MyApp]          You may need to recompile them and try again.
[2014-07-31 17:21:50 - MyApp]          Alternatively, you may have to specify the option 
[2014-07-31 17:21:50 - MyApp]          '-dontskipnonpubliclibraryclassmembers'.
[2014-07-31 17:21:50 - MyApp] java.io.IOException: Please correct the above warnings first.
[2014-07-31 17:21:50 - MyApp]   at proguard.Initializer.execute(Initializer.java:321)
[2014-07-31 17:21:50 - MyApp]   at proguard.ProGuard.initialize(ProGuard.java:211)
[2014-07-31 17:21:50 - MyApp]   at proguard.ProGuard.execute(ProGuard.java:86)
[2014-07-31 17:21:50 - MyApp]   at proguard.ProGuard.main(ProGuard.java:492)

我尝试添加

-dontwarn com.google.android.gms.*
-keep class android.support.v4.** { *; }

到proguard配置文件，但没有运气。我在我的应用中定位的是Android 17（4.2.2），而最低SDK版本是8（我认为是2.2）。

解决该错误的任何帮助将不胜感激。