Google Analytics と Proguard を有効にして APK をエクスポートしようとすると、この問題が発生します。
この条件をconfに追加しました->
-keep public class com.google.** {*;}
そして、これはコンソール出力です
Proguard returned with error code 1. See console
[2013-10-26 19:25:17 - UploadToServer] Warning: com.google.android.apps.analytics.easytracking.EasyTracker: can't find referenced class com.google.android.apps.analytics.Item
[2013-10-26 19:25:17 - UploadToServer] Warning: com.google.android.apps.analytics.easytracking.EasyTracker: can't find referenced class com.google.android.apps.analytics.Transaction
[2013-10-26 19:25:17 - UploadToServer] Warning: com.google.android.apps.analytics.easytracking.EasyTracker$4: can't find referenced class com.google.android.apps.analytics.Item
[2013-10-26 19:25:17 - UploadToServer] Warning: com.google.android.apps.analytics.easytracking.EasyTracker$4: can't find referenced class com.google.android.apps.analytics.Item
[2013-10-26 19:25:17 - UploadToServer] Warning: com.google.android.apps.analytics.easytracking.EasyTracker$5: can't find referenced class com.google.android.apps.analytics.Transaction
[2013-10-26 19:25:17 - UploadToServer] Warning: com.google.android.apps.analytics.easytracking.EasyTracker$5: can't find referenced class com.google.android.apps.analytics.Transaction
[2013-10-26 19:25:17 - UploadToServer] Warning: com.google.android.apps.analytics.easytracking.GoogleAnalyticsTrackerDelegate: can't find referenced class com.google.android.apps.analytics.Transaction
[2013-10-26 19:25:17 - UploadToServer] Warning: com.google.android.apps.analytics.easytracking.GoogleAnalyticsTrackerDelegate: can't find referenced class com.google.android.apps.analytics.Item
[2013-10-26 19:25:17 - UploadToServer] Warning: com.google.android.apps.analytics.easytracking.GoogleAnalyticsTrackerDelegateImpl: can't find referenced class com.google.android.apps.analytics.GoogleAnalyticsTracker
[2013-10-26 19:25:17 - UploadToServer] Warning: com.google.android.apps.analytics.easytracking.GoogleAnalyticsTrackerDelegateImpl: can't find referenced class com.google.android.apps.analytics.GoogleAnalyticsTracker
[2013-10-26 19:25:17 - UploadToServer] Warning: com.google.android.apps.analytics.easytracking.GoogleAnalyticsTrackerDelegateImpl: can't find referenced class com.google.android.apps.analytics.GoogleAnalyticsTracker
[2013-10-26 19:25:17 - UploadToServer] Warning: com.google.android.apps.analytics.easytracking.GoogleAnalyticsTrackerDelegateImpl: can't find referenced class com.google.android.apps.analytics.GoogleAnalyticsTracker
[2013-10-26 19:25:17 - UploadToServer] Warning: com.google.android.apps.analytics.easytracking.GoogleAnalyticsTrackerDelegateImpl: can't find referenced class com.google.android.apps.analytics.GoogleAnalyticsTracker
[2013-10-26 19:25:17 - UploadToServer] Warning: com.google.android.apps.analytics.easytracking.GoogleAnalyticsTrackerDelegateImpl: can't find referenced class com.google.android.apps.analytics.GoogleAnalyticsTracker
[2013-10-26 19:25:17 - UploadToServer] Warning: com.google.android.apps.analytics.easytracking.GoogleAnalyticsTrackerDelegateImpl: can't find referenced class com.google.android.apps.analytics.GoogleAnalyticsTracker
[2013-10-26 19:25:17 - UploadToServer] Warning: com.google.android.apps.analytics.easytracking.GoogleAnalyticsTrackerDelegateImpl: can't find referenced class com.google.android.apps.analytics.GoogleAnalyticsTracker
[2013-10-26 19:25:17 - UploadToServer] Warning: com.google.android.apps.analytics.easytracking.GoogleAnalyticsTrackerDelegateImpl: can't find referenced class com.google.android.apps.analytics.GoogleAnalyticsTracker
[2013-10-26 19:25:17 - UploadToServer] Warning: com.google.android.apps.analytics.easytracking.GoogleAnalyticsTrackerDelegateImpl: can't find referenced class com.google.android.apps.analytics.GoogleAnalyticsTracker
[2013-10-26 19:25:17 - UploadToServer] Warning: com.google.android.apps.analytics.easytracking.GoogleAnalyticsTrackerDelegateImpl: can't find referenced class com.google.android.apps.analytics.GoogleAnalyticsTracker
[2013-10-26 19:25:17 - UploadToServer] Warning: com.google.android.apps.analytics.easytracking.GoogleAnalyticsTrackerDelegateImpl: can't find referenced class com.google.android.apps.analytics.GoogleAnalyticsTracker
[2013-10-26 19:25:17 - UploadToServer] Warning: com.google.android.apps.analytics.easytracking.GoogleAnalyticsTrackerDelegateImpl: can't find referenced class com.google.android.apps.analytics.GoogleAnalyticsTracker
[2013-10-26 19:25:17 - UploadToServer] Warning: com.google.android.apps.analytics.easytracking.GoogleAnalyticsTrackerDelegateImpl: can't find referenced class com.google.android.apps.analytics.GoogleAnalyticsTracker
[2013-10-26 19:25:17 - UploadToServer] Warning: com.google.android.apps.analytics.easytracking.GoogleAnalyticsTrackerDelegateImpl: can't find referenced class com.google.android.apps.analytics.GoogleAnalyticsTracker