| Attributes | Predefined attributes. |
| PermissionsRequester | Interface used to request permissions. |
| AccessibilityUtils | |
| CachedValue<T> | Caches a value in memory with an expiration. |
| DateUtils | Date utilities. |
| FarmHashFingerprint64 | Implementation of FarmHash Fingerprint64, an open-source fingerprinting algorithm for strings. |
| FileUtils | File utility methods. |
| FileUtils.DownloadResult | Result for downloading a file. |
| HelperActivity | This class is deprecated. Will be removed in SDK 17. Use your own activity to request results. |
| HelperActivity.ActivityResult | Wraps the result code and data from starting an activity for a result. |
| ImageUtils | A class containing utility methods related to bitmaps. |
| ImageUtils.DrawableResult | Drawable result. |
| NotificationIdGenerator | An auto-incrementing notification ID generator. |
| UAStringUtil | A class containing utility methods related to strings. |