The new BlackBerry Runtime for Android apps allows you to run Android 2.3.3 platform applications on the BlackBerry PlayBook tablet. To use the runtime, you must first repackage your Android applications to BAR file format, which is the compatible file format required for an application to run on the BlackBerry Tablet OS.
BlackBerry provide tools for developer, to not only repackage your application to BAR file format but also to check how compatible your application is for running on the BlackBerry Tablet OS. Some of the APIs in the Android SDK may not be supported, or only partially supported by the BlackBerry Runtime for Android apps.
Know more: https://bdsc.webapps.blackberry.com/android/