From @ginev on May 13, 2015 8:21
The default NativeScriptActivity inherits from android.app.Activity which is limiting the available APIs for scenarios that use the support libraries. For instance, if we want to use an Android component in our NativeScript application that depends on FragmentActivity.getSupportFragmentManager() - we won't be able to.
Copied from original issue: NativeScript/NativeScript#155