.java

public class ActivityPrimaryTheme extends AbstractFragmentActivity {

    // The layout resource you want to find the FrameLayout.
    @Override
    protected int getLayoutResId() {
        return R.layout.activity_primary;
    }

    // The default frameLayout id you want to inject the fragments.
    @Override
    protected int getContainerViewId() {
        return R.id.frmContainer;
    }
}