Code:
floatingActionButton: FloatingActionButton( onPressed: () { showGeneralDialog( barrierLabel: "Label", barrierDismissible: true, barrierColor: Colors.black.withOpacity(0.5), transitionDuration: Duration(milliseconds: 700), context: context, pageBuilder: (context, anim1, anim2) { return Align( alignment: Alignment.bottomCenter, child: Container( height: 300, child: SizedBox.expand(child: FlutterLogo()), margin: EdgeInsets.only(bottom: 50, left: 12, right: 12), decoration: BoxDecoration( color: Colors.white, borderRadius: BorderRadius.circular(40), ), ), ); }, transitionBuilder: (context, anim1, anim2, child) { return SlideTransition( position: Tween(begin: Offset(0, 1), end: Offset(0, 0)).animate(anim1), child: child, ); }, ); },)
