Backview widgets are align correctly.BackView is moved to a seperate function.

Author: kishan2612

lib/stackView.dart

@@ -45,48 +45,58 @@ class _MainActivityState extends State<MainActivity> {
  return Container(
  child: Stack(
  children: <Widget>[
- Container(
- color: _theme.primaryColor,
- child: Center(
- child: Column(
- children: <Widget>[
- MaterialButton(
- onPressed: () => _backViewOnClick(0),
- child:
- Text("Captain America", style: TextStyle(fontSize: 30)),
- ),
- MaterialButton(
- onPressed: () => _backViewOnClick(1),
- child: Text(
- "Iron Man",
- style: TextStyle(fontSize: 30),
- ),
- ),
- MaterialButton(
- onPressed: () => _backViewOnClick(2),
- child: Text(
- "Thor",
- style: TextStyle(fontSize: 30),
- ),
- ),
- MaterialButton(
- onPressed: () => _backViewOnClick(3),
- child: Text(
- "Hulk",
- style: TextStyle(fontSize: 30),
- ),
- )
- ],
- ),
- ),
- ),
+ _backView(_theme),
  SlideTransition(
  position: _getSlideAnimation(constraint), child: _frontView())
  ],
  ),
  );
  }
 
+Widget _backView(ThemeData theme){
+return Scaffold(
+ appBar: AppBar(
+ backgroundColor: theme.backgroundColor,
+ elevation: 0.0,
+ ),
+ backgroundColor: theme.backgroundColor,
+ body: Container(
+ child: Center(
+ child: Column(
+ children: <Widget>[
+ MaterialButton(
+ onPressed: () => _backViewOnClick(0),
+ child:
+ Text("Captain America", style: TextStyle(fontSize: 30)),
+ ),
+ MaterialButton(
+ onPressed: () => _backViewOnClick(1),
+ child: Text(
+ "Iron Man",
+ style: TextStyle(fontSize: 30),
+ ),
+ ),
+ MaterialButton(
+ onPressed: () => _backViewOnClick(2),
+ child: Text(
+ "Thor",
+ style: TextStyle(fontSize: 30),
+ ),
+ ),
+ MaterialButton(
+ onPressed: () => _backViewOnClick(3),
+ child: Text(
+ "Hulk",
+ style: TextStyle(fontSize: 30),
+ ),
+ )
+ ],
+ ),
+ ),
+ ),
+);
+}
+
  Widget _frontView() {
  return Scaffold(
  appBar: AppBar(