SingleChildScrollView is not scrolling with Stack Widget Flutter - flutter

Question

Here when I type inside text fields Keyboard covers the Login button. So I need to scroll down to the Login button when typing. I tried wrapping LayoutBuilder with SingleChildScrollView and tried using Positioned widget inside Stack but nothing solved my issue. And I set physics to AlwaysScrollableScrollPhysics() inside SingleChildScrollView but it also didn't solve the problem. I can't figure out what I've done wrong. I would be grateful if anyone can help me with this issue
Here's my code
Material(
child: SingleChildScrollView(
child: Stack(
overflow: Overflow.clip,
children: <Widget>[
Image.asset(
'assets/login-screen-img.jpg'
),
Padding(
padding: const EdgeInsets.fromLTRB(16.0, 220.0, 16.0, 0),
child: Card(
child: Padding(
padding: const EdgeInsets.fromLTRB(16.0, 16.0, 16.0, 24.0),
child: Form(
//associating global key with the form(It keeps track of the form)
key: _formKey,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Text('Email', style: TextStyle(fontSize: 14.0, color: Colors.grey),),
TextFormField( // email field
cursorColor: Colors.brown[500],
decoration: InputDecoration(
focusedBorder: UnderlineInputBorder(
borderSide: BorderSide(color: Colors.brown[500])
),
//hintText: 'Enter your Email'
),
// validation
validator: (email) => email.isEmpty ? 'Enter the email' : null,
onChanged: (emailInput) {
setState(() {
email = emailInput;
});
},
),
SizedBox(height: 16.0),
Text('Password', style: TextStyle(fontSize: 14.0, color: Colors.grey),),
TextFormField( // password field
cursorColor: Colors.brown[500],
decoration: InputDecoration(
//hintText: 'Enter your Password'
focusedBorder: UnderlineInputBorder(
borderSide: BorderSide(color: Colors.brown[500])
)
),
// validation
validator: (password) => password.length < 6 ? 'Password must be more than 6 characters' : null,
obscureText: true, // hide when type
onChanged: (passwordInput) {
setState(() {
password = passwordInput;
});
},
),
SizedBox(height: 48.0,),
Center(
child: RaisedButton( // login button
child: Text('LOG IN', style: TextStyle(fontSize: 16.0, color: Colors.white),),
color: Colors.brown[500],
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(25)
),
padding: EdgeInsets.fromLTRB(66.0, 16.0, 66.0, 16.0),
onPressed: () async {
if(_formKey.currentState.validate()) {
// show loading screen
setState(() {
loading = true;
});
dynamic result = await _auth.signInWithEmailAndPassword(email, password);
if(result == null) {
// stop showing loading screen/widget
setState(() {
loading = false;
});
// show an error message
Fluttertoast.showToast(
msg: 'Could not sign in!',
toastLength: Toast.LENGTH_SHORT,
);
}
}
},
),
),
SizedBox(height: 24.0),
Center(child: Text('Don\'t have and account ?' )),
SizedBox(height: 16.0,),
Center(
child: FlatButton( // sign up button
child: Text('SIGN UP', style: TextStyle(fontSize: 16.0, color: Colors.brown[500] )),
onPressed: (){
Navigator.push(context, MaterialPageRoute(
builder: (context) => SignUp()
));
},
),
)
],
),
),
),
),
)
],
),
),
);
Screenshot of my UI

Answer 1

Here I found that the issue is with the height of the stack. As #sajithlakmal mentioned in the comments, height of the stack is small and there is nothing to scroll. But in my case, I don't want to make an extra height than the screen height because this is just a login screen. I could easily solve the issue by replacing Material widget with Scaffold. inside the body of the Scaffold gives the required height when typing and able to scroll down.
Here's the working code.
Scaffold(
body: SingleChildScrollView(
child: Stack(
overflow: Overflow.visible,
children: <Widget>[
Image.asset(
'assets/login-screen-img.jpg',
alignment: Alignment.topCenter,
),
Padding(
padding: const EdgeInsets.fromLTRB(16.0, 220.0, 16.0, 0),
child: Card(
child: Padding(
padding: const EdgeInsets.fromLTRB(16.0, 16.0, 16.0, 24.0),
child: Form(
//associating global key with the form(It keeps track of the form)
key: _formKey,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Text('Email', style: TextStyle(fontSize: 14.0, color: Colors.grey),),
TextFormField( // email field
cursorColor: Colors.brown[500],
decoration: InputDecoration(
focusedBorder: UnderlineInputBorder(
borderSide: BorderSide(color: Colors.brown[500])
),
//hintText: 'Enter your Email'
),
// validation
validator: (email) => email.isEmpty ? 'Enter the email' : null,
onChanged: (emailInput) {
setState(() {
email = emailInput;
});
},
),
SizedBox(height: 16.0),
Text('Password', style: TextStyle(fontSize: 14.0, color: Colors.grey),),
TextFormField( // password field
cursorColor: Colors.brown[500],
decoration: InputDecoration(
//hintText: 'Enter your Password'
focusedBorder: UnderlineInputBorder(
borderSide: BorderSide(color: Colors.brown[500])
)
),
// validation
validator: (password) => password.length < 6 ? 'Password must be more than 6 characters' : null,
obscureText: true, // hide when type
onChanged: (passwordInput) {
setState(() {
password = passwordInput;
});
},
),
SizedBox(height: 48.0,),
Center(
child: RaisedButton( // login button
child: Text('LOG IN', style: TextStyle(fontSize: 16.0, color: Colors.white),),
color: Colors.brown[500],
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(25)
),
padding: EdgeInsets.fromLTRB(66.0, 16.0, 66.0, 16.0),
onPressed: () async {
if(_formKey.currentState.validate()) { // check validation
// show loading screen
setState(() {
loading = true;
});
dynamic result = await _auth.signInWithEmailAndPassword(email, password);
if(result == null) {
// stop showing loading screen/widget
setState(() {
loading = false;
});
// show an error message
Fluttertoast.showToast(
msg: 'Could not sign in!',
toastLength: Toast.LENGTH_SHORT,
);
}
}
},
),
),
SizedBox(height: 24.0),
Center(child: Text('Don\'t have and account ?' )),
SizedBox(height: 16.0,),
Center(
child: FlatButton( // sign up button
child: Text('SIGN UP', style: TextStyle(fontSize: 16.0, color: Colors.brown[500] )),
onPressed: (){
Navigator.push(context, MaterialPageRoute(
builder: (context) => SignUp()
));
},
),
)
],
),
),
),
),
)
],
),
),
);