Flutter: How to align textfield to bottom center in a column? - flutter

Question

I am building a chat app.
I have 2 items on the column. First one is information card which is on top of page,
I also have a textfield but I cant figure out how to place it on bottom center.
Here is the main code with the problem:
#override
Widget build(BuildContext context) {
return Scaffold(
resizeToAvoidBottomInset: true,
resizeToAvoidBottomPadding: true,
appBar: userMessageChatAppBar(context),
body: SingleChildScrollView(
child: Column(
children: [
userMessageChatInformationCard(context),
Positioned(
bottom: 20,
child: userMessageChatTextField())
],
),
),
);
TextField where chatting will occur:
Padding userMessageChatTextField() {
return Padding(
padding: const EdgeInsets.all(16.0),
child: TextField(
decoration: InputDecoration(
suffixIcon: RaisedButton.icon(
onPressed: () {},
icon: Icon(
Icons.send,
color: Colors.white,
),
color: Colors.blue,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.all(Radius.circular(20))),
label: Text(
"19.99₺",
style: TextStyle(color: Colors.white, fontSize: 18),
),
),
hintText: "Bir şeyler yaz",
border: new OutlineInputBorder(
borderSide: new BorderSide(color: Colors.teal)),
)),
);}
Information Card where user first sees:
Align userMessageChatInformationCard(BuildContext context) {
return Align(
alignment: Alignment.center,
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Container(
decoration: new BoxDecoration(
boxShadow: [
new BoxShadow(
color: Colors.grey,
blurRadius: 10.0,
),
],
),
child: Card(
clipBehavior: Clip.antiAlias,
child: Column(
children: [
Padding(
padding: const EdgeInsets.all(16.0),
child: Text(
'fernando muslera mesajını bekliyor',textAlign: TextAlign.center,
style: TextStyle(fontSize: 20.0, color: Colors.blueGrey),
),
),
Padding(
padding: const EdgeInsets.only(left: 20,right: 20,bottom: 20),
child: Text(
'280 karakterlik mesaj için ödeme yaparsın ünlünün mesajı alabilmesi uzun sürebilir',
textAlign: TextAlign.center, style: TextStyle(
color: Colors.black.withOpacity(0.6)),
),
),
],
),
),
)));
}

Answer 1

#override
Widget build(BuildContext context) {
return Scaffold(
resizeToAvoidBottomInset: true,
resizeToAvoidBottomPadding: true,
appBar: userMessageChatAppBar(context),
body: Column(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
userMessageChatInformationCard(context),
userMessageChatTextField()
],
),
);
}