How to disable mobile keyboard action key using Flutter? - flutter

Question

I just need to disable the action button while the search query is empty. I'm not sure if this is possible with native Flutter.
Does this need to be done with each platform specifically? (iOS / Android)

Answer 1

You have a couple of options.
You can create a new focus:
FocusScope.of(context).requestFocus(new FocusNode())
Example:
Widget build(BuildContext context) {
return Scaffold(
body: SafeArea(
child: GestureDetector(
onTap: () {
FocusScope.of(context).requestFocus(new FocusNode());
},
child: ....,
)
)
)
}
The other option is to release the existing focus:
FocusScopeNode currentFocus = FocusScope.of(context);
if (!currentFocus.hasPrimaryFocus) {
currentFocus.unfocus();
}
There is also a package: keyboard_dismisser

Answer 2

You just need to add a FocusNode to your TextFormField and request focus for it if the user presses the submit button on the keyboard when the field is empty. Here is a complete example:
class KeyboardKeeper60943209 extends StatefulWidget {
#override
_KeyboardKeeper60943209State createState() => _KeyboardKeeper60943209State();
}
class _KeyboardKeeper60943209State extends State<KeyboardKeeper60943209> {
List<String> items = List.generate(20, (index) => 'item $index');
TextEditingController _textEditingController = TextEditingController();
FocusNode _focusNode = FocusNode();
#override
Widget build(BuildContext context) {
return Column(
children: <Widget>[
Row(
children: <Widget>[
Expanded(
child: TextFormField(
focusNode: _focusNode,
controller: _textEditingController,
decoration: InputDecoration(
prefixIcon: Icon(Icons.search),
labelText: 'Search',
hasFloatingPlaceholder: false,
),
// This is the key part
onFieldSubmitted: (value) {
if(value == ''){
_focusNode.requestFocus();
}
},
),
),
FlatButton(onPressed: search, child: Text('Search'))
],
),
Expanded(
child: Container(
child: ListView.builder(
itemBuilder: (context, index){
return ListTile(
title: Text(items[index]),
subtitle: Text(items[index]),
);
}
),
),
),
],
);
}
void search(){
print('search');
}
}

Answer 3

TextFormField(
readOnly: true,
showCursor: false,
controller: consName,
decoration: InputDecoration(
hintText: 'Enter Name',
labelText: 'Username',
focusedBorder: OutlineInputBorder(
borderSide: BorderSide(
color: Colors.deepPurple,
width: 2,
),
),
),
),
Very Simple & Easy Use "readOnly: true" for disabling keyboard and if you don't want pointer or cursor then "showCursor: false". That's it, hope this'll work. Eat Sleep Workout Code Repeat. Happy Coding😊.

Answer 4

You can simply use textInputAction: TextInputAction.none on the TextField.