I am trying to add validation too my password text form field in my app in flutter. The problem is that my validator text is too long so only parts of it shows on the screen. Is there any way to make the text form field below it automatically slide down so the whole validation text is shown?
The text form fields are placed in a column inside a form.
Appreciate any help,
Cheers!
This code will work for you.
TextFormField(
maxLines: null,
keyboardType: TextInputType.multiline,
validator: (value) {
print(value);
return null;
},
),
Related
How can we display the count of input characters entered by the user and how many characters user can type in that TEXTFORMFIELD in Flutter? Like this
image credits : blog link
You can add maxLength property (it will show the writtenCharacters/totalLimit)
TextFormField(
maxLength: 45,
)
Or you can also have alternative (it will not show the writtenCharacters/totalLimit), but for this you need to import
import 'package:flutter/services.dart';
TextFormField(
inputFormatters: [
LengthLimitingTextInputFormatter(45),
],
)
You can still use a TextField and achieve what a TextFormField do by saving the input of the TextField to a variable on text changed
TextField(
maxLines: 3,
maxLength: 30,
onChanged: (value) {
_content = value;
},
),
and send _content on your form submit
With a TextFormField you can have the number of input character by passing an
TextEditingController to the TextFormField
final _myTextEditingController = TextEditingController();
TextFormField(
controller: _myTextEditingController,
maxLength: 30
)
and show the number of character with
_myTextEditingController.text.length
I started out writing a Flutter app to remotely control some radio stream. I ran into a problem when adding a TextFormField to display the stream's current volume setting. (The reason why I opted for a TextFormField instead of simply Text is that I wanted to use the field for both showing the current setting and letting the user change the current value in one place.)
The problem is the following: When I added the TextFormField (located inside the green bar in the screen shot below, after the text Vol:), I realized that whenever I started this view/page, the onboard keyboard always showed up by default when entering the page.
Instead, I would like the keyboard to only show up when the user clicks inside the TextFormField.
The code for the TextFormField looks as follows:
TextFormField(
onFieldSubmitted: (value){
print("The value entered is : $value");
},
// Define keyboard type
keyboardType: TextInputType.number,
// Make sure user doesn't enter letters or punctuation
inputFormatters: <TextInputFormatter>[WhitelistingTextInputFormatter.digitsOnly],
validator: (val){
return null;
},
autofocus: true,
controller: volTextEditingController,
style: TextStyle(
color: Colors.white,
fontSize: 16,
),
decoration: InputDecoration(
border: InputBorder.none,
),
maxLines: 1,
)
So, I was wondering whether someone knows how to prevent the keyboard from appearing on startup of the shown view/page. Thanks in advance! The full code, if needed, is available on GitGub.
I just figured out that this problem was caused by the setting autofocus: true. So, removing this solves the issue.
I have a TextFormField where the user can edit text. While editing the text, I want the user to see the whole text that he has entered. Is there a way to do this? Currently only one line of the text is visible while editing.
You can use multilines property.
TextField(
keyboardType: TextInputType.multiline,
maxLines: null,
)
You can also set 'maxLines' to say 3 if you desire maximum 3 lines in the user input.
You can use the keyboardType attribute of TextField and maxLines (null for auto wrap):
TextField(
keyboardType: TextInputType.multiline,
maxLines: <max_lines_number>
)
I've been scratching my head on this. Perhaps someone can help.
I have a statefull widget with a TextFormField and a button that calls the ImagePicker.pickImage function.
When I write something in the textformInput and then click on the select image button, when the image select returns from the picking, the textformfield has the text before I wrote.
It seems the onChanged function is never called when I press the button, so I cannot update my model variable.
I also tried to listen for focus out event on the textformfield widget but it also doesnt get called.
What am I missing? Any tip would be great.
Thanks
TextFormField(
keyboardType: TextInputType.multiline,
maxLines: 5,
controller: _observationsFieldController,
onChanged: (String value) {
onFieldChanged(_observationsFieldController, value);
widget.user_file.observations = value;
},
decoration: InputDecoration(
contentPadding: EdgeInsets.symmetric(horizontal:10, vertical: 2),
hintText: 'Observations',
suffix: clearSuffix(_observationsFieldController),
),
),
Have you tried using setState()? Since you are updating the state, it might work when you call set state.
Here, I am having one add product field and when i submit that field it will add a product but when i am attaching the keyboard and then hit enter it will not submitting that filed instead of that it will go to the new line. can you anyone help me with this? thank you in advance:)
You need help from textInputAction
Take a try with this:
TextField(
textInputAction: TextInputAction.done,
onSubmitted: (value) {
print("onSubmitted $value");
},
);