How do you change the value inside of a textfield flutter?

Question

I have a TextEditingController where if a user clicks a button it fills in with information. I can't seem to figure out how to change the text inside of a Textfield or TextFormField. Is there a solution?

Answer 1

Simply change the text property

    TextField(       controller: txt,     ),     RaisedButton(onPressed: () {         txt.text = "My Stringt";     }), 

while txt is just a TextEditingController

  var txt = TextEditingController(); 

Answer 2

The problem with just setting

_controller.text = "New value"; 

is that the cursor will be repositioned to the beginning (in material's TextField). Using

_controller.text = "Hello"; _controller.selection = TextSelection.fromPosition(     TextPosition(offset: _controller.text.length), ); setState(() {}); 

is not efficient since it rebuilds the widget more than it's necessary (when setting the text property and when calling setState).

--

I believe the best way is to combine everything into one simple command:

final _newValue = "New value"; _controller.value = TextEditingValue(       text: _newValue,       selection: TextSelection.fromPosition(         TextPosition(offset: _newValue.length),       ),     ); 

It works properly for both Material and Cupertino Textfields.