Add text to TextField from an outside source - flutter

Question

I added a speech recognition to a text field, it works but I cannot manage to add the text to the textfield, is there a way to do that.
the textfield looks like this:
Widget _buildDescriptionTextField(productBloc) {
return StreamBuilder<Object>(
stream: productBloc.messageStream,
builder: (context, snapshot) {
return TextField(
maxLines: 3,
controller: _controllerMessage,
onChanged: productBloc.messageSink,
decoration: InputDecoration(
labelText: allTranslations.text(StringConstant.description),
errorText: snapshot.error,
suffixIcon: IconButton(icon: Icon(Icons.mic), onPressed: () {
if (_isAvailable && !_isListening)
_speechRecognition
.listen(locale: "en_US")
.then((result) => print('$result'));
},
),
),
);
}
);
}
I have a steam-builder to manage the added text manually, and an controller if this page is used for editing, then as suffixsIcon the iconButton to start the speech recognition. when I add the result text outside a text Widget it works but I need it inside the texField.

Answer 1

Just doing that should work no ?
setState(() => _controllerMessage.text = result)

Answer 2

You need to use TextEditingController properties. I assume you declared one as _controllerMessage.
To set new value to your TextField and keep the cursor in the end - use something similar to the example from the Docs.
e.g.
_speechRecognition
.listen(locale: "en_US")
.then(_onResult);
// ...
void _onResult(String result) {
setState(() {
_controllerMessage.value = _controllerMessage.value.copyWith(
text: result,
selection: TextSelection(baseOffset: result.length, extentOffset: result.length),
composing: TextRange.empty,
);
});
}
Let me know if this helped.

Answer 3

So What I did is just used the _speechRecognition.setRecognitionResultHandler from the documentation, to set a new value to the controller of the textField, like so:
_speechRecognition.setRecognitionResultHandler(
(String speech) => setState(() {
_controllerMessage = new TextEditingController(text: resultText = speech);
})
);
the textField stays like it was before, see question.