I made a chatbot with dialogflow and (https://github.com/diegodalbosco/flutter_dialogflow) this is working normaly with simple text response.
Then when I add Google Assistant on a respond (Intent) like: answers with Basic Card.
When i lunch this application on android phone, I can write normally and i can see normal answers. But when i try to write "Query" or "Intent" something to call the Google Assistant Basic Card response, application stop and error.
Could someone help?
I believe that Google Assistant response is supported by Flutter?
Could some one explain how to set, display rich message of Google Assistant response like Basic Card in flutter App?
ThankYou
I haded: "
and
"ChatMessage message = new ChatMessage(
text: response.queryResult.fulfillmentText
?? new df.BasicCard(),"
and
"new Container(
margin: const EdgeInsets.only(top: 5.0),
child: new Text(text?? new df.BasicCard()),
),
"
looking for docs on:
https://pub.dev/documentation/flutter_dialogflow_v2/latest/model_query_result/QueryResult/fulfillmentMessages.html for fulfillmentMessages property
- https://pub.dev/documentation/flutter_dialogflow_v2/latest/model_message_basic_card/BasicCard-class.html for BasicCard
- https://pub.dev/documentation/flutter_dialogflow_v2/latest/model_query_result/QueryResult-class.html for QueryResult class
import 'package:flutter_dialogflow_v2/flutter_dialogflow_v2.dart' as df;
import 'package:flutter/material.dart';
void main() => runApp(new MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'Example Dialogflow Flutter',
theme: new ThemeData(
primarySwatch: Colors.deepOrange,
),
home: new MyHomePage(
title: 'Flutter Demo Dialogflow',
),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
final List<df.BasicCard> fulfillmentMessages = <df.BasicCard>[];
@override
_MyHomePageState createState() => new _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
final List<ChatMessage> _messages = <ChatMessage>[];
final TextEditingController _textController = new TextEditingController();
Widget _buildTextComposer() {
return new IconTheme(
data: new IconThemeData(color: Theme.of(context).accentColor),
child: new Container(
margin: const EdgeInsets.symmetric(horizontal: 8.0),
child: new Row(
children: <Widget>[
new Flexible(
child: new TextField(
controller: _textController,
onSubmitted: _handleSubmitted,
decoration:
new InputDecoration.collapsed(hintText: 'Send a message'),
),
),
new Container(
margin: new EdgeInsets.symmetric(horizontal: 4.0),
child: new IconButton(
icon: new Icon(Icons.send),
onPressed: () => _handleSubmitted(_textController.text)),
),
],
),
),
);
}
void response(query) async {
_textController.clear();
df.AuthGoogle authGoogle =
await df.AuthGoogle(fileJson: 'assets/project-id.json').build();
df.Dialogflow dialogflow =
df.Dialogflow(authGoogle: authGoogle, sessionId: '123456');
df.DetectIntentResponse response = await dialogflow.detectIntent(query);
ChatMessage message = new ChatMessage(
text: response.queryResult.fulfillmentText
?? new df.BasicCard()
,
name: 'Bot',
type: false,
);
setState(() {
_messages.insert(0, message);
});
}
void _handleSubmitted(String text) {
_textController.clear();
ChatMessage message = new ChatMessage(
text: text,
name: 'Rances',
type: true,
);
setState(() {
_messages.insert(0, message);
});
response(text);
}
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text('Dialogflow V2'),
),
body: new Column(children: <Widget>[
new Flexible(
child: new ListView.builder(
padding: new EdgeInsets.all(8.0),
reverse: true,
itemBuilder: (_, int index) => _messages[index],
itemCount: _messages.length,
)),
new Divider(height: 1.0),
new Container(
decoration: new BoxDecoration(color: Theme.of(context).cardColor),
child: _buildTextComposer(),
),
]),
);
}
}
class ChatMessage extends StatelessWidget {
ChatMessage({this.text, this.name, this.type});
final String text;
final String name;
final bool type;
List<Widget> otherMessage(context) {
return <Widget>[
new Container(
margin: const EdgeInsets.only(right: 16.0),
child: new CircleAvatar(child: new Image.asset('img/placeholder.png')),
),
new Expanded(
child: new Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
new Text(this.name,
style: new TextStyle(fontWeight: FontWeight.bold)),
new Container(
margin: const EdgeInsets.only(top: 5.0),
child: new Text(text?? new df.BasicCard()),
),
],
),
),
];
}
List<Widget> myMessage(context) {
return <Widget>[
new Expanded(
child: new Column(
crossAxisAlignment: CrossAxisAlignment.end,
children: <Widget>[
new Text(this.name, style: Theme.of(context).textTheme.subhead),
new Container(
margin: const EdgeInsets.only(top: 5.0),
child: new Text(text),
),
],
),
),
new Container(
margin: const EdgeInsets.only(left: 16.0),
child: new CircleAvatar(child: new Text(this.name[0])),
),
];
}
@override
Widget build(BuildContext context) {
return new Container(
margin: const EdgeInsets.symmetric(vertical: 10.0),
child: new Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: this.type ? myMessage(context) : otherMessage(context),
),
);
}
}
I expect the output like: when I ask the preset Intent for BasicCard, the app show response with BasicCard but the actual output is error: " E/flutter ( 4203): [ERROR:flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: NoSuchMethodError: The method '[]' was called on null. E/flutter ( 4203): Receiver: null E/flutter ( 4203): Tried calling: "
and no response on the flutter chat App.
