The method 'GenerateTextRequest' isn't defined for the type '_ChatPageState'.

[Akshaykushawaha]

The issue is reproducible with the given example on the github repo and the official website for the code to "generate text": final request = GenerateTextRequest( prompt: TextPrompt(text: userMessage), temperature: 1.0, candidateCount: 2, );

Error: The method 'GenerateTextRequest' isn't defined for the type '_ChatPageState'. The method 'generateText' isn't defined for the type 'GenerativeLanguageAPI'.

[SaadArdati]

Hey @Akshaykushawaha, please provide more code so I can get a better idea of what we're dealing with here.

The generateText function is a static function inside of the GenerativeLanguageAPI class.

You can use it like so:

    const request = GenerateTextRequest(
      prompt: TextPrompt(text: 'Write a story about a magic backpack.'),
      temperature: 1.0,
      candidateCount: 2,
    );

    final response = await GenerativeLanguageAPI.generateText(
      modelName: textModel,
      request: request,
      apiKey: apiKey,
    );

    print(const JsonEncoder.withIndent('  ').convert(response));

Please make sure to import the package by adding this line at the top of your dart file like so: import 'package:google_generative_language_api/google_generative_language_api.dart';

[Akshaykushawaha]

Hey, thankyou for the quick response, as i said, you can use the example code on the website given and reproduce the error, either way heres' my code:

import 'package:flutter/material.dart';
import 'package:google_generative_language_api/google_generative_language_api.dart';

class ChatMessage {
  final String text;
  final bool isUser;

  ChatMessage(this.text, this.isUser);
}

class ChatPage extends StatefulWidget {

  @override
  State<ChatPage> createState() => _ChatPageState();
}

class _ChatPageState extends State<ChatPage> {
  final List<ChatMessage> _chatMessages = [];
  final TextEditingController _messageController = TextEditingController();

  void _sendMessage(String message) {
    if (message.isNotEmpty) {
      setState(() {
        _chatMessages.add(ChatMessage(message, true));
      });

      // Simulate sending the user message to the AI backend
      _getAIResponse(message);
    }
  }

  Future<void> _getAIResponse(String userMessage) async {
    // Replace 'PALM_API_KEY' with your actual Generative Language API key
    final request = GenerateTextRequest(
      prompt: TextPrompt(text: userMessage),
      temperature: 1.0,
      candidateCount: 2,
    );

    // Call the Generative Language API to generate text
    final response = await GenerativeLanguageAPI.generateText(
      modelName: 'models/text-bison-001',
      request: request,
      apiKey: 'YOUR_GENERATIVE_LANGUAGE_API_KEY',
    );

    // Process the AI-generated response
    final aiResponse = response.candidates
        .map((candidate) => candidate.output)
        .join('\n');

    setState(() {
      _chatMessages.add(ChatMessage(aiResponse, false));
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('AI Chatbot'),
      ),
      body: Column(
        children: <Widget>[
          Expanded(
            child: ListView.builder(
              itemCount: _chatMessages.length,
              itemBuilder: (context, index) {
                final chatMessage = _chatMessages[index];
                return ListTile(
                  title: Text(chatMessage.text),
                  subtitle: chatMessage.isUser ? Text('User') : Text('AI'),
                );
              },
            ),
          ),
          Padding(
            padding: const EdgeInsets.all(8.0),
            child: Row(
              children: <Widget>[
                Expanded(
                  child: TextField(
                    controller: _messageController,
                    decoration: InputDecoration(labelText: 'Enter your message'),
                  ),
                ),
                IconButton(
                  icon: Icon(Icons.send),
                  onPressed: () {
                    _sendMessage(_messageController.text);
                    _messageController.clear();
                  },
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }
}

i am getting the same issue with your code as well! :'(

Error: The method 'GenerateTextRequest' isn't defined for the type '_ChatPageState'.
Error: The method 'TextPrompt' isn't defined for the type '_ChatPageState'.
Error: The method 'generateText' isn't defined for the type 'GenerativeLanguageAPI'.

[Akshaykushawaha]

can you give me some sample code thats working for you?

[SaadArdati]

@Akshaykushawaha Your code works perfectly for me:

Did you run flutter pub get? Are you seeing any errors in your editor?