gemini_nano_android 0.0.1

A Flutter plugin to access on-device Gemini Nano models via Android AI Core. Enables offline inference and privacy-first text generation.

example/lib/main.dart

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

import 'package:flutter/services.dart';
import 'package:gemini_nano_android/gemini_nano_android.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _platformVersion = 'Unknown';
  bool? _isAvailable;
  String _generatedText = '';
  final _promptController = TextEditingController();
  final _geminiNanoAndroidPlugin = GeminiNanoAndroid();

  @override
  void initState() {
    super.initState();
    initPlatformState();
  }

  // Platform messages are asynchronous, so we initialize in an async method.
  Future<void> initPlatformState() async {
    String platformVersion;
    bool? isAvailable;
    // Platform messages may fail, so we use a try/catch PlatformException.
    // We also handle the message potentially returning null.
    try {
      platformVersion =
          await _geminiNanoAndroidPlugin.getPlatformVersion() ??
          'Unknown platform version';
    } on PlatformException {
      platformVersion = 'Failed to get platform version.';
    }

    try {
      isAvailable = await _geminiNanoAndroidPlugin.isAvailable();
    } on PlatformException {
      isAvailable = false;
    }

    // If the widget was removed from the tree while the asynchronous platform
    // message was in flight, we want to discard the reply rather than calling
    // setState to update our non-existent appearance.
    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
      _isAvailable = isAvailable;
    });
  }

  Future<void> _generateText() async {
    if (_promptController.text.isEmpty) return;

    setState(() {
      _generatedText = 'Generating...';
    });

    try {
      final result = await _geminiNanoAndroidPlugin.generate(
        _promptController.text,
      );
      if (!mounted) return;
      setState(() {
        _generatedText = result;
      });
    } catch (e) {
      if (!mounted) return;
      setState(() {
        _generatedText = 'Error: $e';
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: const Text('Gemini Nano Example')),
        body: Padding(
          padding: const EdgeInsets.all(16.0),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.start,
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              Text('Running on: $_platformVersion'),
              const SizedBox(height: 8),
              Text('Gemini Nano Available: ${_isAvailable ?? "Checking..."}'),
              const SizedBox(height: 20),
              TextField(
                controller: _promptController,
                decoration: const InputDecoration(
                  labelText: 'Enter prompt',
                  border: OutlineInputBorder(),
                ),
                maxLines: 3,
              ),
              const SizedBox(height: 10),
              ElevatedButton(
                onPressed: _isAvailable == true ? _generateText : null,
                child: const Text('Generate'),
              ),
              const SizedBox(height: 20),
              const Text(
                'Result:',
                style: TextStyle(fontWeight: FontWeight.bold),
              ),
              const SizedBox(height: 10),
              Expanded(
                child: SingleChildScrollView(child: Text(_generatedText)),
              ),
            ],
          ),
        ),
      ),
    );
  }
}