firebase_ml_model_downloader 0.3.1+5

A Flutter plugin allowing you to use Firebase Ml Model Downloader.

example/lib/main.dart

// Copyright 2022, the Chromium project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_ml_model_downloader/firebase_ml_model_downloader.dart';
import 'package:flutter/material.dart';

import 'firebase_options.dart';

const kModelName = "mobilenet_v1_1_0_224";

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp(
    options: DefaultFirebaseOptions.currentPlatform,
  );
  runApp(const MyApp());
}

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

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

class _MyAppState extends State<MyApp> {
  @override
  void initState() {
    super.initState();
    initWithLocalModel();
  }

  FirebaseCustomModel? model;

  /// Initially get the lcoal model if found, and asynchronously get the latest one in background.
  initWithLocalModel() async {
    final newModel = await FirebaseModelDownloader.instance.getModel(
        kModelName, FirebaseModelDownloadType.localModelUpdateInBackground);

    setState(() {
      model = newModel;
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData(primarySwatch: Colors.amber),
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Padding(
          padding: const EdgeInsets.all(20.0),
          child: Center(
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                SizedBox(
                  width: double.infinity,
                  child: Card(
                    margin: EdgeInsets.zero,
                    child: Padding(
                      padding: const EdgeInsets.all(8.0),
                      child: model != null
                          ? Column(
                              crossAxisAlignment: CrossAxisAlignment.start,
                              children: [
                                Text('Model name: ${model!.name}'),
                                Text('Model size: ${model!.size}'),
                              ],
                            )
                          : const Text("No local model found"),
                    ),
                  ),
                ),
                const SizedBox(height: 20),
                Row(
                  children: [
                    Expanded(
                      child: ElevatedButton(
                        onPressed: () async {
                          final newModel =
                              await FirebaseModelDownloader.instance.getModel(
                                  kModelName,
                                  FirebaseModelDownloadType.latestModel);

                          setState(() {
                            model = newModel;
                          });
                        },
                        child: const Text('Get latest model'),
                      ),
                    ),
                    const SizedBox(width: 20),
                    Expanded(
                      child: ElevatedButton(
                        onPressed: () async {
                          await FirebaseModelDownloader.instance
                              .deleteDownloadedModel(kModelName);

                          setState(() {
                            model = null;
                          });
                        },
                        child: const Text('Delete local model'),
                      ),
                    ),
                  ],
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}