Recorder Bookmarks

_{Estimated reading time: 4 minutes}

This guide will teach you how to display recorded logs data by using RecorderBookmarks class.

Saving Assets

Before running the app, ensure that you save the necessary file or files (.gm file) into the assets directory.

Update your pubspec.yaml file to include these assets:

flutter:
  assets:
    - assets/

How It Works

The example app demonstrates the following key features:

Import Recorder logs from assets folder to app documents directory.
Display logs metadata via LogMetadata class.
Delete logs.


Initial screen	Imported logs	Logs list page

UI and Map Integration

The following code builds the UI with a GemMap widget and an app bar containing a import log files button. Once the logs are imported, a RecorderBookmarks object is created and a button will appear on bottom of the screen. The recorder logs button will navigate to the RecorderBookmarksPage.

const projectApiToken = String.fromEnvironment('GEM_TOKEN');

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

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

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Recorder Bookmarks',
      home: MyHomePage(),
    );
  }
}

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

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  RecorderBookmarks? _recorderBookmarks;

  @override
  void dispose() {
    GemKit.release();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Colors.deepPurple[900],
        title: const Text('Recorder Bookmarks', style: TextStyle(color: Colors.white)),
        actions: [
          if (_recorderBookmarks == null)
            IconButton(
              onPressed: _onImportButtonPressed,
              icon: Icon(Icons.upload, color: Colors.white),
            ),
        ],
      ),
      body: Stack(
        children: [
          GemMap(
            key: ValueKey("GemMap"),
            appAuthorization: projectApiToken,
          ),
          if (_recorderBookmarks != null)
            Positioned(
              bottom: 15,
              left: 0,
              right: 0,
              child: ElevatedButton(
                  onPressed: () {
                    Navigator.of(context).push(
                      MaterialPageRoute<void>(
                        builder: (context) {
                          return RecorderBookmarksPage(recorderBookmarks: _recorderBookmarks!);
                        },
                      ),
                    );
                  },
                  child: Text("Recorder Logs")),
            ),
        ],
      ),
    );
  }

  Future<void> _onImportButtonPressed() async {
    // Upload log files from assets folder to phone's memory into Tracks directory
    copyLogToAppDocsDir("2025-04-29_12-42-26_700.gm");
    copyLogToAppDocsDir("2025-04-29_12-59-52_568.gm");

    // Get Tracks directory path
    final logsDirectory = await getDirectoryPath("Tracks");

    // Create a RecorderBookmarks instance based on Tracks directory location
    final recorderBookmarks = RecorderBookmarks.create(logsDirectory);

    if (recorderBookmarks == null) {
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(
            content: Text('Error while creating RecorderBookmarks'),
            duration: Duration(seconds: 3),
          ),
        );
      }
      return;
    }

    setState(() {
      _recorderBookmarks = recorderBookmarks;
    });

    // ignore: use_build_context_synchronously
    ScaffoldMessenger.of(context).showSnackBar(
      SnackBar(
        content: Text('Successfully imported logs.'),
        duration: Duration(seconds: 3),
      ),
    );
  }
}