flutter_bluetooth_serial 0.0.1

  • README.md
  • CHANGELOG.md
  • Example
  • Installing
  • Versions
  • 73

flutter_bluetooth_serial

Flutter basic implementation for Classical Bluetooth.

Based on flutter_blue.

The first goal of this project is making an interface for Serial Port Protocol (HC-05 Adapter).

This plugin needs a lot of improvements, so I need your help. Any kind of collaboration will be awesome.

Click on the ⭐ star above and open your issue.

Getting Started

Only for Android.

[0.0.1] - 2018-??-??

  • Only Android support.

example/lib/main.dart

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

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

void main() => runApp(new MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => new _MyAppState();
}

class _MyAppState extends State<MyApp> {
  static final TextEditingController _message = new TextEditingController();
  static final TextEditingController _text = new TextEditingController();

  FlutterBluetoothSerial bluetooth = FlutterBluetoothSerial.instance;

  List<BluetoothDevice> _devices = [];
  BluetoothDevice _device;
  bool _connected = false;
  bool _pressed = false;

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

  Future<void> initPlatformState() async {
    List<BluetoothDevice> devices = [];

    try {
      devices = await bluetooth.getBondedDevices();
    } on PlatformException {
      // TODO - Error
    }

    bluetooth.onStateChanged().listen((state) {
      switch (state) {
        case FlutterBluetoothSerial.CONNECTED:
          setState(() {
            _connected = true;
            _pressed = false;
          });
          break;
        case FlutterBluetoothSerial.DISCONNECTED:
          setState(() {
            _connected = false;
            _pressed = false;
          });
          break;
        default:
          // TODO
          print(state);
          break;
      }
    });

    bluetooth.onRead().listen((msg) {
      setState(() {
        print('Read: $msg');
        _text.text += msg;
      });
    });

    if (!mounted) return;
    setState(() {
      _devices = devices;
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Flutter Bluetooth Serial'),
        ),
        body: Container(
          child: ListView(
            children: <Widget>[
              Padding(
                padding:
                    const EdgeInsets.only(left: 10.0, top: 10.0, right: 10.0),
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  children: <Widget>[
                    Text(
                      'Device:',
                      style: TextStyle(
                        fontWeight: FontWeight.bold,
                      ),
                    ),
                    DropdownButton(
                      items: _getDeviceItems(),
                      onChanged: (value) => setState(() => _device = value),
                      value: _device,
                    ),
                    RaisedButton(
                      onPressed:
                          _pressed ? null : _connected ? _disconnect : _connect,
                      child: Text(_connected ? 'Disconnect' : 'Connect'),
                    ),
                  ],
                ),
              ),
              Padding(
                padding:
                    const EdgeInsets.only(left: 10.0, top: 6.0, right: 10.0),
                child: Row(
                  children: <Widget>[
                    Expanded(
                      child: new TextField(
                        controller: _message,
                        autocorrect: false,
                        keyboardType: TextInputType.text,
                        decoration: new InputDecoration(
                          border: InputBorder.none,
                          labelText: 'Message:',
                        ),
                      ),
                    ),
                    RaisedButton(
                      onPressed: _connected ? _writeTest : null,
                      child: Text('Send'),
                    ),
                  ],
                ),
              ),
              TextField(
                controller: _text,
                maxLines: null,
                enabled: false,
                decoration: new InputDecoration(
                  border: InputBorder.none,
                  labelText: 'Message:',
                ),

              ),
            ],
          ),
        ),
      ),
    );
  }

  List<DropdownMenuItem<BluetoothDevice>> _getDeviceItems() {
    List<DropdownMenuItem<BluetoothDevice>> items = [];
    if (_devices.isEmpty) {
      items.add(DropdownMenuItem(
        child: Text('NONE'),
      ));
    } else {
      _devices.forEach((device) {
        items.add(DropdownMenuItem(
          child: Text(device.name),
          value: device,
        ));
      });
    }
    return items;
  }

  void _connect() {
    if (_device == null) {
      show('No device selected.');
    } else {
      setState(() => _pressed = true);
      bluetooth.connect(_device).catchError((error) {
        setState(() => _pressed = false);
      });
    }
  }

  void _disconnect() {
    setState(() => _pressed = true);
    bluetooth.disconnect();
  }

  void _writeTest() {
    bluetooth.write(_message.text);
  }

  Future show(String message,
      {Duration duration: const Duration(seconds: 3)}) async {
    await new Future.delayed(new Duration(milliseconds: 100));
    Scaffold.of(context).showSnackBar(
          new SnackBar(
            content: new Text(
              message,
              style: new TextStyle(
                color: Colors.white,
              ),
            ),
            duration: duration,
          ),
        );
  }
}

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:


dependencies:
  flutter_bluetooth_serial: ^0.0.1

2. Install it

You can install packages from the command line:

with Flutter:


$ flutter packages get

Alternatively, your editor might support flutter packages get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:


import 'package:flutter_bluetooth_serial/flutter_bluetooth_serial.dart';
  
Version Uploaded Documentation Archive
0.0.1 Aug 20, 2018 Go to the documentation of flutter_bluetooth_serial 0.0.1 Download flutter_bluetooth_serial 0.0.1 archive
Popularity:
Describes how popular the package is relative to other packages. [more]
57
Health:
Code health derived from static analysis. [more]
100
Maintenance:
Reflects how tidy and up-to-date the package is. [more]
70
Overall:
Weighted score of the above. [more]
73
Learn more about scoring.

We analyzed this package on Sep 18, 2018, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.0.0
  • pana: 0.12.3
  • Flutter: 0.8.4

Platforms

Detected platforms: Flutter

References Flutter, and has no conflicting libraries.

Suggestions

The description is too short.

Add more detail about the package, what it does and what is its target use case. Try to write at least 60 characters.

Package is pre-v0.1 release.

While there is nothing inherently wrong with versions of 0.0.*, it usually means that the author is still experimenting with the general direction of the API.

Fix lib/flutter_bluetooth_serial.dart.

Analysis of lib/flutter_bluetooth_serial.dart reported 1 hint:

line 31 col 26: The getter '_methodStream' isn't used.

Dependencies

Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.0.0-a <3.0.0
flutter 0.0.0
Transitive dependencies
collection 1.14.11
meta 1.1.6
sky_engine 0.0.99
typed_data 1.1.6
vector_math 2.0.8