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ESP32 | FLUTER | BLE | Local Notifications
This commit is contained in:
Eric
@@ -0,0 +1,360 @@
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// Copyright 2017, Paul DeMarco.
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// All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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import 'dart:async';
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import 'package:flutter/cupertino.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter_blue/flutter_blue.dart';
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import 'package:flutter_blue_localnotify/widgets.dart';
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import 'package:flutter_local_notifications/flutter_local_notifications.dart';
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FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin;
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void main() {
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flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin();
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runApp(FlutterBlueApp());
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}
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class FlutterBlueApp extends StatelessWidget {
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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color: Colors.lightBlue,
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home: StreamBuilder<BluetoothState>(
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stream: FlutterBlue.instance.state,
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initialData: BluetoothState.unknown,
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builder: (c, snapshot) {
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final state = snapshot.data;
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if (state == BluetoothState.on) {
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return FindDevicesScreen();
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}
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return BluetoothOffScreen(state: state);
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}),
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);
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}
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}
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class BluetoothOffScreen extends StatelessWidget {
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const BluetoothOffScreen({Key key, this.state}) : super(key: key);
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final BluetoothState state;
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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backgroundColor: Colors.lightBlue,
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body: Center(
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: <Widget>[
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Icon(
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Icons.bluetooth_disabled,
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size: 200.0,
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color: Colors.white54,
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),
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Text(
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'Bluetooth Adapter is ${state.toString().substring(15)}.',
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style: Theme.of(context)
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.primaryTextTheme
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.subhead
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.copyWith(color: Colors.white),
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),
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],
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),
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),
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);
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}
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}
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class FindDevicesScreen extends StatelessWidget {
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(
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title: Text('Find Devices'),
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),
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body: RefreshIndicator(
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onRefresh: () =>
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FlutterBlue.instance.startScan(timeout: Duration(seconds: 4)),
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child: SingleChildScrollView(
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child: Column(
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children: <Widget>[
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StreamBuilder<List<BluetoothDevice>>(
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stream: Stream.periodic(Duration(seconds: 2))
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.asyncMap((_) => FlutterBlue.instance.connectedDevices),
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initialData: [],
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builder: (c, snapshot) => Column(
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children: snapshot.data
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.map((d) => ListTile(
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title: Text(d.name),
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subtitle: Text(d.id.toString()),
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trailing: StreamBuilder<BluetoothDeviceState>(
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stream: d.state,
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initialData: BluetoothDeviceState.disconnected,
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builder: (c, snapshot) {
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if (snapshot.data ==
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BluetoothDeviceState.connected) {
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return RaisedButton(
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child: Text('OPEN'),
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onPressed: () => Navigator.of(context).push(
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MaterialPageRoute(
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builder: (context) =>
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DeviceScreen(device: d))),
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);
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}
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return Text(snapshot.data.toString());
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},
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),
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))
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.toList(),
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),
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),
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StreamBuilder<List<ScanResult>>(
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stream: FlutterBlue.instance.scanResults,
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initialData: [],
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builder: (c, snapshot) => Column(
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children: snapshot.data
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.map(
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(r) => ScanResultTile(
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result: r,
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onTap: () => Navigator.of(context)
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.push(MaterialPageRoute(builder: (context) {
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r.device.connect();
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return DeviceScreen(device: r.device);
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})),
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),
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)
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.toList(),
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),
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),
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],
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),
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),
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),
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floatingActionButton: StreamBuilder<bool>(
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stream: FlutterBlue.instance.isScanning,
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initialData: false,
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builder: (c, snapshot) {
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if (snapshot.data) {
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return FloatingActionButton(
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child: Icon(Icons.stop),
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onPressed: () => FlutterBlue.instance.stopScan(),
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backgroundColor: Colors.red,
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);
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} else {
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return FloatingActionButton(
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child: Icon(Icons.search),
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onPressed: () => FlutterBlue.instance
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.startScan(timeout: Duration(seconds: 4)));
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}
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},
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),
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);
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}
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}
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class DeviceScreen extends StatefulWidget {
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const DeviceScreen({Key key, this.device}) : super(key: key);
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final BluetoothDevice device;
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@override
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_DeviceScreenState createState() => _DeviceScreenState();
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}
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class _DeviceScreenState extends State<DeviceScreen> {
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bool isConnected = false;
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List<Widget> _buildServiceTiles(List<BluetoothService> services) {
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return services
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.map(
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(s) => ServiceTile(
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service: s,
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characteristicTiles: s.characteristics
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.map(
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(c) => CharacteristicTile(
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characteristic: c,
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onReadPressed: () => c.read(),
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onWritePressed: () => c.write([13, 24]),
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onNotificationPressed: () =>
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c.setNotifyValue(!c.isNotifying),
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descriptorTiles: c.descriptors
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.map(
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(d) => DescriptorTile(
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descriptor: d,
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onReadPressed: () => d.read(),
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onWritePressed: () => d.write([11, 12]),
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),
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)
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.toList(),
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),
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)
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.toList(),
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),
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)
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.toList();
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}
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@override
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void initState() {
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super.initState();
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FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin =
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new FlutterLocalNotificationsPlugin();
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// initialise the plugin. app_icon needs to be a added as a drawable resource to the Android head project
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var initializationSettingsAndroid =
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new AndroidInitializationSettings('app_icon');
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var initializationSettingsIOS = new IOSInitializationSettings(
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onDidReceiveLocalNotification: onDidReceiveLocalNotification);
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var initializationSettings = new InitializationSettings(
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initializationSettingsAndroid, initializationSettingsIOS);
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flutterLocalNotificationsPlugin.initialize(initializationSettings,
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onSelectNotification: onSelectNotification);
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Timer.periodic(new Duration(seconds: 1), (timer) {
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FlutterBlue.instance.connectedDevices.then((value) {
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if (value.length >= 1 && !isConnected) {
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_showNotificationWithNoBadge("${widget.device.name}", "Connected");
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isConnected = true;
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} else if (value.length == 0 && isConnected) {
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_showNotificationWithNoBadge("${widget.device.name}", "Disconnected");
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isConnected = false;
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}
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});
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});
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}
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Future<void> _showNotificationWithNoBadge(String title, String body) async {
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var androidPlatformChannelSpecifics = AndroidNotificationDetails(
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'no badge channel', 'no badge name', 'no badge description',
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channelShowBadge: false,
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importance: Importance.Max,
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priority: Priority.High,
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onlyAlertOnce: true);
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var iOSPlatformChannelSpecifics = IOSNotificationDetails();
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var platformChannelSpecifics = NotificationDetails(
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androidPlatformChannelSpecifics, iOSPlatformChannelSpecifics);
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await flutterLocalNotificationsPlugin
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.show(0, title, body, platformChannelSpecifics, payload: 'item x');
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}
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Future<void> onDidReceiveLocalNotification(
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int id, String title, String body, String payload) async {
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// display a dialog with the notification details, tap ok to go to another page
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await showDialog(
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context: context,
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builder: (BuildContext context) => CupertinoAlertDialog(
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title: Text(title),
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content: Text(body),
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actions: [
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CupertinoDialogAction(
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isDefaultAction: true,
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child: Text('Ok'),
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onPressed: () async {
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Navigator.of(context, rootNavigator: true).pop();
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},
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)
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],
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),
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);
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}
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Future<void> onSelectNotification(String payload) async {
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if (payload != null) {
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debugPrint('notification payload: ' + payload);
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}
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}
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(
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title: Text(widget.device.name),
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actions: <Widget>[
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StreamBuilder<BluetoothDeviceState>(
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stream: widget.device.state,
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initialData: BluetoothDeviceState.connecting,
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builder: (c, snapshot) {
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VoidCallback onPressed;
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String text;
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switch (snapshot.data) {
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case BluetoothDeviceState.connected:
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onPressed = () => widget.device.disconnect();
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text = 'DISCONNECT';
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break;
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case BluetoothDeviceState.disconnected:
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onPressed = () => widget.device.connect();
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text = 'CONNECT';
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break;
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default:
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onPressed = null;
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text = snapshot.data.toString().substring(21).toUpperCase();
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break;
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}
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return FlatButton(
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onPressed: onPressed,
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child: Text(
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text,
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style: Theme.of(context)
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.primaryTextTheme
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.button
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.copyWith(color: Colors.white),
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));
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},
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)
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],
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),
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body: SingleChildScrollView(
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child: Column(
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children: <Widget>[
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StreamBuilder<BluetoothDeviceState>(
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stream: widget.device.state,
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initialData: BluetoothDeviceState.connecting,
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builder: (c, snapshot) => ListTile(
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leading: (snapshot.data == BluetoothDeviceState.connected)
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? Icon(Icons.bluetooth_connected)
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: Icon(Icons.bluetooth_disabled),
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title: Text(
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'Device is ${snapshot.data.toString().split('.')[1]}.'),
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subtitle: Text('${widget.device.id}'),
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trailing: StreamBuilder<bool>(
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stream: widget.device.isDiscoveringServices,
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initialData: false,
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builder: (c, snapshot) => IndexedStack(
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index: snapshot.data ? 1 : 0,
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children: <Widget>[
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IconButton(
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icon: Icon(Icons.refresh),
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onPressed: () => widget.device.discoverServices(),
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),
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IconButton(
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icon: SizedBox(
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child: CircularProgressIndicator(
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valueColor: AlwaysStoppedAnimation(Colors.grey),
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),
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width: 18.0,
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height: 18.0,
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),
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onPressed: null,
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)
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],
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),
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),
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),
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),
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StreamBuilder<List<BluetoothService>>(
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stream: widget.device.services,
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initialData: [],
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builder: (c, snapshot) {
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return Column(
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children: _buildServiceTiles(snapshot.data),
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);
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},
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),
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],
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),
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),
|
||||
);
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||||
}
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||||
}
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@@ -0,0 +1,302 @@
|
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// Copyright 2017, Paul DeMarco.
|
||||
// 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:flutter/material.dart';
|
||||
import 'package:flutter_blue/flutter_blue.dart';
|
||||
|
||||
class ScanResultTile extends StatelessWidget {
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const ScanResultTile({Key key, this.result, this.onTap}) : super(key: key);
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final ScanResult result;
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final VoidCallback onTap;
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Widget _buildTitle(BuildContext context) {
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if (result.device.name.length > 0) {
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return Column(
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mainAxisAlignment: MainAxisAlignment.start,
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crossAxisAlignment: CrossAxisAlignment.start,
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children: <Widget>[
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Text(
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result.device.name,
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overflow: TextOverflow.ellipsis,
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),
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Text(
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result.device.id.toString(),
|
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style: Theme.of(context).textTheme.caption,
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||||
)
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||||
],
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||||
);
|
||||
} else {
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return Text(result.device.id.toString());
|
||||
}
|
||||
}
|
||||
|
||||
Widget _buildAdvRow(BuildContext context, String title, String value) {
|
||||
return Padding(
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||||
padding: EdgeInsets.symmetric(horizontal: 16.0, vertical: 4.0),
|
||||
child: Row(
|
||||
crossAxisAlignment: CrossAxisAlignment.start,
|
||||
children: <Widget>[
|
||||
Text(title, style: Theme.of(context).textTheme.caption),
|
||||
SizedBox(
|
||||
width: 12.0,
|
||||
),
|
||||
Expanded(
|
||||
child: Text(
|
||||
value,
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||||
style: Theme.of(context)
|
||||
.textTheme
|
||||
.caption
|
||||
.apply(color: Colors.black),
|
||||
softWrap: true,
|
||||
),
|
||||
),
|
||||
],
|
||||
),
|
||||
);
|
||||
}
|
||||
|
||||
String getNiceHexArray(List<int> bytes) {
|
||||
return '[${bytes.map((i) => i.toRadixString(16).padLeft(2, '0')).join(', ')}]'
|
||||
.toUpperCase();
|
||||
}
|
||||
|
||||
String getNiceManufacturerData(Map<int, List<int>> data) {
|
||||
if (data.isEmpty) {
|
||||
return null;
|
||||
}
|
||||
List<String> res = [];
|
||||
data.forEach((id, bytes) {
|
||||
res.add(
|
||||
'${id.toRadixString(16).toUpperCase()}: ${getNiceHexArray(bytes)}');
|
||||
});
|
||||
return res.join(', ');
|
||||
}
|
||||
|
||||
String getNiceServiceData(Map<String, List<int>> data) {
|
||||
if (data.isEmpty) {
|
||||
return null;
|
||||
}
|
||||
List<String> res = [];
|
||||
data.forEach((id, bytes) {
|
||||
res.add('${id.toUpperCase()}: ${getNiceHexArray(bytes)}');
|
||||
});
|
||||
return res.join(', ');
|
||||
}
|
||||
|
||||
@override
|
||||
Widget build(BuildContext context) {
|
||||
return ExpansionTile(
|
||||
title: _buildTitle(context),
|
||||
leading: Text(result.rssi.toString()),
|
||||
trailing: RaisedButton(
|
||||
child: Text('CONNECT'),
|
||||
color: Colors.black,
|
||||
textColor: Colors.white,
|
||||
onPressed: (result.advertisementData.connectable) ? onTap : null,
|
||||
),
|
||||
children: <Widget>[
|
||||
_buildAdvRow(
|
||||
context, 'Complete Local Name', result.advertisementData.localName),
|
||||
_buildAdvRow(context, 'Tx Power Level',
|
||||
'${result.advertisementData.txPowerLevel ?? 'N/A'}'),
|
||||
_buildAdvRow(
|
||||
context,
|
||||
'Manufacturer Data',
|
||||
getNiceManufacturerData(
|
||||
result.advertisementData.manufacturerData) ??
|
||||
'N/A'),
|
||||
_buildAdvRow(
|
||||
context,
|
||||
'Service UUIDs',
|
||||
(result.advertisementData.serviceUuids.isNotEmpty)
|
||||
? result.advertisementData.serviceUuids.join(', ').toUpperCase()
|
||||
: 'N/A'),
|
||||
_buildAdvRow(context, 'Service Data',
|
||||
getNiceServiceData(result.advertisementData.serviceData) ?? 'N/A'),
|
||||
],
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
class ServiceTile extends StatelessWidget {
|
||||
final BluetoothService service;
|
||||
final List<CharacteristicTile> characteristicTiles;
|
||||
|
||||
const ServiceTile({Key key, this.service, this.characteristicTiles})
|
||||
: super(key: key);
|
||||
|
||||
@override
|
||||
Widget build(BuildContext context) {
|
||||
if (characteristicTiles.length > 0) {
|
||||
return ExpansionTile(
|
||||
title: Column(
|
||||
mainAxisAlignment: MainAxisAlignment.center,
|
||||
crossAxisAlignment: CrossAxisAlignment.start,
|
||||
children: <Widget>[
|
||||
Text('Service'),
|
||||
Text('0x${service.uuid.toString().toUpperCase().substring(4, 8)}',
|
||||
style: Theme.of(context)
|
||||
.textTheme
|
||||
.body1
|
||||
.copyWith(color: Theme.of(context).textTheme.caption.color))
|
||||
],
|
||||
),
|
||||
children: characteristicTiles,
|
||||
);
|
||||
} else {
|
||||
return ListTile(
|
||||
title: Text('Service'),
|
||||
subtitle:
|
||||
Text('0x${service.uuid.toString().toUpperCase().substring(4, 8)}'),
|
||||
);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
class CharacteristicTile extends StatelessWidget {
|
||||
final BluetoothCharacteristic characteristic;
|
||||
final List<DescriptorTile> descriptorTiles;
|
||||
final VoidCallback onReadPressed;
|
||||
final VoidCallback onWritePressed;
|
||||
final VoidCallback onNotificationPressed;
|
||||
|
||||
const CharacteristicTile(
|
||||
{Key key,
|
||||
this.characteristic,
|
||||
this.descriptorTiles,
|
||||
this.onReadPressed,
|
||||
this.onWritePressed,
|
||||
this.onNotificationPressed})
|
||||
: super(key: key);
|
||||
|
||||
@override
|
||||
Widget build(BuildContext context) {
|
||||
return StreamBuilder<List<int>>(
|
||||
stream: characteristic.value,
|
||||
initialData: characteristic.lastValue,
|
||||
builder: (c, snapshot) {
|
||||
final value = snapshot.data;
|
||||
return ExpansionTile(
|
||||
title: ListTile(
|
||||
title: Column(
|
||||
mainAxisAlignment: MainAxisAlignment.center,
|
||||
crossAxisAlignment: CrossAxisAlignment.start,
|
||||
children: <Widget>[
|
||||
Text('Characteristic'),
|
||||
Text(
|
||||
'0x${characteristic.uuid.toString().toUpperCase().substring(4, 8)}',
|
||||
style: Theme.of(context).textTheme.body1.copyWith(
|
||||
color: Theme.of(context).textTheme.caption.color))
|
||||
],
|
||||
),
|
||||
subtitle: Text(value.toString()),
|
||||
contentPadding: EdgeInsets.all(0.0),
|
||||
),
|
||||
trailing: Row(
|
||||
mainAxisSize: MainAxisSize.min,
|
||||
children: <Widget>[
|
||||
IconButton(
|
||||
icon: Icon(
|
||||
Icons.file_download,
|
||||
color: Theme.of(context).iconTheme.color.withOpacity(0.5),
|
||||
),
|
||||
onPressed: onReadPressed,
|
||||
),
|
||||
IconButton(
|
||||
icon: Icon(Icons.file_upload,
|
||||
color: Theme.of(context).iconTheme.color.withOpacity(0.5)),
|
||||
onPressed: onWritePressed,
|
||||
),
|
||||
IconButton(
|
||||
icon: Icon(
|
||||
characteristic.isNotifying
|
||||
? Icons.sync_disabled
|
||||
: Icons.sync,
|
||||
color: Theme.of(context).iconTheme.color.withOpacity(0.5)),
|
||||
onPressed: onNotificationPressed,
|
||||
)
|
||||
],
|
||||
),
|
||||
children: descriptorTiles,
|
||||
);
|
||||
},
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
class DescriptorTile extends StatelessWidget {
|
||||
final BluetoothDescriptor descriptor;
|
||||
final VoidCallback onReadPressed;
|
||||
final VoidCallback onWritePressed;
|
||||
|
||||
const DescriptorTile(
|
||||
{Key key, this.descriptor, this.onReadPressed, this.onWritePressed})
|
||||
: super(key: key);
|
||||
|
||||
@override
|
||||
Widget build(BuildContext context) {
|
||||
return ListTile(
|
||||
title: Column(
|
||||
mainAxisAlignment: MainAxisAlignment.center,
|
||||
crossAxisAlignment: CrossAxisAlignment.start,
|
||||
children: <Widget>[
|
||||
Text('Descriptor'),
|
||||
Text('0x${descriptor.uuid.toString().toUpperCase().substring(4, 8)}',
|
||||
style: Theme.of(context)
|
||||
.textTheme
|
||||
.body1
|
||||
.copyWith(color: Theme.of(context).textTheme.caption.color))
|
||||
],
|
||||
),
|
||||
subtitle: StreamBuilder<List<int>>(
|
||||
stream: descriptor.value,
|
||||
initialData: descriptor.lastValue,
|
||||
builder: (c, snapshot) => Text(snapshot.data.toString()),
|
||||
),
|
||||
trailing: Row(
|
||||
mainAxisSize: MainAxisSize.min,
|
||||
children: <Widget>[
|
||||
IconButton(
|
||||
icon: Icon(
|
||||
Icons.file_download,
|
||||
color: Theme.of(context).iconTheme.color.withOpacity(0.5),
|
||||
),
|
||||
onPressed: onReadPressed,
|
||||
),
|
||||
IconButton(
|
||||
icon: Icon(
|
||||
Icons.file_upload,
|
||||
color: Theme.of(context).iconTheme.color.withOpacity(0.5),
|
||||
),
|
||||
onPressed: onWritePressed,
|
||||
)
|
||||
],
|
||||
),
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
class AdapterStateTile extends StatelessWidget {
|
||||
const AdapterStateTile({Key key, @required this.state}) : super(key: key);
|
||||
|
||||
final BluetoothState state;
|
||||
|
||||
@override
|
||||
Widget build(BuildContext context) {
|
||||
return Container(
|
||||
color: Colors.redAccent,
|
||||
child: ListTile(
|
||||
title: Text(
|
||||
'Bluetooth adapter is ${state.toString().substring(15)}',
|
||||
style: Theme.of(context).primaryTextTheme.subhead,
|
||||
),
|
||||
trailing: Icon(
|
||||
Icons.error,
|
||||
color: Theme.of(context).primaryTextTheme.subhead.color,
|
||||
),
|
||||
),
|
||||
);
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user