Add All the files from the touchpad_demonstrator Flutter App which can be build for Android and iOS
This commit is contained in:
Richard Stern
+328
@@ -0,0 +1,328 @@
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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/material.dart';
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import 'package:flutter_blue/flutter_blue.dart';
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import 'package:flutter_blue_example/widgets.dart';
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void main() {
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runApp(new FlutterBlueApp());
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}
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class FlutterBlueApp extends StatefulWidget {
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FlutterBlueApp({Key key, this.title}) : super(key: key);
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final String title;
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@override
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_FlutterBlueAppState createState() => new _FlutterBlueAppState();
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}
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class _FlutterBlueAppState extends State<FlutterBlueApp> {
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FlutterBlue _flutterBlue = FlutterBlue.instance;
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/// Scanning
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StreamSubscription _scanSubscription;
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Map<DeviceIdentifier, ScanResult> scanResults = new Map();
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bool isScanning = false;
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/// State
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StreamSubscription _stateSubscription;
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BluetoothState state = BluetoothState.unknown;
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/// Device
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BluetoothDevice device;
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bool get isConnected => (device != null);
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StreamSubscription deviceConnection;
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StreamSubscription deviceStateSubscription;
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List<BluetoothService> services = new List();
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Map<Guid, StreamSubscription> valueChangedSubscriptions = {};
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BluetoothDeviceState deviceState = BluetoothDeviceState.disconnected;
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@override
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void initState() {
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super.initState();
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// Immediately get the state of FlutterBlue
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_flutterBlue.state.then((s) {
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setState(() {
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state = s;
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});
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});
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// Subscribe to state changes
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_stateSubscription = _flutterBlue.onStateChanged().listen((s) {
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setState(() {
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state = s;
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});
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});
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}
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@override
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void dispose() {
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_stateSubscription?.cancel();
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_stateSubscription = null;
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_scanSubscription?.cancel();
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_scanSubscription = null;
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deviceConnection?.cancel();
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deviceConnection = null;
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super.dispose();
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}
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_startScan() {
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_scanSubscription = _flutterBlue
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.scan(
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timeout: const Duration(seconds: 5),
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/*withServices: [
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new Guid('0000180F-0000-1000-8000-00805F9B34FB')
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]*/
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)
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.listen((scanResult) {
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print('localName: ${scanResult.advertisementData.localName}');
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print(
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'manufacturerData: ${scanResult.advertisementData.manufacturerData}');
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print('serviceData: ${scanResult.advertisementData.serviceData}');
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setState(() {
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scanResults[scanResult.device.id] = scanResult;
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});
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}, onDone: _stopScan);
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setState(() {
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isScanning = true;
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});
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}
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_stopScan() {
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_scanSubscription?.cancel();
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_scanSubscription = null;
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setState(() {
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isScanning = false;
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});
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}
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_connect(BluetoothDevice d) async {
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device = d;
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// Connect to device
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deviceConnection = _flutterBlue
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.connect(device, timeout: const Duration(seconds: 4))
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.listen(
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null,
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onDone: _disconnect,
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);
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// Update the connection state immediately
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device.state.then((s) {
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setState(() {
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deviceState = s;
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});
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});
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// Subscribe to connection changes
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deviceStateSubscription = device.onStateChanged().listen((s) {
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setState(() {
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deviceState = s;
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});
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if (s == BluetoothDeviceState.connected) {
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device.discoverServices().then((s) {
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setState(() {
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services = s;
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});
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});
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}
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});
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}
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_disconnect() {
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// Remove all value changed listeners
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valueChangedSubscriptions.forEach((uuid, sub) => sub.cancel());
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valueChangedSubscriptions.clear();
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deviceStateSubscription?.cancel();
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deviceStateSubscription = null;
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deviceConnection?.cancel();
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deviceConnection = null;
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setState(() {
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device = null;
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});
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}
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_readCharacteristic(BluetoothCharacteristic c) async {
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await device.readCharacteristic(c);
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setState(() {});
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}
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_writeCharacteristic(BluetoothCharacteristic c) async {
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await device.writeCharacteristic(c, [0x12, 0x34],
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type: CharacteristicWriteType.withResponse);
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setState(() {});
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}
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_readDescriptor(BluetoothDescriptor d) async {
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await device.readDescriptor(d);
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setState(() {});
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}
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_writeDescriptor(BluetoothDescriptor d) async {
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await device.writeDescriptor(d, [0x12, 0x34]);
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setState(() {});
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}
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_setNotification(BluetoothCharacteristic c) async {
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if (c.isNotifying) {
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await device.setNotifyValue(c, false);
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// Cancel subscription
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valueChangedSubscriptions[c.uuid]?.cancel();
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valueChangedSubscriptions.remove(c.uuid);
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} else {
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await device.setNotifyValue(c, true);
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// ignore: cancel_subscriptions
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final sub = device.onValueChanged(c).listen((d) {
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setState(() {
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print('onValueChanged $d');
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});
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});
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// Add to map
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valueChangedSubscriptions[c.uuid] = sub;
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}
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setState(() {});
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}
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_refreshDeviceState(BluetoothDevice d) async {
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var state = await d.state;
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setState(() {
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deviceState = state;
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print('State refreshed: $deviceState');
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});
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}
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_buildScanningButton() {
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if (isConnected || state != BluetoothState.on) {
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return null;
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}
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if (isScanning) {
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return new FloatingActionButton(
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child: new Icon(Icons.stop),
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onPressed: _stopScan,
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backgroundColor: Colors.red,
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);
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} else {
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return new FloatingActionButton(
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child: new Icon(Icons.search), onPressed: _startScan);
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}
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}
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_buildScanResultTiles() {
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return scanResults.values
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.map((r) => ScanResultTile(
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result: r,
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onTap: () => _connect(r.device),
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))
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.toList();
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}
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List<Widget> _buildServiceTiles() {
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return services
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.map(
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(s) => new ServiceTile(
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service: s,
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characteristicTiles: s.characteristics
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.map(
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(c) => new CharacteristicTile(
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characteristic: c,
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onReadPressed: () => _readCharacteristic(c),
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onWritePressed: () => _writeCharacteristic(c),
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onNotificationPressed: () => _setNotification(c),
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descriptorTiles: c.descriptors
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.map(
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(d) => new DescriptorTile(
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descriptor: d,
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onReadPressed: () => _readDescriptor(d),
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onWritePressed: () =>
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_writeDescriptor(d),
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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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_buildActionButtons() {
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if (isConnected) {
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return <Widget>[
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new IconButton(
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icon: const Icon(Icons.cancel),
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onPressed: () => _disconnect(),
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)
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];
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}
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}
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_buildAlertTile() {
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return new Container(
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color: Colors.redAccent,
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child: new ListTile(
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title: new Text(
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'Bluetooth adapter is ${state.toString().substring(15)}',
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style: Theme.of(context).primaryTextTheme.subhead,
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),
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trailing: new Icon(
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Icons.error,
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color: Theme.of(context).primaryTextTheme.subhead.color,
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),
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),
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);
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}
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_buildDeviceStateTile() {
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return new ListTile(
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leading: (deviceState == BluetoothDeviceState.connected)
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? const Icon(Icons.bluetooth_connected)
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: const Icon(Icons.bluetooth_disabled),
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title: new Text('Device is ${deviceState.toString().split('.')[1]}.'),
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subtitle: new Text('${device.id}'),
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trailing: new IconButton(
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icon: const Icon(Icons.refresh),
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onPressed: () => _refreshDeviceState(device),
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color: Theme.of(context).iconTheme.color.withOpacity(0.5),
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));
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}
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_buildProgressBarTile() {
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return new LinearProgressIndicator();
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}
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@override
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Widget build(BuildContext context) {
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var tiles = new List<Widget>();
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if (state != BluetoothState.on) {
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tiles.add(_buildAlertTile());
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}
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if (isConnected) {
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tiles.add(_buildDeviceStateTile());
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tiles.addAll(_buildServiceTiles());
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} else {
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tiles.addAll(_buildScanResultTiles());
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}
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return new MaterialApp(
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home: new Scaffold(
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appBar: new AppBar(
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title: const Text('FlutterBlue'),
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actions: _buildActionButtons(),
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),
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floatingActionButton: _buildScanningButton(),
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body: new Stack(
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children: <Widget>[
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(isScanning) ? _buildProgressBarTile() : new Container(),
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new ListView(
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children: tiles,
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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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+280
@@ -0,0 +1,280 @@
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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 'package:flutter/material.dart';
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import 'package:flutter_blue/flutter_blue.dart';
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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(result.device.name),
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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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);
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} else {
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return Text(result.device.id.toString());
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}
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}
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Widget _buildAdvRow(BuildContext context, String title, String value) {
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return Padding(
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padding: const EdgeInsets.symmetric(horizontal: 16.0, vertical: 4.0),
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child: Row(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: <Widget>[
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Text(title, style: Theme.of(context).textTheme.caption),
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SizedBox(
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width: 12.0,
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),
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Expanded(
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child: Text(
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value,
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style: Theme.of(context)
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.textTheme
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.caption
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.apply(color: Colors.black),
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softWrap: true,
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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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String getNiceHexArray(List<int> bytes) {
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return '[${bytes.map((i) => i.toRadixString(16).padLeft(2, '0')).join(', ')}]'
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.toUpperCase();
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}
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String getNiceManufacturerData(Map<int, List<int>> data) {
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if (data.isEmpty) {
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return null;
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}
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List<String> res = [];
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data.forEach((id, bytes) {
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res.add(
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'${id.toRadixString(16).toUpperCase()}: ${getNiceHexArray(bytes)}');
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});
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return res.join(', ');
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}
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String getNiceServiceData(Map<String, List<int>> data) {
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if (data.isEmpty) {
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return null;
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}
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List<String> res = [];
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data.forEach((id, bytes) {
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res.add('${id.toUpperCase()}: ${getNiceHexArray(bytes)}');
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});
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return res.join(', ');
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}
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@override
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Widget build(BuildContext context) {
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return ExpansionTile(
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title: _buildTitle(context),
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leading: Text(result.rssi.toString()),
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trailing: RaisedButton(
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child: Text('CONNECT'),
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color: Colors.black,
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textColor: Colors.white,
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onPressed: (result.advertisementData.connectable) ? onTap : null,
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),
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children: <Widget>[
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_buildAdvRow(
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context, 'Complete Local Name', result.advertisementData.localName),
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_buildAdvRow(context, 'Tx Power Level',
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'${result.advertisementData.txPowerLevel ?? 'N/A'}'),
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_buildAdvRow(
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context,
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'Manufacturer Data',
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getNiceManufacturerData(
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result.advertisementData.manufacturerData) ??
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'N/A'),
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_buildAdvRow(
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context,
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'Service UUIDs',
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(result.advertisementData.serviceUuids.isNotEmpty)
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? result.advertisementData.serviceUuids.join(', ').toUpperCase()
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: 'N/A'),
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_buildAdvRow(context, 'Service Data',
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getNiceServiceData(result.advertisementData.serviceData) ?? 'N/A'),
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],
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);
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}
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}
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class ServiceTile extends StatelessWidget {
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final BluetoothService service;
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final List<CharacteristicTile> characteristicTiles;
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const ServiceTile({Key key, this.service, this.characteristicTiles})
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: super(key: key);
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@override
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Widget build(BuildContext context) {
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if (characteristicTiles.length > 0) {
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return new ExpansionTile(
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title: new Column(
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mainAxisAlignment: MainAxisAlignment.center,
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crossAxisAlignment: CrossAxisAlignment.start,
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children: <Widget>[
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const Text('Service'),
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new Text(
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'0x${service.uuid.toString().toUpperCase().substring(4, 8)}',
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style: Theme.of(context)
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.textTheme
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||||
.body1
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.copyWith(color: Theme.of(context).textTheme.caption.color))
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],
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),
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children: characteristicTiles,
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);
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} else {
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return new ListTile(
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title: const Text('Service'),
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subtitle: new Text(
|
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'0x${service.uuid.toString().toUpperCase().substring(4, 8)}'),
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);
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||||
}
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||||
}
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||||
}
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class CharacteristicTile extends StatelessWidget {
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final BluetoothCharacteristic characteristic;
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final List<DescriptorTile> descriptorTiles;
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final VoidCallback onReadPressed;
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||||
final VoidCallback onWritePressed;
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final VoidCallback onNotificationPressed;
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||||
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const CharacteristicTile(
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{Key key,
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this.characteristic,
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this.descriptorTiles,
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this.onReadPressed,
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this.onWritePressed,
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this.onNotificationPressed})
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: super(key: key);
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||||
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||||
@override
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Widget build(BuildContext context) {
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||||
var actions = new Row(
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||||
mainAxisSize: MainAxisSize.min,
|
||||
children: <Widget>[
|
||||
new IconButton(
|
||||
icon: new Icon(
|
||||
Icons.file_download,
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||||
color: Theme.of(context).iconTheme.color.withOpacity(0.5),
|
||||
),
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||||
onPressed: onReadPressed,
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||||
),
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||||
new IconButton(
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||||
icon: new Icon(Icons.file_upload,
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||||
color: Theme.of(context).iconTheme.color.withOpacity(0.5)),
|
||||
onPressed: onWritePressed,
|
||||
),
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||||
new IconButton(
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||||
icon: new Icon(
|
||||
characteristic.isNotifying ? Icons.sync_disabled : Icons.sync,
|
||||
color: Theme.of(context).iconTheme.color.withOpacity(0.5)),
|
||||
onPressed: onNotificationPressed,
|
||||
)
|
||||
],
|
||||
);
|
||||
|
||||
var title = new Column(
|
||||
mainAxisAlignment: MainAxisAlignment.center,
|
||||
crossAxisAlignment: CrossAxisAlignment.start,
|
||||
children: <Widget>[
|
||||
const Text('Characteristic'),
|
||||
new Text(
|
||||
'0x${characteristic.uuid.toString().toUpperCase().substring(4, 8)}',
|
||||
style: Theme.of(context)
|
||||
.textTheme
|
||||
.body1
|
||||
.copyWith(color: Theme.of(context).textTheme.caption.color))
|
||||
],
|
||||
);
|
||||
|
||||
if (descriptorTiles.length > 0) {
|
||||
return new ExpansionTile(
|
||||
title: new ListTile(
|
||||
title: title,
|
||||
subtitle: new Text(characteristic.value.toString()),
|
||||
contentPadding: EdgeInsets.all(0.0),
|
||||
),
|
||||
trailing: actions,
|
||||
children: descriptorTiles,
|
||||
);
|
||||
} else {
|
||||
return new ListTile(
|
||||
title: title,
|
||||
subtitle: new Text(characteristic.value.toString()),
|
||||
trailing: actions,
|
||||
);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
class DescriptorTile extends StatelessWidget {
|
||||
final BluetoothDescriptor descriptor;
|
||||
final VoidCallback onReadPressed;
|
||||
final VoidCallback onWritePressed;
|
||||
|
||||
const DescriptorTile(
|
||||
{Key key, this.descriptor, this.onReadPressed, this.onWritePressed})
|
||||
: super(key: key);
|
||||
|
||||
@override
|
||||
Widget build(BuildContext context) {
|
||||
var title = new Column(
|
||||
mainAxisAlignment: MainAxisAlignment.center,
|
||||
crossAxisAlignment: CrossAxisAlignment.start,
|
||||
children: <Widget>[
|
||||
const Text('Descriptor'),
|
||||
new Text(
|
||||
'0x${descriptor.uuid.toString().toUpperCase().substring(4, 8)}',
|
||||
style: Theme.of(context)
|
||||
.textTheme
|
||||
.body1
|
||||
.copyWith(color: Theme.of(context).textTheme.caption.color))
|
||||
],
|
||||
);
|
||||
return new ListTile(
|
||||
title: title,
|
||||
subtitle: new Text(descriptor.value.toString()),
|
||||
trailing: new Row(
|
||||
mainAxisSize: MainAxisSize.min,
|
||||
children: <Widget>[
|
||||
new IconButton(
|
||||
icon: new Icon(
|
||||
Icons.file_download,
|
||||
color: Theme.of(context).iconTheme.color.withOpacity(0.5),
|
||||
),
|
||||
onPressed: onReadPressed,
|
||||
),
|
||||
new IconButton(
|
||||
icon: new Icon(
|
||||
Icons.file_upload,
|
||||
color: Theme.of(context).iconTheme.color.withOpacity(0.5),
|
||||
),
|
||||
onPressed: onWritePressed,
|
||||
)
|
||||
],
|
||||
),
|
||||
);
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user