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ESP32 | FLUTER | BLE | Local Notifications
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Eric
@@ -0,0 +1,302 @@
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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(
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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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);
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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: 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 ExpansionTile(
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title: 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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Text('Service'),
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Text('0x${service.uuid.toString().toUpperCase().substring(4, 8)}',
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style: Theme.of(context)
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.textTheme
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.body1
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.copyWith(color: Theme.of(context).textTheme.caption.color))
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],
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),
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children: characteristicTiles,
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);
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} else {
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return ListTile(
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title: Text('Service'),
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subtitle:
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Text('0x${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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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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@override
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Widget build(BuildContext context) {
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return StreamBuilder<List<int>>(
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stream: characteristic.value,
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initialData: characteristic.lastValue,
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builder: (c, snapshot) {
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final value = snapshot.data;
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return ExpansionTile(
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title: ListTile(
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title: 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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Text('Characteristic'),
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Text(
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'0x${characteristic.uuid.toString().toUpperCase().substring(4, 8)}',
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style: Theme.of(context).textTheme.body1.copyWith(
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color: Theme.of(context).textTheme.caption.color))
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],
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),
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subtitle: Text(value.toString()),
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contentPadding: EdgeInsets.all(0.0),
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),
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trailing: Row(
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mainAxisSize: MainAxisSize.min,
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children: <Widget>[
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IconButton(
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icon: Icon(
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Icons.file_download,
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color: Theme.of(context).iconTheme.color.withOpacity(0.5),
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),
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onPressed: onReadPressed,
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),
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IconButton(
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icon: Icon(Icons.file_upload,
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color: Theme.of(context).iconTheme.color.withOpacity(0.5)),
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onPressed: onWritePressed,
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),
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IconButton(
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icon: Icon(
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characteristic.isNotifying
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? Icons.sync_disabled
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: Icons.sync,
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color: Theme.of(context).iconTheme.color.withOpacity(0.5)),
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onPressed: onNotificationPressed,
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)
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],
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),
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children: descriptorTiles,
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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 DescriptorTile extends StatelessWidget {
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final BluetoothDescriptor descriptor;
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final VoidCallback onReadPressed;
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final VoidCallback onWritePressed;
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const DescriptorTile(
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{Key key, this.descriptor, this.onReadPressed, this.onWritePressed})
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: super(key: key);
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@override
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Widget build(BuildContext context) {
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return ListTile(
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title: 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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Text('Descriptor'),
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Text('0x${descriptor.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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subtitle: StreamBuilder<List<int>>(
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stream: descriptor.value,
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initialData: descriptor.lastValue,
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builder: (c, snapshot) => Text(snapshot.data.toString()),
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),
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trailing: Row(
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mainAxisSize: MainAxisSize.min,
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children: <Widget>[
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IconButton(
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icon: Icon(
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Icons.file_download,
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color: Theme.of(context).iconTheme.color.withOpacity(0.5),
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),
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onPressed: onReadPressed,
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),
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IconButton(
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icon: Icon(
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Icons.file_upload,
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color: Theme.of(context).iconTheme.color.withOpacity(0.5),
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),
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onPressed: onWritePressed,
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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 AdapterStateTile extends StatelessWidget {
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const AdapterStateTile({Key key, @required 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 Container(
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color: Colors.redAccent,
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child: ListTile(
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title: 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: 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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}
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