flutter_blue_elves 0.1.9 
flutter_blue_elves: ^0.1.9 copied to clipboard
A flutter plugin for bluetooth ble device connect and control.
import 'dart:async';
import 'package:flutter/material.dart';
import 'package:flutter_blue_elves/flutter_blue_elves.dart';
import 'device_control.dart';
import 'dart:io';
void main() {
runApp(const MaterialApp(home: MyApp()));
}
class MyApp extends StatefulWidget {
const MyApp({Key? key}) : super(key: key);
@override
State<MyApp> createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
List<AndroidBluetoothLack> _blueLack = [];
IosBluetoothState _iosBlueState = IosBluetoothState.unKnown;
List<ScanResult> _scanResultList = [];
List<HideConnectedDevice> _hideConnectedList = [];
final List<_ConnectedItem> _connectedList = [];
bool _isScaning = false;
@override
void initState() {
super.initState();
Timer.periodic(const Duration(milliseconds: 2000),
Platform.isAndroid ? androidGetBlueLack : iosGetBlueState);
getHideConnectedDevice();
}
void iosGetBlueState(timer) {
FlutterBlueElves.instance.iosCheckBluetoothState().then((value) {
setState(() {
_iosBlueState = value;
});
});
}
void androidGetBlueLack(timer) {
FlutterBlueElves.instance.androidCheckBlueLackWhat().then((values) {
setState(() {
_blueLack = values;
});
});
}
void getHideConnectedDevice() {
FlutterBlueElves.instance.getHideConnectedDevices().then((values) {
setState(() {
_hideConnectedList = values;
});
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
toolbarHeight: Platform.isAndroid ? 100 : null,
centerTitle: true,
title: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: Platform.isAndroid
? [
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
TextButton.icon(
style: TextButton.styleFrom(
backgroundColor: _blueLack.contains(
AndroidBluetoothLack.locationPermission)
? Colors.red
: Colors.green,
),
icon: Icon(_blueLack.contains(
AndroidBluetoothLack.locationPermission)
? Icons.error
: Icons.done),
label: const Text("GPS Permission",
style: TextStyle(color: Colors.black)),
onPressed: () {
if (_blueLack.contains(
AndroidBluetoothLack.locationPermission)) {
FlutterBlueElves.instance
.androidApplyLocationPermission((isOk) {
print(isOk
? "User agrees to grant location permission"
: "User does not agree to grant location permission");
});
}
},
),
TextButton.icon(
style: TextButton.styleFrom(
backgroundColor: _blueLack.contains(
AndroidBluetoothLack.locationFunction)
? Colors.red
: Colors.green,
),
icon: Icon(_blueLack.contains(
AndroidBluetoothLack.locationFunction)
? Icons.error
: Icons.done),
label: const Text(
"GPS",
style: TextStyle(color: Colors.black),
),
onPressed: () {
if (_blueLack.contains(
AndroidBluetoothLack.locationFunction)) {
FlutterBlueElves.instance
.androidOpenLocationService((isOk) {
print(isOk
? "The user agrees to turn on the positioning function"
: "The user does not agree to enable the positioning function");
});
}
},
),
]),
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
TextButton.icon(
style: TextButton.styleFrom(
backgroundColor: _blueLack.contains(
AndroidBluetoothLack.bluetoothPermission)
? Colors.red
: Colors.green,
),
icon: Icon(_blueLack.contains(
AndroidBluetoothLack.bluetoothPermission)
? Icons.error
: Icons.done),
label: const Text("Blue Permission",
style: TextStyle(color: Colors.black)),
onPressed: () {
if (_blueLack.contains(
AndroidBluetoothLack.bluetoothPermission)) {
FlutterBlueElves.instance
.androidApplyBluetoothPermission((isOk) {
print(isOk
? "User agrees to grant Bluetooth permission"
: "User does not agree to grant Bluetooth permission");
});
}
},
),
TextButton.icon(
style: TextButton.styleFrom(
backgroundColor: _blueLack.contains(
AndroidBluetoothLack.bluetoothFunction)
? Colors.red
: Colors.green,
),
icon: Icon(_blueLack.contains(
AndroidBluetoothLack.bluetoothFunction)
? Icons.error
: Icons.done),
label: const Text(
"Blue",
style: TextStyle(color: Colors.black),
),
onPressed: () {
if (_blueLack.contains(
AndroidBluetoothLack.bluetoothFunction)) {
FlutterBlueElves.instance
.androidOpenBluetoothService((isOk) {
print(isOk
? "The user agrees to turn on the Bluetooth function"
: "The user does not agree to enable the Bluetooth function");
});
}
},
),
])
]
: [
TextButton.icon(
style: TextButton.styleFrom(
backgroundColor:
_iosBlueState == IosBluetoothState.poweredOn
? Colors.green
: Colors.red),
icon: Icon(_iosBlueState == IosBluetoothState.poweredOn
? Icons.done
: Icons.error),
label: Text(
"BlueToothState:" +
_iosBlueState
.toString()
.replaceAll(RegExp("IosBluetoothState."), ""),
style: const TextStyle(color: Colors.black)),
onPressed: () {
if (_iosBlueState == IosBluetoothState.unKnown) {
showDialog<void>(
context: context,
builder: (BuildContext dialogContext) {
return AlertDialog(
title: const Text("Tip"),
content: Text(
"Bluetooth is not initialized, please wait"),
actions: <Widget>[
TextButton(
child: Text("close"),
onPressed: () => Navigator.of(context).pop(),
),
],
);
},
);
} else if (_iosBlueState == IosBluetoothState.resetting) {
showDialog<void>(
context: context,
builder: (BuildContext dialogContext) {
return AlertDialog(
title: Text("Tip"),
content:
Text("Bluetooth is resetting, please wait"),
actions: <Widget>[
TextButton(
child: Text("close"),
onPressed: () => Navigator.of(context).pop(),
),
],
);
},
);
} else if (_iosBlueState == IosBluetoothState.unSupport) {
showDialog<void>(
context: context,
builder: (BuildContext dialogContext) {
return AlertDialog(
title: Text("Tip"),
content: Text(
"The current device does not support Bluetooth, please check"),
actions: <Widget>[
TextButton(
child: Text("close"),
onPressed: () => Navigator.of(context).pop(),
),
],
);
},
);
} else if (_iosBlueState ==
IosBluetoothState.unAuthorized) {
showDialog<void>(
context: context,
builder: (BuildContext dialogContext) {
return AlertDialog(
title: Text("Tip"),
content: Text(
"The current app does not have Bluetooth permission, please go to the settings to grant"),
actions: <Widget>[
TextButton(
child: Text("close"),
onPressed: () => Navigator.of(context).pop(),
),
],
);
},
);
} else if (_iosBlueState ==
IosBluetoothState.poweredOff) {
showDialog<void>(
context: context,
builder: (BuildContext dialogContext) {
return AlertDialog(
title: Text("Tip"),
content: Text(
"Bluetooth is not currently turned on, please check"),
actions: <Widget>[
TextButton(
child: Text("close"),
onPressed: () => Navigator.of(context).pop(),
),
],
);
},
);
}
},
),
],
),
),
body: ListView.separated(
itemCount: (_connectedList.isNotEmpty ? _connectedList.length + 1 : 0) +
(_hideConnectedList.isNotEmpty
? _hideConnectedList.length + 1
: 0) +
(_scanResultList.isNotEmpty ? _scanResultList.length + 1 : 0),
itemBuilder: (BuildContext context, int index) {
if (_connectedList.isNotEmpty && index <= _connectedList.length) {
if (index == 0) {
return const Text("Connected device",
style: TextStyle(
color: Colors.black,
fontSize: 16,
fontWeight: FontWeight.bold));
} else {
_ConnectedItem currentConnected = _connectedList[index - 1];
return Padding(
padding: const EdgeInsets.fromLTRB(16, 4, 16, 4),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Expanded(
flex: 6,
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(currentConnected._name ?? "Unnamed device",
style: const TextStyle(
color: Colors.black, fontSize: 16)),
Text(
currentConnected._macAddress ??
"Unable to get mac address",
style: const TextStyle(
color: Colors.black, fontSize: 12)),
StreamBuilder<int>(
initialData: currentConnected._device.rssi,
stream: currentConnected._device.rssiStream,
builder: (BuildContext context,
AsyncSnapshot<int> snapshot) {
return Text(
(snapshot.connectionState ==
ConnectionState.active
? snapshot.data.toString()
: currentConnected._device.rssi
.toString()) +
"dBm",
style: const TextStyle(
color: Colors.lightGreen,
fontSize: 12));
})
],
),
),
Expanded(
flex: 4,
child: Column(children: [
StreamBuilder<DeviceState>(
initialData: DeviceState.connected,
stream: currentConnected._device.stateStream,
builder: (BuildContext context,
AsyncSnapshot<DeviceState> snapshot) {
DeviceState? currentState =
snapshot.connectionState ==
ConnectionState.active
? snapshot.data
: currentConnected._device.state;
if (currentState == DeviceState.connected &&
!currentConnected._device.isWatchingRssi)
currentConnected._device.startWatchRssi();
return ElevatedButton(
child: Text(
currentState == DeviceState.connected
? "Disconnect"
: "Connect"),
onPressed: () {
if (currentState == DeviceState.connected) {
currentConnected._device.disConnect();
} else {
currentConnected._device
.connect(connectTimeout: 10000);
}
},
);
}),
ElevatedButton(
child: const Text("destroy"),
onPressed: () {
currentConnected._device.destroy();
setState(() {
_connectedList.removeAt(index - 1);
});
},
),
ElevatedButton(
child: const Text("To tap"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) {
return DeviceControl(
currentConnected._name,
currentConnected._macAddress,
currentConnected._device);
},
),
);
},
)
]),
),
],
),
);
}
} else if (_hideConnectedList.isNotEmpty &&
index -
(_connectedList.isNotEmpty
? _connectedList.length + 1
: 0) <=
_hideConnectedList.length) {
int hideStartIndex =
_connectedList.isNotEmpty ? _connectedList.length + 1 : 0;
if (index == hideStartIndex) {
return const Text("HideConnected",
style: TextStyle(
color: Colors.black,
fontSize: 16,
fontWeight: FontWeight.bold));
} else {
HideConnectedDevice currentHide =
_hideConnectedList[index - hideStartIndex - 1];
return Padding(
padding: const EdgeInsets.fromLTRB(16, 4, 16, 4),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Expanded(
flex: 7,
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(currentHide.name ?? "Unnamed device",
style: const TextStyle(
color: Colors.black, fontSize: 16)),
Text(
currentHide.uuids.length.toString() +
" Service Advertised",
style: const TextStyle(
color: Colors.grey, fontSize: 12)),
Text(
currentHide.macAddress ??
"Unable to get mac address",
style: const TextStyle(
color: Colors.black, fontSize: 12)),
],
)),
Expanded(
flex: 3,
child: Column(
children: [
ElevatedButton(
onPressed: () {
Device toConnectDevice = currentHide
.connect(connectTimeout: 10000);
setState(() {
_connectedList.insert(
0,
_ConnectedItem(
toConnectDevice,
currentHide.macAddress,
currentHide.name));
_hideConnectedList
.removeAt(index - hideStartIndex - 1);
});
Navigator.push(
context,
MaterialPageRoute(
builder: (context) {
return DeviceControl(
currentHide.name,
currentHide.macAddress,
toConnectDevice);
},
),
);
},
child: const Text("Connect"))
],
)),
]),
);
}
} else {
int scanStartIndex =
(_connectedList.isNotEmpty ? _connectedList.length + 1 : 0) +
(_hideConnectedList.isNotEmpty
? _hideConnectedList.length + 1
: 0);
if (index == scanStartIndex) {
return const Text("Scan Results",
style: TextStyle(
color: Colors.black,
fontSize: 16,
fontWeight: FontWeight.bold));
} else {
ScanResult currentScan =
_scanResultList[index - scanStartIndex - 1];
return Padding(
padding: const EdgeInsets.fromLTRB(16, 4, 16, 4),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Expanded(
flex: 7,
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(currentScan.name ?? "Unnamed device",
style: const TextStyle(
color: Colors.black, fontSize: 16)),
Text(
currentScan.uuids.length.toString() +
" Service Advertised",
style: const TextStyle(
color: Colors.grey, fontSize: 12)),
Text(
currentScan.macAddress ??
"Unable to get mac address",
style: const TextStyle(
color: Colors.black, fontSize: 12)),
currentScan.localName == null
? const Padding(
padding: EdgeInsets.fromLTRB(0, 0, 0, 0),
)
: Column(
crossAxisAlignment:
CrossAxisAlignment.start,
children: [
const Text("LocalName:",
style: TextStyle(
color: Colors.grey,
fontSize: 12)),
Text(currentScan.localName!,
style: const TextStyle(
color: Colors.black,
fontSize: 14))
],
),
currentScan.manufacturerSpecificData == null
? const Padding(
padding: EdgeInsets.fromLTRB(0, 0, 0, 0),
)
: const Text("ManufacturerData:",
style: TextStyle(
color: Colors.grey, fontSize: 12)),
currentScan.manufacturerSpecificData == null
? const Padding(
padding: EdgeInsets.fromLTRB(0, 0, 0, 0),
)
: Column(
children: currentScan
.manufacturerSpecificData!.entries
.map((entry) {
String data = "";
for (int byte in entry.value) {
String byteStr = byte.toRadixString(16);
data += byteStr.length > 1
? byteStr
: ("0" + byteStr);
data += ",";
}
data = data.replaceRange(
data.length - 1, null, "");
data = "[" + data + "]";
int keyInt = entry.key;
String keyStr = keyInt.toRadixString(16);
return Text(keyStr + ":" + data,
style: const TextStyle(
color: Colors.black, fontSize: 12));
}).toList()),
currentScan.row == null
? const Padding(
padding: EdgeInsets.fromLTRB(0, 0, 0, 0),
)
: Column(
crossAxisAlignment:
CrossAxisAlignment.start,
children: [
const Text("Row:",
style: TextStyle(
color: Colors.grey,
fontSize: 12)),
Text((currentScan.row!
.map((byte) {
String byteStr =
byte.toRadixString(16);
return byteStr.length > 1
? byteStr
: "0" + byteStr;
})
.toList()
.toString()))
],
)
],
),
),
Expanded(
flex: 3,
child: Column(
children: [
ElevatedButton(
onPressed: () {
Device toConnectDevice = currentScan.connect(
connectTimeout: 10000);
setState(() {
_connectedList.insert(
0,
_ConnectedItem(
toConnectDevice,
currentScan.macAddress,
currentScan.name));
_scanResultList
.removeAt(index - scanStartIndex - 1);
});
Navigator.push(
context,
MaterialPageRoute(
builder: (context) {
return DeviceControl(
currentScan.name,
currentScan.macAddress,
toConnectDevice);
},
),
);
},
child: const Text("Connect")),
Text(currentScan.rssi.toString() + " dBm",
style: const TextStyle(
color: Colors.lightGreen, fontSize: 12))
],
),
)
],
));
}
}
},
separatorBuilder: (BuildContext context, int index) {
if (_connectedList.isNotEmpty && index <= _connectedList.length) {
if (index == 0 || index == _connectedList.length) {
return const Divider(color: Colors.white);
} else {
return const Divider(color: Colors.grey);
}
} else if (_hideConnectedList.isNotEmpty &&
index -
(_connectedList.isNotEmpty
? _connectedList.length + 1
: 0) <=
_hideConnectedList.length) {
int hideStartIndex =
_connectedList.isNotEmpty ? _connectedList.length + 1 : 0;
if (index == hideStartIndex ||
index == hideStartIndex + _hideConnectedList.length) {
return const Divider(color: Colors.white);
} else {
return const Divider(color: Colors.grey);
}
} else {
int scanStartIndex =
(_connectedList.isNotEmpty ? _connectedList.length + 1 : 0) +
(_hideConnectedList.isNotEmpty
? _hideConnectedList.length + 1
: 0);
if (index == scanStartIndex ||
index == scanStartIndex + _scanResultList.length) {
return const Divider(color: Colors.white);
} else {
return const Divider(color: Colors.grey);
}
}
},
),
floatingActionButton: FloatingActionButton(
backgroundColor: _isScaning ? Colors.red : Colors.blue,
onPressed: () {
getHideConnectedDevice();
if ((Platform.isAndroid && _blueLack.isEmpty) ||
(Platform.isIOS &&
_iosBlueState == IosBluetoothState.poweredOn)) {
if (_isScaning) {
FlutterBlueElves.instance.stopScan();
} else {
_scanResultList = [];
setState(() {
_isScaning = true;
});
FlutterBlueElves.instance.startScan(5000).listen((event) {
setState(() {
_scanResultList.insert(0, event);
});
}).onDone(() {
setState(() {
_isScaning = false;
});
});
}
}
},
tooltip: 'scan',
child: Icon(_isScaning ? Icons.stop : Icons.find_replace),
), // This trailing comma makes auto-formatting nicer for build methods.
);
}
}
class _ConnectedItem {
final Device _device;
final String? _macAddress;
final String? _name;
_ConnectedItem(this._device, this._macAddress, this._name);
}Metadata
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popularity
Publisher
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Metadata
A flutter plugin for bluetooth ble device connect and control.
Repository (GitHub)
View/report issues
Documentation
License
MIT (LICENSE)
