flutter_blue_elves 0.0.1 
flutter_blue_elves: ^0.0.1 copied to clipboard
A flutter plugin for bluetooth ble device connect and control.
example/lib/main.dart
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 = [];
final List<_ConnectedItem> _connectedList = [];
bool _isScaning=false;
@override
void initState() {
super.initState();
Timer.periodic(const Duration(milliseconds: 2000),
Platform.isAndroid ? androidGetBlueLack : iosGetBlueState);
}
void iosGetBlueState(timer) {
FlutterBlueElves.instance.iosCheckBluetoothState().then((value) {
setState(() {
_iosBlueState = value;
});
});
}
void androidGetBlueLack(timer) {
FlutterBlueElves.instance.androidCheckBlueLackWhat().then((values) {
setState(() {
_blueLack = values;
});
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
centerTitle: true,
title: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: Platform.isAndroid
? [
FlatButton(
color: _blueLack
.contains(AndroidBluetoothLack.locationPermission)
? Colors.red
: Colors.green,
child: const Text("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");
});
}
},
),
FlatButton(
color: _blueLack
.contains(AndroidBluetoothLack.locationFunction)
? Colors.red
: Colors.green,
child: 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");
});
}
},
),
FlatButton(
color: _blueLack
.contains(AndroidBluetoothLack.bluetoothFunction)
? Colors.red
: Colors.green,
child: 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 agrees to turn on the Bluetooth function");
});
}
},
)
]
: [
FlatButton(
color: _iosBlueState == IosBluetoothState.poweredOn
? Colors.green
: Colors.red,
child: 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>[
FlatButton(
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>[
FlatButton(
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>[
FlatButton(
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>[
FlatButton(
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>[
FlatButton(
child: Text("close"),
onPressed: () => Navigator.of(context).pop(),
),
],
);
},
);
}
},
),
],
),
),
body: ListView.separated(
itemCount:
(_connectedList.isNotEmpty ? _connectedList.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("Paired 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)),
],
),
),
Expanded(
flex: 4,
child: 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;
return Column(children: [
RaisedButton(
child: Text(
currentState == DeviceState.connected
? "Disconnect"
: "Connect"),
onPressed: () {
if (currentState == DeviceState.connected) {
currentConnected._device.disConnect();
} else {
currentConnected._device
.connect(connectTimeout: 5000);
}
},
),
RaisedButton(
child: const Text("destroy"),
onPressed: () {
currentConnected._device.destroy();
setState(() {
_connectedList.removeAt(index - 1);
});
},
),
RaisedButton(
child: const Text("To tap"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) {
return DeviceControl(
currentConnected._name,
currentConnected._macAddress,
currentConnected._device);
},
),
);
},
)
]);
}),
),
],
),
);
}
} else {
int scanStartIndex =
_connectedList.isNotEmpty ? _connectedList.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: [
RaisedButton(
onPressed: () {
ScanResult scanMsg = _scanResultList[
index - scanStartIndex - 1];
Device toConnectDevice =
scanMsg.connect(connectTimeout: 5000);
setState(() {
_connectedList.insert(
0,
_ConnectedItem(
toConnectDevice,
scanMsg.macAddress,
scanMsg.name));
_scanResultList
.removeAt(index - scanStartIndex - 1);
});
Navigator.push(
context,
MaterialPageRoute(
builder: (context) {
return DeviceControl(
scanMsg.name,
scanMsg.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 {
int scanStartIndex =
_connectedList.isNotEmpty ? _connectedList.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: () {
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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Metadata
A flutter plugin for bluetooth ble device connect and control.
Repository (GitHub)
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License
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