chipweinberger
commented
5 months ago try example app
Closed guduqiucai closed 5 months ago
chipweinberger
commented
5 months ago try example app
guduqiucai
commented
5 months ago example app is OK，but my app is wrong, this is my
main.dart:
class TestBluePage extends StatefulWidget {
TestBluePage({Key? key}) : super(key: key);
@override
TestBlueState createState() => TestBlueState();
}
class TestBlueState extends State<TestBluePage> {
bool isDebug = false;
bool isBleOn = false;
bool isConnecting = false;
List<ScanResult> _blueDevice = [];
late BluetoothService currentService;
late BluetoothCharacteristic writeChar;
late BluetoothCharacteristic readChar;
List<String> receiveData = [];
List<String> blueName = [];
bool isAutoConnect = false;
Timer? authTimer;
var subscription = null;
@override
void initState() {
super.initState();
reuestBlue();
requestLocation();
/// 监听蓝牙扫描结果
scanLister();
}
@override
void dispose() {
EasyLoading.dismiss();
authTimer?.cancel();
super.dispose();
subscription.cancel();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(S.current.bluetoothPageTitle, style: TextStyle(color: Colors.white),),
backgroundColor: Colors.blue,
leading: Padding(
padding: EdgeInsets.only(top: 3),
child: IconButton(
tooltip: S.current.returnPrePage,
icon: Icon(
CupertinoIcons.left_chevron,
color: Colors.white,
),
onPressed: () {
Navigator.of(context).pop();
},
),
),
),
body: ListView(
children: [
Platform.isAndroid ? Text(
S.current.androidTips,
style: TextStyle(
fontWeight: FontWeight.normal,
color: Colors.black54,
backgroundColor: Colors.white
),
): Container(),
SingleChildScrollView(
child: Column(
children: <Widget>[
ListView.separated(
itemBuilder: _buildBlueDevice,
physics: NeverScrollableScrollPhysics(),
shrinkWrap: true,
itemCount: _blueDevice.length,
separatorBuilder: (BuildContext context, int index) =>
Divider(
height: 1,
color: Colors.grey,
)),
],
),
),
],
),
// ],),
floatingActionButton: Stack(
children: [
Align(
alignment: Alignment.bottomRight,
child: FloatingActionButton(
backgroundColor: Colors.blue,
onPressed: searchBlueClick,
heroTag: S.current.scan,
tooltip: S.current.scanBluetoothDevices,
child: Icon(Icons.bluetooth_searching_outlined, color: Colors.white,),
),
),
],
));
}
reuestBlue() async {
if (await Permission.bluetooth.request().isGranted) {
print('蓝牙权限已开启');
} else {
print('蓝牙权限请求失败');
}
FlutterBluePlus.isSupported.then((value) {
print('蓝牙是否可用,$value');
});
FlutterBluePlus.isOn.then((value) {
print('蓝牙状态已经开启,$value');
isBleOn = value;
});
FlutterBluePlus.adapterState.listen((state) {
if (state == BluetoothAdapterState.on) {
print('蓝牙状态为开启');
isBleOn = true;
searchBlue();
} else if (state == BluetoothAdapterState.off) {
print('蓝牙状态为关闭');
isBleOn = false;
}
});
}
requestLocation() async {
if (await Permission.location.isGranted) {
print('位置权限已开启1');
} else {
print('蓝牙搜索需要开启位置权限');
if (await Permission.location.request().isGranted) {
print('位置权限已开启2');
searchBlue();
} else {
print('位置权限请求失败');
}
}
}
Widget _buildBlueDevice(BuildContext context, int index) {
ScanResult model = _blueDevice[index];
print(model);
return Padding(
padding: EdgeInsets.only(top: 5, bottom: 5, left: 0, right: 10),
child: Row(
children: <Widget>[
model.device.connectionState != BluetoothConnectionState.connected
? IconButton(
onPressed: null,
icon: Icon(
Icons.bluetooth,
color: green,
),
)
: IconButton(
onPressed: () => model.device.disconnect(),
icon: Icon(Icons.bluetooth_connected),
),
Container(
width: 200,
child: Tooltip(
child: Text(
breakWord(Platform.isAndroid ? model.device.platformName : model.advertisementData.advName),
// breakWord(Platform.isAndroid ? model.device.localName : model.advertisementData.advName),
maxLines: 1,
overflow: TextOverflow.ellipsis,
style: TextStyle(
fontSize: 18,
fontWeight: FontWeight.bold,
),
),
message: model.device.platformName,
),
),
Expanded(
child: Text(''),
),
ElevatedButton(
// 赋值为null,就是disable状态
onPressed: model.advertisementData.connectable
? () {
isAutoConnect = false;
beforeConnectDeal(model);
}
: null,
style: ElevatedButton.styleFrom(
backgroundColor: green,
disabledBackgroundColor: Colors.green[300],
fixedSize: const Size(100, 10),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(5))),
child: Text(
S.current.connect,
style: TextStyle(color: Colors.white, fontSize: 16),
),
),
],
),
);
}
// 自动扫描蓝牙设备
void searchBlue() {
if (!isBleOn) {
showWarnToast(S.current.bluetoothOffMessage);
return;
}
FlutterBluePlus.stopScan().then((value) {
print('blue is stop');
print('start scan');
setState(() {
this.blueName.clear();
this._blueDevice.clear();
});
// Listen to scan results
if (FlutterBluePlus.isScanningNow == false) {
FlutterBluePlus.startScan(timeout: const Duration(seconds: 15));
}
// FlutterBluePlus.startScan(timeout: Duration(seconds: 3));
});
}
// 手动扫描：安卓规定30s内只能扫描5次，因为进入该界面自动扫描了1次，所以30s内只能扫描4次
int startTime = DateTime.now().millisecondsSinceEpoch;
void searchBlueClick() {
if (!isBleOn) {
showWarnToast(S.current.bluetoothOffMessage);
return;
}
int curTime = DateTime.now().millisecondsSinceEpoch;
if (curTime - startTime < 8000) {
return;
} else {
startTime = curTime;
}
FlutterBluePlus.stopScan().then((value) {
print('blue is stop');
print('start scan');
scanLister();
setState(() {
this.blueName.clear();
this._blueDevice.clear();
});
if (FlutterBluePlus.isScanningNow == false) {
FlutterBluePlus.startScan(timeout: Duration(seconds: 15));
}
});
}
void scanLister() {
subscription = FlutterBluePlus.scanResults.listen((results) {
if (results.isNotEmpty) {
// ScanResult res = results.last; // the most recently found device
for (ScanResult r in results) {
if (Platform.isAndroid) {
if (r.device.platformName != '' &&
!blueName.contains(r.device.platformName)) {
blueName.add(r.device.platformName);
if (mounted) {
setState(() {
this._blueDevice.add(r);
});
}
}
} else {
if (r.advertisementData.advName != '' &&
!blueName.contains(r.advertisementData.advName)) {
blueName.add(r.advertisementData.advName);
if (mounted) {
setState(() {
this._blueDevice.add(r);
});
}
}
}
}
}
},
onError: (e) => print(e),
);
}
}
im not sure, your code is pretty confusing. look at the example app code
Requirements
Have you checked this problem on the example app?
No
FlutterBluePlus Version
1.31.13
Flutter Version
3.16.9
What OS?
Android
OS Version
unknown
Bluetooth Module
unknown
What is your problem?
The RedMi k60 phone can detect Bluetooth devices using plugin version 1.10.4, but subsequent plugin versions, including 1.31.13, are unable to detect Bluetooth devices.Other Android phones can normally scan for Bluetooth.
Logs