/
main.dart
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/
main.dart
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import 'dart:io';
import 'package:flutter/material.dart';
import 'dart:async';
import 'package:flutter/services.dart';
import 'package:ble/DeviceBle.dart';
import 'package:ble/ble.dart';
import 'package:ble_example/blePage.dart';
import 'package:flutter_localizations/flutter_localizations.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:toast/toast.dart';
import 'SpUtil.dart';
import 'generated/l10n.dart';
void main() {
WidgetsFlutterBinding.ensureInitialized();
// 强制竖屏
SystemChrome.setPreferredOrientations(
[DeviceOrientation.portraitUp, DeviceOrientation.portraitDown]);
// runApp(MyApp());
SpUtil.getInstance().then((value) => runApp(MyApp()));
}
class MyApp extends StatefulWidget {
static final RouteObserver<PageRoute> routeObserver =
RouteObserver<PageRoute>();
@override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
String _platformVersion = 'Unknown';
Locale _locale;
@override
void initState() {
super.initState();
requestPermission();
// 初始化
Ble.getInstance();
initPlatformState();
// 设置显示的默认语言
_locale = Locale(SpUtil.getString(SpUtil.LANGUAGE, defValue: 'zh'), '');
}
requestPermission() async {
PermissionStatus permissionStatus = await Permission.location.status;
if (permissionStatus.isUndetermined) {
List<Permission> permissions = [];
if (Platform.isIOS) {
permissions = [Permission.storage, Permission.phone];
} else {
permissions = [Permission.location,Permission.storage, Permission.phone];
}
Map<Permission, PermissionStatus> statuses = await permissions.request();
}
}
// Platform messages are asynchronous, so we initialize in an async method.
Future<void> initPlatformState() async {
String platformVersion;
// Platform messages may fail, so we use a try/catch PlatformException.
try {
platformVersion = await Ble.getInstance().platformVersion;
print(platformVersion);
} on PlatformException {
platformVersion = 'Failed to get platform version.';
}
// If the widget was removed from the tree while the asynchronous platform
// message was in flight, we want to discard the reply rather than calling
// setState to update our non-existent appearance.
if (!mounted) return;
setState(() {
_platformVersion = platformVersion;
});
}
@override
Widget build(BuildContext context) {
return MaterialApp(
initialRoute: '/',
navigatorObservers: [MyApp.routeObserver],
localizationsDelegates: [
S.delegate,
GlobalMaterialLocalizations.delegate
],
supportedLocales: S.delegate.supportedLocales,
theme: ThemeData(
primaryColor: Colors.blue,
primarySwatch: Colors.blue,
),
home: Builder(builder: (BuildContext context) {
return Localizations.override(
context: context,
locale: _locale,
child: Scaffold(
resizeToAvoidBottomInset: false,
appBar: AppBar(
title: Text("Flutter Ble"),
),
body: Index(),
floatingActionButton: FloatingActionButton(
child: Text.rich(
TextSpan(children: [
TextSpan(text: "Lang\n", style: TextStyle(fontSize: 16)),
TextSpan(
text: "(" +
(_locale.languageCode == 'zh' ? 'ZH' : 'EN') +
")",
style: TextStyle(fontSize: 7))
]),
textAlign: TextAlign.center,
),
onPressed: () {
setState(() {
print(_locale.languageCode);
SpUtil.putString(SpUtil.LANGUAGE,
_locale.languageCode == 'zh' ? 'en' : 'zh');
_locale =
Locale(_locale.languageCode == 'zh' ? 'en' : 'zh', '');
Toast.show(S.of(context).language, context);
});
},
),
));
}),
);
}
}
class Index extends StatefulWidget {
@override
State<StatefulWidget> createState() {
// TODO: implement createState
return IndexState();
}
}
class IndexState extends State<Index>
with RouteAware
implements DeviceListener {
List<DeviceBle> devices = [];
static bool BLEConnected = false;
bool Scanning = false;
@override
void initState() {
// TODO: implement initState
Ble.getInstance().setDeviceListener(this);
super.initState();
requestPermissionAndStartScan();
}
requestPermissionAndStartScan() async {
PermissionStatus permissionStatus = await Permission.location.status;
if (!permissionStatus.isUndetermined) {
Ble.getInstance().startScanBluetooth;
}
}
@override
void didPushNext() {
// TODO: implement didPushNext
super.didPushNext();
print("didPushNext");
Ble.getInstance().stopScanBluetooth;
}
@override
void didChangeDependencies() {
// TODO: implement didChangeDependencies
MyApp.routeObserver.subscribe(this, ModalRoute.of(context));
super.didChangeDependencies();
}
@override
void dispose() {
MyApp.routeObserver.unsubscribe(this);
}
@override
void didPopNext() {
print("didPopNext");
devices.clear();
setState(() {});
Timer(Duration(milliseconds: 200), () {
Ble().setDeviceListener(this);
Ble.getInstance().disconnect();
Ble.getInstance().startScanBluetooth;
});
}
@override
Widget build(BuildContext context) {
// TODO: implement build
print(kMinInteractiveDimension);
return Container(
width: MediaQuery.of(context).size.width,
height: MediaQuery.of(context).size.height -
MediaQuery.of(context).padding.top,
child: Stack(
alignment: Alignment.center,
children: [
Positioned(
bottom: 70,
top: MediaQuery.of(context).padding.top,
child: Column(
children: [
Container(
width: MediaQuery.of(context).size.width,
height: MediaQuery.of(context).size.height -
80 -
kToolbarHeight -
kMinInteractiveDimension,
child: ListView.builder(
itemCount: devices.length,
itemBuilder: (context, index) {
return GestureDetector(
onTap: () async {
Navigator.push(context,
MaterialPageRoute(builder: (_) {
return new BlePage(devices[index]);
}));
},
child: Container(
padding: EdgeInsets.all(5),
height: 40,
child: Row(
children: [
Container(
width: 120,
child: Text(
devices[index].name,
maxLines: 1,
),
),
Expanded(
child: Text(
devices[index].address,
maxLines: 1,
)),
Container(
alignment: Alignment.centerRight,
width: 50,
child:
Text(devices[index].rssi.toString()),
)
],
),
),
);
})),
],
)),
Positioned(
bottom: 30,
child: GestureDetector(
onTap: () async {
setState(() {
devices.clear();
});
PermissionStatus permissionStatus = await Permission.location.status;
if (!permissionStatus.isUndetermined) {
Ble.getInstance().startScanBluetooth;
}
},
child: Container(
width: 50,
height: 50,
decoration: BoxDecoration(
borderRadius: BorderRadius.all(Radius.circular(50)),
color: Colors.blue,
boxShadow: [
BoxShadow(
color: Colors.grey,
offset: Offset(2, 1),
blurRadius: 3,
spreadRadius: 2)
]),
child: Icon(
Icons.autorenew,
color: Colors.white,
),
),
)),
Positioned(
bottom: 30,
left: 20,
child: GestureDetector(
onTap: () {
setState(() {
devices.clear();
});
Ble.getInstance().startScanBluetooth;
},
child: Container(
alignment: Alignment.center,
width: 50,
height: 50,
decoration: BoxDecoration(
borderRadius: BorderRadius.all(Radius.circular(50)),
color: Colors.blue,
boxShadow: [
BoxShadow(
color: Colors.grey,
offset: Offset(2, 1),
blurRadius: 3,
spreadRadius: 2)
]),
child: Text.rich(
TextSpan(children: [
TextSpan(
text: "size\n",
style: TextStyle(color: Colors.white, fontSize: 10)),
TextSpan(
text: devices.length.toString(),
style: TextStyle(color: Colors.white, fontSize: 20),
)
]),
textAlign: TextAlign.center,
),
),
))
],
),
);
}
@override
void onBluetoothOff() {
// TODO: implement onBluetoothOff
}
@override
void onBluetoothOn() {
// TODO: implement onBluetoothOn
}
@override
void onConnectionStateChange(int status) {
// TODO: implement onConnectionStateChange
}
@override
void onReConnected() {
// TODO: implement onReConnected
}
@override
void onReceivedDataListener(List<dynamic> byteData) {
// TODO: implement onReceivedDataListener
}
@override
void onScanStart() {
// TODO: implement onScanStart
print("onScanStart");
Toast.show(
S.of(context).start_searching_for_attached_bluetooth_devices, context,
gravity: Toast.CENTER);
Scanning = true;
setState(() {});
}
@override
void onScanStop() {
// TODO: implement onScanStop
print("onScanStop");
Toast.show(
S.of(context).stop_searching_for_attached_bluetooth_devices, context,
gravity: Toast.CENTER);
Scanning = false;
setState(() {});
}
@override
void onFoundDevice(List<DeviceBle> devices) {
print("main->onFoundDevice");
this.devices = devices;
setState(() {});
}
@override
void onServicesDiscovered() {
// TODO: implement onServicesDiscovered
}
@override
void onServicesNotSupport() {
// TODO: implement onServicesNotSupport
}
@override
void onServiceCharac(data) {
// TODO: implement onServiceCharac
}
}