Add q&d flutter app

1 files changed, 196 insertions, 0 deletions

diff --git a/lib/main.dart b/lib/main.dart
new file mode 100644
index 0000000..86c82eb
--- /dev/null
+++ b/lib/main.dart
@@ -0,0 +1,196 @@
+import 'package:flutter/material.dart';
+
+import 'package:permission_handler/permission_handler.dart';
+import 'package:flutter_blue_plus/flutter_blue_plus.dart';
+import 'package:logger/logger.dart';
+
+var logger = Logger(printer: PrettyPrinter());
+
+void main() {
+  runApp(const MyApp());
+}
+
+class MyApp extends StatelessWidget {
+  const MyApp({super.key});
+
+  // This widget is the root of your application.
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'Flutter Demo',
+      theme: ThemeData(
+        // This is the theme of your application.
+        //
+        // TRY THIS: Try running your application with "flutter run". You'll see
+        // the application has a purple toolbar. Then, without quitting the app,
+        // try changing the seedColor in the colorScheme below to Colors.green
+        // and then invoke "hot reload" (save your changes or press the "hot
+        // reload" button in a Flutter-supported IDE, or press "r" if you used
+        // the command line to start the app).
+        //
+        // Notice that the counter didn't reset back to zero; the application
+        // state is not lost during the reload. To reset the state, use hot
+        // restart instead.
+        //
+        // This works for code too, not just values: Most code changes can be
+        // tested with just a hot reload.
+        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
+      ),
+      home: const MyHomePage(title: 'Badge Scanner'),
+    );
+  }
+}
+
+class MyHomePage extends StatefulWidget {
+  const MyHomePage({super.key, required this.title});
+
+  // This widget is the home page of your application. It is stateful, meaning
+  // that it has a State object (defined below) that contains fields that affect
+  // how it looks.
+
+  // This class is the configuration for the state. It holds the values (in this
+  // case the title) provided by the parent (in this case the App widget) and
+  // used by the build method of the State. Fields in a Widget subclass are
+  // always marked "final".
+
+  final String title;
+
+  @override
+  State<MyHomePage> createState() => _MyHomePageState();
+}
+
+class _MyHomePageState extends State<MyHomePage> {
+  final List<ScanResult> scanResults = [];
+  bool isScanning = false;
+
+  void _doScan() async {
+    setState(() {
+      scanResults.clear();
+      isScanning = true;
+    });
+    var subscription = FlutterBluePlus.onScanResults.listen(
+      onScanResult,
+      onError: (e) => logger.e(e),
+    );
+
+    await FlutterBluePlus.startScan(
+      //withServices:[Guid("180D")], // match any of the specified services
+      //withNames:["Bluno"], // *or* any of the specified names
+      timeout: Duration(seconds: 10),
+    );
+
+    // wait for scanning to stop
+    await FlutterBluePlus.isScanning.where((val) => val == false).first;
+
+    subscription.cancel();
+    setState(() {
+      isScanning = false;
+    });
+  }
+
+  void onScanResult(results) {
+    if (results.isNotEmpty) {
+      ScanResult r = results.last; // the most recently found device
+      logger.i(
+        '${r.device.remoteId}: "${r.device.advName}" / "${r.advertisementData.advName}" found!',
+      );
+      setState(() {
+        scanResults.add(r);
+      });
+    }
+  }
+
+  Future getPermissions() async {
+    try {
+      await Permission.bluetooth.request();
+    } catch (e) {
+      logger.e(e.toString());
+    }
+  }
+
+  void btHandler(BluetoothAdapterState event) {
+    logger.i(event);
+    switch (event) {
+      case BluetoothAdapterState.on:
+        break;
+      default:
+        break;
+    }
+  }
+
+  @override
+  void initState() {
+    super.initState();
+    getPermissions();
+    FlutterBluePlus.adapterState.listen(btHandler);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    // This method is rerun every time setState is called, for instance as done
+    // by the _incrementCounter method above.
+    //
+    // The Flutter framework has been optimized to make rerunning build methods
+    // fast, so that you can just rebuild anything that needs updating rather
+    // than having to individually change instances of widgets.
+    return Scaffold(
+      appBar: AppBar(
+        // TRY THIS: Try changing the color here to a specific color (to
+        // Colors.amber, perhaps?) and trigger a hot reload to see the AppBar
+        // change color while the other colors stay the same.
+        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
+        // Here we take the value from the MyHomePage object that was created by
+        // the App.build method, and use it to set our appbar title.
+        title: Text(widget.title),
+      ),
+      body: Center(
+        // Center is a layout widget. It takes a single child and positions it
+        // in the middle of the parent.
+        child: Column(
+          // Column is also a layout widget. It takes a list of children and
+          // arranges them vertically. By default, it sizes itself to fit its
+          // children horizontally, and tries to be as tall as its parent.
+          //
+          // Column has various properties to control how it sizes itself and
+          // how it positions its children. Here we use mainAxisAlignment to
+          // center the children vertically; the main axis here is the vertical
+          // axis because Columns are vertical (the cross axis would be
+          // horizontal).
+          //
+          // TRY THIS: Invoke "debug painting" (choose the "Toggle Debug Paint"
+          // action in the IDE, or press "p" in the console), to see the
+          // wireframe for each widget.
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: <Widget>[
+            ElevatedButton(
+              onPressed: isScanning ? null : _doScan,
+              child: isScanning ? Text("Scanning...") : Text("Start scan"),
+            ),
+            Expanded(
+              child: ListView.separated(
+                //itemCount: scanResults.length,
+                itemBuilder: (context, index) {
+                  if (index >= scanResults.length) return null;
+
+                  final result = scanResults[index];
+                  final name = result.device.advName.isEmpty
+                      ? Text("<Unknown>")
+                      : Text(result.device.advName);
+                  return ListTile(
+                    title: name,
+                    subtitle: Text(result.device.remoteId.str),
+                    trailing: Text('RSSI: ${result.rssi}'),
+                  );
+                },
+                separatorBuilder: (BuildContext context, int index) {
+                  return Divider();
+                },
+                itemCount: scanResults.length,
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}