fix bluetooth scan issues on older Android devices by asking for location permission

CHANGELOG.md

@@ -1,3 +1,6 @@
+#### 2.0.2 (2025-04-07)
+- fix bluetooth scan issues on older Android devices by asking for location permission
+
 #### 2.0.1 (2025-04-06)
 - long pressing a button will trigger the action again every 250ms
 

lib/pages/scan.dart

@@ -30,9 +30,13 @@ class _ScanWidgetState extends State<ScanWidget> {
     WidgetsBinding.instance.addPostFrameCallback((_) {
       // must be called from a button
       if (!kIsWeb) {
-        Future.delayed(Duration(seconds: 1)).then((_) {
-          connection.performScanning();
-        });
+        Future.delayed(Duration(seconds: 1))
+            .then((_) {
+              return connection.performScanning();
+            })
+            .catchError((e) {
+              print(e);
+            });
       }
     });
   }

lib/utils/requirements/android.dart

@@ -34,6 +34,21 @@ class BluetoothScanRequirement extends PlatformRequirement {
   }
 }
 
+class LocationRequirement extends PlatformRequirement {
+  LocationRequirement() : super('Allow Location so Bluetooth scan works');
+
+  @override
+  Future<void> call() async {
+    await Permission.locationWhenInUse.request();
+  }
+
+  @override
+  Future<void> getStatus() async {
+    final state = await Permission.locationWhenInUse.status;
+    status = state.isGranted || state.isLimited;
+  }
+}
+
 class BluetoothConnectRequirement extends PlatformRequirement {
   BluetoothConnectRequirement() : super('Allow Bluetooth Connections');
 

lib/utils/requirements/platform.dart

@@ -1,5 +1,6 @@
 import 'dart:io';
 
+import 'package:device_info_plus/device_info_plus.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:swift_control/utils/requirements/android.dart';
@@ -29,12 +30,18 @@ Future<List<PlatformRequirement>> getRequirements() async {
   } else if (Platform.isWindows) {
     list = [BluetoothTurnedOn(), KeyboardRequirement(), BluetoothScanning()];
   } else if (Platform.isAndroid) {
+    final deviceInfoPlugin = DeviceInfoPlugin();
+    final deviceInfo = await deviceInfoPlugin.androidInfo;
     list = [
       BluetoothTurnedOn(),
       AccessibilityRequirement(),
       NotificationRequirement(),
-      BluetoothScanRequirement(),
-      BluetoothConnectRequirement(),
+      if (deviceInfo.version.sdkInt <= 30)
+        LocationRequirement()
+      else ...[
+        BluetoothScanRequirement(),
+        BluetoothConnectRequirement(),
+      ],
       BluetoothScanning(),
     ];
   } else {

macos/Flutter/GeneratedPluginRegistrant.swift

@@ -5,6 +5,7 @@
 import FlutterMacOS
 import Foundation
 
+import device_info_plus
 import file_selector_macos
 import flutter_local_notifications
 import keypress_simulator_macos
@@ -16,6 +17,7 @@ import url_launcher_macos
 import window_manager
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
+  DeviceInfoPlusMacosPlugin.register(with: registry.registrar(forPlugin: "DeviceInfoPlusMacosPlugin"))
   FileSelectorPlugin.register(with: registry.registrar(forPlugin: "FileSelectorPlugin"))
   FlutterLocalNotificationsPlugin.register(with: registry.registrar(forPlugin: "FlutterLocalNotificationsPlugin"))
   KeypressSimulatorMacosPlugin.register(with: registry.registrar(forPlugin: "KeypressSimulatorMacosPlugin"))

pubspec.lock

@@ -128,6 +128,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.7.11"
+  device_info_plus:
+    dependency: "direct main"
+    description:
+      name: device_info_plus
+      sha256: "306b78788d1bb569edb7c55d622953c2414ca12445b41c9117963e03afc5c513"
+      url: "https://pub.dev"
+    source: hosted
+    version: "11.3.3"
+  device_info_plus_platform_interface:
+    dependency: transitive
+    description:
+      name: device_info_plus_platform_interface
+      sha256: "0b04e02b30791224b31969eb1b50d723498f402971bff3630bca2ba839bd1ed2"
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.2"
   fake_async:
     dependency: transitive
     description:
@@ -912,6 +928,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "5.12.0"
+  win32_registry:
+    dependency: transitive
+    description:
+      name: win32_registry
+      sha256: "6f1b564492d0147b330dd794fee8f512cec4977957f310f9951b5f9d83618dae"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.0"
   window_manager:
     dependency: "direct main"
     description:

pubspec.yaml

@@ -1,7 +1,7 @@
 name: swift_control
 description: "SwiftControl - Control your virtual riding"
 publish_to: 'none' # Remove this line if you wish to publish to pub.dev
-version: 2.0.1+0
+version: 2.0.2+0
 
 environment:
   sdk: ^3.7.0
@@ -19,6 +19,7 @@ dependencies:
   image_picker: ^1.1.2
   pointycastle: any
   window_manager: ^0.4.3
+  device_info_plus: ^11.3.3
   keypress_simulator:
     path: keypress_simulator/packages/keypress_simulator
   shared_preferences: ^2.5.3