Add API to disable Bluetooth (#113)

* Add api to disable Bluetooth

* Implement Android support

* Fix apple build

* Update Readme

* Combine rows

---------

Co-authored-by: Foti Dim <fdimanidis@gmail.com>

lib/src/universal_ble.dart

@@ -321,6 +321,15 @@ class UniversalBle {
     );
   }
 
+  /// Disable Bluetooth.
+  /// It might throw errors if Bluetooth is not available.
+  /// Not supported on `Web` and `Apple`.
+  static Future<bool> disableBluetooth() async {
+    return await _bleCommandQueue.queueCommand(
+      () => _platform.disableBluetooth(),
+    );
+  }
+
   /// [receivesAdvertisements] returns true on web if the browser supports receiving advertisements from a certain `deviceId`.
   /// The rest of the platforms will always return true.
   /// If true, then you will be getting scanResult updates for this device.

lib/src/universal_ble_linux/universal_ble_linux.dart

@@ -53,6 +53,23 @@ class UniversalBleLinux extends UniversalBlePlatform {
     }
   }
 
+  @override
+  Future<bool> disableBluetooth() async {
+    await _ensureInitialized();
+    var adapter = _activeAdapter;
+    if (adapter == null) {
+      throw "Adapter not available";
+    }
+    if (!adapter.powered) return true;
+    try {
+      await adapter.setPowered(false);
+      return !adapter.powered;
+    } catch (e) {
+      UniversalLogger.logError('Error disabling bluetooth: $e');
+      return false;
+    }
+  }
+
   @override
   Future<void> startScan({
     ScanFilter? scanFilter,

lib/src/universal_ble_pigeon/universal_ble.g.dart

@@ -1,4 +1,4 @@
-// Autogenerated from Pigeon (v22.4.0), do not edit directly.
+// Autogenerated from Pigeon (v22.6.1), do not edit directly.
 // See also: https://pub.dev/packages/pigeon
 // ignore_for_file: public_member_api_docs, non_constant_identifier_names, avoid_as, unused_import, unnecessary_parenthesis, prefer_null_aware_operators, omit_local_variable_types, unused_shown_name, unnecessary_import, no_leading_underscores_for_local_identifiers
 
@@ -332,6 +332,33 @@ class UniversalBlePlatformChannel {
     }
   }
 
+  Future<bool> disableBluetooth() async {
+    final String pigeonVar_channelName = 'dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.disableBluetooth$pigeonVar_messageChannelSuffix';
+    final BasicMessageChannel<Object?> pigeonVar_channel = BasicMessageChannel<Object?>(
+      pigeonVar_channelName,
+      pigeonChannelCodec,
+      binaryMessenger: pigeonVar_binaryMessenger,
+    );
+    final List<Object?>? pigeonVar_replyList =
+        await pigeonVar_channel.send(null) as List<Object?>?;
+    if (pigeonVar_replyList == null) {
+      throw _createConnectionError(pigeonVar_channelName);
+    } else if (pigeonVar_replyList.length > 1) {
+      throw PlatformException(
+        code: pigeonVar_replyList[0]! as String,
+        message: pigeonVar_replyList[1] as String?,
+        details: pigeonVar_replyList[2],
+      );
+    } else if (pigeonVar_replyList[0] == null) {
+      throw PlatformException(
+        code: 'null-error',
+        message: 'Host platform returned null value for non-null return value.',
+      );
+    } else {
+      return (pigeonVar_replyList[0] as bool?)!;
+    }
+  }
+
   Future<void> startScan(UniversalScanFilter? filter) async {
     final String pigeonVar_channelName = 'dev.flutter.pigeon.universal_ble.UniversalBlePlatformChannel.startScan$pigeonVar_messageChannelSuffix';
     final BasicMessageChannel<Object?> pigeonVar_channel = BasicMessageChannel<Object?>(

lib/src/universal_ble_pigeon/universal_ble_pigeon_channel.dart

@@ -28,6 +28,14 @@ class UniversalBlePigeonChannel extends UniversalBlePlatform {
     return _channel.enableBluetooth();
   }
 
+  @override
+  Future<bool> disableBluetooth() {
+    if (!BleCapabilities.supportsBluetoothEnableApi) {
+      throw UnsupportedError("Not supported");
+    }
+    return _channel.disableBluetooth();
+  }
+
   @override
   Future<void> startScan({
     ScanFilter? scanFilter,

lib/src/universal_ble_platform_interface.dart

@@ -12,6 +12,8 @@ abstract class UniversalBlePlatform {
 
   Future<bool> enableBluetooth();
 
+  Future<bool> disableBluetooth();
+
   Future<void> startScan({
     ScanFilter? scanFilter,
     PlatformConfig? platformConfig,

lib/src/universal_ble_web/universal_ble_web.dart

@@ -335,6 +335,11 @@ class UniversalBleWeb extends UniversalBlePlatform {
     throw UnimplementedError();
   }
 
+  @override
+  Future<bool> disableBluetooth() {
+    throw UnimplementedError();
+  }
+
   RequestOptionsBuilder _getRequestOptionBuilder(
     ScanFilter? scanFilter,
     WebOptions? webOptions,