fix: device name display

app/src/main/java/icu/fur93/esp32_car/page/SettingsPage.kt

@@ -79,16 +79,7 @@ fun SettingsList(viewModel: CarViewModel) {
             SettingConnectDeviceItem(viewModel)
         }
         item {
-            ListItem(
+            SettingDeviceNameItem(viewModel)
-                headlineContent = { Text("设备名称") },
-                supportingContent = { Text("当前名称: Name") },
-                trailingContent = {
-                    Icon(
-                        ImageVector.vectorResource(R.drawable.arrow_right_24),
-                        contentDescription = "设备名称"
-                    )
-                }
-            )
         }
         item {
             ListItem(
@@ -180,3 +171,19 @@ fun SettingConnectDeviceItem(viewModel: CarViewModel) {
         )
     }
 }
+
+@Composable
+fun SettingDeviceNameItem(viewModel: CarViewModel) {
+    val connectionInfoState by viewModel.connectionInfoState.collectAsState()
+
+    ListItem(
+        headlineContent = { Text("设备名称") },
+        supportingContent = { Text("当前名称: ${connectionInfoState.name}") },
+        trailingContent = {
+            Icon(
+                ImageVector.vectorResource(R.drawable.arrow_right_24),
+                contentDescription = "设备名称"
+            )
+        }
+    )
+}

app/src/main/java/icu/fur93/esp32_car/repository/BluetoothRepository.kt

@@ -41,6 +41,8 @@ interface BluetoothRepository {
     fun observeLogs(): Flow<List<LogEntry>>
     fun clearLogs()
     val connectionState: StateFlow<ConnectionState>
+    val deviceName: StateFlow<String?>
+    val deviceAddress: StateFlow<String?>
 }
 
 // 添加连接状态枚举
@@ -55,6 +57,9 @@ val serviceUUID = "6E400001-B5A3-F393-E0A9-E50E24DCCA9E"
 val rxCharUUID = "6E400002-B5A3-F393-E0A9-E50E24DCCA9E"
 val txCharUUID = "6E400003-B5A3-F393-E0A9-E50E24DCCA9E"
 
+val deviceInfoServiceUUID = "0000180a-0000-1000-8000-00805f9b34fb"
+val deviceNameCharUUID = "00002a00-0000-1000-8000-00805f9b34fb"
+
 // 蓝牙通信实现
 class BluetoothRepositoryImpl(
     private val context: Context,
@@ -80,6 +85,12 @@ class BluetoothRepositoryImpl(
     private val _connectionState = MutableStateFlow(ConnectionState.DISCONNECTED)
     override val connectionState: StateFlow<ConnectionState> = _connectionState.asStateFlow()
 
+    private val _deviceName = MutableStateFlow<String?>(null)
+    override val deviceName: StateFlow<String?> = _deviceName.asStateFlow()
+
+    private val _deviceAddress = MutableStateFlow<String?>(null)
+    override val deviceAddress: StateFlow<String?> = _deviceAddress.asStateFlow()
+
     private val scanCallback = object : ScanCallback() {
         override fun onScanResult(callbackType: Int, result: ScanResult) {
             val bleDevice = BleDevice(
@@ -132,7 +143,10 @@ class BluetoothRepositoryImpl(
     }
 
     @SuppressLint("MissingPermission")
-    fun connectToDevice(device: BluetoothDevice, callback: ((Boolean) -> Unit)? = null) {
+    fun connectToDevice(
+        device: BluetoothDevice,
+        callback: ((Boolean, BluetoothDevice?) -> Unit)? = null
+    ) {
         _connectionState.value = ConnectionState.CONNECTING
         device.connectGatt(
             context,
@@ -164,21 +178,23 @@ class BluetoothRepositoryImpl(
                                 }
                             }
                             if (callback != null) {
-                                callback(true)
+                                callback(true, gatt.device)
                             }
+                            _deviceAddress.value = gatt.device.address
+                            _deviceName.value = gatt.device.name ?: "未知设备"
                         }
 
                         BluetoothProfile.STATE_CONNECTING -> {
                             _connectionState.value = ConnectionState.CONNECTING
                             if (callback != null) {
-                                callback(false)
+                                callback(false, null)
                             }
                         }
 
                         BluetoothProfile.STATE_DISCONNECTING -> {
                             _connectionState.value = ConnectionState.DISCONNECTING
                             if (callback != null) {
-                                callback(false)
+                                callback(false, null)
                             }
                         }
 
@@ -187,8 +203,10 @@ class BluetoothRepositoryImpl(
                             rxCharacteristic = null
                             _connectionState.value = ConnectionState.DISCONNECTED
                             if (callback != null) {
-                                callback(false)
+                                callback(false, null)
                             }
+                            _deviceName.value = null
+                            _deviceAddress.value = null
                         }
                     }
                 }
@@ -196,6 +214,15 @@ class BluetoothRepositoryImpl(
                 override fun onServicesDiscovered(gatt: BluetoothGatt?, status: Int) {
                     super.onServicesDiscovered(gatt, status)
                     if (status == BluetoothGatt.GATT_SUCCESS) {
+                        // 读取设备名称
+                        val genericService =
+                            gatt?.getService(UUID.fromString("00001800-0000-1000-8000-00805f9b34fb"))
+                        val deviceNameChar =
+                            genericService?.getCharacteristic(UUID.fromString("00002a00-0000-1000-8000-00805f9b34fb"))
+                        if (deviceNameChar != null) {
+                            gatt.readCharacteristic(deviceNameChar)
+                        }
+
                         gatt?.getService(UUID.fromString(serviceUUID))?.let { service ->
                             bluetoothGatt = gatt
                             rxCharacteristic =
@@ -213,6 +240,20 @@ class BluetoothRepositoryImpl(
                     }
                 }
 
+                override fun onCharacteristicRead(
+                    gatt: BluetoothGatt,
+                    characteristic: BluetoothGattCharacteristic,
+                    value: ByteArray,
+                    status: Int
+                ) {
+                    super.onCharacteristicRead(gatt, characteristic, value, status)
+                    if (characteristic.uuid == UUID.fromString(deviceNameCharUUID)) {
+                        val deviceName = String(value)
+                        _deviceName.value = deviceName
+                        Log.d("DeviceName", "Device name: $deviceName")
+                    }
+                }
+
                 override fun onCharacteristicChanged(
                     gatt: BluetoothGatt,
                     characteristic: BluetoothGattCharacteristic,
@@ -222,6 +263,11 @@ class BluetoothRepositoryImpl(
                     if (characteristic.uuid == UUID.fromString(txCharUUID)) {
                         onReceivePacket(value)
                     }
+                    if (characteristic.uuid == UUID.fromString(deviceNameCharUUID)) {
+                        val deviceName = String(value)
+                        _deviceName.value = deviceName
+                        _deviceAddress.value = gatt.device.address
+                    }
                 }
             },
             TRANSPORT_LE
@@ -237,8 +283,8 @@ class BluetoothRepositoryImpl(
             context.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
         val device = bluetoothManager.adapter.getRemoteDevice(address)
         if (callback != null) {
-            connectToDevice(device) { isConnected ->
+            connectToDevice(device) { isConnected, deviceDetail ->
-                callback(isConnected, device)
+                callback(isConnected, deviceDetail ?: device)
             }
         } else {
             connectToDevice(device)
@@ -246,6 +292,28 @@ class BluetoothRepositoryImpl(
 
     }
 
+    @SuppressLint("MissingPermission")
+    private fun setupDeviceNameNotification(gatt: BluetoothGatt) {
+        val service = gatt.getService(UUID.fromString(deviceInfoServiceUUID))
+        val characteristic = service?.getCharacteristic(UUID.fromString(deviceNameCharUUID))
+
+        characteristic?.let { char ->
+            // 启用通知
+            gatt.setCharacteristicNotification(char, true)
+
+            // 获取 descriptor 并写入通知使能值
+            val descriptor =
+                char.getDescriptor(UUID.fromString("00002902-0000-1000-8000-00805f9b34fb"))
+            descriptor?.let {
+                it.value = BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE
+                gatt.writeDescriptor(it)
+            }
+
+            // 同时也读取一次当前值
+            gatt.readCharacteristic(char)
+        }
+    }
+
     @SuppressLint("MissingPermission")
     override fun sendCommand(command: ByteArray) {
         rxCharacteristic?.let { characteristic ->
@@ -321,7 +389,8 @@ class BluetoothRepositoryImpl(
 
     private fun createInfraredState(irPinCount: Int, irData: UByte) = InfraredState(
         enable = true,
-        statusList = irData.toString(2).padStart(irPinCount, '0').reversed().map { if (it == '1') 1u else 0u }
+        statusList = irData.toString(2).padStart(irPinCount, '0').reversed()
+            .map { if (it == '1') 1u else 0u }
     )
 
     // 断开连接方法
@@ -330,6 +399,12 @@ class BluetoothRepositoryImpl(
         bluetoothGatt?.let { gatt ->
             _connectionState.value = ConnectionState.DISCONNECTING
             gatt.disconnect()
+            gatt.close() // 重要：需要调用 close() 释放资源
+            bluetoothGatt = null
+            rxCharacteristic = null
+            _deviceName.value = null
+            _deviceAddress.value = null
+            _connectionState.value = ConnectionState.DISCONNECTED
         }
     }
 }

app/src/main/java/icu/fur93/esp32_car/viewmodel/CarViewModel.kt

@@ -21,6 +21,7 @@ import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.stateIn
 import kotlinx.coroutines.launch
 import android.view.WindowManager
+import kotlinx.coroutines.flow.combine
 
 
 // 用例
@@ -82,20 +83,14 @@ class CarViewModel(
     fun startScan() = (repository as BluetoothRepositoryImpl).startScan()
     fun stopScan() = (repository as BluetoothRepositoryImpl).stopScan()
 
+    @SuppressLint("MissingPermission")
     fun connectToDevice(device: BluetoothDevice) {
-        (repository as BluetoothRepositoryImpl).connectToDevice(device) { isConnected ->
+        (repository as BluetoothRepositoryImpl).connectToDevice(device)
-            if (isConnected) {
-                updateDeviceInfo(device)
-            }
-        }
     }
 
+    @SuppressLint("MissingPermission")
     fun connectToDeviceByAddress(address: String) {
-        (repository as BluetoothRepositoryImpl).connectToDeviceByAddress(address) { isConnected, device ->
+        (repository as BluetoothRepositoryImpl).connectToDeviceByAddress(address)
-            if (isConnected) {
-                updateDeviceInfo(device)
-            }
-        }
     }
 
     val carState: StateFlow<CarState> = repository.observeCarState()
@@ -116,24 +111,43 @@ class CarViewModel(
                 initialValue = ConnectionState.DISCONNECTED
             )
 
+    // 添加断开连接方法
+    fun disconnect() {
+        (repository as BluetoothRepositoryImpl).disconnect()
+    }
+
     init {
-        // 监听连接状态变化
         viewModelScope.launch {
+            // 监听连接状态变化
             connectionState.collect { state ->
-                if (state == ConnectionState.DISCONNECTED) {
+                when (state) {
+                    ConnectionState.DISCONNECTED -> {
                         // 断开连接时清空设备信息
                         _connectionInfoState.value = ConnectionInfoState()
                     }
+                    else -> {
+                        // 其他状态处理...
+                    }
+                }
+            }
+        }
+
+        viewModelScope.launch {
+            repository.deviceName.combine(repository.deviceAddress) { name, address ->
+                Pair(name, address)
+            }.collect { (name, address) ->
+                if (name != null && address != null) {
+                    updateDeviceInfo(name, address)
+                }
             }
         }
     }
 
     // 更新设备信息的方法
-    @SuppressLint("MissingPermission")
+    private fun updateDeviceInfo(deviceName: String?, deviceAddress: String) {
-    fun updateDeviceInfo(device: BluetoothDevice) {
         _connectionInfoState.value = ConnectionInfoState(
-            name = device.name ?: "未知设备",
+            name = deviceName ?: "未知设备 (${deviceAddress})",
-            address = device.address,
+            address = deviceAddress,
             version = "001"
         )
     }