How to know if Bluetooth connection is lost when application is running in Xamarin Forms. Any listener will hit?

Can you share your API or nugget package that you use?

Which platform that you want to implement this function?

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I am using Plugin.BLE nuget

In all 3 platforms (android,ios,UWP)I need to implement

I am using Plugin.BLE nuget

I want to implement this function in Xamarin Forms.UWP Platform

In my adapter.cs Class the below method is not hitting in UWP. But in ios able to hit below method when bluetooth connection is lost.

        private void Device_ConnectionStatusChanged(object sender, PropertyChangedEventArgs propertyChangedEventArgs)
        {
            if (!(sender is ObservableBluetoothLEDevice nativeDevice) || nativeDevice.BluetoothLEDevice == null)
            {
                return;
            }

            if (propertyChangedEventArgs.PropertyName != nameof(nativeDevice.IsConnected))
            {
                return;
            }

            var address = ParseDeviceId(nativeDevice.BluetoothLEDevice.BluetoothAddress).ToString();
            if (nativeDevice.IsConnected && ConnectedDeviceRegistry.TryGetValue(address, out var connectedDevice))
            {
                if (connectedDevice.State == DeviceState.Connected)
                    HandleConnectedDevice(connectedDevice);
                return;
            }

            if (!nativeDevice.IsConnected && ConnectedDeviceRegistry.TryRemove(address, out var disconnectedDevice))
            {
                HandleDisconnectedDevice(false, disconnectedDevice);
            }
        }

Do you create a custom adapter class that implement the Plugin.BLE.Abstractions.Contracts.IAdapter?

You can try to use adapter.DeviceConnectionLost like following code, will you get the device connection lost?

var adapter = CrossBluetoothLE.Current.Adapter;
adapter.DeviceConnectionLost += Adapter_DeviceConnectionLost;