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))
{
HandleConnectedDevice(connectedDevice);
return;
}
if (!nativeDevice.IsConnected && ConnectedDeviceRegistry.TryRemove(address, out var disconnectedDevice))
{
HandleDisconnectedDevice(false, disconnectedDevice);
}
}
public override void OnConnectionStateChange(BluetoothGatt gatt, GattStatus status, ProfileState newState)
{
base.OnConnectionStateChange(gatt, status, newState);
IDevice device = null;
if (status != GattStatus.Success)
{
Mvx.TaggedError("OnConnectionStateChange", "GattCallback error: {0}", status);
device = new Device(gatt.Device, gatt, this, 0);
DeviceConnectionError(this, new DeviceConnectionEventArgs()
{
Device = device
});
// We don't return. Allowing to fall-through to the SWITCH, which will assume a disconnect, close GATT and clean up.
// The above error event handles the case where the error happened during a Connect call, which will close out any waiting asyncs.
}
else
{
Mvx.Trace("GattCallback state: {0}", newState.ToString());
}
switch (newState)
{
// disconnected
case ProfileState.Disconnected:
if (DeviceOperationRegistry.TryGetValue(gatt.Device.Address, out device))
{
Mvx.Trace("Disconnected by user");
//Found so we can remove it
DeviceOperationRegistry.Remove(gatt.Device.Address);
ConnectedDeviceRegistry.Remove(gatt.Device.Address);
gatt.Close();
DeviceDisconnected(this, new DeviceConnectionEventArgs {
Device = device
});
break;
}
//connection must have been lost, bacause our device was not found in the registry but was still connected
if (ConnectedDeviceRegistry.TryGetValue(gatt.Device.Address, out device))
{
Mvx.Trace("Disconnected by lost connection");
ConnectedDeviceRegistry.Remove(gatt.Device.Address);
gatt.Close();
DeviceConnectionLost(this, new DeviceConnectionEventArgs()
{
Device = device
});
break;
}
gatt.Close(); // Close GATT regardless, else we can accumulate zombie gatts.
Mvx.Trace("Disconnect. Device not found in registry. Not raising disconnect/lost event.");
break;
// connecting
case ProfileState.Connecting:
Mvx.Trace("Connecting");
break;
// connected
case ProfileState.Connected:
Mvx.Trace("Connected");
//Try to find the device in the registry so that the same instance is updated
if (DeviceOperationRegistry.TryGetValue(gatt.Device.Address, out device))
{
((Device)device).Update(gatt.Device, gatt, this);
//Found so we can remove it
DeviceOperationRegistry.Remove(gatt.Device.Address);
}
else
{
//only for on auto-reconnect (device is not in operation registry)
device = new Device(gatt.Device, gatt, this, 0);
}
ConnectedDeviceRegistry[gatt.Device.Address] = device;
DeviceConnected(this, new DeviceConnectionEventArgs()
{
Device = device
});
break;
// disconnecting
case ProfileState.Disconnecting:
Mvx.Trace("Disconnecting");
break;
}
}