public ScanEventSource()
{
ScanResults = Observable.FromEvent<ScanResult>(h => OnDeviceDetected += h, h => OnDeviceDetected -= h);
var appContext = Application.Context;
var builder = new ScanSettings.Builder();
builder.SetReportDelay(0);
builder.SetScanMode(ScanMode.LowLatency);
var manager = (BluetoothManager)appContext.GetSystemService(Context.BluetoothService);
var adapter = manager.Adapter;
bluetoothLeScanner = adapter.BluetoothLeScanner;
var simpleScanCallback = new SimpleScanCallback(result =>
{
var payload = result.ScanRecord.GetBytes();
var majorId = payload[26];
if (payload[5] == 76 && majorId == Constants.MajorId)
{
var txPower = 255 - payload[29];
var minorId = (payload[27] << 8) + payload[28];
var deviceId = new DeviceIdentifier(new Guid(), majorId, minorId);
var data = new ScanResult(deviceId, result.Rssi, txPower);
OnDeviceDetected?.Invoke(data);
}
});
// taken from https://www.pubnub.com/blog/2015-04-15-build-android-beacon-ibeacon-detector/ , but not detecting our beacons
//bluetoothLeScanner.StartScan(new List<ScanFilter> {CreateScanFilter()}, CreateScanSettings(), simpleScanCallback);
bluetoothLeScanner.StartScan(simpleScanCallback);
}
public async Task StartActivity(ActivityData activity, Station station, DeviceIdentifier identifier)
{
var dto = new Activity
{
Difficulty = activity.Difficulty,
Type = activity.Type,
ConnectedBeacon = Serializer.Serialize(identifier)
};
await service.StartActivity(dto, station.Id);
}
public static ConnectedBeacon Serialize(DeviceIdentifier identifier)
{
return new ConnectedBeacon { Id = identifier.MinorId };
}
public async Task StopActivity(Station station, DeviceIdentifier identifier)
{
await service.StopActivity(station.Id);
}
public async Task<UserData> GetForDevice(DeviceIdentifier id)
{
var dto = await dataLoader.GetUser(Serializer.Serialize(id));
return Serializer.Deserialize(dto);
}
protected bool Equals(DeviceIdentifier other)
{
return MinorId == other.MinorId;
}