void InitializeScanner()
{
if (_adapter == null)
{
return;
}
// initialize scanner
var sb = new ScanSettings.Builder()
.SetCallbackType(ScanCallbackType.AllMatches)
.SetScanMode(ScanMode.LowLatency);
if (Build.VERSION.SdkInt >= BuildVersionCodes.M)
{
sb = sb.SetMatchMode(BluetoothScanMatchMode.Aggressive).SetNumOfMatches(1);
}
_scanSettings = sb.Build();
sb.SetReportDelay(1000);
_scanSettingsBatch = sb.Build();
_scanner = _adapter.BluetoothLeScanner;
_scanCallback = new ScanCallbackImpl(this);
_scanCallbackBatch = new BatchScanCallbackImpl();
}
private void StartScanningNew(Guid[] serviceUuids)
{
var hasFilter = serviceUuids?.Any() ?? false;
List <ScanFilter> scanFilters = null;
if (hasFilter)
{
scanFilters = new List <ScanFilter>();
foreach (var serviceUuid in serviceUuids)
{
var sfb = new ScanFilter.Builder();
sfb.SetServiceUuid(ParcelUuid.FromString(serviceUuid.ToString()));
scanFilters.Add(sfb.Build());
}
}
var ssb = new ScanSettings.Builder();
ssb.SetScanMode(ScanMode.ToNative());
//ssb.SetCallbackType(ScanCallbackType.AllMatches);
if (_bluetoothAdapter.BluetoothLeScanner != null)
{
Trace.Message($"Adapter >=21: Starting a scan for devices. ScanMode: {ScanMode}");
if (hasFilter)
{
Trace.Message($"ScanFilters: {string.Join(", ", serviceUuids)}");
}
_bluetoothAdapter.BluetoothLeScanner.StartScan(scanFilters, ssb.Build(), _api21ScanCallback);
}
else
{
Trace.Message("Adapter >= 21: Scan failed. Bluetooth is probably off");
}
}
public IObservable <IScanResult> Scan()
{
return(Observable.Create <ScanResult>(ob =>
{
_callback = new LollipopScanCallback((native, rssi, sr) =>
{
var scanResult = ToScanResult(native, rssi, sr);
ob.OnNext(scanResult);
});
var builder = new ScanSettings.Builder();
builder.SetScanMode(ScanMode.Balanced);
var scanFilters = new List <ScanFilter>();
_manager.Adapter.BluetoothLeScanner.StartScan(
scanFilters,
builder.Build(),
_callback);
return () => _manager.Adapter.BluetoothLeScanner?.StopScan(_callback);
})
.Finally(() =>
{
}));
}
static async Task <IReadOnlyCollection <BluetoothDevice> > PlatformScanForDevices(RequestDeviceOptions options)
{
List <ScanFilter> filters = new List <ScanFilter>();
foreach (var f in options.Filters)
{
foreach (var u in f.Services)
{
ScanFilter.Builder b = new ScanFilter.Builder();
b.SetServiceUuid(ParcelUuid.FromString(u.Value.ToString()));
filters.Add(b.Build());
}
}
ScanSettings.Builder sb = new ScanSettings.Builder();
sb.SetScanMode(Android.Bluetooth.LE.ScanMode.Balanced);
var settings = sb.Build();
var callback = new DevicesCallback();
_manager.Adapter.BluetoothLeScanner.StartScan(callback);
await Task.Delay(30000);
return(callback.Devices.AsReadOnly());
}
private async Task <bool> NewScanAsync(Action <BrickController2.PlatformServices.BluetoothLE.ScanResult> scanCallback, CancellationToken token)
{
try
{
var leScanner = new BluetoothLENewScanner(scanCallback);
var settingsBuilder = new ScanSettings.Builder()
.SetCallbackType(ScanCallbackType.AllMatches)
.SetScanMode(Android.Bluetooth.LE.ScanMode.LowLatency);
_bluetoothAdapter.BluetoothLeScanner.StartScan(null, settingsBuilder.Build(), leScanner);
var tcs = new TaskCompletionSource <bool>(TaskCreationOptions.RunContinuationsAsynchronously);
using (token.Register(() =>
{
_bluetoothAdapter.BluetoothLeScanner.StopScan(leScanner);
tcs.TrySetResult(true);
}))
{
return(await tcs.Task);
}
}
catch (Exception)
{
return(false);
}
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.activity_main);
// Start scanning for the beacon we want to write a value to
var scanModeBuilder = new ScanSettings.Builder();
scanModeBuilder.SetScanMode(ScanMode.LowLatency);
var deviceAddressFilterBuilder = new ScanFilter.Builder();
deviceAddressFilterBuilder.SetDeviceAddress(_MyDeviceAddress);
_Manager = (BluetoothManager)GetSystemService("bluetooth");
_Adapter = _Manager.Adapter;
_Scanner = _Adapter.BluetoothLeScanner;
_ScanCallback = new BleScanCallback(this);
_GattCallback = new BleGattCallback(this);
_LogTextView = FindViewById <TextView>(Resource.Id.logTextView);
_Scanner.StartScan(
new List <ScanFilter>
{
deviceAddressFilterBuilder.Build()
}, scanModeBuilder.Build(), _ScanCallback);
_LogTextView.Text = "Started scanning....";
}
private ScanSettings BuildScanSettings()
{
var builder = new ScanSettings.Builder();
builder.SetScanMode(Android.Bluetooth.LE.ScanMode.LowPower);
return(builder.Build());
}
public void Start()
{
ScanSettings.Builder scanSettingsBuilder = null;
ScanSettings scanSettings = null;
switch (this.DriverState)
{
case BluetoothDriverStates.NotPresent:
return;
case BluetoothDriverStates.Enabled:
this.scannerCallback = new DroidLEScannerCallback();
this.bluetoothLeScanner = this.bluetoothAdapter.BluetoothLeScanner;
if (this.scanfiltersList.Count == 0)
{
this.bluetoothLeScanner.StartScan(this.scannerCallback);
}
else
{
scanSettingsBuilder = new ScanSettings.Builder();
scanSettingsBuilder.SetMatchMode(BluetoothScanMatchMode.Aggressive);
scanSettingsBuilder.SetScanMode(Android.Bluetooth.LE.ScanMode.LowLatency);
scanSettings = scanSettingsBuilder.Build();
try
{
this.bluetoothLeScanner.StartScan(this.scanfiltersList, scanSettings, this.scannerCallback);
}
catch (Exception)
{
}
}
this.DriverState = BluetoothDriverStates.Discovering;
break;
}
}
public DroidBluetoothDriver(Guid[] filter)
: this(null, null)
{
ScanSettings.Builder scanSettingsBuilder = null;
scanSettingsBuilder = new ScanSettings.Builder();
scanSettingsBuilder.SetMatchMode(BluetoothScanMatchMode.Aggressive);
scanSettingsBuilder.SetScanMode(Android.Bluetooth.LE.ScanMode.LowLatency);
this.scanSettings = scanSettingsBuilder.Build();
this.scanfiltersList = new List <ScanFilter>();
if (filter != null && filter.Length > 0)
{
foreach (Guid selectedFilter in filter)
{
ParcelUuid parcelUuid = null;
ScanFilter.Builder filterBuilder = new ScanFilter.Builder();
ScanFilter currentFilter = null;
try
{
parcelUuid = ParcelUuid.FromString(selectedFilter.ToString());
filterBuilder.SetServiceUuid(parcelUuid);
currentFilter = filterBuilder.Build();
this.scanfiltersList.Add(currentFilter);
}
catch (Exception)
{
}
}
}
}
protected virtual IObservable <ScanResult> NewScan(ScanConfig config) => Observable.Create <ScanResult>(ob =>
{
this.callbacks = new LollipopScanCallback((native, rssi, sr) =>
{
var scanResult = this.ToScanResult(native, rssi, new AdvertisementData(sr));
ob.OnNext(scanResult);
});
var builder = new ScanSettings.Builder();
var scanMode = this.ToNative(config.ScanType);
builder.SetScanMode(scanMode);
if (CrossBleAdapter.AndroidConfiguration.AdvancedScannerSettings)
{
if (config.MatchMode != null)
{
builder.SetMatchMode(this.ToNative(config.MatchMode.Value));
}
if (config.NumOfMatches != null)
{
builder.SetNumOfMatches((int)this.ToNative(config.NumOfMatches.Value));
}
}
var scanFilters = new List <ScanFilter>();
if (config.ServiceUuids != null && config.ServiceUuids.Count > 0)
{
foreach (var guid in config.ServiceUuids)
{
var uuid = guid.ToParcelUuid();
scanFilters.Add(new ScanFilter.Builder()
.SetServiceUuid(uuid)
.Build()
);
}
}
if (config.AndroidUseScanBatching && this.manager.Adapter.IsOffloadedScanBatchingSupported)
{
builder.SetReportDelay(100);
}
this.manager.Adapter.BluetoothLeScanner.StartScan(
scanFilters,
builder.Build(),
this.callbacks
);
return(() => this.manager.Adapter.BluetoothLeScanner?.StopScan(this.callbacks));
});
private void StartScanningNew(Guid[] serviceUuids, ManufacturerData[] manufacturerDataFilters)
{
var hasFilter = serviceUuids?.Any() ?? false;
List <ScanFilter> scanFilters = null;
if (hasFilter)
{
scanFilters = new List <ScanFilter>();
foreach (var serviceUuid in serviceUuids)
{
var sfb = new ScanFilter.Builder();
sfb.SetServiceUuid(ParcelUuid.FromString(serviceUuid.ToString()));
scanFilters.Add(sfb.Build());
}
foreach (var manufacturerData in manufacturerDataFilters)
{
var sfb = new ScanFilter.Builder();
sfb.SetManufacturerData(manufacturerData.Id, manufacturerData.Data);
scanFilters.Add(sfb.Build());
}
}
var ssb = new ScanSettings.Builder();
ssb.SetScanMode(ScanMode.ToNative());
if (Build.VERSION.SdkInt >= BuildVersionCodes.O)
{
// enable Bluetooth 5 Advertisement Extensions on Android 8.0 and above
ssb.SetLegacy(false);
}
//ssb.SetCallbackType(ScanCallbackType.AllMatches);
if (_bluetoothAdapter.BluetoothLeScanner != null)
{
Trace.Message($"Adapter >=21: Starting a scan for devices. ScanMode: {ScanMode}");
if (hasFilter)
{
Trace.Message($"ScanFilters: {string.Join(", ", serviceUuids)}");
}
_bluetoothAdapter.BluetoothLeScanner.StartScan(scanFilters, ssb.Build(), _api21ScanCallback);
}
else
{
Trace.Message("Adapter >= 21: Scan failed. Bluetooth is probably off");
}
}
public async void StartScanningForDevices(int timeOutSeconds = 10, string serviceUuid = null)
{
Console.WriteLine("Adapter: Starting a scan for devices.");
// clear out the list
this._discoveredDevices = new List <IDevice> ();
// start scanning
this._isScanning = true;
var scanFilterBuilder = new ScanFilter.Builder();
if (!string.IsNullOrWhiteSpace(serviceUuid))
{
scanFilterBuilder.SetServiceUuid(ParcelUuid.FromString(serviceUuid));
}
var filter = scanFilterBuilder.Build();
var filterList = new List <ScanFilter>()
{
filter
};
var scanSettingBuilder = new ScanSettings.Builder();
scanSettingBuilder.SetScanMode(ScanMode.Balanced);
var scanSettings = scanSettingBuilder.Build();
this._adapter.BluetoothLeScanner.StartScan(filterList, scanSettings, _scanCallback);
//this._adapter.StartLeScan (this);
// in 10 seconds, stop the scan
await Task.Delay(TimeSpan.FromSeconds(timeOutSeconds));
// if we're still scanning
if (this._isScanning)
{
Console.WriteLine("BluetoothLEManager: Scan timeout has elapsed.");
// Use the method, because it also updates the _isScanning portion.
StopScanningForDevices();
this.ScanTimeoutElapsed(this, new EventArgs());
}
}
public IObservable <ScanResult> Scan(ScanConfig config) => Observable.Create <ScanResult>(ob =>
{
this.devices.Clear();
this.callbacks = new LollipopScanCallback(
sr =>
{
var scanResult = this.ToScanResult(sr.Device, sr.Rssi, new AdvertisementData(sr));
ob.OnNext(scanResult);
},
errorCode => ob.OnError(new BleException("Error during scan: " + errorCode.ToString()))
);
var builder = new ScanSettings.Builder();
var scanMode = this.ToNative(config.ScanType);
builder.SetScanMode(scanMode);
var scanFilters = new List <ScanFilter>();
if (config.ServiceUuids != null && config.ServiceUuids.Count > 0)
{
foreach (var uuid in config.ServiceUuids)
{
var parcel = new ParcelUuid(UUID.FromString(uuid));
scanFilters.Add(new ScanFilter.Builder()
.SetServiceUuid(parcel)
.Build()
);
}
}
if (config.AndroidUseScanBatching && this.Manager.Adapter.IsOffloadedScanBatchingSupported)
{
builder.SetReportDelay(100);
}
this.Manager.Adapter.BluetoothLeScanner.StartScan(
scanFilters,
builder.Build(),
this.callbacks
);
return(() => this.Manager.Adapter.BluetoothLeScanner?.StopScan(this.callbacks));
});
public DroidBluetoothDriver(IEnumerable <ScanFilter> scanFilters, ScanSettings scanSettings)
{
ScanSettings.Builder scanSettingsBuilder = null;
if (scanFilters != null)
{
this.scanfiltersList = new List <ScanFilter>(scanFilters);
}
else
{
this.scanfiltersList = new List <ScanFilter>();
}
if (scanSettings != null)
{
this.scanSettings = scanSettings;
}
else
{
scanSettingsBuilder = new ScanSettings.Builder();
scanSettingsBuilder.SetMatchMode(BluetoothScanMatchMode.Aggressive);
scanSettingsBuilder.SetScanMode(Android.Bluetooth.LE.ScanMode.LowLatency);
this.scanSettings = scanSettingsBuilder.Build();
}
if (!Application.Context.PackageManager.HasSystemFeature(PackageManager.FeatureBluetoothLe))
{
this.State = BluetoothDriverStates.NotPresent;
return;
}
this.bluetoothManager = Application.Context.GetSystemService(Context.BluetoothService) as BluetoothManager;
if (this.bluetoothManager != null)
{
this.bluetoothAdapter = this.bluetoothManager.Adapter;
if (this.bluetoothAdapter != null)
{
this.State = BluetoothDriverStates.Enabled;
}
}
}
void IAdvertiseAndDiscoverBluetoothDevice.Discover()
{
try
{
Analytics.TrackEvent(Build.Model + " Discover method called.");
List <ScanFilter> filters = new List <ScanFilter>();
ScanFilter filter = new ScanFilter.Builder()
.SetServiceUuid(new ParcelUuid(MY_UUID))
.Build();
filters.Add(filter);
//ScanSettings settings = new ScanSettings.Builder()
// .SetScanMode(Android.Bluetooth.LE.ScanMode.LowLatency)
// .Build();
ScanSettings.Builder builder = new ScanSettings.Builder();
builder.SetScanMode(Android.Bluetooth.LE.ScanMode.LowLatency);
if (Build.VERSION.SdkInt >= BuildVersionCodes.M /* Marshmallow */)
{
builder.SetMatchMode(BluetoothScanMatchMode.Aggressive);
builder.SetNumOfMatches((int)BluetoothScanMatchNumber.MaxAdvertisement);
builder.SetCallbackType(ScanCallbackType.AllMatches);
}
var settings = builder.Build();
myScanCallback = new MyScanCallback();
bluetoothLeScanner = BluetoothAdapter.DefaultAdapter.BluetoothLeScanner;
bluetoothLeScanner.StartScan(filters, settings, myScanCallback);
}
catch (System.Exception ex)
{
Analytics.TrackEvent(Build.Model + " Something went wrong in Discover method.");
}
}
public async void StartScanning()
{
if (IsScanning)
{
return;
}
IsScanning = true;
// TODO: Handle power on state.
if (_sdkInt >= Android.OS.BuildVersionCodes.Lollipop) // 21
{
_bleScanner = _adapter.BluetoothLeScanner;
_scanCallback = new OWBLE_ScanCallback(this);
var scanFilters = new List <ScanFilter>();
var scanSettingsBuilder = new ScanSettings.Builder();
var scanFilterBuilder = new ScanFilter.Builder();
scanFilterBuilder.SetServiceUuid(OWBoard.ServiceUUID.ToParcelUuid());
scanFilters.Add(scanFilterBuilder.Build());
_bleScanner.StartScan(scanFilters, scanSettingsBuilder.Build(), _scanCallback);
}
else if (_sdkInt >= Android.OS.BuildVersionCodes.JellyBeanMr2) // 18
{
_leScanCallback = new OWBLE_LeScanCallback(this);
#pragma warning disable 0618
_adapter.StartLeScan(new Java.Util.UUID[] { OWBoard.ServiceUUID.ToUUID() }, _leScanCallback);
#pragma warning restore 0618
}
else
{
throw new NotImplementedException("Can't run bluetooth scans on device lower than Android 4.3");
}
await Task.Delay(15 * 1000);
StopScanning();
}
public bool StartScanning()
{
if (isScanning)
{
return(true);
}
if (IsEnabled)
{
// Stops scanning after a pre-defined scan period.
//scanHandler.PostDelayed(new Runnable(() =>
//{
// isScanning = false;
// scanner.StopScan(scanCallback);
//}), 10000);
isScanning = true;
ScanFilter.Builder builder = new ScanFilter.Builder();
builder.SetServiceUuid(DottedUUID);
ScanSettings.Builder sBuilder = new ScanSettings.Builder();
sBuilder.SetScanMode(Android.Bluetooth.LE.ScanMode.LowPower);
scanner.StartScan(new List <ScanFilter> {
builder.Build()
},
sBuilder.Build(),
scanCallback);
return(true);
}
else
{
isScanning = false;
scanner.StopScan(scanCallback);
return(false);
}
}
protected override Task StartScanningForDevicesNativeAsync(Guid[] serviceUuids, CancellationToken scanCancellationToken)
{
// clear out the list
DiscoveredDevices.Clear();
if (serviceUuids == null || !serviceUuids.Any())
{
if (Build.VERSION.SdkInt < BuildVersionCodes.Lollipop)
{
Trace.Message("Adapter < 21: Starting a scan for devices.");
//without filter
#pragma warning disable 618
_bluetoothAdapter.StartLeScan(_api18ScanCallback);
#pragma warning restore 618
}
else
{
Trace.Message("Adapter >= 21: Starting a scan for devices.");
if (_bluetoothAdapter.BluetoothLeScanner != null)
{
_bluetoothAdapter.BluetoothLeScanner.StartScan(_api21ScanCallback);
}
else
{
Trace.Message("Adapter >= 21: Scan failed. Bluetooth is probably off");
}
}
}
else
{
if (Build.VERSION.SdkInt < BuildVersionCodes.Lollipop)
{
var uuids = serviceUuids.Select(u => UUID.FromString(u.ToString())).ToArray();
Trace.Message("Adapter < 21: Starting a scan for devices.");
#pragma warning disable 618
_bluetoothAdapter.StartLeScan(uuids, _api18ScanCallback);
#pragma warning restore 618
}
else
{
Trace.Message("Adapter >=21: Starting a scan for devices with service Id {0}.", serviceUuids.First());
var scanFilters = new List <ScanFilter>();
foreach (var serviceUuid in serviceUuids)
{
var sfb = new ScanFilter.Builder();
sfb.SetServiceUuid(ParcelUuid.FromString(serviceUuid.ToString()));
scanFilters.Add(sfb.Build());
}
var ssb = new ScanSettings.Builder();
//ssb.SetCallbackType(ScanCallbackType.AllMatches);
if (_bluetoothAdapter.BluetoothLeScanner != null)
{
_bluetoothAdapter.BluetoothLeScanner.StartScan(scanFilters, ssb.Build(), _api21ScanCallback);
}
else
{
Trace.Message("Adapter >= 21: Scan failed. Bluetooth is probably off");
}
}
}
return(Task.FromResult(true));
}
private ScanSettings CreateScanSettings()
{
ScanSettings.Builder mBuilder = new ScanSettings.Builder();
mBuilder.SetReportDelay(0);
mBuilder.SetScanMode(ScanMode.LowPower);
return mBuilder.Build();
}
private async void StartLeScan(Guid[] serviceUuids)
{
if (_isScanning)
{
Mvx.Trace("Adapter: Already scanning.");
return;
}
_isScanning = true;
// clear out the list
_discoveredDevices = new List <IDevice>();
if (serviceUuids == null || !serviceUuids.Any())
{
if (Build.VERSION.SdkInt < BuildVersionCodes.Lollipop)
{
Mvx.Trace("Adapter < 21: Starting a scan for devices.");
//without filter
_adapter.StartLeScan(this);
}
else
{
Mvx.Trace("Adapter >= 21: Starting a scan for devices.");
if (_adapter.BluetoothLeScanner != null)
{
_adapter.BluetoothLeScanner.StartScan(_api21ScanCallback);
}
else
{
Mvx.Trace("Adapter >= 21: Scan failed. Bluetooth is probably off");
}
}
}
else
{
if (Build.VERSION.SdkInt < BuildVersionCodes.Lollipop)
{
var uuids = serviceUuids.Select(u => UUID.FromString(u.ToString())).ToArray();
Mvx.Trace("Adapter < 21: Starting a scan for devices.");
_adapter.StartLeScan(uuids, this);
}
else
{
Mvx.Trace("Adapter >=21: Starting a scan for devices with service ID {0}.", serviceUuids.First());
var scanFilters = new List <ScanFilter>();
foreach (var serviceUuid in serviceUuids)
{
var sfb = new ScanFilter.Builder();
sfb.SetServiceUuid(ParcelUuid.FromString(serviceUuid.ToString()));
scanFilters.Add(sfb.Build());
}
var ssb = new ScanSettings.Builder();
//ssb.SetCallbackType(ScanCallbackType.AllMatches);
if (_adapter.BluetoothLeScanner != null)
{
_adapter.BluetoothLeScanner.StartScan(scanFilters, ssb.Build(), _api21ScanCallback);
}
else
{
Mvx.Trace("Adapter >= 21: Scan failed. Bluetooth is probably off");
}
}
}
// in ScanTimeout seconds, stop the scan
_cancellationTokenSource = new CancellationTokenSource();
try
{
await Task.Delay(ScanTimeout, _cancellationTokenSource.Token);
Mvx.Trace("Adapter: Scan timeout has elapsed.");
StopScan();
TryDisposeToken();
_isScanning = false;
//important for this to be caled after _isScanning = false;
ScanTimeoutElapsed(this, new EventArgs());
}
catch (TaskCanceledException)
{
Mvx.Trace("Adapter: Scan was cancelled.");
StopScan();
TryDisposeToken();
_isScanning = false;
}
}
protected override async Task ScanAsync(CancellationToken cancellationToken)
{
// start a scan if bluetooth is present and enabled
if (BluetoothAdapter.DefaultAdapter?.IsEnabled ?? false)
{
try
{
if (ScanMode.HasFlag(BluetoothScanModes.LE))
{
List <ScanFilter> scanFilters = new List <ScanFilter>();
if (DiscoverAll == false)
{
ScanFilter scanFilter = new ScanFilter.Builder()
.SetServiceUuid(new ParcelUuid(_deviceIdService.Uuid))
.Build();
scanFilters.Add(scanFilter);
}
ScanSettings.Builder scanSettingsBuilder = new ScanSettings.Builder()
.SetScanMode(global::Android.Bluetooth.LE.ScanMode.Balanced);
// return batched scan results periodically if supported on the BLE chip
if (BluetoothAdapter.DefaultAdapter.IsOffloadedScanBatchingSupported)
{
scanSettingsBuilder.SetReportDelay((long)(ScanDurationMS / 2.0));
}
// start a fresh manager delegate to collect/read results
_bluetoothScannerCallback = new AndroidBluetoothClientScannerCallback(_deviceIdService, _deviceIdCharacteristic, this);
BluetoothAdapter.DefaultAdapter.BluetoothLeScanner.StartScan(scanFilters, scanSettingsBuilder.Build(), _bluetoothScannerCallback);
}
if (ScanMode.HasFlag(BluetoothScanModes.Classic))
{
BluetoothAdapter.DefaultAdapter.StartDiscovery();
}
TaskCompletionSource <bool> scanCompletionSource = new TaskCompletionSource <bool>();
cancellationToken.Register(() =>
{
try
{
if (ScanMode.HasFlag(BluetoothScanModes.LE))
{
BluetoothAdapter.DefaultAdapter.BluetoothLeScanner.StopScan(_bluetoothScannerCallback);
}
else if (ScanMode.HasFlag(BluetoothScanModes.Classic) && BluetoothAdapter.DefaultAdapter.IsDiscovering)
{
BluetoothAdapter.DefaultAdapter.CancelDiscovery();
}
}
catch (Exception ex)
{
SensusServiceHelper.Get().Logger.Log("Exception while stopping scan: " + ex.Message, LoggingLevel.Normal, GetType());
}
finally
{
scanCompletionSource.TrySetResult(true);
}
});
await scanCompletionSource.Task;
}
catch (Exception ex)
{
SensusServiceHelper.Get().Logger.Log("Exception while scanning: " + ex.Message, LoggingLevel.Normal, GetType());
}
}
}
protected override void StartScan()
{
TimeSpan?reportDelay = null;
SensusContext.Current.MainThreadSynchronizer.ExecuteThreadSafe(() =>
{
// start a scan if bluetooth is present and enabled
if (BluetoothAdapter.DefaultAdapter?.IsEnabled ?? false)
{
try
{
ScanFilter scanFilter = new ScanFilter.Builder()
.SetServiceUuid(new ParcelUuid(_deviceIdService.Uuid))
.Build();
List <ScanFilter> scanFilters = new List <ScanFilter>(new[] { scanFilter });
ScanSettings.Builder scanSettingsBuilder = new ScanSettings.Builder()
.SetScanMode(global::Android.Bluetooth.LE.ScanMode.LowPower);
// return batched scan results periodically if supported on the BLE chip
if (BluetoothAdapter.DefaultAdapter.IsOffloadedScanBatchingSupported)
{
reportDelay = TimeSpan.FromSeconds(10);
scanSettingsBuilder.SetReportDelay((long)reportDelay.Value.TotalMilliseconds);
}
BluetoothAdapter.DefaultAdapter.BluetoothLeScanner.StartScan(scanFilters, scanSettingsBuilder.Build(), _bluetoothScannerCallback);
}
catch (Exception ex)
{
SensusServiceHelper.Get().Logger.Log("Exception while starting scanner: " + ex.Message, LoggingLevel.Normal, GetType());
}
}
});
// if we're batching, wait twice the report delay for some results to come in. we sleep below so as not to return from the poll
// and release the wakelock we're currently holding.
if (reportDelay != null)
{
SensusServiceHelper.Get().AssertNotOnMainThread("Waiting for BLE scan results.");
Thread.Sleep((int)(reportDelay.Value.TotalMilliseconds * 2));
lock (EncounteredDeviceData)
{
SensusServiceHelper.Get().Logger.Log("Encountered " + EncounteredDeviceData.Count + " device(s).", LoggingLevel.Normal, GetType());
}
}
// we've scanned and waited for results to come in. stop scanning and wait for next poll.
StopScan();
}
private async void StartLeScan(Guid[] serviceUuids)
{
if (_isScanning)
{
Mvx.Trace("Adapter: Already scanning.");
return;
}
_isScanning = true;
// clear out the list
_discoveredDevices = new List<IDevice>();
if (serviceUuids == null || !serviceUuids.Any())
{
if (Build.VERSION.SdkInt < BuildVersionCodes.Lollipop)
{
Mvx.Trace("Adapter < 21: Starting a scan for devices.");
//without filter
_adapter.StartLeScan(this);
}
else
{
Mvx.Trace("Adapter >= 21: Starting a scan for devices.");
if (_adapter.BluetoothLeScanner != null)
{
_adapter.BluetoothLeScanner.StartScan(_api21ScanCallback);
}
else
{
Mvx.Trace("Adapter >= 21: Scan failed. Bluetooth is probably off");
}
}
}
else
{
if (Build.VERSION.SdkInt < BuildVersionCodes.Lollipop)
{
var uuids = serviceUuids.Select(u => UUID.FromString(u.ToString())).ToArray();
Mvx.Trace("Adapter < 21: Starting a scan for devices.");
_adapter.StartLeScan(uuids, this);
}
else
{
Mvx.Trace("Adapter >=21: Starting a scan for devices with service ID {0}.", serviceUuids.First());
var scanFilters = new List<ScanFilter>();
foreach (var serviceUuid in serviceUuids)
{
var sfb = new ScanFilter.Builder();
sfb.SetServiceUuid(ParcelUuid.FromString(serviceUuid.ToString()));
scanFilters.Add(sfb.Build());
}
var ssb = new ScanSettings.Builder();
//ssb.SetCallbackType(ScanCallbackType.AllMatches);
if (_adapter.BluetoothLeScanner != null)
{
_adapter.BluetoothLeScanner.StartScan(scanFilters, ssb.Build(), _api21ScanCallback);
}
else
{
Mvx.Trace("Adapter >= 21: Scan failed. Bluetooth is probably off");
}
}
}
// in ScanTimeout seconds, stop the scan
_cancellationTokenSource = new CancellationTokenSource();
try
{
await Task.Delay(ScanTimeout, _cancellationTokenSource.Token);
Mvx.Trace("Adapter: Scan timeout has elapsed.");
StopScan();
TryDisposeToken();
_isScanning = false;
//important for this to be caled after _isScanning = false;
ScanTimeoutElapsed(this, new EventArgs());
}
catch (TaskCanceledException)
{
Mvx.Trace("Adapter: Scan was cancelled.");
StopScan();
TryDisposeToken();
_isScanning = false;
}
}
private void StartScanningNew(ScanFilterOptions scanFilterOptions)
{
var hasFilter = scanFilterOptions?.HasFilter == true;
List <ScanFilter> scanFilters = null;
if (hasFilter)
{
scanFilters = new List <ScanFilter>();
if (scanFilterOptions.HasServiceIds)
{
foreach (var serviceUuid in scanFilterOptions.ServiceUuids)
{
var sfb = new ScanFilter.Builder();
sfb.SetServiceUuid(ParcelUuid.FromString(serviceUuid.ToString()));
scanFilters.Add(sfb.Build());
}
}
if (scanFilterOptions.HasServiceData)
{
foreach (var serviceDataFilter in scanFilterOptions.ServiceDataFilters)
{
var sfb = new ScanFilter.Builder();
if (serviceDataFilter.ServiceDataMask == null)
{
sfb.SetServiceData(ParcelUuid.FromString(serviceDataFilter.ServiceDataUuid.ToString()), serviceDataFilter.ServiceData);
}
else
{
sfb.SetServiceData(ParcelUuid.FromString(serviceDataFilter.ServiceDataUuid.ToString()), serviceDataFilter.ServiceData, serviceDataFilter.ServiceDataMask);
}
scanFilters.Add(sfb.Build());
}
}
if (scanFilterOptions.HasManufacturerIds)
{
foreach (var manufacturerDataFilter in scanFilterOptions.ManufacturerDataFilters)
{
var sfb = new ScanFilter.Builder();
if (manufacturerDataFilter.ManufacturerDataMask != null)
{
sfb.SetManufacturerData(manufacturerDataFilter.ManufacturerId, manufacturerDataFilter.ManufacturerData);
}
else
{
sfb.SetManufacturerData(manufacturerDataFilter.ManufacturerId, manufacturerDataFilter.ManufacturerData, manufacturerDataFilter.ManufacturerDataMask);
}
scanFilters.Add(sfb.Build());
}
}
if (scanFilterOptions.HasDeviceAddresses)
{
foreach (var deviceAddress in scanFilterOptions.DeviceAddresses)
{
if (BluetoothAdapter.CheckBluetoothAddress(deviceAddress))
{
var sfb = new ScanFilter.Builder();
sfb.SetDeviceAddress(deviceAddress);
scanFilters.Add(sfb.Build());
}
else
{
Trace.Message($"Device address {deviceAddress} is invalid. The correct format is \"01:02:03:AB:CD:EF\"");
}
}
}
if (scanFilterOptions.HasDeviceNames)
{
foreach (var deviceName in scanFilterOptions.DeviceNames)
{
var sfb = new ScanFilter.Builder();
sfb.SetDeviceName(deviceName);
scanFilters.Add(sfb.Build());
}
}
}
var ssb = new ScanSettings.Builder();
ssb.SetScanMode(ScanMode.ToNative());
if (Build.VERSION.SdkInt >= BuildVersionCodes.O)
{
// enable Bluetooth 5 Advertisement Extensions on Android 8.0 and above
ssb.SetLegacy(false);
}
//ssb.SetCallbackType(ScanCallbackType.AllMatches);
if (_bluetoothAdapter.BluetoothLeScanner != null)
{
Trace.Message($"Adapter >=21: Starting a scan for devices. ScanMode: {ScanMode}");
if (hasFilter)
{
if (scanFilterOptions.HasServiceIds)
{
Trace.Message($"Service UUID Scan Filters: {string.Join(", ", scanFilterOptions.ServiceUuids)}");
}
if (scanFilterOptions.HasServiceData)
{
Trace.Message($"Service Data Scan Filters: {string.Join(", ", scanFilterOptions.ServiceDataFilters.ToString())}");
}
if (scanFilterOptions.HasManufacturerIds)
{
Trace.Message($"Manufacturer Id Scan Filters: {string.Join(", ", scanFilterOptions.ManufacturerDataFilters.ToString())}");
}
if (scanFilterOptions.HasDeviceAddresses)
{
Trace.Message($"Device Address Scan Filters: {string.Join(", ", scanFilterOptions.DeviceAddresses)}");
}
if (scanFilterOptions.HasDeviceNames)
{
Trace.Message($"Device Name Scan Filters: {string.Join(", ", scanFilterOptions.DeviceNames)}");
}
}
_bluetoothAdapter.BluetoothLeScanner.StartScan(scanFilters, ssb.Build(), _api21ScanCallback);
}
else
{
Trace.Message("Adapter >= 21: Scan failed. Bluetooth is probably off");
}
}
