#pragma warning restore 4014
private async Task <BtError> _enumerateDevices()
{
if (!isScanning && !_isConnected)
{
devices.Clear();
deviceAddresses.Clear();
serviceObjects.Clear();
characteristicObjects.Clear();
descriptorObjects.Clear();
subscribeCharacteristics.Clear();
BtError error = await _checkBtSupport();
if (error != BtError.None)
{
return(error);
}
watcher = new BluetoothLEAdvertisementWatcher();
watcher.ScanningMode = BluetoothLEScanningMode.Active;
watcher.Received += DeviceDiscovered;
watcher.Start();
isScanning = true;
return(BtError.None);
}
else
{
return(BtError.AlreadyRunning);
}
}
/// <summary>
/// Handle the connect button. If connected disconnect. Otherwise connect.
/// </summary>
/// <param name="src">Source</param>
/// <param name="e">EventArgs</param>
void OnConnectClicked(object src, EventArgs e)
{
Debug.WriteLine("IsConnected: " + bluetooth.isConnected());
if (!bluetooth.isConnected())
{
bluetooth.endEnumeration();
bluetooth.disconnect();
BtError error = bluetooth.checkBtSupport();
switch (error)
{
case BtError.Disabled:
bluetooth.showEnableBtPrompt(AppResources.EnableBTTitle, AppResources.EnableBTMessage, AppResources.EnableBTConfirm, AppResources.EnableBTCancel);
requestTime = Environment.TickCount;
break;
case BtError.None:
// Do not allow this to be shown more than once at a time
if (bluetoothDevicePage == null)
{
discoveredDevices.Clear();
deviceNames.Clear();
bluetoothDevicePage = new BluetoothDevicePage();
Navigation.PushModalAsync(bluetoothDevicePage);
}
break;
default:
UserDialogs.Instance.Alert(AppResources.AlertBtErrorMessage, AppResources.AlertBtErrorTitle, AppResources.AlertOk);
break;
}
}
else
{
UserDialogs.Instance.Confirm(new ConfirmConfig()
{
Title = AppResources.ConfirmDisconnectTitle,
Message = AppResources.ConfirmDisconnectMessage.Replace("%DEV%", connectedDeviceName),
OkText = AppResources.Yes,
CancelText = AppResources.No,
OnAction = (result) => {
if (result)
{
bluetooth.endEnumeration();
manualDisconnect = true;
bluetooth.disconnect();
}
}
});
}
}
#pragma warning disable 4014
public UWPBluetooth(BTCallback btCallback)
{
this.callback = btCallback;
Task.Run(async() => {
BtError error = await _checkBtSupport();
if (error != BtError.NoBluetooth && error != BtError.NoBLE)
{
var lastState = error == BtError.None;
// Watch for bt power changes
while (true)
{
BtError e = await _checkBtSupport();
var state = e == BtError.None;
if (state != lastState)
{
lastState = state;
// Should not wait for this. That would slow down checking for power changes
callback.onBluetoothPowerChanged(state);
}
await Task.Delay(100);
}
}
});
}
