public static async Task <BluetoothState> GetBluetoothState(Action callbackAction)
{
BluetoothStateBroadcastReceiver bluetoothStateBroadcastReceiver = new BluetoothStateBroadcastReceiver();
bluetoothStateBroadcastReceiver.OnBluetoothStateChange += callbackAction;
CrossCurrentActivity.Current.AppContext.RegisterReceiver(bluetoothStateBroadcastReceiver,
new IntentFilter("android.bluetooth.adapter.action.STATE_CHANGED"));
const int timeoutMs = 2000;
CancellationTokenSource ct = new CancellationTokenSource(timeoutMs);
ct.Token.Register(() =>
{
bluetoothStateBroadcastReceiver._isBluetoothOnAsync?.TrySetResult(
BluetoothAdapter.DefaultAdapter != null && BluetoothAdapter.DefaultAdapter.IsEnabled);
bluetoothStateBroadcastReceiver.OnBluetoothStateChange?.Invoke();
}, false);
BluetoothState bluetoothStateAsync;
if (BluetoothAdapter.DefaultAdapter == null)
{
bluetoothStateAsync = BluetoothState.NO_ADAPTER;
}
bluetoothStateAsync = await bluetoothStateBroadcastReceiver.GetBluetoothStateAsync()
? BluetoothState.ON
: BluetoothState.OFF;
CrossCurrentActivity.Current.AppContext.UnregisterReceiver(bluetoothStateBroadcastReceiver);
return(bluetoothStateAsync);
}
public override async void OnReceive(Context context, Intent intent)
{
IsFlightModeOn = intent.GetBooleanExtra("state", false);
// Wait until BT will be turned on or off
await BluetoothStateBroadcastReceiver.GetBluetoothState(OnFlightModeChange);
OnFlightModeChange?.Invoke();
}