/// <summary>
/// Requests temporary permission for the given package to access the accessory.
/// This may result in a system dialog being displayed to the user if permission had not already been granted.
/// </summary>
/// <returns>The observable sequence of permission values.</returns>
/// <param name="manager">The UsbManager system service.</param>
/// <param name="context">The Context to request the permission from.</param>
/// <param name="accessory">The UsbAccessory to request permission for.</param>
public static IObservable<bool> PermissionRequested(this UsbManager manager, Context context, UsbAccessory accessory)
{
return Observable.Create<bool> (observer => {
var usbPermissionReceiver = new UsbAccessoryPermissionReceiver (observer, accessory);
context.RegisterReceiver (usbPermissionReceiver, new IntentFilter (ACTION_USB_PERMISSION));
var intent = PendingIntent.GetBroadcast (context, 0, new Intent (ACTION_USB_PERMISSION), 0);
manager.RequestPermission (accessory, intent);
return Disposable.Create (() => context.UnregisterReceiver (usbPermissionReceiver));
});
}