searchForDevice method
搜索指定设备
Implementation
Future<DiscoveredDevice?> searchForDevice(
List<DevicesFilter> filters, Duration timeout) async {
if (_disposed) {
throw Exception("Searching task can not start after disposed");
}
_filters.clear();
for (var i = 0; i < filters.length; i++) {
_filters.add(filters[i]);
}
_completer = Completer();
_scannerHelper!.addDeviceUpdateListener(_deviceUpdateHandler);
_searchTimer = Timer(timeout, () {
_searchTimer?.cancel();
_searchTimer = null;
if (!_completer.isCompleted) {
_completer.complete(null);
dispose();
}
});
return _completer.future;
}