chipweinberger
commented
1 year ago onConnectionStateChange only appears once in your logs, so it agrees with what you are saying.
There is logic in the connectionState code to get the initialValue, perhaps this is causing your problem. You should try adding logs and seeing if this is causing your issue.
Stream<BluetoothConnectionState> get connectionState {
BluetoothConnectionState initialValue = BluetoothConnectionState.disconnected;
if (FlutterBluePlus._connectionStates[remoteId] != null) {
initialValue = _bmToBluetoothConnectionState(FlutterBluePlus._connectionStates[remoteId]!.connectionState);
print("remoteId $remoteId initialValue $initialValue");
} else {
print("remoteId $remoteId no initialValue, assuming disconnected");
}
return FlutterBluePlus._methodStream.stream
.where((m) => m.method == "OnConnectionStateChanged")
.map((m) => m.arguments)
.map((args) => BmConnectionStateResponse.fromMap(args))
.where((p) => p.remoteId == remoteId.str)
.map((p) => _bmToBluetoothConnectionState(p.connectionState))
.newStreamWithInitialValue(initialValue);
}If you see lots of "assuming disconnected", then you should check that the caching logic is being called and caching the value correctly.
// keep track of connection states
if (call.method == "OnConnectionStateChanged") {
BmConnectionStateResponse response = BmConnectionStateResponse.fromMap(call.arguments);
_connectionStates[DeviceIdentifier(response.remoteId)] = response;
if (response.connectionState == BmConnectionStateEnum.disconnected) {
// clear known services, must call discoverServices again
_knownServices.remove(DeviceIdentifier(response.remoteId));
}
}
Eashubh128
FlutterBluePlus Version
1.14.11
Flutter Version
3.10.4
What OS?
Android
OS Version
10
What happened?
I have a scaffold body wrapped with StreamBuilder , that pops up a dialog when the device disconnects , as soon as i reach that screen the dialog appears , even if i close the dialog another one appears as the stream sends duplicate events , so i have added a flag that allows only one dialog ,
But here is the catch the dialog appears , but the device is still connected , as i can send the data to the device .
StreamBuilder<BluetoothConnectionState>( stream: deviceController.connectedDevice?.connectionState ?? const Stream.empty(), builder: (context, snapshot) { log("Stream output is ${snapshot.data} "); if (snapshot.data == BluetoothConnectionState.disconnected) { if (!isDialogup) { WidgetsBinding.instance.addPostFrameCallback( (timeStamp) { setState(() { isDialogup = true; }); AwesomeDialog( context: context, title: "Bluetooth Disconnected", dismissOnTouchOutside: false, desc: "Oops , lost bluetooth connection please try and connect again", btnOkOnPress: () { deviceController.clearConnectedDevice(); Navigator.popUntil( context, ModalRoute.withName("/"), ); }, btnOkText: "Take me to home", btnOkColor: AppColor.greenDarkColor) .show(); }, ); } }Logs