How to clear "scanResults"

[GauravPatni]

HI,

Is there any way to clear "scanResults" ?

It require when we disconnect device & goto connect screen again ,where we call 'FindDevicesScreen' then it shows old devices as snapshot.data of FlutterBlue.instance.scanResults stream gives the last result.

Note that while calling "scan" scanResults list get clears because it internally calls _scanResults.add(<ScanResult>[]);

[Fleximex]

Maybe we can add a clearList() method to the class FlutterBlue. Or change the scan method:

Change

if (timeout != null) {
    killStreams.add(Observable.timer(null, timeout));
}

to

if (timeout != null) {
    killStreams.add(Observable.timer(clearList, timeout).listen(
        (clearList) {
            if (clearList)
            {
                _scanResults = BehaviorSubject.seeded([]);
            }
        }));
}

clearList being a boolean you can pass to the scan method.

[jeanmatthieud]

Or at least add a 'lastScanDate' timestamp to the device to be able to filter devices.

[GauravPatni]

Thanks for the reply . But is there any way to clear scan results without editing package internal code ? as it is difficult to maintain if package version updates....

[928PJY]

So is there an easy way to get the latest available device list? From my usage, when I keep scanning all the device, if I turn off my ble device and turn on it again, since it is not a new device, the listen callback function doesn't get invoked immediately, it looks wired.

[LipJ01]

I know this is an old issue but any chance there is now a way to do this?? When I call repeatedly call startScan(timeout:X) I'm still using the listener from my original scan and it doesn't clear the results. I can't turn bluetooth off and on because I'm trying to maintain multiple connections. Any wizdom appreciated.