flutter_datawedge

A Flutter package communicate with Zebra DataWedge scanners.

Getting Started (under development)

Example

Initialize the FlutterDataWedge Object and attach a listener to the onScanResult Stream.

    FlutterDataWedge dw = FlutterDataWedge(profileName: "Example Profile");
    await dw.initialize();
    StreamSubscription onScanSubscription = dw.onScanResult.listen((ScanResult result) {
        print(result.data);
    });
    
    [...]
    
    // Stop listening for new scans.
    onScanSubscription.cancel();
    dw.dispose();

dispose() will close all Streams.

Also checkout the example application.

async/await

Event though the public methods enableScanner(), activateScanner() and scannerControl() are asynchronous they return as soon as the command is executed. Each of these methods (as well as initialize()) will cause ActionResult objects to be emitted on the onScannerEvent Stream. Those can be used to determine the outcome of a command and properly wait for it. Here is a short example:

    FlutterDataWedge dw = FlutterDataWedge(profileName: "Example Profile");
    await dw.initialize();
    
    // This would be a properly awaited version of enableScanner
    Future<ActionResult> enableScanner() {
        final completer = Completer<ActionResult>();
        final myIdentifier = "someIdentifier";
        
        StreamSubscription onScannerEventSubscription = dw.onScannerEvent.listen((ActionResult result) {
            if (result.commandIdentifier == myIdentifier) {
                completer.complete(result);
            }
        });
        
        
        dw.enablescanner(true,commandIdentifier: myIdentifier);
        
        return completer.future;
    }

Acknowledgements

The package was started by rafaeljustinox and and contains contributions by LenhartStephan. It is now maintained by Circus Kitchens.