Good morning.
 
I'm having some troubles trying to instantiate the BarcodeManager. Im following this example:http://techdocs.zebra.com/emdk-for-android/4-0/tutorial/tutBasicScannin…
 
The problem is that, when i try to instantiate the BarcodeManager in the *onOpen* method (barcodeManager = (BarcodeManager)emdkManager.getInstance(EMDKManager.FEATURE_TYPE.BARCODE);) a NullPointerException is thrown.
 
I created the following class:
public class ScannerZebra implements EMDKListener,
                                                                  StatusListener,
                                                                  DataListener {
 
    private String TAG = getClass().getName();
 
    private Context context;
    private EMDKManager emdkManager = null;
    private BarcodeManager barcodeManager = null;
    private Scanner scanner = null;
 
 
    public ScannerZebra(Context context) {
        this.context = context;
 
        EMDKResults results = EMDKManager.getEMDKManager(context, this);
        if (results.statusCode != EMDKResults.STATUS_CODE.SUCCESS) {
            Log.i(TAG, "Error inicializando EMDK");
        }
    }
 
    // Method to initialize and enable Scanner and its listeners    private void initializeScanner() throws ScannerException {
        if (scanner == null) {
            // Get the Barcode Manager object            barcodeManager = (BarcodeManager) emdkManager.getInstance(EMDKManager.FEATURE_TYPE.BARCODE);
            // Get default scanner defined on the device            scanner = barcodeManager.getDevice(BarcodeManager.DeviceIdentifier.DEFAULT);
            // Add data and status listeners            scanner.addDataListener(this);
            scanner.addStatusListener(this);
            // Hard trigger. When this mode is set, the user has to manually            // press the trigger on the device after issuing the read call.            scanner.triggerType = Scanner.TriggerType.HARD;
            // Enable the scanner            scanner.enable();
            // Starts an asynchronous Scan. The method will not turn ON the            // scanner. It will, however, put the scanner in a state in which            // the scanner can be turned ON either by pressing a hardware            // trigger or can be turned ON automatically.            scanner.read();
        }
    }
 
    @Override    public void onOpened(EMDKManager emdkManager) {
        try {
            initializeScanner();
            Log.i(TAG, "ZEBRA inicializado");
        } catch (ScannerException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
 
    @Override    public void onClosed() {
 
    }
 
    @Override    public void onData(ScanDataCollection scanDataCollection) {
        Log.i(TAG, "Datos leídos: " + scanDataCollection.getResult().toString());
    }
 
    @Override    public void onStatus(StatusData statusData) {
 
    }
}
 
Im making the instance on a onCreate Activity method: scannerZebra = new ScannerZebra(getApplicationContext());
 
Searching in this forums i found the following link:
https://developer.zebra.com/thread/31555
BarcodeManager null referenceIt seems the same problem, so i downloaded again the EMDK4.2 libs and reinstalled them (from here: https://portal.motorolasolutions.com/Support/US-EN/Resolution?solutionI…), but this is not solving the problem.
 
What can be happening?
 
Im using Android Studio 2.1.2 over Mac OSX 10.11.5 with a TC75.
 
Thanks and regards.