Decode Listener
Register an IReadListener in your Activity.OnResume() to receive read events on successful barcode reads:
protected override void OnResume(){ base.OnResume(); if (decoder == null) { decoder = new BarcodeManager(); } try { decoder.AddReadListener(this); } catch (DecodeException e) { Log.Error(LOGTAG, "Error while trying to bind a listener to BarcodeManager", e); }}Unregister the IReadListener in your Acvivity.onPause():
protected override void OnPause(){ base.OnPause(); if (decoder != null) { try { decoder.RemoveReadListener(this); } catch (Exception e) { Log.Error(LOGTAG, "Error while trying to remove a listener from BarcodeManager", e); } }}The actual barcode scanning is started via any physical scan trigger on the device. Though to start scanning when a button on the application is pressed, you need to call BarcodeManager.StartDecode() .