/// <summary>
/// Sets the AddBarcodeDeviceListener for device connection status.
/// </summary>
/// <param name="context">This parameter needs to be a type of Android.Content.Context.
/// It can be an activity or application context.</param>
private void SetBarcodeDeviceListener(object context)
{
if (sBarcodeDeviceEventHandler != null)
{
return;
}
Task.Run(() =>
{
lock (mProfileFixLock)
{
lock (mOpenLock)
{
using var barcodeReaderManager = BarcodeReaderManager.Create((Context)context);
if (mAidcManager == null)
{
mAidcManager = barcodeReaderManager.Init();
}
}
sBarcodeDeviceEventHandler = new BarcodeDeviceEventHandler(this);
mAidcManager.AddBarcodeDeviceListener(sBarcodeDeviceEventHandler);
}
});
}
/// <summary>
/// Returns an instance of the BarcodeReaderManager object.
/// Note: The context parameter is only used the first time this method
/// is called to create the BarcodeReaderManager object. The subsequent
/// calls will simply return the existing BarcodeReaderManager object.
/// It will get the application context from the context parameter.
/// Even if this method is called from different Activity classes,
/// their application context is the same.
/// </summary>
/// <param name="context">An activity or application context.</param>
/// <returns></returns>
internal static BarcodeReaderManager Create(Context context)
{
lock (oCreateLock)
{
if (sInstance == null)
{
sInstance = new BarcodeReaderManager(context);
}
return(sInstance);
}
}
/// <summary>
/// Gets a list of barcode readers that are currently connected.
/// </summary>
/// <param name="context">This is an optional parameter default to null.
/// On Android platform, it will use Android.App.Application.Context if
/// the parameter value is null. If the parameter is not null, then it
/// needs to be a type of Android.Content.Context. It can
/// be either an activity or application context.</param>
/// <returns>A list of <see cref="T:DevFromDownUnder.Honeywell.DataCollection.BarcodeReaderInfo" /> objects representing
/// barcode readers that are currently connected.</returns>
public static async Task <IList <BarcodeReaderInfo> > GetConnectedBarcodeReaders(object context = null)
{
if (context == null)
{
context = Application.Context;
}
else if (!(context is Context))
{
throw new ArgumentException("Invalid context type, must be Android.Content.Context.", "context");
}
return(await Task.Run(() =>
{
lock (mOpenLock)
{
using BarcodeReaderManager barcodeReaderManager = BarcodeReaderManager.Create((Context)context);
barcodeReaderManager.Init();
return barcodeReaderManager.ListConnectedBarcodeDevices();
}
}));
}
private Result OpenReader(string scannerName, Context context)
{
var result = new Result(Result.Codes.SUCCESS, "Reader successfully claimed.");
if (!mReaderOpened)
{
try
{
if (mAidcBarcodeReader == null)
{
lock (mOpenLock)
{
var manager = BarcodeReaderManager.Create(context);
if (manager != null)
{
mAidcManager = manager.Init();
mAidcBarcodeReader = mAidcManager.CreateBarcodeReader(scannerName);
try
{
mAidcBarcodeReader.SetProperty("TRIG_CONTROL_MODE", "autoControl");
}
catch (Com.Honeywell.Aidc.UnsupportedPropertyException)
{
result.Code = Result.Codes.INTERNAL_ERROR;
result.Message = "Failed to set trigger control mode.";
}
if (result.Code == Result.Codes.SUCCESS)
{
mBarcodeEventHandler = new BarcodeEventHandler(this);
mAidcBarcodeReader.AddBarcodeListener(mBarcodeEventHandler);
}
}
else
{
result.Code = Result.Codes.INTERNAL_ERROR;
result.Message = "Manager has been disposed.";
}
}
}
if (result.Code == Result.Codes.SUCCESS)
{
try
{
mAidcBarcodeReader.Claim();
mReaderOpened = true;
BarcodeReaderProfileHandler.Instance.LoadProfileOccurred += LoadProfileOccurred;
}
catch (Com.Honeywell.Aidc.ScannerUnavailableException)
{
result.Code = Result.Codes.INTERNAL_ERROR;
result.Message = "Reader is not available.";
}
}
}
catch (Java.Lang.Exception ex)
{
result.Code = Result.Codes.EXCEPTION;
result.Message = ex.Message;
}
catch (Exception ex)
{
result.Code = Result.Codes.EXCEPTION;
result.Message = ex.Message;
}
}
else
{
result.Code = Result.Codes.READER_ALREADY_OPENED;
result.Message = "Reader was already opened.";
}
return(result);
}
