protected override void OnCreate(Bundle savedInstanceState)
{
ScannerCode.Log("OnCreate...");
ScannerCode.ScanCount = 0;
base.OnCreate(savedInstanceState);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.Main);
selectScanner = FindViewById <Spinner>(Resource.Id.openReaderSpinner);
openScanner = FindViewById <Android.Widget.Switch>(Resource.Id.openScannerSwitch);
scanData = FindViewById <TextView>(Resource.Id.scanDataView);
scanButton = FindViewById <Button>(Resource.Id.scanButton);
symConfig = FindViewById <Button>(Resource.Id.config_symbologies);
symConfig.Click += SymConfig_Click;
scanButton.Click += ScanButton_Click;
selectScanner.ItemSelected += SelectScanner_ItemSelected;
openScanner.CheckedChange += OpenScanner_CheckedChange;
//pass the context of this activity to the ScannCode class
ScannerCode.AppContext = this.context;
// Register ScanCode events from static instance
ScannerCode.Log("Attach Scan_Result_Event...");
getReaderList();
}
/// <summary>
/// Allows you to pass the scanned data form the ScannerCode.cs to the TextView on this Activity
/// </summary>
/// <param name="Result"></param>
public void On_Result_Event(string Result)//Changed Scan Result event from static instance
{
ScannerCode.Log("Called On_Result_Event..., ScanCount=" + ScannerCode.ScanCount.ToString());
this.RunOnUiThread(() => {//Changed Invoke UI Thread
scanData.SetText(Result, TextView.BufferType.Normal);
});
}
/// <summary>
/// When the ScanPage is about to go to the background, release the
/// scanner.
/// </summary>
protected override void OnPause()
{
ScannerCode.Log("OnPause()...");
base.OnPause();
ScannerCode.CloseBarcodeScanner();
ScannerCode.Update_Event -= On_Update_Event;
ScannerCode.Scan_Result_Event -= On_Result_Event;
}
/// <summary>
/// When the ScanPage is about to go to the foreground, claim the
/// scanner.
/// </summary>
protected override void OnResume()
{
ScannerCode.Log("OnResume()...");
base.OnResume();
ScannerCode.OpenBarcodeReader();
ScannerCode.Scan_Result_Event += new ScannerCode.ScanResult(On_Result_Event);
ScannerCode.Update_Event += new ScannerCode.UpdateControls(On_Update_Event);
//lock the orientationt to Portrait
this.RequestedOrientation = Android.Content.PM.ScreenOrientation.Portrait;
}
/// <summary>
/// Allows Updates to the UI controls from the ScanCode class
/// </summary>
/// <param name="bscanButton"></param>
/// <param name="bscanSpinner"></param>
/// <param name="strViewText"></param>
public void On_Update_Event(bool bscanButton, bool bscanSpinner, bool syConfig, bool bOpenbtn, string strViewText)
{
ScannerCode.Log("On_Update_Event...");
this.RunOnUiThread(() =>
{
scanButton.Enabled = bscanButton;
selectScanner.Enabled = bscanSpinner;
symConfig.Enabled = syConfig;
openScanner.Checked = bOpenbtn;
});
}
/// <summary>
/// Toggles the reader object
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void OpenScanner_CheckedChange(object sender, CompoundButton.CheckedChangeEventArgs e)
{
ScannerCode.mOpenReader = e.IsChecked;
if (ScannerCode.mOpenReader)
{
ScannerCode.OpenBarcodeReader();
}
else
{
ScannerCode.CloseBarcodeScanner();
}
}
private static BarcodeReader GetBarcodeReader(string readerName)
{
ScannerCode.Log("GetBarcodeReader...");
BarcodeReader reader = null;
if (readerName == DEFAULT_READER_KEY)
{
// This name was added to the Open Reader picker list if the
// query for connected barcode readers failed. It is not a
// valid reader name. Set the readerName to null to default
// to internal scanner.
readerName = null;
}
if (null == readerName)
{
if (mBarcodeReaders.ContainsKey(DEFAULT_READER_KEY))
{
reader = mBarcodeReaders[DEFAULT_READER_KEY];
}
}
else
{
if (mBarcodeReaders.ContainsKey(readerName))
{
reader = mBarcodeReaders[readerName];
}
}
if (null == reader)
{
// Create an instance of BarcodeReader.
reader = new BarcodeReader(readerName, AppContext);
// Add an event handler to receive barcode data.
// Even though we may have multiple reader sessions, we only
// have one event handler. In this app, no matter which reader
// the data come frome it will update the same UI controls.
// Add the BarcodeReader object to mBarcodeReaders collection.
if (null == readerName)
{
mBarcodeReaders.Add(DEFAULT_READER_KEY, reader);
}
else
{
mBarcodeReaders.Add(readerName, reader);
}
}
return(reader);
}
/// <summary>
/// gets all the scanner devices in the device list and populates the picker
/// </summary>
private async void getReaderList()
{
//PopulateReaderPicker with the available scanners
scanList = await ScannerCode.PopulateReaderPicker();
if (scanList.Count > 0)
{
adapter = new ArrayAdapter(this, Android.Resource.Layout.SimpleSpinnerItem, (List <string>)scanList);
adapter.SetDropDownViewResource(Android.Resource.Layout.SimpleSpinnerDropDownItem);
selectScanner.Adapter = adapter;
selectScanner.SetSelection(0);
ScannerCode.selectedScanneName = selectScanner.SelectedItem.ToString();
}
}
/// <summary>
/// Updates the settings dictionary with the changes made to switch positions and EditText field content,
/// then enabels the new settings.
/// </summary>
private void UpdateSymbologyDictionary()
{
foreach (KeyValuePair <string, object> sym in symbologyButtons)
{
if (sym.Value.ToString().Contains("Switch"))
{
Switch sw = (Switch)sym.Value;
ScannerCode.settings[sym.Key] = sw.Checked;
}
else
{
EditText et = (EditText)sym.Value;
ScannerCode.settings[sym.Key] = et.Text;
}
}
// Update the settings for the selected scanner
ScannerCode.EnableSymbologies();
}
/// <summary>
/// initiates a software trigger scan
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ScanButton_Click(object sender, EventArgs e)
{
ScannerCode.onScanButtonCLicked(scanData);
}