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feat(TE-726): Introduces NFC for Xamarin Android Native Examples App
* (Native SDK binaries with the latest changes not yet included)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,177 @@ | ||
| using System; | ||
|
|
||
| using Android.App; | ||
| using Android.Content; | ||
| using Android.OS; | ||
| using Android.Views; | ||
| using IO.Anyline.Camera; | ||
| using IO.Anyline.View; | ||
|
|
||
| using Android.Support.V7.App; | ||
| using Android.Util; | ||
| using IO.Anyline.Plugin.ID; | ||
| using IO.Anyline.Plugin; | ||
| using Anyline.Droid.NFC; | ||
|
|
||
| namespace AnylineExamples.Droid.NFC | ||
| { | ||
| [Activity(Label = "", MainLauncher = false, //ScreenOrientation = Android.Content.PM.ScreenOrientation.Portrait, | ||
| HardwareAccelerated = true)] | ||
| public class MRZScanActivity : AppCompatActivity, IScanResultListener | ||
| { | ||
| public static readonly string TAG = typeof(ScanActivity).Name; | ||
|
|
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| private ScanView _scanView; | ||
| private bool _isInitialized = false; | ||
|
|
||
| public MRZScanActivity() | ||
| { | ||
| } | ||
|
|
||
| protected override void OnCreate(Bundle bundle) | ||
| { | ||
| base.OnCreate(bundle); | ||
|
|
||
| try | ||
| { | ||
| SupportActionBar.SetHomeButtonEnabled(true); | ||
| SupportActionBar.SetDisplayHomeAsUpEnabled(true); | ||
|
|
||
| // we pass the title from the previous activity | ||
| Title = Intent.GetStringExtra("title"); | ||
|
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| Window.SetFlags(WindowManagerFlags.KeepScreenOn, WindowManagerFlags.KeepScreenOn); | ||
| SetContentView(Resource.Layout.scan_activity); | ||
|
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| _scanView = FindViewById<ScanView>(Resource.Id.scan_view); | ||
|
|
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| // the initialization parses the json configuration and builds the whole use-case | ||
| _scanView.Init("id_config_mrz.json"); | ||
|
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| // Activates Face Detection if the MRZ Scanner was initialized | ||
| (((_scanView.ScanViewPlugin as IdScanViewPlugin)?.ScanPlugin as IdScanPlugin)?.IdConfig as MrzConfig)?.EnableFaceDetection(true); | ||
|
|
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| _scanView.ScanViewPlugin.AddScanResultListener(this); | ||
|
|
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| // handle camera open events | ||
| _scanView.CameraOpened += ScanView_CameraOpened; | ||
|
|
||
| // handle camera error events | ||
| _scanView.CameraError += ScanView_CameraError; | ||
|
|
||
| _isInitialized = true; | ||
| } | ||
| catch (Exception e) | ||
| { | ||
| Util.ShowError(e.ToString(), this); | ||
| } | ||
| } | ||
|
|
||
| protected override void OnResume() | ||
| { | ||
| base.OnResume(); | ||
|
|
||
| try | ||
| { | ||
| if (_isInitialized) | ||
| _scanView.Start(); | ||
| } | ||
| catch (Exception e) | ||
| { | ||
| Log.Debug(TAG, e.ToString()); | ||
| } | ||
| } | ||
|
|
||
| protected override void OnPause() | ||
| { | ||
| base.OnPause(); | ||
| StopScanning(); | ||
| } | ||
|
|
||
| private void ScanView_CameraError(object sender, CameraErrorEventArgs e) | ||
| { | ||
| Log.Debug(TAG, e.ToString()); | ||
| } | ||
|
|
||
| private void ScanView_CameraOpened(object sender, CameraOpenedEventArgs args) | ||
| { | ||
|
|
||
| } | ||
|
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| public void OnResult(Java.Lang.Object result) | ||
| { | ||
| var scanResult = result as ScanResult; | ||
|
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| var mrzIdentification = scanResult.Result as MrzIdentification; | ||
|
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|
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| // Gets the data necessary for the NFC reading | ||
| string passportNumber = mrzIdentification.DocumentNumber.Trim(); | ||
| Java.Util.Date dateOfBirth = mrzIdentification.DateOfBirthObject; | ||
| Java.Util.Date expirationDate = mrzIdentification.DateOfExpiryObject; | ||
| var dateFormat = new Android.Icu.Text.SimpleDateFormat("yyMMdd"); | ||
|
|
||
| // The passport number passed to the NFC chip must have a trailing < if there is one in the MRZ string. | ||
| string passportNumberForNFC = string.Copy(passportNumber); | ||
|
|
||
| while (passportNumberForNFC.Length < 9) | ||
| { | ||
| passportNumberForNFC += "<"; | ||
| } | ||
|
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||
| // Open the Activity responsible for listening to the NFC calls and reading the chip. | ||
| // We use data from the MRZ to authenticate with the chip. | ||
|
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| var nfcActivity = new Intent(this, typeof(NFCScanActivity)); | ||
| nfcActivity.PutExtra("pn", passportNumberForNFC); | ||
| nfcActivity.PutExtra("db", dateFormat.Format(dateOfBirth)); | ||
| nfcActivity.PutExtra("de", dateFormat.Format(expirationDate)); | ||
| StartActivity(nfcActivity); | ||
| } | ||
|
|
||
| #region going back & cleanup | ||
| public override bool OnOptionsItemSelected(IMenuItem item) | ||
| { | ||
| switch (item.ItemId) | ||
| { | ||
| case Android.Resource.Id.Home: | ||
| StopScanning(); | ||
| Finish(); | ||
| return true; | ||
| default: | ||
| return base.OnOptionsItemSelected(item); | ||
| } | ||
| } | ||
|
|
||
| private void StopScanning() | ||
| { | ||
| if (_scanView != null) | ||
| { | ||
| _scanView.Stop(); | ||
| _scanView.CameraView.ReleaseCamera(); | ||
| } | ||
| } | ||
|
|
||
| protected override void Dispose(bool disposing) | ||
| { | ||
| base.Dispose(disposing); | ||
| try | ||
| { | ||
| if (_scanView != null) | ||
| { | ||
| _scanView.Dispose(); | ||
| _scanView.CameraOpened -= ScanView_CameraOpened; | ||
| _scanView.CameraError -= ScanView_CameraError; | ||
| _scanView = null; | ||
|
|
||
| GC.Collect(); | ||
|
|
||
| _isInitialized = false; | ||
| } | ||
| } | ||
| catch (Exception) { } | ||
| Finish(); | ||
| } | ||
| #endregion | ||
| } | ||
| } |
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