protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
_fingerprintManagerCompat = FingerprintManagerCompat.From(this);
_cancelation = new global::Android.Support.V4.OS.CancellationSignal();
_sharedPreferences = PreferenceManager.GetDefaultSharedPreferences(this);
//TODO rest shared Preferences: Application.Context.GetSharedPreferences("sampleSharedPreferencesName",FileCreationMode.Private);
SetContentView(Resource.Layout.Main);
_emailEditText = FindViewById <EditText>(Resource.Id.emailEditText);
_passwordEditText = FindViewById <EditText>(Resource.Id.passwordEditText);
_signinButton = FindViewById <Button>(Resource.Id.signinButton);
_registerButton = FindViewById <Button>(Resource.Id.registerButton);
_signinButton.Click += SignInButton_Click;
_registerButton.Click += RegisterButton_Click;
//Register from Shortcut options
if (!string.IsNullOrEmpty(Intent?.Data?.LastPathSegment))
{
if (Intent.Data.LastPathSegment == "register")
{
StartActivity(typeof(RegisterActivity));
}
}
}
public void AuthenticateAndroid(string reason)
{
// CryptoObjectHelper is described in the previous section.
var cryptoHelper = new CryptoObjectHelper();
var context = Android.App.Application.Context;
//if (Android.OS.Build.VERSION.SdkInt >= Android.OS.BuildVersionCodes.M)
//{
// /* ==================================================================================================
// * android api 23 or higher
// * ================================================================================================*/
// var manager = context.GetSystemService(Context.FingerprintService) as FingerprintManager;
// // cancellationSignal can be used to manually stop the fingerprint scanner.
// var cancellationSignal = new Android.OS.CancellationSignal();
// var authenticationCallback = new SimpleAuthCallback();
// // Start the fingerprint scanner.
// manager.Authenticate(cryptoHelper.BuildCryptoObject(), cancellationSignal, FingerprintAuthenticationFlags.None, authenticationCallback, null);
// return;
//}
// Using the Android Support Library v4
var managerCompat = FingerprintManagerCompat.From(context);
// cancellationSignal can be used to manually stop the fingerprint scanner.
var cancellationSignalCompat = new Android.Support.V4.OS.CancellationSignal();
// AuthenticationCallback is a base class that will be covered later on in this guide.
var callbackCompat = new SimpleCompatAuthCallback();
// Start the fingerprint scanner.
managerCompat.Authenticate(cryptoHelper.BuildCompatCryptoObject(), 0, cancellationSignalCompat, callbackCompat, null);
//return new LocalAuthResult(false);
//return Task.FromResult(new LocalAuthResult(false));
}
public bool Login()
{
var retVal = true;
Android.Content.PM.Permission permissionResult = ContextCompat.CheckSelfPermission(context, Manifest.Permission.UseFingerprint);
if (permissionResult == Android.Content.PM.Permission.Granted)
{
}
else
{
// No permission.
// https://developer.android.com/training/permissions/requesting.html
}
FingerprintManagerCompat fingerprintManager = FingerprintManagerCompat.From(context);
const int flags = 0;
CryptoObjectHelper cryptoHelper = new CryptoObjectHelper();
// cancellationSignal - stop scanning
_cancellationSignal = new Android.Support.V4.OS.CancellationSignal();
fingerprintManager = FingerprintManagerCompat.From(context);
// Callback method
FingerprintManagerCompat.AuthenticationCallback authenticationCallback = new AuthResultsCallback();
// Start scanning
fingerprintManager.Authenticate(cryptoHelper.BuildCryptoObject(), flags, _cancellationSignal, authenticationCallback, null);
return(retVal);
}
public override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
fingerprintManager = FingerprintManagerCompat.From(Context);
RetainInstance = true;
CryptObjectHelper = new CryptoObjectHelper();
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.Main);
_fingerprintManager = FingerprintManagerCompat.From(this);
_cancellationSignal = new global::Android.Support.V4.OS.CancellationSignal();
_preferences = Application.Context.GetSharedPreferences("UserInfo", FileCreationMode.Private);
_emailEditText = FindViewById <EditText>(Resource.Id.emailEditText);
_passwordEditText = FindViewById <EditText>(Resource.Id.passwordEditText);
_loginButton = FindViewById <Button>(Resource.Id.loginButton);
_registerButton = FindViewById <Button>(Resource.Id.registerButton);
_loginButton.Click += LoginButton_Click;
_registerButton.Click += RegisterButton_Click;
if (string.IsNullOrEmpty(Intent?.Data?.LastPathSegment))
{
return;
}
if (Intent.Data.LastPathSegment == "register")
{
StartActivity(typeof(RegisterActivity));
}
}
public bool IsFingerprintSupported()
{
if (Android.OS.Build.VERSION.SdkInt < Android.OS.BuildVersionCodes.M)
{
return(false);
}
if (fingerprintManager == null)
{
fingerprintManager = FingerprintManagerCompat.From(activity);
}
if (fingerprintManager == null || !fingerprintManager.IsHardwareDetected)
{
return(false);
}
if (!fingerprintManager.HasEnrolledFingerprints)
{
return(false);
}
if (keyguardManager == null)
{
keyguardManager = (KeyguardManager)activity.GetSystemService(Context.KeyguardService);
}
if (keyguardManager == null || !keyguardManager.IsKeyguardSecure)
{
return(false);
}
return(true);
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
fpm = FingerprintManagerCompat.From(this);
cancel = new Android.Support.V4.OS.CancellationSignal();
sharedPreferences = Application.Context.GetSharedPreferences("UserInfo", FileCreationMode.Private);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.activity_main);
etEmail = FindViewById <EditText>(Resource.Id.etEmail);
etPassword = FindViewById <EditText>(Resource.Id.etPassword);
btnSignIn = FindViewById <Button>(Resource.Id.btnSignIn);
btnSignUp = FindViewById <Button>(Resource.Id.btnSignUp);
btnSignIn.Click += BtnSignIn_Click;
btnSignUp.Click += BtnSignUp_Click;
string Email = Intent.GetStringExtra("email");
etEmail.Text = Email;
string Password = Intent.GetStringExtra("password");
etPassword.Text = Password;
if (!string.IsNullOrEmpty(Intent?.Data?.LastPathSegment))
{
if (Intent.Data.LastPathSegment == "SignUp")
{
var intent = new Intent(this, typeof(SignUpActivity));
StartActivity(intent);
}
}
}
private async Task <bool> Authenticate()
{
var callback = new SimpleAuthCallbacks();
var context = Android.App.Application.Context;
var isUsingFingerprint = ContextCompat.CheckSelfPermission(context, Manifest.Permission.UseFingerprint);
if (isUsingFingerprint == Permission.Granted)
{
var cancellationSignal = new Android.Support.V4.OS.CancellationSignal();
var cryptHelper = new CryptoObjectHelper();
var fingerprintManager = FingerprintManagerCompat.From(context);
fingerprintManager.Authenticate(
cryptHelper.BuildCryptoObject(),
(int)FingerprintAuthenticationFlags.None, /* flags */
cancellationSignal,
callback,
null
);
}
while (callback.IsWaiting)
{
await Task.Delay(87);
}
return(callback.Status == SimpleAuthCallbacks.AuthenticateResult.Success);
}
public void Authenticate(Action successAction, Action failAction)
{
FingerprintManagerCompat fingerprintManager = FingerprintManagerCompat.From(Android.App.Application.Context);
const int flags = 0; /* always zero (0) */
CryptoObjectHelper cryptoHelper = new CryptoObjectHelper();
// Using the Support Library classes for maximum reach
FingerprintManagerCompat fingerPrintManager = FingerprintManagerCompat.From(Android.App.Application.Context);
// AuthCallbacks is a C# class defined elsewhere in code.
FingerprintManagerCompat.AuthenticationCallback authenticationCallback = new AuthenticationCallBack();
var page = new FingerprintAuthenticationPage((int)Android.OS.Build.VERSION.SdkInt);
Xamarin.Forms.Application.Current.MainPage.Navigation.PushPopupAsync(page);
MessagingCenter.Subscribe <string, string>("FingerprintAuthentication", "Authenticate", (sender, arg) =>
{
string result = arg;
if (arg == "true")
{
MessagingCenter.Unsubscribe <string, string>("FingerprintAuthentication", "Authenticate");
Device.BeginInvokeOnMainThread(() =>
{
Xamarin.Forms.Application.Current.MainPage.Navigation.PopPopupAsync();
});
//Do the thing when success to pass
if (successAction != null)
{
successAction.Invoke();
}
}
else if (arg == "false")
{
Device.BeginInvokeOnMainThread(() =>
{
page.SetFailLabelText("Fail to authenticate!");
});
}
else
{
MessagingCenter.Unsubscribe <string, string>("FingerprintAuthentication", "Authenticate");
Device.BeginInvokeOnMainThread(() =>
{
Xamarin.Forms.Application.Current.MainPage.Navigation.PopPopupAsync();
});
//Do the thing when fail to pass
if (failAction != null)
{
failAction.Invoke();
}
}
});
cancellationSignal = new Android.Support.V4.OS.CancellationSignal();
// Here is where the CryptoObjectHelper builds the CryptoObject.
fingerprintManager.Authenticate(cryptoHelper.BuildCryptoObject(), flags, cancellationSignal, authenticationCallback, null);
}
private bool HasEnrolledFingerprints(FingerprintManagerCompat fingerprintManagerCmp = null)
{
try
{
FingerprintManagerCompat fpManager = fingerprintManagerCmp;
if (fpManager == null)
{
fpManager = FingerprintManagerCompat.From(CurrentContext);
}
if (!fpManager.IsHardwareDetected)
{
throw new Exception(Resources.GetString(Resource.String.errFpHWNotDetected));
}
if (!fpManager.HasEnrolledFingerprints)
{
return(false);
}
return(true);
}
catch (Exception ex)
{
Android.Util.Log.Error(App.Title, ex.Message);
return(false);
}
}
Button _startAuthenticationScanButton, _failedScanAgainButton, _showAccountBalanceButton, _transferAccountBalanceButton, _transferBalanceButton;// _scanAgainButton,
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.activity_fingerprintmanager_api);
client = new HttpClient();
InitializeViewReferences();
_fingerprintManager = FingerprintManagerCompat.From(this);
string canScanMsg = CheckFingerprintEligibility();
_startAuthenticationScanButton.Click += StartFingerprintScan;
//_startAuthenticationScanButton.Click += ShowTransferPanel;
//_scanAgainButton.Click += ScanAgainButtonOnClick;
_failedScanAgainButton.Click += RecheckEligibility;
_showAccountBalanceButton.Click += ShowAccountBalance;
_transferAccountBalanceButton.Click += ShowTransferPanel;
_transferBalanceButton.Click += makeTransaction;
if (_canScan)
{
_dialogFrag = FingerprintManagerApiDialogFragment.NewInstance(_fingerprintManager);
}
else
{
ShowError("Can't use this device for the sample.", canScanMsg);
}
}
protected override async Task <GetSecureValueResult> NativeGetSecureValue(SecureValueRequestConfiguration secureValueRequestConfig, CancellationToken cancellationToken)
{
var currentActivity = CrossFingerprint.CurrentActivity;
var _fingerprintManager = FingerprintManagerCompat.From(currentActivity);
var taskCompletionSource = new TaskCompletionSource <AuthenticationCallbackResult>();
byte[] iv;
byte[] value;
try
{
var prefs = Application.Context.GetSharedPreferences(prefsName, FileCreationMode.Private);
iv = Convert.FromBase64String(prefs.GetString($"{secureValueRequestConfig.Key}:iv", null));
value = Convert.FromBase64String(prefs.GetString($"{secureValueRequestConfig.Key}:value", null));
}
catch (Exception ex)
{
return(new GetSecureValueResult
{
Status = FingerprintAuthenticationResultStatus.UnknownError,
ErrorMessage = $"No values for {secureValueRequestConfig.Key}"
});
}
try
{
_fingerprintManager.Authenticate(CryptoObjectHelper.Instance.BuildCryptoObject(CipherMode.DecryptMode, iv),
(int)FingerprintAuthenticationFlags.None,
new CancellationSignal(),
new AuthenticationCallback(value, taskCompletionSource),
null);
var fragment = CrossFingerprint.CreateSecureValueDialogFragment();
var result = await fragment.ShowAsync(secureValueRequestConfig, taskCompletionSource, cancellationToken);
if (result.Status == FingerprintAuthenticationResultStatus.Succeeded)
{
return(new GetSecureValueResult
{
Status = result.Status,
Value = System.Text.Encoding.UTF8.GetString(result.Result),
});
}
return(new GetSecureValueResult
{
Status = result.Status,
// Pass through error info?
});
}
catch (Exception ex)
{
return(new GetSecureValueResult
{
Status = FingerprintAuthenticationResultStatus.UnknownError,
ErrorMessage = ex.Message
});
}
}
public static FingerprintManagerApiDialogFragment NewInstance(FingerprintManagerCompat fingerprintManager)
{
FingerprintManagerApiDialogFragment frag = new FingerprintManagerApiDialogFragment
{
_fingerprintManager = fingerprintManager
};
return frag;
}
public override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
_fingerprintManager = FingerprintManagerCompat.From(Context);
RetainInstance = true;
CryptObjectHelper = new CryptoObjectHelper();
SetStyle(DialogFragmentStyle.Normal, Res.Style.ThemeMaterialLightDialog);
}
public static FingerprintManagerApiDialogFragment NewInstance(FingerprintManagerCompat fingerprintManager)
{
FingerprintManagerApiDialogFragment frag = new FingerprintManagerApiDialogFragment
{
_fingerprintManager = fingerprintManager
};
return(frag);
}
internal FingerprintManagerFragment(string alertTitle, string alertMessage, TaskCompletionSource <AuthenticationResult> tcs)
{
_fingerprintManager = FingerprintManagerCompat.From(MainApplication.CurrentActivity);
_alertTitle = alertTitle;
_alertMessage = alertMessage;
_cryptObjectHelper = new CryptoObjectHelper();
_cancellationSignal = new CancellationSignal();
_tcsWeak = new WeakReference <TaskCompletionSource <AuthenticationResult> >(tcs);
}
public void InitReader()
{
m_fingerprintManager = FingerprintManagerCompat.From(Application.Context);
//make sure hardware is available
if (!m_fingerprintManager.IsHardwareDetected)
{
return;
}
m_ready = true;
}
public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
View v = inflater.Inflate(Resource.Layout.fragment_settings, container, false);
spinner = (Spinner)v.FindViewById(Resource.Id.alarmSpinner);
SetupSpinner(v);
enablefingerprint = v.FindViewById <Switch>(Resource.Id.fingerPrintSwitch);
enablePin = v.FindViewById <Switch>(Resource.Id.pin_switch);
_version = v.FindViewById <TextView>(Resource.Id.tv_version);
string ver = Context.PackageManager.GetPackageInfo(Context.PackageName, 0).VersionName;
_version.Text = "Versiunea " + ver;
_tvDevicesManagement = v.FindViewById <TextView>(Resource.Id.devices);
_rlMedicineTitle = v.FindViewById <RelativeLayout>(Resource.Id.medicine_relative);
_tvDeviceTitle = v.FindViewById <TextView>(Resource.Id.tv_devices);
_tvMedicineTitle = v.FindViewById <TextView>(Resource.Id.tv_medicine);
_tvDevicesManagement.Click += (sender, args) =>
Activity.StartActivity(typeof(DevicesManagementActivity));
FingerprintManagerCompat checkHardware;
checkHardware = FingerprintManagerCompat.From(Activity);
var fingerprint = Convert.ToBoolean(Utils.GetDefaults("fingerprint"));
if (!checkHardware.IsHardwareDetected)
{
enablefingerprint.Enabled = false;
}
enablefingerprint.Checked = fingerprint;
enablePin.Checked = !string.IsNullOrEmpty(Utils.GetDefaults("UserPin"));
enablefingerprint.CheckedChange += Enablefingerprint_CheckedChange;
enablePin.CheckedChange += EnablePin_CheckedChange;
if (int.Parse(Utils.GetDefaults("UserType")) == 2)
{
_tvDevicesManagement.Visibility = ViewStates.Visible;
_tvDeviceTitle.Visibility = ViewStates.Visible;
}
if (int.Parse(Utils.GetDefaults("UserType")) == 1)
{
_tvDevicesManagement.Visibility = ViewStates.Gone;
_tvDeviceTitle.Visibility = ViewStates.Gone;
}
if (int.Parse(Utils.GetDefaults("UserType")) == 2)
{
spinner.Visibility = ViewStates.Gone;
_rlMedicineTitle.Visibility = ViewStates.Gone;
_tvMedicineTitle.Visibility = ViewStates.Gone;
}
SetViewSettingsForTrackerActivity(v);
return(v);
}
/// <summary>
/// Inizializza lo scanner per l'impronta digitale
/// </summary>
public void Init()
{
try
{
FingerprintManagerCompat fingerprintManagerCmp = FingerprintManagerCompat.From(CurrentContext);
if (!fingerprintManagerCmp.IsHardwareDetected)
{
throw new Exception(Resources.GetString(Resource.String.errFpHWNotDetected));
}
// Il dispositivo deve essere protetto da blocca schermo, altrimenti non si può usare
// l'impronta digitale
KeyguardManager keyguardManager = (KeyguardManager)CurrentContext.GetSystemService(Context.KeyguardService);
if (!keyguardManager.IsKeyguardSecure)
{
throw new Exception(Resources.GetString(Resource.String.errFpLockScreen));
}
// Verifica la presenza della registrazione di almeno una impronta digitale
if (!HasEnrolledFingerprints(fingerprintManagerCmp))
{
throw new Exception(Resources.GetString(Resource.String.errFpNotFound));
}
// Verifica delle autorizzazioni da Android 6 in poi
if (Build.VERSION.SdkInt >= BuildVersionCodes.M)
{
Android.Content.PM.Permission permissionResult = ContextCompat.CheckSelfPermission(CurrentContext, USE_FINFERPRINT_PERMISSION);
if (permissionResult == Android.Content.PM.Permission.Granted)
{
FingerprintManager = fingerprintManagerCmp;
}
else
{
// No permission. Go and ask for permissions and don't start the scanner. See
// https://developer.android.com/training/permissions/requesting.html
MainActivity.Instance.RequestPermissions(new[] { USE_FINFERPRINT_PERMISSION }, 0);
// Verifico di nuovo i permessi
permissionResult = ContextCompat.CheckSelfPermission(CurrentContext, USE_FINFERPRINT_PERMISSION);
if (permissionResult != Android.Content.PM.Permission.Granted)
{
throw new Exception(Resources.GetString(Resource.String.errFpPermissionDenied));
}
}
}
}
catch (Exception)
{
FingerprintManager = null;
throw;
}
}
public bool IsHardwareDetected()
{
FingerprintManagerCompat fingerprintManager = FingerprintManagerCompat.From(Android.App.Application.Context);
if (!fingerprintManager.IsHardwareDetected)
{
return(false);
}
else
{
return(true);
}
}
public bool IsFingerPrintEnrolled()
{
FingerprintManagerCompat fingerprintManager = FingerprintManagerCompat.From(Android.App.Application.Context);
if (!fingerprintManager.HasEnrolledFingerprints)
{
return(false);
}
else
{
return(true);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="T:Xamarin.Android.Fingerprint.FingerprintAuthenticator"/> class.
/// </summary>
/// <param name="context">Context.</param>
/// <param name="callbacks">Callbacks.</param>
public FingerprintAuthenticator(Context context, IFingerprintAuthenticatorCallbacks callbacks)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (callbacks == null)
{
throw new ArgumentNullException(nameof(callbacks));
}
_authenticationCallback = callbacks;
_fingerprintManager = FingerprintManagerCompat.From(context);
}
/// <summary>
/// Initialize fingerprint authentication mechanism
/// </summary>
/// <param name="activity">Root activity</param>
public static void FingerprintAuthenticate(Activity activity)
{
FingerprintManagerCompat fingerprint = FingerprintManagerCompat.From(activity);
KeyguardManager keyGuard = activity.GetSystemService(Context.KeyguardService) as KeyguardManager;
Android.Content.PM.Permission permission = activity.CheckSelfPermission(Android.Manifest.Permission.UseFingerprint);
if (fingerprint.IsHardwareDetected &&
keyGuard.IsKeyguardSecure &&
fingerprint.HasEnrolledFingerprints &&
permission == Android.Content.PM.Permission.Granted)
{
const int flags = 0;
CryptoObjectFactory cryptoHelper = new CryptoObjectFactory();
FingerprintManagerCompat.AuthenticationCallback authCallback = new AuthCallback(activity as Activities.LoginActivity);
fingerprint.Authenticate(cryptoHelper.BuildCryptoObject(), flags, new Android.Support.V4.OS.CancellationSignal(), authCallback, null);
}
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.activity_fingerprintmanager_api);
InitializeViewReferences();
_fingerprintManager = FingerprintManagerCompat.From(this);
string canScanMsg = CheckFingerprintEligibility();
_startAuthenticationScanButton.Click += StartFingerprintScan;
_scanAgainButton.Click += ScanAgainButtonOnClick;
_failedScanAgainButton.Click += RecheckEligibility;
if (_canScan)
{
_dialogFrag = FingerprintManagerApiDialogFragment.NewInstance(_fingerprintManager);
}
else
{
Toast.MakeText(this, "No se puede utilizar escaneo de huella dactilar en el dispositivo. " + canScanMsg, ToastLength.Long).Show();
OnBackPressed();
return;
}
Permission permissionResult = ContextCompat.CheckSelfPermission(this,
Manifest.Permission.UseFingerprint);
if (permissionResult == Permission.Granted)
{
_initialPanel.Visibility = ViewStates.Gone;
_authenticatedPanel.Visibility = ViewStates.Gone;
_errorPanel.Visibility = ViewStates.Gone;
_scanInProgressPanel.Visibility = ViewStates.Visible;
_dialogFrag.Init();
_dialogFrag.Show(FragmentManager, DIALOG_FRAGMENT_TAG);
}
else
{
Snackbar.Make(FindViewById(Res.Id.Content),
Resource.String.missing_fingerprint_permissions,
Snackbar.LengthLong)
.Show();
}
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
Xamarin.Essentials.Platform.Init(this, savedInstanceState);
fingerprintManager = FingerprintManagerCompat.From(this);
cancellation = new Android.Support.V4.OS.CancellationSignal();
preferences = Application.Context.GetSharedPreferences("UserInfo", FileCreationMode.Private);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.Main);
emailEditText = FindViewById <EditText>(Resource.Id.emailEditText);
passwordEditText = FindViewById <EditText>(Resource.Id.passwordEditText);
signinButton = FindViewById <Button>(Resource.Id.signinButton);
registerButton = FindViewById <Button>(Resource.Id.registerButton);
signinButton.Click += SigninButton_Click;
registerButton.Click += RegisterButton_Click;
}
public bool IsSupported()
{
var context = Android.App.Application.Context;
if (Android.OS.Build.VERSION.SdkInt >= Android.OS.BuildVersionCodes.M)
{
/* ==================================================================================================
* android api 23 or higher
* ================================================================================================*/
var manager = context.GetSystemService(Context.FingerprintService) as FingerprintManager;
var rs = manager.IsHardwareDetected;
return(rs);
}
// Using the Android Support Library v4
var managerCompat = FingerprintManagerCompat.From(context);
var rs2 = managerCompat.IsHardwareDetected;
return(rs2);
}
public Task <bool> Scan()
{
tcs = new TaskCompletionSource <bool>();
var Context = Android.App.Application.Context;
// Using the Android Support Library v4
FingerprintManagerCompat fingerprintManager = FingerprintManagerCompat.From(Context);
if (!fingerprintManager.IsHardwareDetected)
{
Toast.MakeText(Context, "FingerPrint authentication permission not enable", ToastLength.Short).Show();
tcs.SetResult(false);
return(tcs.Task);
}
if (!fingerprintManager.HasEnrolledFingerprints)
{
Toast.MakeText(Context, "Register at least one fingerprint in Settings", ToastLength.Short).Show();
}
else
{
const int flags = 0; /* always zero (0) */
// CryptoObjectHelper is described in the previous section.
CryptoObjectHelper cryptoHelper = new CryptoObjectHelper();
// cancellationSignal can be used to manually stop the fingerprint scanner.
var cancellationSignal = new Android.Support.V4.OS.CancellationSignal();
// AuthenticationCallback is a base class that will be covered later on in this guide.
//FingerprintManagerCompat.AuthenticationCallback authenticationCallback = new MyAuthCallbackSample(this);
// Start the fingerprint scanner.
fingerprintManager.Authenticate(cryptoHelper.BuildCryptoObject(), flags, cancellationSignal, this, null);
Toast.MakeText(Context, "Put your finger to scan", ToastLength.Short).Show();
}
return(tcs.Task);
}
public void fingerPrintDetection(Activity context)
{
// Using the Android Support Library v4
FingerprintManagerCompat fingerprintManager = FingerprintManagerCompat.From(context);
if (fingerprintManager.IsHardwareDetected)
{
if (fingerprintManager.HasEnrolledFingerprints)
{
// The context is typically a reference to the current activity.
Android.Content.PM.Permission permissionResult = ContextCompat.CheckSelfPermission(context, Manifest.Permission.UseFingerprint);
if (permissionResult == Android.Content.PM.Permission.Granted)
{
// Permission granted - go ahead and start the fingerprint scanner.
CryptoObjectHelper cryptoHelper = new CryptoObjectHelper();
var cancellationSignal = new Android.Support.V4.OS.CancellationSignal();
// AuthCallbacks is a C# class defined elsewhere in code.
FingerprintManagerCompat.AuthenticationCallback authenticationCallback = new SimpleAuthCallbacks(context);
// Here is where the CryptoObjectHelper builds the CryptoObject.
fingerprintManager.Authenticate(cryptoHelper.BuildCryptoObject(), (int)FingerprintAuthenticationFlags.None, cancellationSignal, authenticationCallback, null);
}
else
{
// No permission. Go and ask for permissions and don't start the scanner. See
// http://developer.android.com/training/permissions/requesting.html
}
}
else
{
//user has not enrolled for fingerprint
}
}
else
{
//Device is not compatible for fingerprint scanning
}
}
public void CheckFingerPrint()
{
try
{
FingerprintManagerCompat fingerprintManager = FingerprintManagerCompat.From(this);
KeyguardManager keyguardManager = GetSystemService(KeyguardService) as KeyguardManager;
App.AndroidFingerPrintSupported = fingerprintManager.IsHardwareDetected && keyguardManager.IsKeyguardSecure && fingerprintManager.HasEnrolledFingerprints;
CrossFingerprint.SetCurrentActivityResolver(() => CrossCurrentActivity.Current.Activity);//Register FingerScan Nuget
}
catch (Exception e)
{
}
//if (!keyguardManager.IsKeyguardSecure)
//{
//}
//if (!fingerprintManager.HasEnrolledFingerprints)
//{
// // Can't use fingerprint authentication - notify the user that they need to
// // enroll at least one fingerprint with the device.
//}
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.activity_fingerprintmanager_api);
InitializeViewReferences();
_fingerprintManager = FingerprintManagerCompat.From(this);
string canScanMsg = CheckFingerprintEligibility();
_startAuthenticationScanButton.Click += StartFingerprintScan;
_scanAgainButton.Click += ScanAgainButtonOnClick;
_failedScanAgainButton.Click += RecheckEligibility;
if (_canScan)
{
_dialogFrag = FingerprintManagerApiDialogFragment.NewInstance(_fingerprintManager);
}
else
{
ShowError("Can't use this device for the sample.", canScanMsg);
}
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// Set our view from the "FingerprintAuthorization" layout resource
SetContentView(Resource.Layout.FingerprintAuthorization);
sharedPreferences = PreferenceManager.GetDefaultSharedPreferences(this);
fingerprintManagerCompat = FingerprintManagerCompat.From(this);
cancelationSignal = new Android.Support.V4.OS.CancellationSignal();
fingerprintStatusTextView = FindViewById <TextView>(Resource.Id.tvFingerprintStatusTextView);
buttonAuthenticate = FindViewById <Button>(Resource.Id.buttonFingerPrintAuthenticate);
buttonReset = FindViewById <Button>(Resource.Id.buttonFingerPrintReset);
FindViewById <ProgressBar>(Resource.Id.pbFingerprintAuthenticationProgressBar).Visibility = ViewStates.Invisible;
buttonAuthenticate.Click += (sender, e) => {
// Implementation
FindViewById <ProgressBar>(Resource.Id.pbFingerprintAuthenticationProgressBar).Visibility = ViewStates.Visible;
if (CanUseFingerprintBiometric())
{
LogUserIn();
}
else
{
FindViewById <ProgressBar>(Resource.Id.pbFingerprintAuthenticationProgressBar).Visibility = ViewStates.Invisible;
Toast.MakeText(this, "This device is not configured for Fingerprint Biometrics", ToastLength.Long).Show();
}
};
buttonReset.Click += (sender, e) => {
// Implementation
FindViewById <ProgressBar>(Resource.Id.pbFingerprintAuthenticationProgressBar).Visibility = ViewStates.Invisible;
fingerprintStatusTextView.Text = "You Must Authenticate";
};
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
Xamarin.Forms.Forms.Init(this, savedInstanceState);
Xamarin.Essentials.Platform.Init(this, savedInstanceState);
SetContentView(Resource.Layout.activity_fingerprintmanager_api);
InitializeViewReferences();
_fingerprintManager = FingerprintManagerCompat.From(this);
string canScanMsg = CheckFingerprintEligibility();
_startAuthenticationScanButton.Click += StartFingerprintScan;
_failedScanAgainButton.Click += RecheckEligibility;
if (_canScan)
{
_dialogFrag = FingerprintManagerApiDialogFragment.NewInstance();
}
else
{
ShowError("Can't use this device for the sample.", canScanMsg);
}
}
public override void OnAuthenticationSucceeded(FingerprintManagerCompat.AuthenticationResult result)
{
Log.Debug(TAG, "OnAuthenticationSucceeded");
if (result.CryptoObject.Cipher != null)
{
try
{
// Calling DoFinal on the Cipher ensures that the encryption worked.
byte[] doFinalResult = result.CryptoObject.Cipher.DoFinal(SECRET_BYTES);
Log.Debug(TAG, "Fingerprint authentication succeeded, doFinal results: {0}",
Convert.ToBase64String(doFinalResult));
ReportSuccess();
}
catch (BadPaddingException bpe)
{
Log.Error(TAG, "Failed to encrypt the data with the generated key." + bpe);
ReportAuthenticationFailed();
}
catch (IllegalBlockSizeException ibse)
{
Log.Error(TAG, "Failed to encrypt the data with the generated key." + ibse);
ReportAuthenticationFailed();
}
}
else
{
// No cipher used, assume that everything went well and trust the results.
Log.Debug(TAG, "Fingerprint authentication succeeded.");
ReportSuccess();
}
}