private bool InitFingerprintUnlock()
{
Kp2aLog.Log("InitFingerprintUnlock");
if (_biometryIdentifier != null)
{
Kp2aLog.Log("Already listening for fingerprint!");
return(true);
}
var btn = FindViewById <ImageButton>(Resource.Id.fingerprintbtn);
try
{
FingerprintUnlockMode um;
Enum.TryParse(PreferenceManager.GetDefaultSharedPreferences(this).GetString(App.Kp2a.GetDbForQuickUnlock().CurrentFingerprintModePrefKey, ""), out um);
btn.Visibility = (um != FingerprintUnlockMode.Disabled) ? ViewStates.Visible : ViewStates.Gone;
if (um == FingerprintUnlockMode.Disabled)
{
_biometryIdentifier = null;
return(false);
}
if (um == FingerprintUnlockMode.QuickUnlock && Util.GetCloseDatabaseAfterFailedBiometricQuickUnlock(this))
{
maxNumFailedAttempts = 3;
}
BiometricModule fpModule = new BiometricModule(this);
Kp2aLog.Log("fpModule.IsHardwareAvailable=" + fpModule.IsHardwareAvailable);
if (fpModule.IsHardwareAvailable) //see FingerprintSetupActivity
{
_biometryIdentifier = new BiometricDecryption(fpModule, App.Kp2a.GetDbForQuickUnlock().CurrentFingerprintPrefKey, this,
App.Kp2a.GetDbForQuickUnlock().CurrentFingerprintPrefKey);
}
if ((_biometryIdentifier == null) && (!BiometricDecryption.IsSetUp(this, App.Kp2a.GetDbForQuickUnlock().CurrentFingerprintPrefKey)))
{
try
{
Kp2aLog.Log("trying Samsung Fingerprint API...");
_biometryIdentifier = new BiometrySamsungIdentifier(this);
btn.Click += (sender, args) =>
{
if (_biometryIdentifier.Init())
{
if (numFailedAttempts < maxNumFailedAttempts)
{
_biometryIdentifier.StartListening(this);
}
}
};
Kp2aLog.Log("trying Samsung Fingerprint API...Seems to work!");
}
catch (Exception)
{
Kp2aLog.Log("trying Samsung Fingerprint API...failed.");
_biometryIdentifier = null;
}
}
if (_biometryIdentifier == null)
{
FindViewById <ImageButton>(Resource.Id.fingerprintbtn).Visibility = ViewStates.Gone;
return(false);
}
if (_biometryIdentifier.Init())
{
Kp2aLog.Log("successfully initialized fingerprint.");
btn.SetImageResource(Resource.Drawable.ic_fp_40px);
_biometryIdentifier.StartListening(this);
return(true);
}
else
{
Kp2aLog.Log("failed to initialize fingerprint.");
HandleFingerprintKeyInvalidated();
}
}
catch (Exception e)
{
Kp2aLog.Log("Error initializing Fingerprint Unlock: " + e);
btn.SetImageResource(Resource.Drawable.ic_fingerprint_error);
btn.Tag = "Error initializing Fingerprint Unlock: " + e;
_biometryIdentifier = null;
}
return(false);
}
protected override void OnCreate(Bundle savedInstanceState)
{
_activityDesign.ApplyTheme();
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.fingerprint_setup);
Enum.TryParse(
PreferenceManager.GetDefaultSharedPreferences(this).GetString(App.Kp2a.CurrentDb.CurrentFingerprintModePrefKey, ""),
out _unlockMode);
_fpIcon = FindViewById <ImageView>(Resource.Id.fingerprint_icon);
_fpTextView = FindViewById <TextView>(Resource.Id.fingerprint_status);
SupportActionBar.SetDisplayHomeAsUpEnabled(true);
SupportActionBar.SetHomeButtonEnabled(true);
int[] radioButtonIds =
{
Resource.Id.radio_fingerprint_quickunlock, Resource.Id.radio_fingerprint_unlock,
Resource.Id.radio_fingerprint_disabled
};
_radioButtons = radioButtonIds.Select(FindViewById <RadioButton>).ToArray();
_radioButtons[0].Tag = FingerprintUnlockMode.QuickUnlock.ToString();
_radioButtons[1].Tag = FingerprintUnlockMode.FullUnlock.ToString();
_radioButtons[2].Tag = FingerprintUnlockMode.Disabled.ToString();
foreach (RadioButton r in _radioButtons)
{
r.CheckedChange += (sender, args) =>
{
var rbSender = ((RadioButton)sender);
if (!rbSender.Checked)
{
return;
}
foreach (RadioButton rOther in _radioButtons)
{
if (rOther == sender)
{
continue;
}
rOther.Checked = false;
}
FingerprintUnlockMode newMode;
Enum.TryParse(rbSender.Tag.ToString(), out newMode);
ChangeUnlockMode(_unlockMode, newMode);
};
}
CheckCurrentRadioButton();
int errorId = Resource.String.fingerprint_os_error;
SetError(errorId);
FindViewById(Resource.Id.cancel_button).Click += (sender, args) =>
{
_enc.StopListening();
_unlockMode = FingerprintUnlockMode.Disabled; //cancelling a FingerprintEncryption means a new key has been created but not been authenticated to encrypt something. We can't keep the previous state.
StoreUnlockMode();
FindViewById(Resource.Id.radio_buttons).Visibility = ViewStates.Visible;
FindViewById(Resource.Id.fingerprint_auth_container).Visibility = ViewStates.Gone;
_enc = null;
CheckCurrentRadioButton();
};
FindViewById(Resource.Id.radio_buttons).Visibility = ViewStates.Gone;
FindViewById(Resource.Id.fingerprint_auth_container).Visibility = ViewStates.Gone;
FindViewById <CheckBox>(Resource.Id.close_database_after_failed).Checked =
Util.GetCloseDatabaseAfterFailedBiometricQuickUnlock(this);
FindViewById <CheckBox>(Resource.Id.close_database_after_failed).CheckedChange += (sender, args) =>
{
PreferenceManager.GetDefaultSharedPreferences(this)
.Edit()
.PutBoolean(GetString(Resource.String.CloseDatabaseAfterFailedBiometricQuickUnlock_key), args.IsChecked)
.Commit();
};
UpdateCloseDatabaseAfterFailedBiometricQuickUnlockVisibility();
}
