protected override void OnResume()
{
base.OnResume();
_design.ReapplyTheme();
CheckIfUnloaded();
bool showKeyboard = ((!InitFingerprintUnlock()) || (Util.GetShowKeyboardDuringFingerprintUnlock(this)));
EditText pwd = (EditText)FindViewById(Resource.Id.QuickUnlock_password);
pwd.PostDelayed(() =>
{
InputMethodManager keyboard = (InputMethodManager)GetSystemService(Context.InputMethodService);
if (showKeyboard)
{
keyboard.ShowSoftInput(pwd, 0);
}
else
{
keyboard.HideSoftInputFromWindow(pwd.WindowToken, HideSoftInputFlags.ImplicitOnly);
}
}, 50);
var btn = FindViewById <ImageButton>(Resource.Id.fingerprintbtn);
btn.Click += (sender, args) =>
{
if (_biometryIdentifier.HasUserInterface || string.IsNullOrEmpty((string)btn.Tag))
{
_biometryIdentifier.StartListening(this);
}
else
{
AlertDialog.Builder b = new AlertDialog.Builder(this);
b.SetTitle(Resource.String.fingerprint_prefs);
b.SetMessage(btn.Tag.ToString());
b.SetPositiveButton(Android.Resource.String.Ok, (o, eventArgs) => ((Dialog)o).Dismiss());
if (_biometryIdentifier != null)
{
b.SetNegativeButton(Resource.String.disable_sensor, (senderAlert, alertArgs) =>
{
btn.SetImageResource(Resource.Drawable.ic_fingerprint_error);
_biometryIdentifier?.StopListening();
_biometryIdentifier = null;
});
}
else
{
b.SetNegativeButton(Resource.String.enable_sensor, (senderAlert, alertArgs) =>
{
InitFingerprintUnlock();
});
}
b.Show();
}
};
}
private void HandleFingerprintKeyInvalidated()
{
var btn = FindViewById <ImageButton>(Resource.Id.fingerprintbtn);
//key invalidated permanently
btn.SetImageResource(Resource.Drawable.ic_fingerprint_error);
btn.Tag = GetString(Resource.String.fingerprint_unlock_failed) + " " + GetString(Resource.String.fingerprint_reenable2);
_biometryIdentifier = null;
}
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);
}
