public override void OnRequestPermissionsResult(int requestCode, string[] permissions, Permission[] grantResults)
{
if (requestCode == FINGERPRINT_PERMISSION_REQUEST_CODE && grantResults[0] == Android.Content.PM.Permission.Granted)
{
Button encButton = FindViewById <Button>(Resource.Id.MyButton);
Button decButton = FindViewById <Button>(Resource.Id.Decrypt);
encButton.Visibility = ViewStates.Visible;
encButton.Enabled = true;
var fingerprint = new keepass2android.FingerprintModule(this);
encButton.Click += (sender, args) =>
{
var fingerprintEnc = new FingerprintEncryption(fingerprint, _keyId);
if (fingerprintEnc.InitCipher())
{
fingerprintEnc.StartListening(new EncryptionCallback(this, fingerprintEnc, prefKey));
}
else
{
Toast.MakeText(this, "Error initiating cipher", ToastLength.Long).Show();
}
};
decButton.Click += (sender, args) =>
{
var fingerprintDec = new FingerprintDecryption(fingerprint, _keyId, this, prefKey);
if (fingerprintDec.InitCipher())
{
fingerprintDec.StartListening(new DecryptionCallback(this, fingerprintDec, prefKey));
}
else
{
Toast.MakeText(this, "Error initiating cipher", ToastLength.Long).Show();
}
};
if (!fingerprint.KeyguardManager.IsKeyguardSecure)
{
encButton.Enabled = false;
// Show a message that the user hasn't set up a fingerprint or lock screen.
Toast.MakeText(this, "Secure lock screen hasn't set up.\n"
+ "Go to 'Settings -> Security -> Fingerprint' to set up a fingerprint", ToastLength.Long).Show();
return;
}
if (!fingerprint.FingerprintManager.HasEnrolledFingerprints)
{
encButton.Enabled = false;
// This happens when no fingerprints are registered.
Toast.MakeText(this, "Go to 'Settings -> Security -> Fingerprint' " +
"and register at least one fingerprint", ToastLength.Long).Show();
return;
}
}
}
public DecryptionCallback(Context context, FingerprintDecryption fingerprintDec, string prefKey)
{
_context = context;
_fingerprintDec = fingerprintDec;
_prefKey = prefKey;
}
