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);
_fingerprintIdentifier = null;
}
protected override void OnPause()
{
if (_fingerprintIdentifier != null)
{
Kp2aLog.Log("FP: Stop listening");
_fingerprintIdentifier.StopListening();
_fingerprintIdentifier = null;
}
base.OnPause();
}
public override void OnRequestPermissionsResult(int requestCode, string[] permissions, Permission[] grantResults)
{
Kp2aLog.Log("OnRequestPermissionsResult " + (requestCode == FingerprintPermissionRequestCode) +
((grantResults.Length > 0) && (grantResults[0] == Permission.Granted)));
if ((requestCode == FingerprintPermissionRequestCode) && (grantResults.Length > 0) && (grantResults[0] == Permission.Granted))
{
var btn = FindViewById <ImageButton>(Resource.Id.fingerprintbtn);
btn.Click += (sender, args) =>
{
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 (_fingerprintIdentifier != null)
{
b.SetNegativeButton(Resource.String.disable_sensor, (senderAlert, alertArgs) =>
{
btn.SetImageResource(Resource.Drawable.ic_fingerprint_error);
_fingerprintIdentifier?.StopListening();
_fingerprintIdentifier = null;
});
}
else
{
b.SetNegativeButton(Resource.String.enable_sensor, (senderAlert, alertArgs) =>
{
InitFingerprintUnlock();
});
}
b.Show();
};
_fingerprintPermissionGranted = true;
Kp2aLog.Log("_fingerprintPermissionGranted");
if (_onResumeDone)
{
//it seems the permission result is called after onResume sometimes. Repeat fingerprint unlock then.
InitFingerprintUnlock();
}
}
}
private bool InitFingerprintUnlock()
{
Kp2aLog.Log("InitFingerprintUnlock");
if (_fingerprintIdentifier != 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)
{
_fingerprintIdentifier = null;
return(false);
}
if (_fingerprintPermissionGranted)
{
FingerprintModule fpModule = new FingerprintModule(this);
Kp2aLog.Log("fpModule.FingerprintManager.IsHardwareDetected=" + fpModule.FingerprintManager.IsHardwareDetected);
if (fpModule.FingerprintManager.IsHardwareDetected) //see FingerprintSetupActivity
{
_fingerprintIdentifier = new FingerprintDecryption(fpModule, App.Kp2a.GetDbForQuickUnlock().CurrentFingerprintPrefKey, this,
App.Kp2a.GetDbForQuickUnlock().CurrentFingerprintPrefKey);
}
}
if ((_fingerprintIdentifier == null) && (!FingerprintDecryption.IsSetUp(this, App.Kp2a.GetDbForQuickUnlock().CurrentFingerprintPrefKey)))
{
try
{
Kp2aLog.Log("trying Samsung Fingerprint API...");
_fingerprintIdentifier = new FingerprintSamsungIdentifier(this);
btn.Click += (sender, args) =>
{
if (_fingerprintIdentifier.Init())
{
_fingerprintIdentifier.StartListening(this, this);
}
};
Kp2aLog.Log("trying Samsung Fingerprint API...Seems to work!");
}
catch (Exception)
{
Kp2aLog.Log("trying Samsung Fingerprint API...failed.");
_fingerprintIdentifier = null;
}
}
if (_fingerprintIdentifier == null)
{
FindViewById <ImageButton>(Resource.Id.fingerprintbtn).Visibility = ViewStates.Gone;
return(false);
}
btn.Tag = GetString(Resource.String.fingerprint_unlock_hint);
if (_fingerprintIdentifier.Init())
{
Kp2aLog.Log("successfully initialized fingerprint.");
btn.SetImageResource(Resource.Drawable.ic_fp_40px);
_fingerprintIdentifier.StartListening(this, 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;
_fingerprintIdentifier = null;
}
return(false);
}
