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FingerprintDialogFragment.cs
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FingerprintDialogFragment.cs
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using System;
using System.Threading;
using System.Threading.Tasks;
using Android.Animation;
using Android.App;
using Android.Content;
using Android.Graphics;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Views.Animations;
using Android.Widget;
using Plugin.Fingerprint.Abstractions;
using Plugin.Fingerprint.Contract;
using Plugin.Fingerprint.Utils;
namespace Plugin.Fingerprint.Dialog
{
public class FingerprintDialogFragment : DialogFragment, IAuthenticationFailedListener, IDialogInterfaceOnKeyListener
{
private TaskCompletionSource<FingerprintAuthenticationResult> _resultTaskCompletionSource;
private TextView _helpText;
private Button _cancelButton;
private Button _fallbackButton;
private ImageView _icon;
private bool _canceledByLifecycle;
private CancellationTokenSource _cancelationTokenSource;
private IAndroidFingerprintImplementation _implementation;
protected Color NegativeColor = new Color(217, 59, 59);
protected Color PositiveColor = new Color(90, 185, 83);
protected AuthenticationRequestConfiguration Configuration { get; private set; }
public FingerprintDialogFragment()
{
}
public FingerprintDialogFragment(IntPtr ptr, JniHandleOwnership owner) : base(ptr, owner)
{
}
public override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
RetainInstance = true;
SetStyle(DialogFragmentStyle.NoTitle, 0);
}
public override void OnResume()
{
base.OnResume();
var param = Dialog.Window.Attributes;
param.Width = ViewGroup.LayoutParams.MatchParent;
param.Height = ViewGroup.LayoutParams.WrapContent;
Dialog.Window.Attributes = param;
if (_cancelButton != null)
{
_cancelButton.Text = string.IsNullOrWhiteSpace(Configuration.CancelTitle) ? Application.Context.GetString(Android.Resource.String.Cancel) : Configuration.CancelTitle;
_cancelButton.Click += OnCancel;
}
if (_fallbackButton != null)
{
_fallbackButton.Text = string.IsNullOrWhiteSpace(Configuration.FallbackTitle) ? "Use Fallback" : Configuration.FallbackTitle;
_fallbackButton.Click += OnFallback;
}
StartAuthenticationAsync();
}
public override void OnPause()
{
DetachEventHandlers();
_canceledByLifecycle = true;
_cancelationTokenSource?.Cancel();
base.OnPause();
}
public override Android.App.Dialog OnCreateDialog(Bundle savedInstanceState)
{
var dialog = base.OnCreateDialog(savedInstanceState);
dialog.SetCanceledOnTouchOutside(false);
dialog.SetOnKeyListener(this);
return dialog;
}
public async Task<FingerprintAuthenticationResult> ShowAsync(AuthenticationRequestConfiguration config, IAndroidFingerprintImplementation implementation, CancellationToken cancellationToken)
{
Configuration = config;
_implementation = implementation;
var currentActivity = CrossFingerprint.CurrentActivity;
Show(currentActivity.FragmentManager, "fingerprint-fragment");
using (cancellationToken.Register(OnExternalCancel))
{
return await _resultTaskCompletionSource.Task;
}
}
public override void Show(FragmentManager manager, string tag)
{
_resultTaskCompletionSource = new TaskCompletionSource<FingerprintAuthenticationResult>();
base.Show(manager, tag);
}
protected void DetachEventHandlers()
{
if (_cancelButton != null)
{
_cancelButton.Click -= OnCancel;
}
if (_fallbackButton != null)
{
_fallbackButton.Click -= OnFallback;
}
}
private void SetManualResult(FingerprintAuthenticationResultStatus status, bool animation = true)
{
_canceledByLifecycle = true;
_cancelationTokenSource?.Cancel();
Dismiss(new FingerprintAuthenticationResult
{
Status = status
}, animation);
}
private async void Dismiss(FingerprintAuthenticationResult result, bool animation = true)
{
DetachEventHandlers();
if (animation)
{
HideHelpText();
await AnimateResultAsync(result.Status);
}
_resultTaskCompletionSource.TrySetResult(result);
DismissAllowingStateLoss();
}
private void OnExternalCancel()
{
SetManualResult(FingerprintAuthenticationResultStatus.Canceled, false);
}
public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
var view = inflater.Inflate(Resource.Layout.FingerprintDialog, container);
view.FindViewById<TextView>(Resource.Id.fingerprint_txtReason).Text = Configuration.Reason;
_helpText = view.FindViewById<TextView>(Resource.Id.fingerprint_txtHelp);
_cancelButton = view.FindViewById<Button>(Resource.Id.fingerprint_btnCancel);
_fallbackButton = view.FindViewById<Button>(Resource.Id.fingerprint_btnFallback);
_icon = view.FindViewById<ImageView>(Resource.Id.fingerprint_imgFingerprint);
return view;
}
private async void StartAuthenticationAsync()
{
_cancelationTokenSource = new CancellationTokenSource();
_canceledByLifecycle = false;
var result = await _implementation.AuthenticateNoDialogAsync(this, _cancelationTokenSource.Token);
if (!_canceledByLifecycle)
{
_cancelationTokenSource = null;
Dismiss(result);
}
}
private void OnCancel(object sender, EventArgs e)
{
SetManualResult(FingerprintAuthenticationResultStatus.Canceled);
}
private void OnFallback(object sender, EventArgs e)
{
SetManualResult(FingerprintAuthenticationResultStatus.FallbackRequested);
}
public bool OnKey(IDialogInterface dialog, Keycode keyCode, KeyEvent e)
{
if (keyCode == Keycode.Back && e.Action == KeyEventActions.Up)
{
SetManualResult(FingerprintAuthenticationResultStatus.Canceled);
return true;
}
return false;
}
public virtual async void OnFailedTry()
{
HideHelpText();
await AnimateFailedTryAsync();
}
public void OnHelp(FingerprintAuthenticationHelp help, string nativeHelpText)
{
if(_helpText == null)
return;
var text = Configuration.HelpTexts.GetText(help, nativeHelpText);
if (!string.IsNullOrEmpty(text))
{
_helpText.Text = text;
_helpText.Visibility = ViewStates.Visible;
}
}
private void HideHelpText()
{
if (_helpText != null)
{
_helpText.Visibility = ViewStates.Gone;
}
}
private async Task AnimateResultAsync(FingerprintAuthenticationResultStatus status)
{
switch (status)
{
case FingerprintAuthenticationResultStatus.Succeeded:
await FinalAnimationAsync(PositiveColor);
break;
case FingerprintAuthenticationResultStatus.FallbackRequested:
await FallbackAnimationAsync();
break;
case FingerprintAuthenticationResultStatus.Unknown:
case FingerprintAuthenticationResultStatus.Failed:
case FingerprintAuthenticationResultStatus.Canceled:
case FingerprintAuthenticationResultStatus.TooManyAttempts:
case FingerprintAuthenticationResultStatus.UnknownError:
case FingerprintAuthenticationResultStatus.NotAvailable:
await FinalAnimationAsync(NegativeColor);
break;
default:
throw new ArgumentOutOfRangeException(nameof(status), status, null);
}
}
private async Task FinalAnimationAsync(Color color)
{
if (_icon == null)
return;
_icon.SetColorFilter(color);
var press = ObjectAnimator.OfPropertyValuesHolder(_icon, PropertyValuesHolder.OfFloat("scaleX", 0.7f), PropertyValuesHolder.OfFloat("scaleY", 0.7f));
press.SetDuration(300);
press.RepeatMode = ValueAnimatorRepeatMode.Reverse;
press.RepeatCount = 1;
await press.StartAsync();
}
private async Task AnimateFailedTryAsync()
{
if (_icon == null)
return;
_icon.SetColorFilter(NegativeColor);
var shake = ObjectAnimator.OfFloat(_icon, "translationX", -10f, 10f);
shake.SetDuration(500);
shake.SetInterpolator(new CycleInterpolator(5));
await shake.StartAsync();
_icon.ClearColorFilter();
}
private async Task FallbackAnimationAsync()
{
if (_icon == null)
return;
var rotate = ObjectAnimator.OfFloat(_icon, "rotationY", 0f, 180f);
var fade = ObjectAnimator.OfFloat(_icon, "alpha", 1f, 0f);
var scale = ObjectAnimator.OfPropertyValuesHolder(_icon, PropertyValuesHolder.OfFloat("scaleX", 0.4f), PropertyValuesHolder.OfFloat("scaleY", 0.4f));
rotate.SetDuration(200);
fade.SetDuration(600);
scale.SetDuration(600);
var animation = new AnimatorSet();
animation.Play(rotate).Before(scale);
animation.Play(fade).With(scale);
await animation.StartAsync();
}
}
}