protected override void OnElementChanged(ElementChangedEventArgs <ShimmerView> e)
{
if (shimmer == null)
{
shimmer = new ShimmerFrameLayout(Context);
}
var text = new TextView(Context)
{
Text = "Xamarin Library"
};
text.SetTextColor(Android.Graphics.Color.White);
text.SetTextSize(Android.Util.ComplexUnitType.Px, 100);
var builder = new Shimmer.AlphaHighlightBuilder();
builder.SetDuration(2500);
builder.SetBaseAlpha(0.1f);
builder.SetDropoff(0.1f);
builder.SetTilt(0f);
shimmer.SetShimmer(builder.Build());
shimmer.AddView(text);
shimmer.StartShimmer();
SetNativeControl(shimmer);
}
private void SelectPreset(int preset, bool showToast)
{
if (currentPreset == preset)
{
return;
}
if (currentPreset >= 0)
{
presetButtons[currentPreset].SetBackgroundResource(Resource.Color.preset_button_background);
}
currentPreset = preset;
presetButtons[currentPreset].SetBackgroundResource(Resource.Color.preset_button_background_selected);
// If a toast is already showing, hide it
toast?.Cancel();
var shimmerBuilder = new Shimmer.AlphaHighlightBuilder();
switch (preset)
{
case 1:
// Slow and reverse
toast = Toast.MakeText(this, "Slow and reverse", ToastLength.Short);
shimmerBuilder.SetDuration(5000L);
shimmerBuilder.SetRepeatMode((int)ValueAnimatorRepeatMode.Reverse);
break;
case 2:
// Thin, straight and transparent
shimmerBuilder.SetBaseAlpha(0.1f);
shimmerBuilder.SetDropoff(0.1f);
shimmerBuilder.SetTilt(0f);
toast = Toast.MakeText(this, "Thin, straight and transparent", ToastLength.Short);
break;
case 3:
// Sweep angle 90
shimmerBuilder.SetDirection(Shimmer.Direction.TopToBottom);
shimmerBuilder.SetTilt(0f);
toast = Toast.MakeText(this, "Sweep angle 90", ToastLength.Short);
break;
case 4:
// Spotlight
shimmerBuilder.SetBaseAlpha(0f);
shimmerBuilder.SetDuration(2000L);
shimmerBuilder.SetDropoff(0.1f);
shimmerBuilder.SetIntensity(0.35f);
shimmerBuilder.SetShape(Shimmer.Shape.Radial);
toast = Toast.MakeText(this, "Spotlight", ToastLength.Short);
break;
case 5:
// Off
toast = Toast.MakeText(this, "Off", ToastLength.Short);
shimmerBuilder = null;
break;
default:
toast = Toast.MakeText(this, "Default", ToastLength.Short);
shimmerBuilder = default(Shimmer.AlphaHighlightBuilder);
break;
}
shimmerViewContainer.SetShimmer(shimmerBuilder?.Build());
// Show toast describing the chosen preset, if necessary
toast?.Show();
}