protected override void OnSizeChanged(int width, int height, int oldw, int oldh)
{
base.OnSizeChanged(width, height, oldw, oldh);
Random random = new Random();
IInterpolator interpolator = new LinearInterpolator();
coords = new int[snow_flake_count][];
drawables.Clear();
for (int i = 0; i < snow_flake_count; i++)
{
//Console.WriteLine ("Add animation for number " + i);
Animation animation = new TranslateAnimation(0, height / 10 - random.Next(height / 5), 0, height + 50);
animation.Duration = (10 * height + random.Next(10 * height)) + 3000;
animation.RepeatCount = -1;
animation.Initialize(10, 10, 10, 10);
animation.Interpolator = interpolator;
coords[i] = new int[] { random.Next(width - 30), -40 };
//Console.WriteLine ("Coords = " + coords[i][0] + " and " + coords[i][1]);
var snow = GetSnowFlake();
snow.SetAlpha(random.Next(180, 255));
drawables.Add(new AnimateDrawable(snow, animation));
animation.StartOffset = random.Next(20 * height);
animation.StartNow();
}
}
async void AutoScan()
{
scanner.UseCustomOverlay = true;
zxingOverlay = LayoutInflater.FromContext(this).Inflate(Resource.Layout.ZxingOverlay, null);
ImageView ivScanning = zxingOverlay.FindViewById <ImageView>(Resource.Id.ivScanning);
Button btnCancelScan = zxingOverlay.FindViewById <Button>(Resource.Id.btnCancelScan);
btnCancelScan.Click += (s, e) =>
{
if (scanner != null)
{
scanner.Cancel();
}
};
zxingOverlay.Measure(MeasureSpecMode.Unspecified.GetHashCode(), MeasureSpecMode.Unspecified.GetHashCode());
int width = zxingOverlay.MeasuredWidth;
int height = zxingOverlay.MeasuredHeight;
// 从上到下的平移动画
Animation verticalAnimation = new TranslateAnimation(0, 0, 0, height);
verticalAnimation.Duration = 3000; // 动画持续时间
verticalAnimation.RepeatCount = Animation.Infinite; // 无限循环
// 播放动画
ivScanning.Animation = verticalAnimation;
verticalAnimation.StartNow();
scanner.CustomOverlay = zxingOverlay;
var mbs = MobileBarcodeScanningOptions.Default;
mbs.AssumeGS1 = true;
mbs.AutoRotate = true;
mbs.DisableAutofocus = false;
mbs.PureBarcode = false;
mbs.TryInverted = true;
mbs.TryHarder = true;
mbs.UseCode39ExtendedMode = true;
mbs.UseFrontCameraIfAvailable = false;
mbs.UseNativeScanning = true;
var result = await scanner.Scan(this, mbs);
HandleScanResult(result);
}