Question

我正在尝试在Xamarin.Android项目中为我的启动画面上的ImageView设置动画。图像相应地淡入/翻译，位于屏幕中间一秒钟，然后尝试翻译出来。问题在于，当从屏幕顶部翻译时动画卡住了一半时间。

布局：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">
  <ImageView
      android:id="@+id/logoImageView"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:layout_centerHorizontal="true"
      android:layout_marginBottom="40dp"
      android:layout_marginTop="70dp"
      android:background="@null"
      android:src="@drawable/logo_light"
      android:scaleType="centerInside"
      android:visibility="invisible" />

</RelativeLayout>

在SplashActivity中：

public override void OnWindowFocusChanged(bool hasFocus)
{
    if (hasFocus)
        StartAnimations();
}

    private void StartAnimations()
    {
        imageView = FindViewById<ImageView>(MySolution.Droid.Resource.Id.logoImageView);
        imageView.Visibility = 0;

        // Fade In
        var fadeIn = new AlphaAnimation(0, 1);
        fadeIn.Duration = 500;
        fadeIn.Interpolator = new AccelerateInterpolator();

        var transLateIn = new TranslateAnimation(0, 0, -200, 0);
        transLateIn.Duration = 750;
        transLateIn.Interpolator = new LinearInterpolator();

        var delay = new AlphaAnimation(1, 1);
        delay.StartOffset = 750;
        delay.Duration = 1000;

        var transLateOut = new TranslateAnimation(0, 0, 0, -5000);
        transLateOut.StartOffset = 1750;
        transLateOut.Duration = 750;
        transLateOut.Interpolator = new LinearInterpolator();
        transLateOut.FillAfter = false;

        var fadeInSet = new AnimationSet(false);
        fadeInSet.AddAnimation(fadeIn);
        fadeInSet.AddAnimation(transLateIn);
        fadeInSet.AddAnimation(delay);
        fadeInSet.AddAnimation(transLateOut);

        imageView.StartAnimation(fadeInSet);
    }

有人能说清楚为什么会这样吗？

Xamarin Android翻译动画变得困难

0 个答案: