import android
.animation
.Animator
import android
.animation
.ObjectAnimator
import android
.animation
.ValueAnimator
import android
.graphics.Canvas
import android
.graphics.Color
import android
.graphics.ColorFilter
import android
.graphics.LinearGradient
import android
.graphics.Paint
import android
.graphics.Path
import android
.graphics.PixelFormat
import android
.graphics.RectF
import android
.graphics.Region
import android
.graphics.Shader
import android
.graphics.drawable
.Drawable
import android
.util
.Log
import android
.view
.View
import android
.view
.ViewGroup
import android
.view
.animation
.AccelerateDecelerateInterpolator
/**
@Author
: admin
@CreateDate
: 2025/9/10 13
:33
@Description
:
*/
class AnimationManager
(
private val targetView
: View,
private val config
: SkeletonConfig
) {
private var animator
: Animator? = null
private val appliedDrawables = mutableListOf<Pair<View, Drawable>>
() // 记录
(view, drawable
) 对
private val paint = Paint
().apply {
isAntiAlias = true
}
fun start
() {
stop
() // 先清理旧状态
animator = createShimmerAnimator
()
animator?
.start
()
}
fun stop
() {
// 1
. 停止动画
animator?
.cancel
()
animator = null
// 2
. 移除所有已添加的 Drawable appliedDrawables
.forEach {
(view, drawable
) -> try { view
.overlay
.remove
(drawable
) } catch
(e
: Exception
) { com
.tplink
.omada
.libutility
.log
.Log
.e
("AnimationManager", "Failed to remove overlay from view"
) } } appliedDrawables
.clear()
}
private fun createShimmerAnimator
(): ValueAnimator {
return ValueAnimator
.ofFloat
(-1f, 2f
).apply {
duration = config
.shimmerDuration
repeatCount = ValueAnimator
.INFINITE
interpolator = AccelerateDecelerateInterpolator
()
addUpdateListener { anim ->
val value = anim
.animatedValue as Float
val shader = LinearGradient
(
targetView
.width * value, 0f,
targetView
.width *
(value + 1
), 0f,
intArrayOf
(Color.TRANSPARENT,
Color.parse
Color(“#EEEEEE”
),
Color.TRANSPARENT),
floatArrayOf
(0f, 0
.5f, 1f
),
Shader
.TileMode
.CLAMP
)
paint
.shader = shader
// 触发所有 shimmer drawable 重绘 appliedDrawables
.forEach {
(_, drawable
) -> drawable
.invalidateSelf
() } } }
.also { animator -> // 创建 shimmer drawables 并添加到 overlays fun recursivelyApplyShimmer
(view
: View
) { com
.tplink
.omada
.libutility
.log
.Log
.d
( "AnimationManager", "Applying shimmer to
: ${view
.javaClass
.simpleName}, ID
: ${view
.id}"
) if
(view is ViewGroup
) { for
(i in 0 until view
.childCount
) { recursivelyApplyShimmer
(view
.getChildAt
(i
)) } } else { // 确保 view 尺寸有效 if
(view
.width <= 0 || view
.height <= 0
) return val cornerRadius = config
.cornerRadius
.coerceAtLeast
(0f
) val shimmerDrawable = object
: Drawable
() { private var clipPath
: Path? = null override fun draw
(canvas
: Canvas
) { val bounds = this
.bounds if
(bounds
.isEmpty || paint
.shader == null
) return if
(cornerRadius > 0f
) { // 创建圆角矩形路径 val path = Path
().apply { addRoundRect
( RectF
(bounds
), cornerRadius, cornerRadius, Path
.Direction
.CW
) } // 裁剪画布：只允许在路径内绘制 canvas
.clipPath
(path, Region
.Op
.INTERSECT
) } // 绘制渐变光带 canvas
.drawRect
(bounds, paint
) } override fun setAlpha
(alpha
: Int
) {} override fun set
ColorFilter
(colorFilter
: ColorFilter?
) {} @Deprecated
("Deprecated in Java"
) override fun getOpacity
(): Int = PixelFormat
.TRANSLUCENT }
.apply { setBounds
(0, 0, view
.width, view
.height
) view
.overlay
.add
(this
) } appliedDrawables
.add
(view to shimmerDrawable
) } } // 开始递归添加 shimmer 效果 recursivelyApplyShimmer
(targetView
) }
}
private fun createPulseAnimator
(): ObjectAnimator {
return ObjectAnimator
.ofFloat
(targetView, View
.ALPHA, 1f, 0
.5f, 1f
).apply {
duration = config
.shimmerDuration
repeatCount = ValueAnimator
.INFINITE
interpolator = AccelerateDecelerateInterpolator
()
}
}
}解释这个代码，写成简单点的，不用glamada，并告诉我为什么view是一个圆角矩形，但是它上面的动画移动到左边或者右边的时候造成圆角消失的现象
探讨了Graphics::Clear(Color::Transparent)在C#中不按预期工作的问题。此函数并未清除背景为透明，而是将现有图像与透明色叠加，导致原有图像保持不变。文章提供了多个参考资料以进一步解释这一现象。
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