路径、渐变与混合模式
创建复杂的填充和描边。
路径、渐变与混合模式 是 CoddyKit 上的免费 Jetpack Compose Academy 课时。 这是第 2 节课，共 4 节。 你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。 这是 Jetpack Compose Academy 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Jetpack Compose Academy 课程共包含 4 节课。
本课时的部分内容尚未翻译，以英文显示。
Beyond Simple Shapes
Lines and circles are great, but real graphics need curves and rich fills. Meet Path, gradients, and blend modes for that next level.
What Is a Path
A Path is a recorded outline you build point by point. You move and line your way around, then draw the finished shape in one call.
val path = Path()
path.moveTo(0f, 0f)
path.lineTo(100f, 0f)moveTo and lineTo
Use moveTo to lift the pen to a start point, then lineTo to draw straight segments. Chain them to trace any polygon you like.
path.moveTo(0f, 0f)
path.lineTo(80f, 120f)
path.lineTo(160f, 0f)
path.close()Curves with quadraticBezierTo
For smooth bends use quadraticBezierTo. A control point pulls the line into a curve, perfect for soft chart edges.
path.quadraticBezierTo(50f, -40f, 100f, 0f)Draw the Path
Once built, hand the path to drawPath with a color or brush. You can fill it solid or outline it with a Stroke style.
drawPath(path = path, color = Color.Blue)Meet the Brush
A Brush describes how an area is painted. Instead of a flat color, a brush can pour a smooth gradient across your shape.
Linear Gradients
Use Brush.linearGradient to blend colors along a straight line. Pass a list of colors and watch them fade from one to the next.
val brush = Brush.linearGradient(
listOf(Color.Cyan, Color.Magenta)
)
drawRect(brush = brush)Radial Gradients
Reach for Brush.radialGradient to blend outward from a center. It is ideal for spotlights, soft buttons, and glowing orbs.
val glow = Brush.radialGradient(
listOf(Color.White, Color.Blue)
)Sweep Gradients
A Brush.sweepGradient rotates colors around a center point. It is the secret behind colorful progress rings and rainbow dials.
val sweep = Brush.sweepGradient(
listOf(Color.Red, Color.Yellow, Color.Red)
)Meet Blend Modes
A BlendMode decides how a new shape mixes with what is already drawn. Multiply darkens, Screen lightens, and Plus adds light.
drawCircle(
color = Color.Yellow,
blendMode = BlendMode.Multiply
)Layer for Effects
Blend modes shine when shapes overlap. Stack two translucent circles with BlendMode.Plus and their intersection glows brighter.
Quick Check
Which brush rotates colors around a center point?
Recap
You can now build curves with Path, fill shapes with linear, radial, and sweep gradients, and combine them using blend modes. Time to get creative! ✨
常见问题解答
「路径、渐变与混合模式」课时是免费的吗？
是的 — 「路径、渐变与混合模式」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 Jetpack Compose Academy 课程的其余内容，请升级到 CoddyKit PRO。 Jetpack Compose Academy 课程共包含 4 节课。
「路径、渐变与混合模式」这节课中我会学到什么？
创建复杂的填充和描边。 你通过在浏览器中直接运行的动手代码来练习 Jetpack Compose Academy，全天候 AI 导师会在你学习这节课的过程中回答你的问题。
学习 Jetpack Compose Academy 需要有经验吗？
无需任何先前经验。CoddyKit 上的 Jetpack Compose Academy 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。 这是第 2 节课，共 4 节。
「路径、渐变与混合模式」课时需要多长时间？
大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。
我能在这节 Jetpack Compose Academy 课中编写并运行代码吗？
能。每节 Jetpack Compose Academy 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。