我正在嘗試在 android 中制作一個自定義視圖,就像圖片中的曲線邊緣和圓角一樣。如何在下面的圖片鏈接中實作這一點?
https://i.stack.imgur.com/lPSJN.png
uj5u.com熱心網友回復:
不久前,我嘗試為這個(松鼠)形狀創建一個自定義視圖。雖然它不完整,但它會給你一個關于如何繪制這些形狀的基本概念。順便說一句,您需要禁用其父視圖的 clipChildren 以修復剪輯。
package com.certainlyaria.squircle
import android.content.Context
import android.graphics.*
import android.util.AttributeSet
import android.view.View
class SquircleView @JvmOverloads constructor(
context: Context,
attrs: AttributeSet? = null,
defStyleAttr: Int = 0
) : View(context, attrs, defStyleAttr) {
private val paint = Paint().apply {
color = Color.MAGENTA
isAntiAlias = true
style = Paint.Style.STROKE
strokeJoin = Paint.Join.ROUND
strokeWidth = 10f
}
companion object {
private const val CURVE = 75f
}
private val clipPath = Path()
private var smooth = Path()
private val clipRect = RectF(
CURVE, CURVE, 0f, 0f
)
override fun onSizeChanged(w: Int, h: Int, oldw: Int, oldh: Int) {
super.onSizeChanged(w, h, oldw, oldh)
clipRect.apply {
right = w - CURVE
bottom = h - CURVE
}
clipPath.apply {
rewind()
moveTo(0f, (width) / 2f)
cubicTo(
0f,
0f,
(width) / 4f,
0f,
(width) / 2f,
0f
)
cubicTo(
(width) * 3 / 4f,
0f,
width.toFloat(),
0f,
width.toFloat(),
width / 2f
)
cubicTo(
width.toFloat(),
width.toFloat(),
width * 3f / 4,
width.toFloat(),
(width) / 2f,
width.toFloat()
)
cubicTo(
width / 4f,
width.toFloat(),
0f,
width.toFloat(),
0f,
(width) / 2f
)
}
smooth = getSquirclePaath(0, 0, width / 2)
}
override fun onDraw(canvas: Canvas) {
canvas.save()
canvas.drawPath(clipPath, paint)
//canvas.drawPath(smooth, paint)
canvas.restore()
}
private fun getSquirclePaath(
left: Int,
top: Int,
radius: Int
): Path { //Formula: (|x|)^3 (|y|)^3 = radius^3
val radiusToPow = radius * radius * radius.toDouble()
val path = Path()
path.moveTo((-radius).toFloat(), 0f)
for (x in -radius..radius) path.lineTo(
x.toFloat(),
Math.cbrt(radiusToPow - Math.abs(x * x * x)).toFloat()
)
for (x in radius downTo -radius) path.lineTo(
x.toFloat(),
(-Math.cbrt(radiusToPow - Math.abs(x * x * x))).toFloat()
)
path.close()
val matrix = Matrix()
matrix.postTranslate((left radius).toFloat(), (top radius).toFloat())
path.transform(matrix)
return path
}
}
uj5u.com熱心網友回復:
- 如果要創建視圖,最簡單的方法是將布局包裝在卡片視圖中,然后添加卡片角半徑。
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
... >
<!-- A CardView that contains a TextView -->
<androidx.cardview.widget.CardView
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="@ id/card_view"
android:layout_gravity="center"
android:layout_width="200dp"
android:layout_height="200dp"
card_view:cardCornerRadius="4dp">
<TextView
android:id="@ id/info_text"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</androidx.cardview.widget.CardView>
</LinearLayout>
參考:谷歌檔案
- 如果您想創建一個像您提到的照片一樣的圖示.. 只需在任何插畫軟體中創建該影像,然后從 drawable>[右鍵單擊]> 影像資產覆寫您的 android 圖示
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