Добавленный код для вычисления корректных круговых измерений
import android.content.Context
import android.graphics.Canvas
import android.graphics.Color
import android.graphics.Paint
import android.graphics.RectF
import android.util.AttributeSet
import android.view.View
import androidx.core.content.ContextCompat
class Circle(context: Context, attrs: AttributeSet) : View(context, attrs) {
private val paint: Paint
private val rect: RectF
var angle = 0f
companion object {
private val START_ANGLE_POINT = 270f
}
init {
val strokeWidth = resources.getDimension(R.dimen.toast_circle_stroke_width)
paint = Paint().apply {
setAntiAlias(true)
setStyle(Paint.Style.STROKE)
setStrokeWidth(strokeWidth)
setColor(Color.RED)
}
val circleSize = resources.getDimension(R.dimen.toast_circle_size)
rect = RectF(
strokeWidth,
strokeWidth,
circleSize + strokeWidth,
circleSize + strokeWidth
)
}
override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
val circleSize = resources.getDimension(R.dimen.toast_circle_size).toInt()
val strokeWidth = resources.getDimension(R.dimen.toast_circle_stroke_width).toInt()
super.onMeasure(
MeasureSpec.makeMeasureSpec(circleSize + 2 * strokeWidth, MeasureSpec.EXACTLY),
MeasureSpec.makeMeasureSpec(circleSize + 2 * strokeWidth, MeasureSpec.EXACTLY));
}
override fun onDraw(canvas: Canvas) {
super.onDraw(canvas)
canvas.drawArc(rect, START_ANGLE_POINT, angle, false, paint)
}
}