Android 自定义竖直的虚线

/**
 * 竖直虚线
 */
class VerticalDashedLineView @JvmOverloads constructor(
    context: Context,
    attrs: AttributeSet? = null
) : View(context, attrs) {

    private val paint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
        color = Color.parseColor("#AAAAAA")
        strokeWidth = 1f * resources.displayMetrics.density
        style = Paint.Style.STROKE
        pathEffect = android.graphics.DashPathEffect(
            floatArrayOf(
                4f * resources.displayMetrics.density,
                3f * resources.displayMetrics.density
            ),
            0f
        )
    }

    override fun onDraw(canvas: Canvas) {
        super.onDraw(canvas)

        val x = width / 2f
        canvas.drawLine(x, 0f, x, height.toFloat(), paint)
    }
}

使用：

<com.xx.xx.widget.VerticalDashedLineView
            android:layout_width="1dp"
            android:layout_height="200dp"
            />

strokeWidth 虚线粗细 1dp

dashWidth 每段实线长度 4dp

dashGap 每段之间的间距 3dp

layout_height 虚线高度 100dp