Kotlin by Lazy in Custom Views

Question

目前，在自定义视图中使用by Lazy会破坏其在Android Studio中的可视化效果。无法使用isEditMode，因为它仅在方法内可用，而不在可变初始化范围内。只有解决方法是使用lateinit和/或Delegates.notNull（）。

有没有解决方法呢？

示例：

class ImageViewCircleBg : ImageView {

    private var circleBgColor = R.color.colorPrimary
    private val paint by lazy {
        Paint().apply {
            style = Paint.Style.FILL
            isAntiAlias = true
        }
    }

    constructor(context: Context) : this(context, null)
    constructor(context: Context, attrs: AttributeSet?) : this(context, attrs, 0)
    constructor(context: Context, attrs: AttributeSet?, defStyleAttr: Int) : super(context, attrs, defStyleAttr) {

        val ta = context.theme.obtainStyledAttributes(attrs, R.styleable.ImageViewCircleBg, 0, 0)
        circleBgColor = ta.getColor(R.styleable.ImageViewCircleBg_roundBgColor, circleBgColor)
        ta.recycle()

        this.paint.color = circleBgColor
    }

在android studio设计窗口中产生以下错误：

The following classes could not be instantiated:
- ....ImageViewCircleBg (Open Class, Show Exception, Clear Cache)
 Tip: Use View.isInEditMode() in your custom views to skip code or show sample data when shown in the IDE  Exception Details java.lang.IncompatibleClassChangeError: Found class kotlin.Lazy, but interface was expected   at ...ImageViewCircleBg.getPaint(ImageViewCircleBg.kt:-1)

用懒惰代替：

private val paint: Paint

    init {
        paint = Paint().apply {
            style = Paint.Style.FILL
            isAntiAlias = true
        }
    }

解决问题。

错误：

java.lang.IncompatibleClassChangeError: Found class kotlin.lazy, but interface was expected