Simple FrameLayout implementation

SimpleFrameLayout.kt

package id.thony.customview

import android.content.Context
import android.util.AttributeSet
import android.util.Log
import android.view.View
import android.view.ViewGroup
import androidx.core.view.children

class SimpleFrameLayout @JvmOverloads constructor(
    context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = 0
) : ViewGroup(context, attrs, defStyleAttr) {

    companion object {
        private val TAG = SimpleFrameLayout::class.java.simpleName

        private fun d(message: String, throwable: Throwable? = null) = if (throwable == null) {
            Log.d(TAG, message)
        } else {
            Log.d(TAG, message, throwable)
        }
    }

    override fun generateDefaultLayoutParams(): LayoutParams {
        return MarginLayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)
    }

    override fun generateLayoutParams(attrs: AttributeSet?): LayoutParams {
        return MarginLayoutParams(context, attrs)
    }

    override fun generateLayoutParams(p: LayoutParams?): LayoutParams {
        return MarginLayoutParams(p)
    }

    override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
        val widthMode = MeasureSpec.getMode(widthMeasureSpec)
        val heightMode = MeasureSpec.getMode(heightMeasureSpec)
        val widthSize = MeasureSpec.getSize(widthMeasureSpec)
        val heightSize = MeasureSpec.getSize(heightMeasureSpec)

        setMeasuredDimension(widthSize, heightSize)

        children.forEach { child ->
            if (child.visibility == View.GONE) return@forEach

            measureChildWithMargins(
                child,
                widthMeasureSpec,
                0,
                heightMeasureSpec,
                0
            )
        }
    }

    override fun onLayout(changed: Boolean, l: Int, t: Int, r: Int, b: Int) {
        children.forEach { child ->
            if (child.visibility == View.GONE) return@forEach

            val childParams = child.layoutParams as MarginLayoutParams
            child.layout(
                paddingLeft + childParams.leftMargin,
                paddingTop + childParams.topMargin,
                paddingLeft + childParams.leftMargin + child.measuredWidth,
                paddingTop + childParams.topMargin + child.measuredHeight
            )
        }
    }
}

While mostly works, it doesn't support WRAP_CONTENT on height or width. To make it work, update the onMeasure implementation to setMeasuredDimension based on max bottom or max right that is used by the child views.