Using lparams in CardView's direct children causes ClassCastException

[SuhairZain]

Hi,
I have a DSL similar to the following:

cardView {
  cardElevation = dip(6).toFloat()
  useCompatPadding = true

  relativeLayout {
    textView {
      text = "TESTING"
    }.lparams { margin = dip(8) }
  }.lparams { width = matchParent } //Problematic line
}.lparams { width = matchParent ; centerInParent() }

But this throws the following exception:

java.lang.ClassCastException: android.widget.RelativeLayout$LayoutParams cannot be cast to android.widget.FrameLayout$LayoutParams
at android.widget.FrameLayout.onMeasure(FrameLayout.java:195)
at android.support.v7.widget.CardView.onMeasure(CardView.java:211)
at android.view.View.measure(View.java:18788)

Because of this line https://android.googlesource.com/platform/frameworks/support/+/master/v7/cardview/src/android/support/v7/widget/CardView.java#211 that calls super.onMeasure(widthMeasureSpec, heightMeasureSpec); which in turn calls https://chromium.googlesource.com/android_tools/+/master/sdk/sources/android-23/android/widget/FrameLayout.java#195 or final LayoutParams lp = (LayoutParams) child.getLayoutParams();

Here, the RelativeLayout.LayoutParams is typecasted to FrameLayout.LayoutParams which causes the exception. IIRC, the LayoutParams is choosen by Anko depending on the parent which should have been FrameLayout.LayoutParams for a CardView but is chosen as RelativeLayout.LayoutParams. For the time being, I've found a workaround which is given below.

cardView {
  cardElevation = dip(6).toFloat()
  useCompatPadding = true

  relativeLayout {
    textView {
      text = "TESTING"
    }.lparams { margin = dip(8) }
  }.layoutParams = FrameLayout.LayoutParams( //Explicitly create a FrameLayout.LayoutParams
    FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.WRAP_CONTENT
  )
}.lparams { width = matchParent ; centerInParent() }

I'd like to know if this is a bug in Anko or if I'm doing something wrong. Please advice.

[yanex]

The erroneous lparams() from the RelativeView is now forbidden by DslMarker annotation.
The problem now is the lack of lparams() inside the CardView.

[4u7]

Fixed with 7c64c4b