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resize.kt

  private fun makeViewFullWidth(view: View) {
        val point = Point()
        // point will be populated with screen width and height 
        activity?.windowManager?.defaultDisplay?.getSize(point)
        val param = view.layoutParams
        param.width = point.x
        param.height = point.y
        view.layoutParams = param
    }

ui.xml

 <FrameLayout
        android:id="@+id/imContainer"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:padding="@dimen/_5sdp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <ImageView
            android:id="@+id/imageView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center" />

    </FrameLayout>