image i want但是在实现它的时候它会变成这样enter image description here如何修复layout_height

<RelativeLayout
                            android:id="@+id/rel_top"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content">
                            <LinearLayout
                                android:id="@+id/lin_detail"
                                android:layout_width="match_parent"
                                android:layout_height="wrap_content"
                                android:background="@color/blackTrans80"
                                android:orientation="horizontal">
                             ...
                            </LinearLayout>
                         </RelativeLayout>

val relativeLayout = findViewById<RelativeLayout>(R.id.rel_top)
                            val thumbnailUrl = comicDetailAPI!!.data.comic_detail.thumbnail
                            setRelativeLayoutBackgroundWithThumbnail(relativeLayout, thumbnailUrl)

fun setRelativeLayoutBackgroundWithThumbnail(relativeLayout: RelativeLayout, thumbnailUrl: String) {
        val requestOptions = RequestOptions().centerCrop()
        Glide.with(relativeLayout)
            .load(thumbnailUrl)
            .apply(requestOptions)
            .into(object : SimpleTarget<Drawable>() {
                override fun onResourceReady(resource: Drawable, transition: Transition<in Drawable>?) {
                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
                        relativeLayout.background = resource
                    }
                }
            })
    }

如何在相对布局中固定layout_height