Adds centering of items with no subtitles

vector/src/main/java/im/vector/app/features/home/room/list/RoomSummaryItem.kt

@@ -19,9 +19,9 @@ package im.vector.app.features.home.room.list
 import android.view.HapticFeedbackConstants
 import android.view.View
 import android.widget.ImageView
+import android.widget.Space
 import android.widget.TextView
 import androidx.constraintlayout.widget.ConstraintLayout
-import androidx.constraintlayout.widget.ConstraintSet
 import androidx.core.view.isInvisible
 import androidx.core.view.isVisible
 import com.airbnb.epoxy.EpoxyAttribute
@@ -141,27 +141,11 @@ abstract class RoomSummaryItem : VectorEpoxyModel<RoomSummaryItem.Holder>() {
 
     private fun renderForFilteredDisplayMode(holder: Holder) {
         holder.subtitleView.text = subtitle
-        if (subtitle.isEmpty()) {
+        holder.centerTitle(shouldCenter = subtitle.isEmpty())
-           holder.centerTitleVertically()
-        }
     }
 
-    private fun Holder.centerTitleVertically() {
+    private fun Holder.centerTitle(shouldCenter: Boolean) {
-        removeTitleTopMargin()
+        centerTitleSpace.isVisible = shouldCenter
-        constrainTitleToParentBottom()
-    }
-
-    private fun Holder.removeTitleTopMargin() {
-        val layoutParams = titleView.layoutParams as ConstraintLayout.LayoutParams
-        layoutParams.topMargin = 0
-        titleView.layoutParams = layoutParams
-    }
-
-    private fun Holder.constrainTitleToParentBottom() {
-        val constraintSet = ConstraintSet()
-        constraintSet.clone(rootView)
-        constraintSet.connect(titleView.id, ConstraintSet.BOTTOM, rootView.id, ConstraintSet.BOTTOM)
-        constraintSet.applyTo(rootView)
     }
 
     override fun unbind(holder: Holder) {
@@ -198,5 +182,6 @@ abstract class RoomSummaryItem : VectorEpoxyModel<RoomSummaryItem.Holder>() {
         val roomAvatarFailSendingImageView by bind<ImageView>(R.id.roomAvatarFailSendingImageView)
         val roomAvatarPresenceImageView by bind<PresenceStateImageView>(R.id.roomAvatarPresenceImageView)
         val rootView by bind<ConstraintLayout>(R.id.itemRoomLayout)
+        val centerTitleSpace by bind<Space>(R.id.centerTitleSpace)
     }
 }

vector/src/main/res/layout/item_room.xml

@@ -112,13 +112,27 @@
         app:layout_constraintTop_toBottomOf="@id/roomAvatarContainer"
         tools:layout_marginStart="20dp" />
 
+    <Space
+        android:id="@+id/topMarginSpace"
+        android:layout_width="0dp"
+        android:layout_height="12dp"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <Space
+        android:id="@+id/centerTitleSpace"
+        android:layout_width="match_parent"
+        android:layout_height="15dp"
+        android:visibility="gone"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/topMarginSpace" />
+
     <TextView
         android:id="@+id/roomNameView"
         style="@style/Widget.Vector.TextView.Subtitle"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginStart="@dimen/layout_horizontal_margin"
-        android:layout_marginTop="12dp"
         android:layout_marginEnd="8dp"
         android:duplicateParentState="true"
         android:ellipsize="end"
@@ -130,7 +144,7 @@
         app:layout_constraintHorizontal_bias="0.0"
         app:layout_constraintHorizontal_chainStyle="packed"
         app:layout_constraintStart_toEndOf="@id/roomAvatarContainer"
-        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/centerTitleSpace"
         tools:text="@sample/users.json/data/displayName" />
 
     <ImageView