Show message when list is empty

library/ui-strings/src/main/res/values/strings.xml

@@ -3191,7 +3191,8 @@
     <string name="open_poll_option_description">Voters see results as soon as they have voted</string>
     <string name="closed_poll_option_title">Closed poll</string>
     <string name="closed_poll_option_description">Results are only revealed when you end the poll</string>
-    <string name="active_polls">Active polls</string>
+    <string name="room_polls_active">Active polls</string>
+    <string name="room_polls_active_no_item">There are no active polls in this room</string>
 
     <!-- Location -->
     <string name="location_activity_title_static_sharing">Share location</string>

vector/src/main/java/im/vector/app/features/roomprofile/polls/RoomPollsFragment.kt

@@ -66,7 +66,7 @@ class RoomPollsFragment : VectorBaseFragment<FragmentRoomPollsBinding>() {
 
         tabLayoutMediator = TabLayoutMediator(views.roomPollsTabs, views.roomPollsViewPager) { tab, position ->
             when (position) {
-                0 -> tab.text = getString(R.string.active_polls)
+                0 -> tab.text = getString(R.string.room_polls_active)
             }
         }.also { it.attach() }
     }

vector/src/main/java/im/vector/app/features/roomprofile/polls/active/RoomActivePollsFragment.kt

@@ -20,9 +20,11 @@ import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.core.view.isVisible
 import com.airbnb.mvrx.parentFragmentViewModel
 import com.airbnb.mvrx.withState
 import dagger.hilt.android.AndroidEntryPoint
+import im.vector.app.R
 import im.vector.app.core.extensions.cleanup
 import im.vector.app.core.extensions.configureWith
 import im.vector.app.core.platform.VectorBaseFragment
@@ -55,7 +57,8 @@ class RoomActivePollsFragment :
 
     private fun setupList() {
         roomActivePollsController.listener = this
-        views.activePollsList.configureWith(roomActivePollsController)
+        views.roomPollsList.configureWith(roomActivePollsController)
+        views.roomPollsEmptyTitle.text = getString(R.string.room_polls_active_no_item)
     }
 
     override fun onDestroyView() {
@@ -64,7 +67,7 @@ class RoomActivePollsFragment :
     }
 
     private fun cleanUpList() {
-        views.activePollsList.cleanup()
+        views.roomPollsList.cleanup()
         roomActivePollsController.listener = null
     }
 
@@ -79,6 +82,7 @@ class RoomActivePollsFragment :
 
     private fun renderList(polls: List<PollSummary.ActivePoll>) {
         roomActivePollsController.setData(polls)
+        views.roomPollsEmptyTitle.isVisible = polls.isEmpty()
     }
 
     override fun onPollClicked(pollId: String) {

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

@@ -6,7 +6,7 @@
     android:layout_height="match_parent">
 
     <androidx.recyclerview.widget.RecyclerView
-        android:id="@+id/activePollsList"
+        android:id="@+id/roomPollsList"
         android:layout_width="0dp"
         android:layout_height="0dp"
         android:layout_marginHorizontal="@dimen/layout_horizontal_margin"
@@ -17,5 +17,26 @@
         tools:itemCount="5"
         tools:listitem="@layout/item_poll_active" />
 
+    <TextView
+        android:id="@+id/roomPollsEmptyTitle"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginHorizontal="@dimen/layout_horizontal_margin"
+        android:layout_marginBottom="@dimen/layout_vertical_margin"
+        android:gravity="center"
+        android:textAppearance="@style/TextAppearance.Vector.Body"
+        android:textColor="?vctr_content_secondary"
+        android:visibility="gone"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="@id/roomPollsEmptyGuideline"
+        tools:text="@string/room_polls_active_no_item" />
+
+    <androidx.constraintlayout.widget.Guideline
+        android:id="@+id/roomPollsEmptyGuideline"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal"
+        app:layout_constraintGuide_percent="0.33" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>