Add 'Updating' lesson list widget item

Author: alllexey

app/src/main/java/me/alllexey123/itmowidgets/ui/widgets/data/LessonListRepository.kt

@@ -3,7 +3,7 @@ package me.alllexey123.itmowidgets.ui.widgets.data
 object LessonListDataHolder {
     @Volatile
     private var data: LessonListWidgetData = LessonListWidgetData(
-        listOf(LessonListWidgetEntry.LessonListEnd)
+        listOf(LessonListWidgetEntry.Updating)
     )
 
     fun setData(newData: LessonListWidgetData) {

app/src/main/java/me/alllexey123/itmowidgets/ui/widgets/data/LessonListWidgetEntry.kt

@@ -7,6 +7,7 @@ sealed class LessonListWidgetEntry(open val layoutId: Int) {
     object FullDayEmpty : LessonListWidgetEntry(R.layout.item_lesson_list_empty)
     object NoMoreLessons : LessonListWidgetEntry(R.layout.item_lesson_list_no_more)
     object LessonListEnd : LessonListWidgetEntry(R.layout.item_lesson_list_end)
+    object Updating : LessonListWidgetEntry(R.layout.item_lesson_list_updating)
 
     // null to hide
     data class LessonData(

app/src/main/res/layout/item_lesson_list_updating.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:id="@+id/item_root">
+
+    <TextView
+        android:id="@+id/empty_view"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center"
+        android:padding="16dp"
+        android:text="Обновление данных..."
+        android:textAppearance="?android:attr/textAppearanceMedium"
+        android:textColor="?attr/colorOnSurface" />
+
+</LinearLayout>