Done

app/build.gradle

@@ -4,7 +4,7 @@ plugins {
 }
 
 android {
-    compileSdk 34
+    compileSdk 35
     namespace "otus.gpb.recyclerview"
 
     defaultConfig {
@@ -27,18 +27,23 @@ android {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
+    buildFeatures
+    {
+        viewBinding = true
+    }
     kotlinOptions {
         jvmTarget = '1.8'
     }
 }
 
 dependencies {
 
-    implementation 'androidx.core:core-ktx:1.7.0'
-    implementation 'androidx.appcompat:appcompat:1.5.1'
-    implementation 'com.google.android.material:material:1.7.0'
-    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
+    implementation 'androidx.core:core-ktx:1.16.0'
+    implementation 'androidx.appcompat:appcompat:1.7.0'
+    implementation 'com.google.android.material:material:1.12.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.2.1'
+    implementation 'com.github.bumptech.glide:glide:4.16.0'
     testImplementation 'junit:junit:4.13.2'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
+    androidTestImplementation 'androidx.test.ext:junit:1.2.1'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.6.1'
 }

app/src/main/AndroidManifest.xml

@@ -2,6 +2,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
+    <uses-permission android:name="android.permission.INTERNET" />
+
     <application
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"

app/src/main/java/otus/gpb/recyclerview/MainActivity.kt

@@ -1,12 +1,164 @@
 package otus.gpb.recyclerview
 
+import android.annotation.SuppressLint
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import androidx.core.content.res.ResourcesCompat
+import androidx.recyclerview.widget.ItemTouchHelper
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import otus.gpb.recyclerview.data.ChatItem
+import otus.gpb.recyclerview.data.GroupChat
+import otus.gpb.recyclerview.data.PersonChat
+import otus.gpb.recyclerview.data.groupChatList
+import otus.gpb.recyclerview.data.personChatList
+import otus.gpb.recyclerview.databinding.ActivityMainBinding
+import otus.gpb.recyclerview.ui.ChatAdapter
+import otus.gpb.recyclerview.ui.CustomDecorator
+import kotlin.random.Random
+import androidx.recyclerview.widget.RecyclerView.OnScrollListener
+import otus.gpb.recyclerview.ui.ItemTouchHelperCallback
+
 
 class MainActivity : AppCompatActivity() {
 
+    private var chatItems: List<ChatItem> = emptyList()
+
+    private lateinit var binding: ActivityMainBinding
+    private lateinit var adapter: ChatAdapter
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_main)
+        binding = ActivityMainBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        binding.recyclerView.addItemDecoration(CustomDecorator(this).apply {
+            setColor(R.color.color_chat_divider_light)
+            setOffset(R.integer.dividerOffset)
+        })
+
+        binding.recyclerView.layoutManager = LinearLayoutManager(this)
+        adapter = ChatAdapter()
+
+        binding.recyclerView.adapter = adapter
+
+        chatItems = generateList()
+        adapter.submitList(chatItems)
+
+        binding.recyclerView.addOnScrollListener(object : OnScrollListener() {
+            override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
+                super.onScrolled(recyclerView, dx, dy)
+
+                val layoutManager = recyclerView.layoutManager as LinearLayoutManager
+                val totalItemCount = layoutManager.itemCount
+                val lastVisible = layoutManager.findLastVisibleItemPosition()
+
+                if (lastVisible > totalItemCount - 4) {
+                    chatItems += generateList(chatItems.size)
+                    adapter.submitList(chatItems)
+                }
+            }
+        })
+
+        val itemTouchCallback = ItemTouchHelperCallback(::getChatItems,::setChatItems).apply {
+            setSwipeEdgeParams(
+                resources.getInteger(R.integer.swipeEdgeCornerRadius),
+                resources.getColor(R.color.color_primary_light),
+                resources.getColor(R.color.color_chat_background_on_swipe_light)
+                )
+            ResourcesCompat.getDrawable(resources, R.drawable.icon_archive, theme)
+                ?.let { setArchIcon(it, 20, 20, 20,
+                    resources.getString(R.string.arch_icon_text)) }
+        }
+        ItemTouchHelper(itemTouchCallback).attachToRecyclerView(binding.recyclerView)
     }
-}
+
+    private fun getChatItems() = chatItems
+    private fun setChatItems(list: List<ChatItem>) {
+        chatItems = list
+        adapter.submitList(list)
+    }
+
+    private fun getRandomBool() = Random.nextInt(0, 2) > 0
+
+    @SuppressLint("DefaultLocale")
+    private fun getRandomTime() : String {
+        val hour = Random.nextInt(0, 24)
+        val min = Random.nextInt(0, 60)
+        return String.format("%d:%02d", hour, min)
+    }
+
+    private fun randomizeGroupChat(item: GroupChat, offset: Int) : GroupChat {
+        return GroupChat(
+            id = item.id + offset,
+            groupName = item.groupName,
+            lastAuthor = item.lastAuthor,
+            lastMessage = item.lastMessage,
+            avatarUrl = item.avatarUrl,
+            messagePreviewUrl = item.messagePreviewUrl,
+            voip = getRandomBool(),
+            verified = getRandomBool(),
+            muted = getRandomBool(),
+            time = getRandomTime(),
+            checked = getRandomBool(),
+            read = getRandomBool(),
+            mentioned = getRandomBool(),
+            pinned = getRandomBool(),
+            counter = if (Random.nextInt(0, 5) > 0) 0 else {
+                Random.nextInt(1, 199)
+            }
+        )
+    }
+
+    private fun randomizePersonChat(item: PersonChat, offset: Int) : PersonChat {
+        return PersonChat(
+            id = item.id + offset,
+            personName = item.personName,
+            lastMessage = item.lastMessage,
+            avatarUrl = item.avatarUrl,
+            messagePreviewUrl = item.messagePreviewUrl,
+            checkbox = getRandomBool(),
+            online = getRandomBool(),
+            locked = getRandomBool(),
+            scam = if (Random.nextInt(0, 5) > 0) false else getRandomBool(),
+            verified = getRandomBool(),
+            muted = getRandomBool(),
+            time = getRandomTime(),
+            checked = getRandomBool(),
+            read = getRandomBool(),
+            mentioned = getRandomBool(),
+            pinned = getRandomBool(),
+            counter = if (Random.nextInt(0, 5) > 0) 0 else {
+                Random.nextInt(1, 19)
+            }
+        )
+    }
+
+    private fun generateList(startId: Int = 0) : List<ChatItem> {
+        if (startId == 0) {
+            return listOf(
+                personChatList[0],
+                groupChatList[0],
+                personChatList[1],
+                groupChatList[1],
+                groupChatList[2],
+                personChatList[2],
+                groupChatList[3],
+                personChatList[3]
+            )
+        }
+        else {
+            return listOf(
+                randomizePersonChat(personChatList[0], startId),
+                randomizeGroupChat(groupChatList[0], startId),
+                randomizePersonChat(personChatList[1], startId),
+                randomizeGroupChat(groupChatList[1], startId),
+                randomizeGroupChat(groupChatList[2], startId),
+                randomizePersonChat(personChatList[2], startId),
+                randomizeGroupChat(groupChatList[3], startId),
+                randomizePersonChat(personChatList[3], startId)
+            )
+        }
+    }
+}
+

app/src/main/java/otus/gpb/recyclerview/data/ChatItem.kt

@@ -0,0 +1,5 @@
+package otus.gpb.recyclerview.data
+
+interface ChatItem {
+    val id: Int
+}

app/src/main/java/otus/gpb/recyclerview/data/GroupChat.kt

@@ -0,0 +1,90 @@
+package otus.gpb.recyclerview.data
+
+data class GroupChat (
+    override var id: Int,
+    val groupName: String,
+    val lastAuthor: String,
+    val lastMessage: String,
+    val avatarUrl: String,
+    val messagePreviewUrl: String,
+    var voip: Boolean,
+    var verified: Boolean,
+    var muted: Boolean,
+    val time: String,
+    var checked: Boolean,
+    var read: Boolean,
+    var mentioned: Boolean,
+    var pinned: Boolean,
+    var counter: Int
+) : ChatItem
+
+val groupChatList = listOf(
+    GroupChat(
+        id = 1,
+        groupName = "SnejUgal News",
+        lastAuthor = "Nikolay",
+        lastMessage = "F",
+        avatarUrl = "https://upload.wikimedia.org/wikipedia/commons/thumb/6/64/Fishfinger_classic_fried_2.jpg/2560px-Fishfinger_classic_fried_2.jpg",
+        messagePreviewUrl = "https://upload.wikimedia.org/wikipedia/commons/thumb/9/95/Moscow_%288351271825%29.jpg/500px-Moscow_%288351271825%29.jpg",
+        voip = true,
+        verified = false,
+        muted = true,
+        time = "11:38",
+        checked = false,
+        read = false,
+        mentioned = true,
+        pinned = true,
+        counter = 0
+    ),
+    GroupChat(
+        id = 2,
+        groupName = "Unknown",
+        lastAuthor = "",
+        lastMessage = "!Don't swipe me!",
+        avatarUrl = "",
+        messagePreviewUrl = "",
+        voip = true,
+        verified = false,
+        muted = true,
+        time = "11:38",
+        checked = false,
+        read = true,
+        mentioned = true,
+        pinned = false,
+        counter = 0
+    ),
+    GroupChat(
+        id = 3,
+        groupName = "just design",
+        lastAuthor = "You",
+        lastMessage = "I want pizza",
+        avatarUrl = "",
+        messagePreviewUrl = "",
+        voip = false,
+        verified = false,
+        muted = true,
+        time = "11:38",
+        checked = true,
+        read = false,
+        mentioned = false,
+        pinned = false,
+        counter = 0
+    ),
+    GroupChat(
+        id = 4,
+        groupName = "Yes. No",
+        lastAuthor = "Anno",
+        lastMessage = "I see all :))",
+        avatarUrl = "",
+        messagePreviewUrl = "",
+        voip = false,
+        verified = true,
+        muted = false,
+        time = "11:38",
+        checked = true,
+        read = false,
+        mentioned = false,
+        pinned = false,
+        counter = 50
+    )
+)