Д.З. по теме RecyclerView #2.

app/build.gradle

@@ -30,6 +30,12 @@ android {
     kotlinOptions {
         jvmTarget = '1.8'
     }
+    buildFeatures {
+        viewBinding = true
+    }
+    dataBinding {
+        enabled = true
+    }
 }
 
 dependencies {
@@ -41,4 +47,6 @@ dependencies {
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.3'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
+    implementation 'androidx.databinding:databinding-runtime:8.10.0'
+    implementation 'it.xabaras.android:recyclerview-swipedecorator:1.4'
 }

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

@@ -0,0 +1,51 @@
+package otus.gpb.recyclerview
+
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.recyclerview.widget.ListAdapter
+import otus.gpb.recyclerview.databinding.ChatItemBinding
+import android.view.View.INVISIBLE
+import android.view.View.VISIBLE
+
+class ChatAdapter: ListAdapter<ChatItem, ChatViewHolder>(ChatDiffCallback()) {
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ChatViewHolder {
+        val binding = ChatItemBinding.inflate(LayoutInflater.from(parent.context), parent, false)
+        return ChatViewHolder(binding)
+    }
+
+    override fun onBindViewHolder(holder: ChatViewHolder, position: Int) {
+        val chatItem = getItem(position)
+        val binding = holder.binding
+        binding.textName.setText(chatItem.name)
+        binding.textStatus.setText(chatItem.status)
+        binding.message.setText(chatItem.message)
+        binding.time.setText(chatItem.time)
+
+        binding.iconVerified.visibility = if (chatItem.verified) VISIBLE else INVISIBLE
+        binding.iconScam.visibility = if (chatItem.scam) VISIBLE else INVISIBLE
+        binding.iconMute.visibility = if (chatItem.mute) VISIBLE else INVISIBLE
+        binding.counter.visibility = if (chatItem.counter > 0) VISIBLE else INVISIBLE
+        binding.counter.text = chatItem.counter.toString()
+        binding.time.text = chatItem.time
+        binding.delivered.visibility = if (chatItem.delivered && !chatItem.read) VISIBLE else INVISIBLE
+
+        val id: Int? =  if (chatItem.read) R.drawable.doublecheck
+        else if (chatItem.delivered && !chatItem.read) R.drawable.check
+        else if (chatItem.delivered && chatItem.read) R.drawable.doublecheck
+        else null
+
+        if (id != null) {
+            binding.delivered.setImageResource(id)
+            binding.delivered.visibility = VISIBLE
+        }
+        else{
+            binding.delivered.visibility = INVISIBLE
+        }
+    }
+
+    fun submitNewList(list: List<ChatItem>){
+        submitList(list)
+    }
+}

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

@@ -0,0 +1,13 @@
+package otus.gpb.recyclerview
+
+import androidx.recyclerview.widget.DiffUtil
+
+class ChatDiffCallback: DiffUtil.ItemCallback<ChatItem>() {
+    override fun areItemsTheSame(oldItem: ChatItem, newItem: ChatItem): Boolean {
+        return oldItem.id == newItem.id
+    }
+
+    override fun areContentsTheSame(oldItem: ChatItem, newItem: ChatItem): Boolean {
+        return oldItem == newItem
+    }
+}

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

@@ -0,0 +1,15 @@
+package otus.gpb.recyclerview
+
+data class ChatItem(
+    val id: Int,
+    val name: String,
+    val status: String,
+    val message: String,
+    val counter: Int,
+    val verified: Boolean,
+    val mute: Boolean,
+    val scam: Boolean,
+    val delivered: Boolean,
+    val read: Boolean,
+    val time: String,
+)

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

@@ -0,0 +1,6 @@
+package otus.gpb.recyclerview
+
+import androidx.recyclerview.widget.RecyclerView.ViewHolder
+import otus.gpb.recyclerview.databinding.ChatItemBinding
+
+class ChatViewHolder(val binding: ChatItemBinding): ViewHolder(binding.root)

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

@@ -2,11 +2,131 @@ package otus.gpb.recyclerview
 
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import otus.gpb.recyclerview.databinding.ActivityMainBinding
+import androidx.recyclerview.widget.ItemTouchHelper
+import androidx.recyclerview.widget.RecyclerView
+import it.xabaras.android.recyclerview.swipedecorator.RecyclerViewSwipeDecorator
+import android.graphics.Canvas
+import androidx.recyclerview.widget.LinearLayoutManager
+import kotlin.random.Random
 
 class MainActivity : AppCompatActivity() {
+    private val binding: ActivityMainBinding by lazy {
+        ActivityMainBinding.inflate(layoutInflater)
+    }
+    private var chatList: MutableList<ChatItem> = mutableListOf()
+    private lateinit var adapter: ChatAdapter
+    var lastId = 0
+    var previousItemsCount = 0
+    private var pageLoad = false
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_main)
+        setContentView(binding.root)
+        adapter = ChatAdapter()
+        binding.recyclerView.adapter = adapter
+
+        val itemTouchHelper = ItemTouchHelper(object : ItemTouchHelper.SimpleCallback(
+            0, ItemTouchHelper.LEFT or ItemTouchHelper.RIGHT
+        ) {
+            override fun onMove(
+                recyclerView: RecyclerView,
+                viewHolder: RecyclerView.ViewHolder,
+                target: RecyclerView.ViewHolder
+            ): Boolean {
+                return false
+            }
+
+            override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {
+                val position = viewHolder.adapterPosition
+                when(direction){
+                    ItemTouchHelper.LEFT -> {
+                        removeItem(position)
+                    }
+                    ItemTouchHelper.RIGHT -> {
+                        removeItem(position)
+                    }
+                }
+            }
+
+            override fun onChildDraw(
+                c: Canvas,
+                recyclerView: RecyclerView,
+                viewHolder: RecyclerView.ViewHolder,
+                dX: Float,
+                dY: Float,
+                actionState: Int,
+                isCurrentlyActive: Boolean
+            ) {
+                RecyclerViewSwipeDecorator.Builder(
+                    c,
+                    recyclerView,
+                    viewHolder,
+                    dX,
+                    dY,
+                    actionState,
+                    isCurrentlyActive
+                ).create().decorate()
+                super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive)
+            }
+        })
+        itemTouchHelper.attachToRecyclerView(binding.recyclerView)
+        createItems(20)
+        setScrollListener()
+    }
+
+    private fun setScrollListener(){
+        binding.recyclerView.addOnScrollListener(object : RecyclerView.OnScrollListener() {
+
+            override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
+                super.onScrolled(recyclerView, dx, dy)
+                val layoutManager = recyclerView.layoutManager as LinearLayoutManager
+                val itemsCount = layoutManager.itemCount
+                val lastVisibleItem = layoutManager.findLastCompletelyVisibleItemPosition()
+                if (pageLoad && itemsCount > previousItemsCount) {
+                    pageLoad = false
+                    previousItemsCount = itemsCount
+                }
+                if (!pageLoad && lastVisibleItem >= itemsCount - 5) {
+                    getNextPage()
+                }
+            }
+        })
+    }
+
+
+    private fun getNextPage() {
+        pageLoad = true
+        createItems(20)
+    }
+
+    private fun removeItem(position: Int){
+        val item = adapter.currentList[position]
+        chatList.apply {
+            remove(item)
+        }
+        adapter.notifyItemRemoved(position)
+    }
+
+    private fun createItems(size: Int){
+        for (i in 1..size) {
+            chatList.add(
+                ChatItem(
+                    lastId++,
+                    "Name " + "$lastId",
+                    "status " + "$lastId",
+                    "Message " + "$lastId",
+                    Random.nextInt(10),
+                    Random.nextBoolean(),
+                    Random.nextBoolean(),
+                    Random.nextBoolean(),
+                    Random.nextBoolean(),
+                    Random.nextBoolean(),
+                    "12:10"
+                )
+            )
+        }
+        adapter.submitList(chatList)
+        adapter.notifyDataSetChanged()
     }
 }

app/src/main/res/drawable/check.xml

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="20dp" android:width="20dp" android:viewportWidth="24" android:viewportHeight="24"><path android:fillColor="#4994CB" android:pathData="M22,12A10,10 0 0,1 12,22A10,10 0 0,1 2,12A10,10 0 0,1 12,2A10,10 0 0,1 22,12M6,10L12,16L18,10L16.6,8.6L12,13.2L7.4,8.6L6,10Z" /></vector>

app/src/main/res/drawable/check1.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="18dp"
+    android:height="18dp"
+    android:viewportWidth="18"
+    android:viewportHeight="18">
+    <path
+        android:pathData="M3.176,9.842L6.37,12.706L14.823,5.294"
+        android:strokeLineJoin="round"
+        android:strokeWidth="1.5"
+        android:fillColor="#00000000"
+        android:strokeColor="#48A938"
+        android:strokeLineCap="round"/>
+</vector>

app/src/main/res/drawable/circle.xml

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:width="24dp" android:viewportWidth="24" android:viewportHeight="24"><path android:fillColor="#000000" android:pathData="M12,2A10,10 0 0,0 2,12A10,10 0 0,0 12,22A10,10 0 0,0 22,12A10,10 0 0,0 12,2Z" /></vector>

app/src/main/res/drawable/doublecheck.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="18dp"
+    android:height="18dp"
+    android:viewportWidth="18"
+    android:viewportHeight="18">
+    <path
+        android:pathData="M1.059,9.776L4.014,12.533L11.77,5.294M16.941,5.466L9.185,12.706L8.261,11.844"
+        android:strokeLineJoin="round"
+        android:strokeWidth="1.5"
+        android:fillColor="#00000000"
+        android:strokeColor="#48A938"
+        android:strokeLineCap="round"/>
+</vector>

app/src/main/res/drawable/mute.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="18dp"
+    android:height="19dp"
+    android:viewportWidth="18"
+    android:viewportHeight="19">
+    <path
+        android:pathData="M4.235,7.842C4.235,7.545 4.485,7.305 4.791,7.305H5.745L11.462,13.141V14.573C11.462,15.305 10.906,15.58 10.35,15.043L6.702,11.97H4.791C4.485,11.97 4.235,11.728 4.235,11.432V7.842Z"
+        android:fillColor="#BDC1C4"
+        android:fillType="evenOdd"/>
+    <path
+        android:pathData="M4.898,3.678C4.796,3.696 4.702,3.741 4.625,3.808C4.548,3.875 4.492,3.961 4.463,4.057C4.434,4.153 4.434,4.255 4.462,4.351C4.489,4.447 4.544,4.534 4.62,4.602L13.836,13.507C13.885,13.566 13.946,13.614 14.016,13.648C14.085,13.682 14.161,13.702 14.239,13.705C14.317,13.709 14.394,13.697 14.467,13.67C14.54,13.643 14.606,13.602 14.661,13.549C14.716,13.495 14.759,13.432 14.787,13.361C14.815,13.291 14.827,13.216 14.823,13.141C14.819,13.066 14.798,12.992 14.763,12.925C14.727,12.858 14.678,12.799 14.617,12.752L12.402,10.611V4.751C12.402,3.712 11.33,3.723 10.547,4.365L8.026,6.383L5.402,3.846C5.345,3.787 5.274,3.741 5.196,3.712C5.118,3.683 5.034,3.672 4.95,3.678C4.933,3.678 4.915,3.678 4.898,3.678Z"
+        android:fillColor="#BDC1C4"/>
+</vector>

app/src/main/res/drawable/scam.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="44dp"
+    android:height="17dp"
+    android:viewportWidth="44"
+    android:viewportHeight="17">
+    <path
+        android:pathData="M11.281,10.343C11.281,9.989 11.156,9.716 10.906,9.524C10.661,9.332 10.215,9.138 9.57,8.943C8.925,8.747 8.411,8.53 8.03,8.29C7.3,7.829 6.936,7.227 6.936,6.486C6.936,5.836 7.198,5.301 7.722,4.881C8.25,4.46 8.934,4.25 9.774,4.25C10.331,4.25 10.828,4.353 11.264,4.56C11.7,4.766 12.043,5.062 12.292,5.445C12.542,5.825 12.667,6.248 12.667,6.713H11.281C11.281,6.292 11.149,5.964 10.884,5.728C10.624,5.488 10.25,5.368 9.762,5.368C9.308,5.368 8.954,5.466 8.701,5.661C8.452,5.857 8.327,6.13 8.327,6.48C8.327,6.775 8.463,7.022 8.734,7.222C9.005,7.417 9.453,7.609 10.076,7.797C10.699,7.982 11.2,8.194 11.578,8.434C11.955,8.67 12.232,8.943 12.408,9.253C12.584,9.559 12.672,9.919 12.672,10.332C12.672,11.003 12.415,11.538 11.902,11.936C11.392,12.331 10.699,12.529 9.823,12.529C9.244,12.529 8.71,12.422 8.222,12.208C7.739,11.99 7.361,11.691 7.089,11.311C6.822,10.931 6.688,10.488 6.688,9.983H8.08C8.08,10.441 8.23,10.795 8.531,11.046C8.831,11.296 9.262,11.422 9.823,11.422C10.307,11.422 10.67,11.324 10.912,11.129C11.158,10.929 11.281,10.667 11.281,10.343Z"
+        android:fillColor="#E64646"/>
+    <path
+        android:pathData="M20.003,9.795C19.923,10.655 19.608,11.326 19.058,11.809C18.507,12.289 17.776,12.529 16.863,12.529C16.225,12.529 15.662,12.377 15.175,12.075C14.691,11.769 14.316,11.335 14.052,10.774C13.788,10.214 13.651,9.563 13.64,8.821V8.068C13.64,7.308 13.774,6.639 14.042,6.06C14.309,5.48 14.692,5.034 15.191,4.72C15.693,4.407 16.273,4.25 16.929,4.25C17.813,4.25 18.524,4.492 19.063,4.975C19.602,5.458 19.916,6.141 20.003,7.022H18.618C18.552,6.443 18.383,6.026 18.111,5.772C17.844,5.514 17.45,5.384 16.929,5.384C16.324,5.384 15.858,5.608 15.532,6.054C15.209,6.497 15.044,7.148 15.037,8.007V8.721C15.037,9.592 15.191,10.256 15.499,10.714C15.811,11.171 16.265,11.4 16.863,11.4C17.409,11.4 17.82,11.276 18.095,11.029C18.37,10.782 18.544,10.37 18.618,9.795H20.003Z"
+        android:fillColor="#E64646"/>
+    <path
+        android:pathData="M25.735,10.542H22.632L21.983,12.418H20.537L23.562,4.361H24.81L27.841,12.418H26.389L25.735,10.542ZM23.023,9.413H25.344L24.184,6.071L23.023,9.413Z"
+        android:fillColor="#E64646"/>
+    <path
+        android:pathData="M30.558,4.361L32.868,10.536L35.173,4.361H36.971V12.418H35.585V9.762L35.722,6.209L33.357,12.418H32.362L30.003,6.215L30.14,9.762V12.418H28.754V4.361H30.558Z"
+        android:fillColor="#E64646"/>
+    <path
+        android:pathData="M10.906,9.524C11.156,9.716 11.281,9.989 11.281,10.343C11.281,10.667 11.158,10.929 10.912,11.129C10.67,11.324 10.307,11.422 9.823,11.422C9.262,11.422 8.831,11.296 8.531,11.046C8.23,10.795 8.08,10.441 8.08,9.983H6.688C6.688,10.488 6.822,10.931 7.089,11.311C7.361,11.691 7.739,11.99 8.222,12.208C8.71,12.422 9.244,12.529 9.823,12.529C10.699,12.529 11.392,12.331 11.902,11.936C12.415,11.538 12.672,11.003 12.672,10.332C12.672,9.919 12.584,9.559 12.408,9.253C12.232,8.943 11.955,8.67 11.578,8.434C11.2,8.194 10.699,7.982 10.076,7.797C9.453,7.609 9.005,7.417 8.734,7.222C8.463,7.022 8.327,6.775 8.327,6.48C8.327,6.13 8.452,5.857 8.701,5.661C8.954,5.466 9.308,5.368 9.762,5.368C10.25,5.368 10.624,5.488 10.884,5.728C11.149,5.964 11.281,6.292 11.281,6.713H12.667C12.667,6.248 12.542,5.825 12.292,5.445C12.043,5.062 11.7,4.766 11.264,4.56C10.828,4.353 10.331,4.25 9.774,4.25C8.934,4.25 8.25,4.46 7.722,4.881C7.198,5.301 6.936,5.836 6.936,6.486C6.936,7.227 7.3,7.829 8.03,8.29C8.411,8.53 8.925,8.747 9.57,8.943C10.215,9.138 10.661,9.332 10.906,9.524ZM19.058,11.809C19.608,11.326 19.923,10.655 20.003,9.795H18.618C18.544,10.37 18.37,10.782 18.095,11.029C17.82,11.276 17.409,11.4 16.863,11.4C16.265,11.4 15.811,11.171 15.499,10.714C15.191,10.256 15.037,9.592 15.037,8.721V8.007C15.044,7.148 15.209,6.497 15.532,6.054C15.858,5.608 16.324,5.384 16.929,5.384C17.45,5.384 17.844,5.514 18.111,5.772C18.383,6.026 18.552,6.443 18.618,7.022H20.003C19.916,6.141 19.602,5.458 19.063,4.975C18.524,4.492 17.813,4.25 16.929,4.25C16.273,4.25 15.693,4.407 15.191,4.72C14.692,5.034 14.309,5.48 14.042,6.06C13.774,6.639 13.64,7.308 13.64,8.068V8.821C13.651,9.563 13.788,10.214 14.052,10.774C14.316,11.335 14.691,11.769 15.175,12.075C15.662,12.377 16.225,12.529 16.863,12.529C17.776,12.529 18.507,12.289 19.058,11.809ZM21.983,12.418L22.632,10.542H25.735L26.389,12.418H27.841L24.81,4.361H23.562L20.537,12.418H21.983ZM32.868,10.536L30.558,4.361H28.754V12.418H30.14V9.762L30.003,6.215L32.362,12.418H33.357L35.722,6.209L35.585,9.762V12.418H36.971V4.361H35.173L32.868,10.536ZM25.344,9.413H23.023L24.184,6.071L25.344,9.413Z"
+        android:fillColor="#E64646"
+        android:fillType="evenOdd"/>
+    <path
+        android:pathData="M0,2.125C0,0.951 0.946,0 2.112,0H41.888C43.054,0 44,0.951 44,2.125V14.875C44,16.049 43.054,17 41.888,17H2.112C0.946,17 0,16.049 0,14.875V2.125ZM2.112,0.708H41.888C42.666,0.708 43.296,1.343 43.296,2.125V14.875C43.296,15.657 42.666,16.292 41.888,16.292H2.112C1.334,16.292 0.704,15.657 0.704,14.875V2.125C0.704,1.343 1.334,0.708 2.112,0.708ZM10.906,9.524C11.156,9.716 11.281,9.989 11.281,10.343C11.281,10.667 11.158,10.929 10.912,11.129C10.67,11.324 10.307,11.422 9.823,11.422C9.262,11.422 8.831,11.296 8.531,11.046C8.23,10.795 8.08,10.441 8.08,9.983H6.688C6.688,10.488 6.822,10.931 7.089,11.311C7.361,11.691 7.739,11.99 8.222,12.208C8.71,12.422 9.244,12.529 9.823,12.529C10.699,12.529 11.392,12.331 11.902,11.936C12.415,11.538 12.672,11.003 12.672,10.332C12.672,9.919 12.584,9.559 12.408,9.253C12.232,8.943 11.955,8.67 11.578,8.434C11.2,8.194 10.699,7.982 10.076,7.797C9.453,7.609 9.005,7.417 8.734,7.222C8.463,7.022 8.327,6.775 8.327,6.48C8.327,6.13 8.452,5.857 8.701,5.661C8.954,5.466 9.308,5.368 9.762,5.368C10.25,5.368 10.624,5.488 10.884,5.728C11.149,5.964 11.281,6.292 11.281,6.713H12.667C12.667,6.248 12.542,5.825 12.292,5.445C12.043,5.062 11.7,4.766 11.264,4.56C10.828,4.353 10.331,4.25 9.774,4.25C8.934,4.25 8.25,4.46 7.722,4.881C7.198,5.301 6.936,5.836 6.936,6.486C6.936,7.227 7.3,7.829 8.03,8.29C8.411,8.53 8.925,8.747 9.57,8.943C10.215,9.138 10.661,9.332 10.906,9.524ZM19.058,11.809C19.608,11.326 19.923,10.655 20.003,9.795H18.618C18.544,10.37 18.37,10.782 18.095,11.029C17.82,11.276 17.409,11.4 16.863,11.4C16.265,11.4 15.811,11.171 15.499,10.714C15.191,10.256 15.037,9.592 15.037,8.721V8.007C15.044,7.148 15.209,6.497 15.532,6.054C15.858,5.608 16.324,5.384 16.929,5.384C17.45,5.384 17.844,5.514 18.111,5.772C18.383,6.026 18.552,6.443 18.618,7.022H20.003C19.916,6.141 19.602,5.458 19.063,4.975C18.524,4.492 17.813,4.25 16.929,4.25C16.273,4.25 15.693,4.407 15.191,4.72C14.692,5.034 14.309,5.48 14.042,6.06C13.774,6.639 13.64,7.308 13.64,8.068V8.821C13.651,9.563 13.788,10.214 14.052,10.774C14.316,11.335 14.691,11.769 15.175,12.075C15.662,12.377 16.225,12.529 16.863,12.529C17.776,12.529 18.507,12.289 19.058,11.809ZM21.983,12.418L22.632,10.542H25.735L26.389,12.418H27.841L24.81,4.361H23.562L20.537,12.418H21.983ZM32.868,10.536L30.558,4.361H28.754V12.418H30.14V9.762L30.003,6.215L32.362,12.418H33.357L35.722,6.209L35.585,9.762V12.418H36.971V4.361H35.173L32.868,10.536ZM25.344,9.413H23.023L24.184,6.071L25.344,9.413Z"
+        android:fillColor="#E64646"
+        android:fillType="evenOdd"/>
+</vector>

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

@@ -3,11 +3,15 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:background="@color/white"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     tools:context=".MainActivity">
 
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/recyclerView"
         android:layout_width="match_parent"
-        android:layout_height="match_parent" />
+        android:layout_height="match_parent"
+        app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
+        tools:listitem="@layout/chat_item" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>