Android-Developer-Basic · OlegDemura · Jan 28, 2025
diff --git a/app/src/main/java/otus/gpb/recyclerview/Chat.kt b/app/src/main/java/otus/gpb/recyclerview/Chat.kt
@@ -0,0 +1,19 @@
+package otus.gpb.recyclerview
+
+import androidx.annotation.DrawableRes
+
+data class Chat(
+    val id: Long, //ID
+    val title: String, //Название чата
+    val lastMessage: String, //Последнее сообщение
+    val lastWriter: String?, //Последний писатель сообщения
+    val avatar: String, //Аватар
+    val checkBox: Boolean, //Выделен чат или нет.
+    val lock: Boolean, //Приватный чат.
+    val scam: Boolean, //SCAM
+    val mute: Boolean, //Отключен звук
+    val verified: Boolean, //Проверенный аккаунт
+    val dateMessage: String, //Время сообщения
+    val messageCheck: Boolean, //Прочитано сообщение
+    val online: Boolean? = null//Онлайн. Только для пользователей.
+)
diff --git a/app/src/main/java/otus/gpb/recyclerview/ChatAdapter.kt b/app/src/main/java/otus/gpb/recyclerview/ChatAdapter.kt
@@ -0,0 +1,96 @@
+package otus.gpb.recyclerview
+
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ImageView
+import android.widget.TextView
+import androidx.appcompat.content.res.AppCompatResources
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.ListAdapter
+import androidx.recyclerview.widget.RecyclerView
+import otus.gpb.recyclerview.ChatRepository.Companion.listChat
+
+class ChatAdapter : ListAdapter<Chat, ChatAdapter.ChatItemViewHolder>(ChatDiffCallback()) {
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ChatItemViewHolder {
+        val view = LayoutInflater
+            .from(parent.context)
+            .inflate(R.layout.chat_item, parent, false)
+        return ChatItemViewHolder(view)
+    }
+
+    override fun onBindViewHolder(holder: ChatItemViewHolder, position: Int) {
+        holder.bind(getItem(position))
+    }
+
+    fun removeItem(position: Int) {
+        listChat.removeAt(position)
+    }
+
+    inner class ChatItemViewHolder(view: View) : RecyclerView.ViewHolder(view) {
+
+        private val title = view.findViewById<TextView>(R.id.title)
+        private val nickNameMessage = view.findViewById<TextView>(R.id.nick_name_message)
+        private val textMessage = view.findViewById<TextView>(R.id.text_message)
+        private val lock = view.findViewById<ImageView>(R.id.lock_icon_image_view)
+        private val scam = view.findViewById<ImageView>(R.id.scam_image_view)
+        private val mute = view.findViewById<ImageView>(R.id.mute_image_view)
+        private val verified = view.findViewById<ImageView>(R.id.verified_image_view)
+        private val dateMessageAndCheck = view.findViewById<TextView>(R.id.date_message_and_check)
+        fun bind(chat: Chat) {
+            title.text = chat.title
+            nickNameMessage.text = chat.lastWriter
+            textMessage.text = chat.lastMessage
+            if (chat.lock) {
+                lock.layoutParams.width = ViewGroup.LayoutParams.WRAP_CONTENT
+            } else {
+                lock.layoutParams.width = 0
+            }
+
+            if (chat.scam) {
+                scam.layoutParams.width = ViewGroup.LayoutParams.WRAP_CONTENT
+            } else {
+                scam.layoutParams.width = 0
+            }
+
+            if (chat.mute) {
+                mute.layoutParams.width = ViewGroup.LayoutParams.WRAP_CONTENT
+            } else {
+                mute.layoutParams.width = 0
+            }
+
+            if (chat.verified) {
+                verified.layoutParams.width = ViewGroup.LayoutParams.WRAP_CONTENT
+            } else {
+                verified.layoutParams.width = 0
+            }
+
+            dateMessageAndCheck.text = chat.dateMessage
+
+            if (chat.messageCheck) {
+                val leftDrawable =
+                    AppCompatResources.getDrawable(itemView.context, R.drawable.check);
+                dateMessageAndCheck.setCompoundDrawablesWithIntrinsicBounds(leftDrawable, null, null, null);
+            } else{
+                val leftDrawable =
+                    AppCompatResources.getDrawable(itemView.context, R.drawable.two_check);
+                dateMessageAndCheck.setCompoundDrawablesWithIntrinsicBounds(leftDrawable, null, null, null);
+            }
+
+            if (chat.verified) {
+                verified.layoutParams.width = ViewGroup.LayoutParams.WRAP_CONTENT
+            } else {
+                verified.layoutParams.width = 0
+            }
+        }
+    }
+}
+
+class ChatDiffCallback : DiffUtil.ItemCallback<Chat>() {
+
+    override fun areItemsTheSame(oldItem: Chat, newItem: Chat): Boolean =
+        oldItem.id == newItem.id
+
+    override fun areContentsTheSame(oldItem: Chat, newItem: Chat): Boolean =
+        oldItem == newItem
+}
diff --git a/app/src/main/java/otus/gpb/recyclerview/ChatRepository.kt b/app/src/main/java/otus/gpb/recyclerview/ChatRepository.kt
@@ -0,0 +1,29 @@
+package otus.gpb.recyclerview
+
+class ChatRepository {
+
+    companion object {
+        var listChat = mutableListOf(
+            Chat(1, "Chat1", "Message1", "Writer1", "", false, false, false, false, true,"11:01", true),
+            Chat(2, "Chat2", "Message2", "Writer2", "", true, true, false, true, false,"11:02", false),
+            Chat(3, "Chat3", "Message3", "Writer3", "", false, false, false, false, false,"11:03", true),
+            Chat(4, "Chat4", "Message4", "Writer4", "", true, false, true, false, true,"11:04", true),
+            Chat(5, "Chat5", "Message5", "Writer5", "", true, true, false, false, true,"11:05", true),
+            Chat(6, "Chat6", "Message6", "Writer6", "", false, false, false, true, true,"11:06", false),
+            Chat(7, "Chat7", "Message7", "Writer7", "", true, false, false, false, false,"11:07", true),
+            Chat(8, "Chat8", "Message8", "Writer8", "", false, true, false, true, false,"11:08", true),
+            Chat(9, "Chat9", "Message9", "Writer9", "", true, false, true, false, true,"11:09", true),
+            Chat(10, "Chat10", "Message10", "Writer10", "", false, false, false, true, true,"11:10", true),
+            Chat(11, "Chat11", "Message11", "Writer11", "", false, false, false, false, true,"11:11", true),
+            Chat(12, "Chat12", "Message12", "Writer12", "", true, true, false, true, false,"11:12", true),
+            Chat(13, "Chat13", "Message13", "Writer13", "", false, false, false, false, false,"11:13", true),
+            Chat(14, "Chat14", "Message14", "Writer14", "", true, false, true, false, true,"11:14", false),
+            Chat(15, "Chat15", "Message15", "Writer15", "", true, true, false, false, true,"11:15", true),
+            Chat(16, "Chat16", "Message16", "Writer16", "", false, false, false, true, true,"11:16", false),
+            Chat(17, "Chat17", "Message17", "Writer17", "", true, false, false, false, false,"11:17", true),
+            Chat(18, "Chat18", "Message18", "Writer18", "", false, true, false, true, false,"11:18", true),
+            Chat(19, "Chat19", "Message19", "Writer19", "", true, false, true, false, true,"11:19", true),
+            Chat(20, "Chat20", "Message20", "Writer20", "", false, false, false, true, true,"11:20", true)
+        )
+    }
+}
diff --git a/app/src/main/java/otus/gpb/recyclerview/MainActivity.kt b/app/src/main/java/otus/gpb/recyclerview/MainActivity.kt
@@ -2,11 +2,65 @@ package otus.gpb.recyclerview
 
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import android.widget.Button
+import androidx.recyclerview.widget.ItemTouchHelper
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import otus.gpb.recyclerview.ChatRepository.Companion.listChat
 
 class MainActivity : AppCompatActivity() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
+
+        val recyclerView = findViewById<RecyclerView>(R.id.recyclerView)
+        val chatAdapter = ChatAdapter()
+        recyclerView.layoutManager = LinearLayoutManager(this)
+        recyclerView.adapter = chatAdapter
+        recyclerView.addItemDecoration(RecyclerViewItemDecoration(this, R.drawable.divider))
+
+        chatAdapter.submitList(listChat)
+
+        val button: Button = findViewById(R.id.add_button)
+        button.setOnClickListener {
+            listChat.add(
+                Chat(
+                    55,
+                    "Chat55",
+                    "Message55",
+                    "Writer55",
+                    "",
+                    false,
+                    false,
+                    false,
+                    false,
+                    true,
+                    "11:55",
+                    true,
+                )
+            )
+            chatAdapter.notifyDataSetChanged()
+        }
+
+        val itemTouchHelper =
+            ItemTouchHelper(object : ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT) {
+                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
+                    chatAdapter.removeItem(position)
+                    chatAdapter.notifyDataSetChanged()
+                }
+            })
+
+        itemTouchHelper.attachToRecyclerView(recyclerView)
     }
+
 }
diff --git a/app/src/main/java/otus/gpb/recyclerview/RecyclerViewItemDecoration.kt b/app/src/main/java/otus/gpb/recyclerview/RecyclerViewItemDecoration.kt
@@ -0,0 +1,35 @@
+package otus.gpb.recyclerview
+
+import android.content.Context
+import android.graphics.Canvas
+import android.graphics.drawable.Drawable
+import androidx.core.content.ContextCompat
+import androidx.recyclerview.widget.RecyclerView
+
+class RecyclerViewItemDecoration(
+    context: Context,
+    resId: Int
+) : RecyclerView.ItemDecoration() {
+
+    private var mDivider: Drawable = ContextCompat.getDrawable(context, resId)!!
+
+    override fun onDraw(c: Canvas, parent: RecyclerView, state: RecyclerView.State) {
+        super.onDraw(c, parent, state)
+
+        val dividerLeft = 32
+
+        val dividerRight = parent.width - 32
+
+        for (i in 0 until parent.childCount) {
+
+            val childAt = parent.getChildAt(i)
+            val params = childAt.layoutParams as RecyclerView.LayoutParams
+
+            val dividerTop: Int = childAt.bottom + params.bottomMargin
+            val dividerBottom: Int = dividerTop + mDivider.intrinsicHeight
+
+            mDivider.setBounds(dividerLeft, dividerTop, dividerRight, dividerBottom)
+            mDivider.draw(c)
+        }
+    }
+}
diff --git a/app/src/main/res/drawable/action_button.xml b/app/src/main/res/drawable/action_button.xml
@@ -0,0 +1,12 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="59dp"
+    android:height="59dp"
+    android:viewportWidth="59"
+    android:viewportHeight="59">
+  <path
+      android:pathData="M29.5,28.5m-26.5,0a26.5,26.5 0,1 1,53 0a26.5,26.5 0,1 1,-53 0"
+      android:fillColor="#51AEE7"/>
+  <path
+      android:pathData="M38.675,22.491C39.108,22.058 39.108,21.336 38.675,20.925L36.075,18.325C35.664,17.892 34.942,17.892 34.509,18.325L32.465,20.358L36.631,24.524L38.675,22.491ZM19,33.834V38H23.166L35.453,25.702L31.287,21.536L19,33.834Z"
+      android:fillColor="#ffffff"/>
+</vector>
diff --git a/app/src/main/res/drawable/check.xml b/app/src/main/res/drawable/check.xml
@@ -0,0 +1,13 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="14dp"
+    android:height="10dp"
+    android:viewportWidth="14"
+    android:viewportHeight="10">
+  <path
+      android:pathData="M1,5.909L4.29,9L13,1"
+      android:strokeLineJoin="round"
+      android:strokeWidth="1.75926"
+      android:fillColor="#00000000"
+      android:strokeColor="#48A938"
+      android:strokeLineCap="round"/>
+</vector>
diff --git a/app/src/main/res/drawable/divider.xml b/app/src/main/res/drawable/divider.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <size android:height="2dp" />
+    <solid android:color="@color/devider" />
+</shape>
diff --git a/app/src/main/res/drawable/lock.xml b/app/src/main/res/drawable/lock.xml
@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="10dp"
+    android:height="14dp"
+    android:viewportWidth="10"
+    android:viewportHeight="14">
+  <path
+      android:pathData="M10,7.557V12.386C10,13.001 9.537,13.5 8.966,13.5H1.034C0.463,13.5 0,13.001 0,12.386V7.557C0,6.942 0.463,6.443 1.034,6.443H1.552V4.214C1.552,2.976 2.241,0.5 5,0.5C7.759,0.5 8.448,2.976 8.448,4.214V6.443H8.966C9.537,6.443 10,6.942 10,7.557ZM7.069,4.214V6.443H2.931V4.214C2.931,3.471 3.345,1.986 5,1.986C6.655,1.986 7.069,3.471 7.069,4.214Z"
+      android:fillColor="#47A938"
+      android:fillType="evenOdd"/>
+</vector>
diff --git a/app/src/main/res/drawable/mute.xml b/app/src/main/res/drawable/mute.xml
@@ -0,0 +1,13 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="9dp"
+    android:height="12dp"
+    android:viewportWidth="9"
+    android:viewportHeight="12">
+  <path
+      android:pathData="M0,4.434C0,4.154 0.212,3.927 0.472,3.927H1.283L6.142,9.439V10.791C6.142,11.482 5.67,11.742 5.197,11.235L2.097,8.332H0.472C0.212,8.332 0,8.104 0,7.825V4.434Z"
+      android:fillColor="#BDC1C4"
+      android:fillType="evenOdd"/>
+  <path
+      android:pathData="M0.563,0.502C0.477,0.519 0.397,0.561 0.331,0.624C0.266,0.687 0.218,0.769 0.194,0.859C0.169,0.95 0.169,1.046 0.192,1.137C0.216,1.228 0.263,1.31 0.327,1.374L8.16,9.785C8.202,9.84 8.254,9.885 8.313,9.917C8.372,9.95 8.437,9.968 8.503,9.972C8.569,9.976 8.635,9.964 8.697,9.939C8.759,9.913 8.815,9.874 8.862,9.824C8.909,9.774 8.945,9.713 8.969,9.647C8.992,9.581 9.003,9.51 8.999,9.439C8.996,9.368 8.979,9.298 8.948,9.235C8.918,9.171 8.876,9.116 8.825,9.071L6.942,7.05V1.515C6.942,0.534 6.03,0.544 5.365,1.15L3.222,3.056L0.992,0.66C0.943,0.604 0.883,0.561 0.817,0.534C0.75,0.506 0.679,0.495 0.608,0.502C0.593,0.501 0.578,0.501 0.563,0.502Z"
+      android:fillColor="#BDC1C4"/>
+</vector>