Homework

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

@@ -1,12 +1,129 @@
 package otus.gpb.recyclerview
 
+import ChatAdapter
+import CustomDividerItemDecoration
+import android.graphics.Canvas
+import android.graphics.Color
+import android.graphics.Paint
+import android.graphics.RectF
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import androidx.core.content.ContextCompat
+import androidx.recyclerview.widget.ItemTouchHelper
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import otus.gpb.recyclerview.models.Chat
+import androidx.core.graphics.toColorInt
 
 class MainActivity : AppCompatActivity() {
+    private val chatAdapter = ChatAdapter()
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
+
+        val recyclerView = findViewById<RecyclerView>(R.id.recyclerView)
+
+        recyclerView.layoutManager = LinearLayoutManager(this)
+        recyclerView.adapter = chatAdapter
+
+        val dividerItemDecoration = CustomDividerItemDecoration(this, R.drawable.divider_line)
+        recyclerView.addItemDecoration(dividerItemDecoration)
+
+        setupSwipe(recyclerView)
+
+        chatAdapter.submitList(getMockData())
+    }
+
+    private fun setupSwipe(recyclerView: RecyclerView) {
+        val swipeCallback = object : ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT) {
+
+            override fun onMove(
+                rv: RecyclerView,
+                vh: RecyclerView.ViewHolder,
+                t: RecyclerView.ViewHolder
+            ) = false
+
+            override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {
+                val position = viewHolder.adapterPosition
+                val currentList = chatAdapter.currentList.toMutableList()
+                currentList.removeAt(position)
+                chatAdapter.submitList(currentList)
+            }
+
+            override fun onChildDraw(
+                c: Canvas,
+                recyclerView: RecyclerView,
+                viewHolder: RecyclerView.ViewHolder,
+                dX: Float,
+                dY: Float,
+                actionState: Int,
+                isCurrentlyActive: Boolean
+            ) {
+                val itemView = viewHolder.itemView
+                val paint = Paint()
+                if (dX < 0) {
+                    paint.color = "#66A9E0".toColorInt()
+                    val background = RectF(
+                        itemView.right.toFloat() + dX,
+                        itemView.top.toFloat(),
+                        itemView.right.toFloat(),
+                        itemView.bottom.toFloat()
+                    )
+                    c.drawRect(background, paint)
+
+                    if (Math.abs(dX) > 100) {
+                        val icon =
+                            ContextCompat.getDrawable(this@MainActivity, R.drawable.ic_archive)
+                        icon?.let {
+                            val iconSize = (itemView.height * 0.37).toInt()
+                            val iconMarginRight = 58
+
+                            val iconTop = itemView.top + (itemView.height / 2) - iconSize
+                            val iconBottom = iconTop + iconSize
+                            val iconRight = itemView.right - iconMarginRight
+                            val iconLeft = iconRight - iconSize
+
+                            it.setBounds(iconLeft, iconTop, iconRight, iconBottom)
+                            it.setTint(Color.WHITE)
+                            it.draw(c)
+
+                            paint.color = Color.WHITE
+                            paint.textSize = 28f
+                            paint.isAntiAlias = true
+                            paint.textAlign = Paint.Align.CENTER
+
+                            val textX = (iconLeft + iconRight) / 2f
+                            val textY = iconBottom + 33f
+                            c.drawText("Archive", textX, textY, paint)
+                        }
+                    }
+                }
+
+                super.onChildDraw(
+                    c,
+                    recyclerView,
+                    viewHolder,
+                    dX,
+                    dY,
+                    actionState,
+                    isCurrentlyActive
+                )
+            }
+        }
+
+        val itemTouchHelper = ItemTouchHelper(swipeCallback)
+        itemTouchHelper.attachToRecyclerView(recyclerView)
+    }
+
+    private fun getMockData(): List<Chat> {
+        return listOf(
+            Chat(1, "Elon", "I love X", "14:00",  isScam = false,isMuted =false, isOutgoing = false,avatarRes = R.drawable.avatar_elon),
+            Chat(2, "OTUS Bacic-android-2025-07", "Иди делать домашку", "Wed",  isScam = false,isMuted =false,isOutgoing = false,avatarRes = R.drawable.avatar_otus),
+            Chat(3, "Arnold", "I'll be back", "14:45", isVerified = true, isOutgoing = false,avatarRes = R.drawable.avatar_arnold),
+            Chat(4, "Telegram Support", "Login code: 123", "12:00", isVerified = true, isRead = true, isOutgoing = true,avatarRes = R.drawable.avatar_telega),
+            Chat(5, "Crypto King", "Give me money", "Yesterday", isScam = true, isRead = false, isOutgoing = true,avatarRes = R.drawable.avatar_bitcoin),
+            Chat(6, "Классная гусеница", "Ок", "10:00", isMuted = true, isOutgoing = false,avatarRes = R.drawable.avatar_cool)
+        )
     }
-}
+}

app/src/main/java/otus/gpb/recyclerview/models/Chat.kt

@@ -0,0 +1,16 @@
+package otus.gpb.recyclerview.models
+
+data class Chat(
+    val id: Int,
+    val title: String,
+    val lastMessage: String,
+    val time: String,
+    val isScam: Boolean = false,
+    val isMuted: Boolean = false,
+    val isOutgoing: Boolean,
+    val avatar: String? = null,
+    val isVerified: Boolean = false,
+    val isRead: Boolean = false,
+    val avatarRes: Int,
+
+)

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

@@ -0,0 +1,60 @@
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ImageView
+import android.widget.TextView
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.ListAdapter
+import androidx.recyclerview.widget.RecyclerView
+import otus.gpb.recyclerview.R
+import otus.gpb.recyclerview.models.Chat
+
+class ChatAdapter : ListAdapter<Chat, ChatAdapter.ChatViewHolder>(ChatDiffCallback()) {
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ChatViewHolder {
+        val view = LayoutInflater.from(parent.context).inflate(R.layout.item_chat, parent, false)
+        return ChatViewHolder(view)
+    }
+
+    override fun onBindViewHolder(holder: ChatViewHolder, position: Int) {
+        holder.bind(getItem(position))
+    }
+
+    class ChatViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
+        private val lastMessage = itemView.findViewById<TextView>(R.id.LastMessage)
+        private val time = itemView.findViewById<TextView>(R.id.Time)
+        private val verified = itemView.findViewById<ImageView>(R.id.Verified)
+        private val scam = itemView.findViewById<TextView>(R.id.Scam)
+        private val mute = itemView.findViewById<ImageView>(R.id.Mute)
+
+        fun bind(chat: Chat) {
+            val title = itemView.findViewById<TextView>(R.id.Title)
+            val statusIcon = itemView.findViewById<ImageView>(R.id.Delivered)
+            val avatarImageView = itemView.findViewById<ImageView>(R.id.Avatar)
+            avatarImageView.setImageResource(chat.avatarRes)
+            title.text = chat.title
+            lastMessage.text = chat.lastMessage
+            time.text = chat.time
+            verified.visibility = if (chat.isVerified) View.VISIBLE else View.GONE
+            scam.visibility = if (chat.isScam) View.VISIBLE else View.GONE
+            mute.visibility = if (chat.isMuted) View.VISIBLE else View.GONE
+            if (chat.isOutgoing) {
+                statusIcon.visibility = View.VISIBLE
+                val resId = if (chat.isRead) R.drawable.ic_status_read else R.drawable.ic_status_delivered
+                statusIcon.setImageResource(resId)
+            } else {
+                statusIcon.visibility = View.GONE
+            }
+        }
+    }
+}
+
+class ChatDiffCallback : DiffUtil.ItemCallback<Chat>() {
+    override fun areItemsTheSame(oldItem: Chat, newItem: Chat): Boolean {
+        return oldItem.id == newItem.id
+    }
+
+    override fun areContentsTheSame(oldItem: Chat, newItem: Chat): Boolean {
+        return oldItem == newItem
+    }
+}

app/src/main/java/otus/gpb/recyclerview/ui/DividerItemDecoration.kt

@@ -0,0 +1,38 @@
+import android.content.Context
+import android.graphics.Canvas
+import android.graphics.Rect
+import android.graphics.drawable.Drawable
+import android.view.View
+import androidx.core.content.ContextCompat
+import androidx.recyclerview.widget.RecyclerView
+
+class CustomDividerItemDecoration(context: Context, resId: Int) : RecyclerView.ItemDecoration() {
+    private var divider: Drawable? = ContextCompat.getDrawable(context, resId)
+
+    override fun onDrawOver(c: Canvas, parent: RecyclerView, state: RecyclerView.State) {
+        val left = parent.paddingLeft
+        val right = parent.width - parent.paddingRight
+
+        val childCount = parent.childCount
+        for (i in 0 until childCount - 1) {
+            val child = parent.getChildAt(i)
+            val params = child.layoutParams as RecyclerView.LayoutParams
+            val top = child.bottom + params.bottomMargin
+            val bottom = top + (divider?.intrinsicHeight ?: 0)
+
+            divider?.let {
+                it.setBounds(left, top, right, bottom)
+                it.draw(c)
+            }
+        }
+    }
+
+    override fun getItemOffsets(
+        outRect: Rect,
+        view: View,
+        parent: RecyclerView,
+        state: RecyclerView.State
+    ) {
+        outRect.set(0, 0, 0, divider?.intrinsicHeight ?: 0)
+    }
+}

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

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<inset xmlns:android="http://schemas.android.com/apk/res/android"
+    android:insetLeft="82dp">
+    <shape>
+        <size android:height="0.5dp" />
+        <solid android:color="#D9D9D9" />
+    </shape>
+</inset>

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

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="27dp"
+    android:height="27dp"
+    android:viewportWidth="27"
+    android:viewportHeight="27">
+  <path
+      android:pathData="M24,21.292V7.415C24,7.133 24,6.4 23.661,6.061L19.935,2.338C19.823,2.226 19.461,2 18.919,2H8.081C7.539,2 7.177,2.226 7.065,2.338L3.339,6.061C3,6.4 3,7.133 3,7.415V21.292C3,22.788 4.213,24 5.71,24H21.29C22.787,24 24,22.788 24,21.292ZM18.919,3.692H8.081L6.048,5.723H20.952L18.919,3.692ZM15.532,12.154V13.507H18.455C18.751,13.507 18.899,13.866 18.69,14.075L13.5,19.261L8.31,14.075C8.1,13.866 8.249,13.507 8.545,13.507H11.468V12.154C11.468,11.612 11.919,11.477 12.145,11.477H14.855C15.397,11.477 15.532,11.928 15.532,12.154Z"
+      android:fillColor="#ffffff"
+      android:fillType="evenOdd"/>
+</vector>

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

@@ -0,0 +1,13 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="9dp"
+    android:height="11dp"
+    android:viewportWidth="9"
+    android:viewportHeight="11">
+  <path
+      android:pathData="M0,3.934C0,3.654 0.212,3.427 0.472,3.427H1.283L6.142,8.939V10.291C6.142,10.982 5.67,11.242 5.197,10.735L2.097,7.832H0.472C0.212,7.832 0,7.604 0,7.325V3.934Z"
+      android:fillColor="#BDC1C4"
+      android:fillType="evenOdd"/>
+  <path
+      android:pathData="M0.563,0.002C0.477,0.019 0.397,0.061 0.331,0.124C0.266,0.187 0.218,0.269 0.194,0.359C0.169,0.45 0.169,0.546 0.192,0.637C0.216,0.728 0.263,0.81 0.327,0.874L8.16,9.285C8.202,9.34 8.254,9.385 8.313,9.417C8.372,9.45 8.437,9.468 8.503,9.472C8.569,9.476 8.635,9.464 8.697,9.439C8.759,9.413 8.815,9.374 8.862,9.324C8.909,9.274 8.945,9.213 8.969,9.147C8.992,9.081 9.003,9.01 8.999,8.939C8.996,8.868 8.979,8.798 8.948,8.735C8.918,8.671 8.876,8.616 8.825,8.571L6.942,6.55V1.015C6.942,0.034 6.03,0.044 5.365,0.65L3.222,2.556L0.992,0.16C0.943,0.104 0.883,0.061 0.817,0.034C0.75,0.006 0.679,-0.005 0.608,0.002C0.593,0.001 0.578,0.001 0.563,0.002Z"
+      android:fillColor="#BDC1C4"/>
+</vector>

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

@@ -0,0 +1,17 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="28dp"
+    android:height="28dp"
+    android:viewportWidth="28"
+    android:viewportHeight="28">
+  <path
+      android:pathData="M13.5,25C19.851,25 25,19.851 25,13.5C25,7.149 19.851,2 13.5,2C7.149,2 2,7.149 2,13.5C2,19.851 7.149,25 13.5,25ZM13.5,24C19.299,24 24,19.299 24,13.5C24,7.701 19.299,3 13.5,3C7.701,3 3,7.701 3,13.5C3,19.299 7.701,24 13.5,24Z"
+      android:fillColor="#868686"
+      android:fillType="evenOdd"/>
+  <path
+      android:pathData="M13.528,16.481C13.291,16.235 12.91,16.201 12.633,16.4L9.779,18.451C9.749,18.473 9.721,18.497 9.692,18.521C9.644,18.562 9.589,18.595 9.531,18.619C9.455,18.65 9.374,18.667 9.291,18.667C9.209,18.667 9.128,18.65 9.052,18.619C8.976,18.588 8.908,18.542 8.85,18.484C8.792,18.426 8.746,18.357 8.714,18.281C8.683,18.205 8.667,18.124 8.667,18.042C8.667,17.96 8.683,17.878 8.714,17.803C8.746,17.727 8.792,17.658 8.85,17.6L11.054,14.891C11.278,14.616 11.255,14.214 11,13.966L9.565,12.568C9.291,12.301 9.287,11.858 9.605,11.644C10.217,11.234 11.198,10.821 12.616,10.856C12.814,10.861 13.009,10.79 13.149,10.65L15.25,8.55L15.648,8.152C15.916,7.884 16.35,7.884 16.618,8.152L17.016,8.55L18.783,10.316L19.181,10.714C19.449,10.982 19.449,11.417 19.181,11.685L18.783,12.083L16.703,14.163C16.551,14.315 16.482,14.53 16.5,14.744C16.628,16.25 16.164,17.174 15.718,17.748C15.482,18.052 15.031,18.039 14.765,17.763L13.528,16.481Z"
+      android:fillColor="#868686"/>
+  <path
+      android:pathData="M13.528,16.481C13.291,16.235 12.91,16.201 12.633,16.4L9.779,18.451C9.749,18.473 9.721,18.497 9.692,18.521C9.644,18.562 9.589,18.595 9.531,18.619C9.455,18.65 9.374,18.667 9.291,18.667C9.209,18.667 9.128,18.65 9.052,18.619C8.976,18.588 8.908,18.542 8.85,18.484C8.792,18.426 8.746,18.357 8.714,18.281C8.683,18.205 8.667,18.124 8.667,18.042C8.667,17.96 8.683,17.878 8.714,17.803C8.746,17.727 8.792,17.658 8.85,17.6L11.054,14.891C11.278,14.616 11.255,14.214 11,13.966L9.565,12.568C9.291,12.301 9.287,11.858 9.605,11.644C10.217,11.234 11.198,10.821 12.616,10.856C12.814,10.861 13.009,10.79 13.149,10.65L15.25,8.55L15.648,8.152C15.916,7.884 16.35,7.884 16.618,8.152L17.016,8.55L18.783,10.316L19.181,10.714C19.449,10.982 19.449,11.417 19.181,11.685L18.783,12.083L16.703,14.163C16.551,14.315 16.482,14.53 16.5,14.744C16.628,16.25 16.164,17.174 15.718,17.748C15.482,18.052 15.031,18.039 14.765,17.763L13.528,16.481Z"
+      android:fillColor="#868686"
+      android:fillType="evenOdd"/>
+</vector>