Android-Developer-Basic · IgorAlexeyv · Jan 12, 2025
diff --git a/app/build.gradle b/app/build.gradle
@@ -29,6 +29,9 @@ android {
    kotlinOptions {
        jvmTarget = '1.8'
    }
+    viewBinding {
+        enabled = true
+    }
 }

 dependencies {

diff --git a/app/src/main/java/otus/gpb/homework/viewandresources/CartActivity.kt b/app/src/main/java/otus/gpb/homework/viewandresources/CartActivity.kt
@@ -2,10 +2,117 @@ package otus.gpb.homework.viewandresources

 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import android.widget.TextView
+import android.widget.Toast
+import androidx.core.content.res.ResourcesCompat
+import androidx.recyclerview.widget.DividerItemDecoration
+import androidx.recyclerview.widget.ItemTouchHelper
+import androidx.recyclerview.widget.RecyclerView
+
+class CartActivity : AppCompatActivity(), CartItemListener {
+    private lateinit var list :MutableList<CartItem>
+    private lateinit var adapter :CartItemAdapter
+    private val list_generate_size = 40
+    private var num = 1
+
+    private lateinit var recyclerView :RecyclerView
+    private lateinit var textCartItemCount :TextView
+    private lateinit var textCartOrderTotalAmount :TextView
+    private lateinit var textCartSubtotalAmount :TextView
+    private lateinit var textCartShippingAmount :TextView
+    private lateinit var textCartTaxAmount :TextView
+    private lateinit var textCartOrderTotal :TextView
+    private lateinit var textCartSubtotal :TextView
+    private lateinit var textCartShipping :TextView
+    private lateinit var textCartTax :TextView

-class CartActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_cart)
+
+        recyclerView = findViewById<RecyclerView>(R.id.recyclerView)
+        textCartOrderTotal = findViewById<TextView>(R.id.textCartOrderTotal)
+        textCartSubtotal = findViewById<TextView>(R.id.textCartSubtotal)
+        textCartShipping = findViewById<TextView>(R.id.textCartShipping)
+        textCartTax = findViewById<TextView>(R.id.textCartTax)
+        textCartItemCount = findViewById<TextView>(R.id.textCartItemCount)
+        textCartOrderTotalAmount = findViewById<TextView>(R.id.textCartOrderTotalAmount)
+        textCartSubtotalAmount = findViewById<TextView>(R.id.textCartSubtotalAmount)
+        textCartShippingAmount = findViewById<TextView>(R.id.textCartShippingAmount)
+        textCartTaxAmount = findViewById<TextView>(R.id.textCartTaxAmount)
+
+        adapter = CartItemAdapter(this)
+        list = generateList()
+
+        recyclerView.addItemDecoration(
+            DividerItemDecoration(this, DividerItemDecoration.VERTICAL)
+        )
+        ItemTouchHelper(CartItemItemTouchCallbacks(this)).attachToRecyclerView(recyclerView)
+        recyclerView.adapter = adapter
+        adapter.setItems(this.list)
+
+        textCartOrderTotal.text = getString(R.string.order_total)
+        textCartSubtotal.text = getString(R.string.subtotal)
+        textCartShipping.text = getString(R.string.shipping)
+        textCartTax.text = getString(R.string.tax)
+    }
+
+    // Клик на товаре в корзине.
+    override fun onItemClick(item: CartItem) {
+        Toast.makeText(this, item.caption + "\n" + item.description, Toast.LENGTH_SHORT).show()
+    }
+
+    // Удаляет товар из корзины
+    override fun onItemSwiped(item: CartItem) {
+        val index = list.indexOf(item)
+        list.removeAt(index)
+        recyclerView.post { adapter.notifyItemRemoved(index) }
+    }
+
+    // Подгружает 40 новых товаров в корзину
+    override fun onLoadMoreItem() {
+        val position = list.size - 1
+        val newList = generateList()
+        list+= newList
+        recyclerView.post { adapter.notifyItemRangeInserted(position, newList.size) }
+    }
+
+    private fun generateList(): MutableList<CartItem> {
+        var totalAmount = 0
+        data class Item(val resId: Int, val name: String)
+        val items = listOf(
+            Item(R.drawable.im_goods, getString(R.string.subtotal)),
+            Item(R.drawable.im_sport, getString(R.string.sport)),
+            Item(R.drawable.im_groceries, getString(R.string.groceries)),
+            Item(R.drawable.im_food, getString(R.string.food))
+        )
+
+        val list = mutableListOf<CartItem>()
+        repeat(list_generate_size) {
+            val amount = (1..1000000).random()
+            totalAmount += amount
+            val i = (0..3).random()
+            val item = CartItem(
+                items[i].name,
+                getString(R.string.category) +" ${num++}",
+                formatAmount(amount),
+                getString(R.string.discription),
+                ResourcesCompat.getDrawable(getResources(), items[i].resId,null))
+            list.add(item)
+        }
+
+        textCartItemCount.text = "${num-1}" + getString(R.string.items_in_cart)
+        textCartOrderTotalAmount.text = formatAmount(totalAmount)
+        textCartSubtotalAmount.text = formatAmount((totalAmount.toFloat() * 0.85).toInt())
+        textCartShippingAmount.text = formatAmount((totalAmount.toFloat() * 0.20).toInt())
+        textCartTaxAmount.text = formatAmount((totalAmount.toFloat() * 0.1).toInt())
+
+        return list
+    }
+
+    private fun formatAmount(amount :Int) :String {
+        val first = amount / 100
+        val second  = amount % 100
+        return String.format("$%d.%02d", first, second)
    }
 }
diff --git a/app/src/main/java/otus/gpb/homework/viewandresources/CartItem.kt b/app/src/main/java/otus/gpb/homework/viewandresources/CartItem.kt
@@ -0,0 +1,11 @@
+package otus.gpb.homework.viewandresources
+
+import android.graphics.drawable.Drawable
+
+data class CartItem (
+    val caption: String,
+    val category: String,
+    val price: String,
+    val description: String,
+    val image: Drawable? = null,
+    )
diff --git a/app/src/main/java/otus/gpb/homework/viewandresources/CartItemAdapter.kt b/app/src/main/java/otus/gpb/homework/viewandresources/CartItemAdapter.kt
@@ -0,0 +1,31 @@
+package otus.gpb.homework.viewandresources
+
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.recyclerview.widget.RecyclerView
+
+class CartItemAdapter(private val listener: CartItemListener) : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
+
+    private lateinit var list: MutableList<CartItem>
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
+        val view = LayoutInflater.from(parent.context).inflate(R.layout.cart_item, parent, false)
+        return CartItemViewHolder(view, listener)
+    }
+
+    override fun getItemCount(): Int = list.size
+
+    override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
+        val item = list[position]
+        (holder as CartItemViewHolder).bind(item)
+
+        if(position == list.size - 1) {
+            listener.onLoadMoreItem()
+        }
+    }
+
+    fun setItems(items: MutableList<CartItem>) {
+        list = items
+        notifyItemInserted(0)
+    }
+}
diff --git a/app/src/main/java/otus/gpb/homework/viewandresources/CartItemListener.kt b/app/src/main/java/otus/gpb/homework/viewandresources/CartItemListener.kt
@@ -0,0 +1,7 @@
+package otus.gpb.homework.viewandresources
+
+interface CartItemListener {
+    fun onItemClick(item: CartItem)
+    fun onItemSwiped(item: CartItem)
+    fun onLoadMoreItem()
+}
diff --git a/app/src/main/java/otus/gpb/homework/viewandresources/CartItemTouchHelper.kt b/app/src/main/java/otus/gpb/homework/viewandresources/CartItemTouchHelper.kt
@@ -0,0 +1,78 @@
+package otus.gpb.homework.viewandresources
+
+import android.content.Context
+import android.graphics.Bitmap
+import android.graphics.Canvas
+import android.graphics.Paint
+import android.graphics.Rect
+import androidx.core.content.res.ResourcesCompat
+import androidx.core.graphics.drawable.toBitmap
+import androidx.recyclerview.widget.ItemTouchHelper
+import androidx.recyclerview.widget.RecyclerView
+
+class CartItemItemTouchCallbacks(context : Context) : ItemTouchHelper.Callback(){
+
+    private val ic_trash = ResourcesCompat.getDrawable(context.getResources(), R.drawable.ic_trash,null)
+    private val paint =  Paint().apply { setARGB(0xFF, 0xA0,0xA0,0xFF) }
+    private val rect = Rect()
+    private lateinit var bitmap :Bitmap
+    private var ic_trash_size :Int = 0
+    private var once = false
+
+    override fun getMovementFlags(
+        recyclerView: RecyclerView,
+        viewHolder: RecyclerView.ViewHolder
+    ): Int {
+        return makeMovementFlags(0, ItemTouchHelper.LEFT)
+    }
+
+    override fun onChildDraw(
+        c: Canvas,
+        recyclerView: RecyclerView,
+        viewHolder: RecyclerView.ViewHolder,
+        dX: Float,
+        dY: Float,
+        actionState: Int,
+        isCurrentlyActive: Boolean
+    ) {
+        super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive)
+
+        // При Swipe влево освободившееся место заполнить голубым фоном с иконкой архивирования
+        if( isCurrentlyActive && actionState == ItemTouchHelper.ACTION_STATE_SWIPE) {
+
+            rect.set(viewHolder.itemView.width + dX.toInt(),
+                viewHolder.itemView.y.toInt(),
+                viewHolder.itemView.width + viewHolder.itemView.paddingRight,
+                viewHolder.itemView.y.toInt() + viewHolder.itemView.height)
+
+            c.drawRect(rect, paint)
+
+            if( ic_trash!= null ) {
+                if( !once ){
+                    once = true
+                    ic_trash_size = viewHolder.itemView.height / 2
+                    bitmap = ic_trash.toBitmap(ic_trash_size, ic_trash_size)
+                }
+
+                c.drawBitmap(
+                        bitmap,
+                        (viewHolder.itemView.width - ic_trash_size - ic_trash_size / 2).toFloat(),
+                        viewHolder.itemView.y + ic_trash_size / 2,
+                        null
+                    )
+            }
+        }
+    }
+
+    override fun onMove(
+        recyclerView: RecyclerView,
+        viewHolder: RecyclerView.ViewHolder,
+        target: RecyclerView.ViewHolder
+    ): Boolean {
+        TODO("Not yet implemented")
+    }
+
+    override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {
+        (viewHolder as CartItemViewHolder).listener.onItemSwiped(viewHolder.item)
+    }
+}
diff --git a/app/src/main/java/otus/gpb/homework/viewandresources/CartItemViewHolder.kt b/app/src/main/java/otus/gpb/homework/viewandresources/CartItemViewHolder.kt
@@ -0,0 +1,32 @@
+package otus.gpb.homework.viewandresources
+
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ImageView
+import android.widget.TextView
+import androidx.recyclerview.widget.RecyclerView
+
+class CartItemViewHolder(
+    private val view: View,
+    val listener: CartItemListener
+) : RecyclerView.ViewHolder(view) {
+
+    private var root = view.findViewById<ViewGroup>(R.id.cart_item_container)
+    private var image = view.findViewById<ImageView>(R.id.cart_item_image)
+    private var price = view.findViewById<TextView>(R.id.cart_item_price)
+    private var caption = view.findViewById<TextView>(R.id.cart_item_caption)
+    private var category = view.findViewById<TextView>(R.id.cart_item_category)
+    private var description = view.findViewById<TextView>(R.id.cart_item_description)
+
+    lateinit var item :CartItem
+
+    fun bind(item: CartItem){
+        root.setOnClickListener { listener.onItemClick(item) }
+        item.image?.let{ image.setImageDrawable(it) }
+        price.text = item.price
+        caption.text = item.caption
+        category.text = item.category
+        description.text = item.description
+        this.item = item
+    }
+}
diff --git a/app/src/main/java/otus/gpb/homework/viewandresources/MainActivity.kt b/app/src/main/java/otus/gpb/homework/viewandresources/MainActivity.kt
@@ -4,6 +4,7 @@ import android.content.Intent
 import android.os.Bundle
 import android.widget.Button
 import androidx.appcompat.app.AppCompatActivity
+import androidx.core.content.res.ResourcesCompat
 import com.google.android.material.dialog.MaterialAlertDialogBuilder

 class MainActivity : AppCompatActivity() {
@@ -21,6 +22,7 @@ class MainActivity : AppCompatActivity() {
        findViewById<Button>(R.id.signin_button).setOnClickListener {
            MaterialAlertDialogBuilder(this)
                .setView(R.layout.dialog_signin)
+                .setBackground(ResourcesCompat.getDrawable(getResources(), R.drawable.shape_round_corners,null))
                .show()
        }
    }

diff --git a/app/src/main/java/otus/gpb/homework/viewandresources/components/CompoundViewContacts.kt b/app/src/main/java/otus/gpb/homework/viewandresources/components/CompoundViewContacts.kt
@@ -0,0 +1,39 @@
+package otus.gpb.homework.viewandresources.components
+
+import android.content.Context
+import android.content.res.ColorStateList
+import android.util.AttributeSet
+import android.view.LayoutInflater
+import androidx.constraintlayout.widget.ConstraintLayout
+import androidx.core.content.withStyledAttributes
+import otus.gpb.homework.viewandresources.R
+import otus.gpb.homework.viewandresources.databinding.CompoundViewContactsBinding
+
+
+class CompoundViewContacts @JvmOverloads constructor(
+    context: Context,
+    attrs: AttributeSet? = null,
+    defStileAttr: Int = 0
+) : ConstraintLayout(context, attrs, defStileAttr) {
+
+    private val binding: CompoundViewContactsBinding
+
+    init {
+        binding = CompoundViewContactsBinding.inflate(LayoutInflater.from(context), this)
+        initCustomAttibutes(attrs, defStileAttr)
+    }
+
+    private fun initCustomAttibutes(attrs: AttributeSet?, defStyleAttr: Int) = with(binding) {
+        context.withStyledAttributes(attrs, R.styleable.CompoundViewContacts, defStyleAttr, 0) {
+            title.text = getString(R.styleable.CompoundViewContacts_contacts_title)
+            title.setTextColor(getColor(R.styleable.CompoundViewContacts_contacts_titleColor, 0))
+            text.text = getString(R.styleable.CompoundViewContacts_contacts_text)
+            text.setTextColor(getColor(R.styleable.CompoundViewContacts_contacts_textColor, 0))
+            binding.icon.setImageDrawable(getDrawable(R.styleable.CompoundViewContacts_contacts_icon))
+            binding.icon.setImageTintList(
+                ColorStateList.valueOf(
+                    getColor(R.styleable.CompoundViewContacts_contacts_iconColor, 0)))
+            binding.divider.dividerColor = (getColor(R.styleable.CompoundViewContacts_contacts_dividerColor, 0))
+        }
+    }
+}
diff --git a/app/src/main/res/drawable/ic_address.xml b/app/src/main/res/drawable/ic_address.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="14dp"
+    android:height="18dp"
+    android:viewportWidth="14"
+    android:viewportHeight="18">
+  <path
+      android:pathData="M0,18V2C0,1.45 0.196,0.979 0.587,0.587C0.979,0.196 1.45,0 2,0H12C12.55,0 13.021,0.196 13.413,0.587C13.804,0.979 14,1.45 14,2V18L7,15L0,18ZM2,14.95L7,12.8L12,14.95V2H2V14.95Z"
+      android:fillColor="#43474E"/>
+</vector>
diff --git a/app/src/main/res/drawable/ic_arrow_back.xml b/app/src/main/res/drawable/ic_arrow_back.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="16dp"
+    android:height="16dp"
+    android:viewportWidth="16"
+    android:viewportHeight="16">
+  <path
+      android:pathData="M3.825,9L9.425,14.6L8,16L0,8L8,0L9.425,1.4L3.825,7H16V9H3.825Z"
+      android:fillColor="#43474E"/>
+</vector>
diff --git a/app/src/main/res/drawable/ic_attach.xml b/app/src/main/res/drawable/ic_attach.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="11dp"
+    android:height="20dp"
+    android:viewportWidth="11"
+    android:viewportHeight="20">
+  <path
+      android:pathData="M5.5,20C3.967,20 2.667,19.467 1.6,18.4C0.533,17.333 0,16.033 0,14.5V4C0,2.9 0.392,1.958 1.175,1.175C1.958,0.392 2.9,0 4,0C5.1,0 6.042,0.392 6.825,1.175C7.608,1.958 8,2.9 8,4V13.5C8,14.2 7.758,14.792 7.275,15.275C6.792,15.758 6.2,16 5.5,16C4.8,16 4.208,15.758 3.725,15.275C3.242,14.792 3,14.2 3,13.5V4H4.5V13.5C4.5,13.783 4.596,14.021 4.787,14.212C4.979,14.404 5.217,14.5 5.5,14.5C5.783,14.5 6.021,14.404 6.213,14.212C6.404,14.021 6.5,13.783 6.5,13.5V4C6.5,3.3 6.258,2.708 5.775,2.225C5.292,1.742 4.7,1.5 4,1.5C3.3,1.5 2.708,1.742 2.225,2.225C1.742,2.708 1.5,3.3 1.5,4V14.5C1.5,15.6 1.892,16.542 2.675,17.325C3.458,18.108 4.4,18.5 5.5,18.5C6.6,18.5 7.542,18.108 8.325,17.325C9.108,16.542 9.5,15.6 9.5,14.5V4H11V14.5C11,16.033 10.467,17.333 9.4,18.4C8.333,19.467 7.033,20 5.5,20Z"
+      android:fillColor="@color/on_surface_variant"/>
+</vector>
diff --git a/app/src/main/res/drawable/ic_cancel.xml b/app/src/main/res/drawable/ic_cancel.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="20dp"
+    android:height="20dp"
+    android:viewportWidth="20"
+    android:viewportHeight="20">
+  <path
+      android:pathData="M6.4,15L10,11.4L13.6,15L15,13.6L11.4,10L15,6.4L13.6,5L10,8.6L6.4,5L5,6.4L8.6,10L5,13.6L6.4,15ZM10,20C8.617,20 7.317,19.737 6.1,19.212C4.883,18.688 3.825,17.975 2.925,17.075C2.025,16.175 1.313,15.117 0.788,13.9C0.262,12.683 0,11.383 0,10C0,8.617 0.262,7.317 0.788,6.1C1.313,4.883 2.025,3.825 2.925,2.925C3.825,2.025 4.883,1.313 6.1,0.788C7.317,0.262 8.617,0 10,0C11.383,0 12.683,0.262 13.9,0.788C15.117,1.313 16.175,2.025 17.075,2.925C17.975,3.825 18.688,4.883 19.212,6.1C19.737,7.317 20,8.617 20,10C20,11.383 19.737,12.683 19.212,13.9C18.688,15.117 17.975,16.175 17.075,17.075C16.175,17.975 15.117,18.688 13.9,19.212C12.683,19.737 11.383,20 10,20ZM10,18C12.233,18 14.125,17.225 15.675,15.675C17.225,14.125 18,12.233 18,10C18,7.767 17.225,5.875 15.675,4.325C14.125,2.775 12.233,2 10,2C7.767,2 5.875,2.775 4.325,4.325C2.775,5.875 2,7.767 2,10C2,12.233 2.775,14.125 4.325,15.675C5.875,17.225 7.767,18 10,18Z"
+      android:fillColor="@color/on_surface_variant"/>
+</vector>