Use @parcelize for parcelables

Author: MarkNjunge

app/build.gradle

@@ -26,6 +26,10 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
+    // Required for @Parcelize
+    androidExtensions {
+        experimental = true
+    }
 }
 
 dependencies {

app/src/main/java/com/marknkamau/justjava/data/models/CartItem.kt

@@ -2,11 +2,12 @@ package com.marknkamau.justjava.data.models
 
 import androidx.room.Entity
 import androidx.room.PrimaryKey
-import android.os.Parcel
 import android.os.Parcelable
 import com.marknjunge.core.model.OrderItem
+import kotlinx.android.parcel.Parcelize
 
 @Entity(tableName = "cart")
+@Parcelize
 data class CartItem(@PrimaryKey(autoGenerate = true) val id: Int,
                     var itemName: String,
                     var itemQty: Int,
@@ -15,37 +16,7 @@ data class CartItem(@PrimaryKey(autoGenerate = true) val id: Int,
                     var itemMarshmallow: Boolean,
                     var itemPrice: Int) : Parcelable {
 
-    constructor(source: Parcel) : this(
-            source.readInt(),
-            source.readString(),
-            source.readInt(),
-            1 == source.readInt(),
-            1 == source.readInt(),
-            1 == source.readInt(),
-            source.readInt()
-    )
-
-    override fun describeContents() = 0
-
-    override fun writeToParcel(dest: Parcel, flags: Int) = with(dest) {
-        writeInt(id)
-        writeString(itemName)
-        writeInt(itemQty)
-        writeInt((if (itemCinnamon) 1 else 0))
-        writeInt((if (itemChoc) 1 else 0))
-        writeInt((if (itemMarshmallow) 1 else 0))
-        writeInt(itemPrice)
-    }
-
-    companion object {
-        @JvmField
-        val CREATOR: Parcelable.Creator<CartItem> = object : Parcelable.Creator<CartItem> {
-            override fun createFromParcel(source: Parcel): CartItem = CartItem(source)
-            override fun newArray(size: Int): Array<CartItem?> = arrayOfNulls(size)
-        }
+    fun toOrderItem(): OrderItem {
+        return OrderItem(this.id, this.itemName, this.itemQty, this.itemCinnamon, this.itemChoc, this.itemMarshmallow, this.itemPrice)
     }
 }
-
-fun CartItem.toOrderItem(): OrderItem {
-    return OrderItem(this.id, this.itemName, this.itemQty, this.itemCinnamon, this.itemChoc, this.itemMarshmallow, this.itemPrice)
-}

app/src/main/java/com/marknkamau/justjava/ui/checkout/CheckoutPresenter.kt

@@ -8,7 +8,6 @@ import com.marknkamau.justjava.data.local.PreferencesRepository
 import com.marknjunge.core.model.OrderItem
 import com.marknjunge.core.model.Order
 import com.marknkamau.justjava.data.models.CartItem
-import com.marknkamau.justjava.data.models.toOrderItem
 import com.marknkamau.justjava.ui.BasePresenter
 import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.launch

core/build.gradle

@@ -1,6 +1,7 @@
 apply plugin: 'com.android.library'
 apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-kapt'
+apply plugin: 'kotlin-android-extensions'
 
 // A properties file is located at projectFolder/keys.properties
 def keysPropertiesFile = rootProject.file("keys.properties")
@@ -30,6 +31,10 @@ android {
         }
     }
 
+    // Required for @Parcelize
+    androidExtensions {
+        experimental = true
+    }
 }
 
 dependencies {

core/src/main/java/com/marknjunge/core/model/CoffeeDrink.kt

@@ -1,40 +1,13 @@
 package com.marknjunge.core.model
 
-import android.os.Parcel
 import android.os.Parcelable
+import kotlinx.android.parcel.Parcelize
 
-open class CoffeeDrink(var drinkID: String = "",
+@Parcelize
+data class CoffeeDrink(var drinkID: String = "",
                        var drinkName: String = "",
                        var drinkContents: String = "",
                        var drinkDescription: String = "",
                        var drinkPrice: String = "",
-                       var drinkImage: String = "")
-    : Parcelable {
-
-    constructor(source: Parcel) : this(
-            source.readString(),
-            source.readString(),
-            source.readString(),
-            source.readString(),
-            source.readString(),
-            source.readString()
-    )
-
-    override fun describeContents() = 0
-
-    override fun writeToParcel(dest: Parcel, flags: Int) = with(dest) {
-        writeString(drinkID)
-        writeString(drinkName)
-        writeString(drinkContents)
-        writeString(drinkDescription)
-        writeString(drinkPrice)
-        writeString(drinkImage)
-    }
-
-    companion object {
-        @JvmField val CREATOR: Parcelable.Creator<CoffeeDrink> = object : Parcelable.Creator<CoffeeDrink> {
-            override fun createFromParcel(source: Parcel): CoffeeDrink = CoffeeDrink(source)
-            override fun newArray(size: Int): Array<CoffeeDrink?> = arrayOfNulls(size)
-        }
-    }
-}
+                       var drinkImage: String = ""
+) : Parcelable

core/src/main/java/com/marknjunge/core/model/Order.kt

@@ -1,9 +1,10 @@
 package com.marknjunge.core.model
 
-import android.os.Parcel
 import android.os.Parcelable
+import kotlinx.android.parcel.Parcelize
 import java.util.*
 
+@Parcelize
 data class Order(val orderId: String,
                  val customerId: String,
                  var itemsCount: Int,
@@ -13,40 +14,4 @@ data class Order(val orderId: String,
                  val status: OrderStatus = OrderStatus.PENDING,
                  val date: Date = Date(),
                  val paymentMethod: String,
-                 val paymentStatus: String = "unpaid") : Parcelable {
-    constructor(source: Parcel) : this(
-            source.readString(),
-            source.readString(),
-            source.readInt(),
-            source.readInt(),
-            source.readString(),
-            source.readString(),
-            OrderStatus.values()[source.readInt()],
-            source.readSerializable() as Date,
-            source.readString(),
-            source.readString()
-    )
-
-    override fun describeContents() = 0
-
-    override fun writeToParcel(dest: Parcel, flags: Int) = with(dest) {
-        writeString(orderId)
-        writeString(customerId)
-        writeInt(itemsCount)
-        writeInt(totalPrice)
-        writeString(deliveryAddress)
-        writeString(additionalComments)
-        writeInt(status.ordinal)
-        writeSerializable(date)
-        writeString(paymentMethod)
-        writeString(paymentStatus)
-    }
-
-    companion object {
-        @JvmField
-        val CREATOR: Parcelable.Creator<Order> = object : Parcelable.Creator<Order> {
-            override fun createFromParcel(source: Parcel): Order = Order(source)
-            override fun newArray(size: Int): Array<Order?> = arrayOfNulls(size)
-        }
-    }
-}
+                 val paymentStatus: String = "unpaid") : Parcelable