Initial commit

app/.gitignore

@@ -0,0 +1 @@
+/build

app/build.gradle

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+apply plugin: 'com.android.application'
+
+apply plugin: 'kotlin-android'
+
+apply plugin: 'kotlin-android-extensions'
+
+apply plugin: 'kotlin-kapt'
+
+android {
+    compileSdkVersion 28
+    defaultConfig {
+        applicationId "com.example.h_mal.shopapicasestudy"
+        minSdkVersion 19
+        targetSdkVersion 28
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    dataBinding {
+        enabled = true
+    }
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation 'androidx.appcompat:appcompat:1.1.0'
+    implementation 'androidx.core:core-ktx:1.1.0'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    implementation "androidx.lifecycle:lifecycle-extensions:2.1.0"
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'androidx.test:runner:1.2.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+    implementation "androidx.room:room-runtime:2.2.0-rc01"
+    implementation "androidx.room:room-ktx:2.2.0-rc01"
+    kapt "androidx.room:room-compiler:2.2.0-rc01"
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/androidTest/java/com/example/h_mal/shopapicasestudy/ExampleInstrumentedTest.kt

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+package com.example.h_mal.shopapicasestudy
+
+import androidx.test.InstrumentationRegistry
+import androidx.test.runner.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getTargetContext()
+        assertEquals("com.example.h_mal.shopapicasestudy", appContext.packageName)
+    }
+}

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:tools="http://schemas.android.com/tools"
+        package="com.example.h_mal.shopapicasestudy">
+
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.INTERNET" />
+
+    <application
+            android:name=".ApiApplication"
+            android:allowBackup="true"
+            android:icon="@mipmap/ic_launcher"
+            android:label="@string/app_name"
+            android:roundIcon="@mipmap/ic_launcher_round"
+            android:supportsRtl="true"
+            android:theme="@style/AppTheme"
+            tools:ignore="AllowBackup,GoogleAppIndexingWarning">
+        <activity android:name=".ui.CartActivity"></activity>
+        <activity android:name=".ui.WishListActivity" />
+        <activity android:name=".ui.MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/com/example/h_mal/shopapicasestudy/ApiApplication.kt

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+package com.example.h_mal.shopapicasestudy
+
+import android.app.Application
+import com.example.h_mal.shopapicasestudy.db.AppDatabase
+
+class ApiApplication : Application() {
+
+    companion object{
+        var db: AppDatabase? = null
+    }
+
+    override fun onCreate() {
+        super.onCreate()
+
+        db = AppDatabase.invoke(this)
+    }
+}

app/src/main/java/com/example/h_mal/shopapicasestudy/adapters/CartlistAdapter.kt

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+package com.example.h_mal.shopapicasestudy.adapters
+
+import android.app.AlertDialog
+import android.content.Context
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ArrayAdapter
+import android.widget.Toast
+import androidx.databinding.DataBindingUtil
+import com.example.h_mal.shopapicasestudy.R
+import com.example.h_mal.shopapicasestudy.databinding.CartItemLayoutBinding
+import com.example.h_mal.shopapicasestudy.databinding.ListItemLayoutBinding
+import com.example.h_mal.shopapicasestudy.databinding.WishlistItemLayoutBinding
+import com.example.h_mal.shopapicasestudy.db.entities.CartItemEntity
+import com.example.h_mal.shopapicasestudy.db.entities.ShopItemEntity
+import com.example.h_mal.shopapicasestudy.ui.WishListActivity.Companion.wishResponseListener
+import com.example.h_mal.shopapicasestudy.viewmodels.CartViewModel
+import com.example.h_mal.shopapicasestudy.viewmodels.ListViewModel
+import com.example.h_mal.shopapicasestudy.viewmodels.WishListViewModel
+import kotlinx.android.synthetic.main.list_item_layout.view.*
+
+class CartlistAdapter(context: Context, objects: MutableList<CartItemEntity>) :
+    ArrayAdapter<CartItemEntity>(context, 0, objects) {
+
+    var cartBinding: CartItemLayoutBinding? = null
+
+    override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
+        var view: View? = convertView
+
+        if (view == null){
+            view = LayoutInflater.from(context).inflate(R.layout.cart_item_layout, null)!!
+            cartBinding = DataBindingUtil.bind(view)
+            view.tag = cartBinding
+
+        }else{
+            cartBinding = view.getTag() as CartItemLayoutBinding?
+        }
+
+        val i = getItem(position)
+
+        val vm = CartViewModel(i)
+
+        cartBinding?.viewmodel = vm
+
+        view.setOnClickListener {
+            showDialog(vm,position)
+        }
+
+        return view
+    }
+
+    fun showDialog(vm : CartViewModel, position: Int){
+        val builder = AlertDialog.Builder(context)
+        builder.setTitle("Select Action")
+
+        // Display a message on alert dialog
+        builder.setMessage("Do you want to delete?")
+
+        builder.setPositiveButton("Delete"){dialog, which ->
+            dialog.dismiss()
+
+            val item = getItem(position)
+
+            val s = vm.deleteItemFromCart(item)
+
+            if (!s.isEmpty()){
+                Toast.makeText(context,"Item Successfully added to Cart",Toast.LENGTH_SHORT).show()
+            }else{
+                Toast.makeText(context,"Failed to add Item to Wishlist",Toast.LENGTH_SHORT).show()
+            }
+
+        }
+
+
+        builder.setNegativeButton("Cancel"){dialog,which ->
+            dialog.dismiss()
+        }
+
+        val dialog: AlertDialog = builder.create()
+
+        dialog.show()
+    }
+}

app/src/main/java/com/example/h_mal/shopapicasestudy/adapters/ListViewAdapter.kt

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+package com.example.h_mal.shopapicasestudy.adapters
+
+import android.app.AlertDialog
+import android.content.Context
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ArrayAdapter
+import android.widget.Toast
+import androidx.databinding.DataBindingUtil
+import androidx.lifecycle.ViewModel
+import com.example.h_mal.shopapicasestudy.R
+import com.example.h_mal.shopapicasestudy.databinding.ListItemLayoutBinding
+import com.example.h_mal.shopapicasestudy.models.ShopItem
+import com.example.h_mal.shopapicasestudy.ui.MainActivity
+import com.example.h_mal.shopapicasestudy.ui.MainActivity.Companion.responseListener
+import com.example.h_mal.shopapicasestudy.ui.ResponseListener
+import com.example.h_mal.shopapicasestudy.viewmodels.ListViewModel
+import kotlinx.android.synthetic.main.list_item_layout.view.*
+
+class ListViewAdapter(context: Context,  objects: MutableList<ShopItem>) :
+    ArrayAdapter<ShopItem>(context, 0, objects) {
+
+    private var listViewBinding: ListItemLayoutBinding? = null
+
+    override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
+        var view: View? = convertView
+
+        if (view == null){
+            view = LayoutInflater.from(context).inflate(R.layout.list_item_layout, null)!!
+            listViewBinding = DataBindingUtil.bind(view)
+            view.setTag(listViewBinding)
+        }else{
+            listViewBinding = view.getTag() as ListItemLayoutBinding
+        }
+
+        val s = getItem(position)
+        val vm = ListViewModel(s)
+
+        listViewBinding?.viewmodel = vm
+
+        view.setOnClickListener {
+            //produce a dialog
+            showDialog(vm,position)
+
+        }
+
+
+        return view
+    }
+
+    fun showDialog(vm : ListViewModel, position: Int){
+        val builder = AlertDialog.Builder(context)
+        builder.setTitle("Select Action")
+
+        // Display a message on alert dialog
+        builder.setMessage("Do you want to add to Cart or Wishlist?")
+
+        builder.setPositiveButton("WishList"){dialog, which ->
+            dialog.dismiss()
+
+            val i = getItem(position)
+
+            val id = vm.insertWishListItem(i)
+
+            if (id > 0){
+                Toast.makeText(context,"Item Successfully added to Wishlist",Toast.LENGTH_SHORT).show()
+            }else{
+                Toast.makeText(context,"Failed to add Item to Wishlist",Toast.LENGTH_SHORT).show()
+            }
+
+        }
+
+
+        builder.setNegativeButton("Cart"){dialog,which ->
+            dialog.dismiss()
+
+            val stock = getItem(position).stock?.toInt()
+
+            if (stock == 0){
+                Toast.makeText(context,"Item out of stock",Toast.LENGTH_SHORT).show()
+                return@setNegativeButton
+            }
+
+            val i = getItem(position).createCartItem()
+
+            val id = vm.insertCartListItem(i, responseListener)
+
+            if (!id.isEmpty()){
+                Toast.makeText(context,"Item Successfully added to Cart",Toast.LENGTH_SHORT).show()
+            }else{
+                Toast.makeText(context,"Failed to add Item to Cart",Toast.LENGTH_SHORT).show()
+            }
+        }
+
+        val dialog: AlertDialog = builder.create()
+
+        dialog.show()
+    }
+}

app/src/main/java/com/example/h_mal/shopapicasestudy/adapters/WishlistAdapter.kt

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+package com.example.h_mal.shopapicasestudy.adapters
+
+import android.app.AlertDialog
+import android.content.Context
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ArrayAdapter
+import android.widget.Toast
+import androidx.databinding.DataBindingUtil
+import com.example.h_mal.shopapicasestudy.R
+import com.example.h_mal.shopapicasestudy.databinding.ListItemLayoutBinding
+import com.example.h_mal.shopapicasestudy.databinding.WishlistItemLayoutBinding
+import com.example.h_mal.shopapicasestudy.db.entities.ShopItemEntity
+import com.example.h_mal.shopapicasestudy.ui.WishListActivity.Companion.wishResponseListener
+import com.example.h_mal.shopapicasestudy.viewmodels.ListViewModel
+import com.example.h_mal.shopapicasestudy.viewmodels.WishListViewModel
+import kotlinx.android.synthetic.main.list_item_layout.view.*
+
+class WishlistAdapter(context: Context, objects: MutableList<ShopItemEntity>) :
+    ArrayAdapter<ShopItemEntity>(context, 0, objects) {
+
+    var wishlistItemLayoutBinding : WishlistItemLayoutBinding? = null
+
+    override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
+        var view: View? = convertView
+
+        if (view == null){
+            view = LayoutInflater.from(context).inflate(R.layout.wishlist_item_layout, null)!!
+            wishlistItemLayoutBinding = DataBindingUtil.bind(view)
+            view.tag = wishlistItemLayoutBinding
+        }else{
+            wishlistItemLayoutBinding = view.tag as WishlistItemLayoutBinding
+        }
+
+        val item = getItem(position)
+        val vm = WishListViewModel(item)
+
+        wishlistItemLayoutBinding?.viewmodel = vm
+
+        view.setOnClickListener {
+            showDialog(vm,position)
+        }
+
+        return view
+    }
+
+    fun showDialog(vm : WishListViewModel, position: Int){
+        val builder = AlertDialog.Builder(context)
+        builder.setTitle("Select Action")
+
+        // Display a message on alert dialog
+        builder.setMessage("Do you want to add to Cart or Delete?")
+
+        builder.setPositiveButton("Cart"){dialog, which ->
+            dialog.dismiss()
+
+            val stock = getItem(position).stock
+
+            if (stock == 0){
+                Toast.makeText(context,"Item out of stock",Toast.LENGTH_SHORT).show()
+                return@setPositiveButton
+            }
+
+            val i = getItem(position)
+
+            val id = vm.insertCartListItem(i)
+
+            if (!id.isEmpty()){
+                Toast.makeText(context,"Item Successfully added to Cart",Toast.LENGTH_SHORT).show()
+            }else{
+                Toast.makeText(context,"Failed to add Item to Cart",Toast.LENGTH_SHORT).show()
+            }
+
+        }
+
+
+        builder.setNegativeButton("Delete"){dialog,which ->
+            dialog.dismiss()
+
+            val item = getItem(position)
+
+            val i = vm.deleteFromWishList(item)
+
+            if (i > 0){
+                Toast.makeText(context,"Item Successfully removed from Wishlist", Toast.LENGTH_SHORT).show()
+            }else{
+                Toast.makeText(context,"Failed to remove Item from Wishlist", Toast.LENGTH_SHORT).show()
+            }
+        }
+
+        val dialog: AlertDialog = builder.create()
+
+        dialog.show()
+    }
+}

app/src/main/java/com/example/h_mal/shopapicasestudy/api/Api.kt

@@ -0,0 +1,49 @@
+package com.example.h_mal.shopapicasestudy.api
+
+import android.util.Log
+import androidx.lifecycle.MutableLiveData
+import com.example.h_mal.shopapicasestudy.models.ShopItem
+import org.json.JSONArray
+
+class Api {
+
+    fun parseJson(jsonString : String) : MutableList<ShopItem>{
+
+
+
+        val list = mutableListOf<ShopItem>()
+
+        try {
+            val json = JSONArray(jsonString)
+
+            for (i in 0 until json.length()){
+                val item = json.getJSONObject(i)
+
+                val id = item.get("productId") as Int?
+                val name = item.get("name") as String?
+                val category = item.get("category") as String?
+                val price = (item.get("price")).toString().toDouble()
+                val stock = item.get("stock") as Int?
+
+                val shopItem =
+                    ShopItem(
+                        id,
+                        name,
+                        category,
+                        price,
+                        stock.toString()
+                    )
+
+                list.add(shopItem)
+            }
+        }catch (e: Exception){
+            Log.e("Error", e.message)
+        }
+
+        return list
+
+    }
+
+
+
+}

app/src/main/java/com/example/h_mal/shopapicasestudy/api/AsyncApiCall.kt

@@ -0,0 +1,59 @@
+package com.example.h_mal.shopapicasestudy.api
+
+import android.os.AsyncTask
+import android.util.Log
+import com.example.h_mal.shopapicasestudy.ui.ResponseListener
+import java.lang.Exception
+import java.net.HttpURLConnection
+import java.net.URL
+
+
+class AsyncApiCall(
+    val urlString : String,
+    val callBack : ResponseListener?
+): AsyncTask<String, Void, String>() {
+
+    override fun onPreExecute() {
+        super.onPreExecute()
+        callBack?.onStarted()
+    }
+
+    override fun doInBackground(vararg params: String?): String {
+
+
+        return try {
+            val url = URL(urlString)
+            val con = url.openConnection() as HttpURLConnection
+
+            if (urlString ==
+                "https://private-anon-21a48b3d0e-ddshop.apiary-mock.com/cart/1"){
+                con.requestMethod = "DELETE"
+
+            }
+
+            val code = con.responseCode
+
+            Log.i("reponse", "code = ${code}")
+
+            if (code == 204){
+                return "successful delete"
+            }
+
+            URL(urlString).readText()
+        }catch (e : Exception){
+            Log.e("error", e.message)
+            ""
+        }
+
+
+    }
+
+    override fun onPostExecute(result: String) {
+        if (result.isEmpty()){
+            callBack?.onFailure("Failed to retrieve")
+        }else{
+            callBack?.onSuccess()
+        }
+
+    }
+}

app/src/main/java/com/example/h_mal/shopapicasestudy/db/AppDatabase.kt

@@ -0,0 +1,44 @@
+package com.example.h_mal.shopapicasestudy.db
+
+import android.content.Context
+import androidx.room.Database
+import androidx.room.Room
+import androidx.room.RoomDatabase
+import com.example.h_mal.shopapicasestudy.db.entities.CartItemEntity
+import com.example.h_mal.shopapicasestudy.db.entities.ShopItemEntity
+
+
+@Database(
+    entities = [ShopItemEntity::class, CartItemEntity::class],
+    version = 1,
+    exportSchema = false
+)
+abstract class AppDatabase : RoomDatabase(){
+
+    abstract fun getWishListDao() : WishListDao
+    abstract fun getCartDao() : CartDao
+
+
+    companion object{
+
+        @Volatile
+        private var instance: AppDatabase? = null
+        private val LOCK = Any()
+
+        operator fun invoke(context: Context) = instance
+            ?: synchronized(LOCK){
+            instance
+                ?: buildDatabase(
+                    context
+                ).also {
+                instance = it
+            }
+        }
+
+        private fun buildDatabase(context: Context) = Room
+            .databaseBuilder(context.applicationContext,
+                AppDatabase::class.java,
+                "MyDatabase").allowMainThreadQueries()
+            .build()
+    }
+}

app/src/main/java/com/example/h_mal/shopapicasestudy/db/CartDao.kt

@@ -0,0 +1,54 @@
+package com.example.h_mal.shopapicasestudy.db
+
+import androidx.lifecycle.LiveData
+import androidx.room.*
+import com.example.h_mal.shopapicasestudy.db.entities.CartItemEntity
+
+@Dao
+interface CartDao {
+
+    @Insert(onConflict = OnConflictStrategy.IGNORE)
+    fun insertItemToCart(item : CartItemEntity) : Long
+
+    @Query("SELECT * FROM CartItemEntity")
+    fun getCartlist() : LiveData<MutableList<CartItemEntity>>
+
+    @Query("SELECT * FROM CartItemEntity WHERE id IN(:id)")
+    fun getSingleItem(id: Int) : LiveData<CartItemEntity>
+
+    @Delete
+    fun delete(item: CartItemEntity) : Int
+
+    @Query("UPDATE CartItemEntity SET quantity = quantity + 1 WHERE id IN (:id)")
+    fun incremementItem(id : Int) : Int
+
+    @Query("UPDATE CartItemEntity SET quantity = quantity - 1 WHERE id IN (:id)")
+    fun decrementItem(id : Int) : Int
+
+    @Query("SELECT SUM(price) FROM CartItemEntity")
+    fun getTotalSumOFCart() : Double
+
+    @Transaction
+    fun upsert(item : CartItemEntity) : Int{
+        val id = insertItemToCart(item)
+
+        val idInt = id.toInt()
+
+        if (idInt == -1){
+            return incremementItem(item.id!!)
+        }else{
+            return idInt
+        }
+    }
+
+    @Transaction
+    fun downsert(item : CartItemEntity){
+        val quantity = item.quantity!!
+
+        if (quantity >1){
+            decrementItem(item.id!!)
+        }else{
+            delete(item)
+        }
+    }
+}

app/src/main/java/com/example/h_mal/shopapicasestudy/db/WishListDao.kt

@@ -0,0 +1,22 @@
+package com.example.h_mal.shopapicasestudy.db
+
+import androidx.lifecycle.LiveData
+import androidx.room.*
+import com.example.h_mal.shopapicasestudy.db.entities.ShopItemEntity
+
+@Dao
+interface WishListDao {
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    fun insertItemToWishList(item : ShopItemEntity) : Long
+
+    @Query("SELECT * FROM ShopItemEntity")
+    fun getWishlist() : LiveData<MutableList<ShopItemEntity>>
+
+    @Query("SELECT * FROM ShopItemEntity WHERE id IN(:id)")
+    fun getSingleItem(id: Int) : LiveData<ShopItemEntity>
+
+    @Delete
+    fun delete(item: ShopItemEntity) : Int
+
+}

app/src/main/java/com/example/h_mal/shopapicasestudy/db/entities/CartItemEntity.kt

@@ -0,0 +1,14 @@
+package com.example.h_mal.shopapicasestudy.db.entities
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+
+@Entity
+data class CartItemEntity(
+    @PrimaryKey(autoGenerate = false)
+    val id : Int? = null,
+    val name : String? = null,
+    val category : String? = null,
+    val price  : Double? = null,
+    val quantity : Int? = null
+)

app/src/main/java/com/example/h_mal/shopapicasestudy/db/entities/ShopItemEntity.kt

@@ -0,0 +1,18 @@
+package com.example.h_mal.shopapicasestudy.db.entities
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+
+@Entity
+data class ShopItemEntity(
+    @PrimaryKey(autoGenerate = false)
+    val id : Int? = null,
+    val name : String? = null,
+    val category : String? = null,
+    val price  : Double? = null,
+    val stock : Int? = null
+){
+    fun createCartItem(): CartItemEntity{
+        return CartItemEntity(id, name, category, price,1)
+    }
+}

app/src/main/java/com/example/h_mal/shopapicasestudy/models/ShopItem.kt

@@ -0,0 +1,32 @@
+package com.example.h_mal.shopapicasestudy.models
+
+import com.example.h_mal.shopapicasestudy.db.entities.CartItemEntity
+import com.example.h_mal.shopapicasestudy.db.entities.ShopItemEntity
+
+data class ShopItem(
+    val id : Int?,
+    val name : String?,
+    val category : String?,
+    val price  : Double?,
+    val stock : String?
+){
+    fun createFromObject(): ShopItemEntity {
+        return ShopItemEntity(
+            id,
+            name,
+            category,
+            price,
+            stock?.toInt()
+        )
+    }
+
+    fun createCartItem(): CartItemEntity {
+        return CartItemEntity(
+            id,
+            name,
+            category,
+            price,
+            1
+        )
+    }
+}

app/src/main/java/com/example/h_mal/shopapicasestudy/repositories/ShopItemRepository.kt

@@ -0,0 +1,40 @@
+package com.example.h_mal.shopapicasestudy.repositories
+
+import com.example.h_mal.shopapicasestudy.api.Api
+import com.example.h_mal.shopapicasestudy.ApiApplication
+import com.example.h_mal.shopapicasestudy.db.AppDatabase
+import com.example.h_mal.shopapicasestudy.db.entities.CartItemEntity
+import com.example.h_mal.shopapicasestudy.db.entities.ShopItemEntity
+import com.example.h_mal.shopapicasestudy.models.ShopItem
+
+class ShopItemRepository (
+    val api: Api = Api(),
+    val db : AppDatabase = ApiApplication.db!!
+) {
+
+
+    fun addWishItem(item: ShopItem): Long{
+        val i = item.createFromObject()
+        return db.getWishListDao().insertItemToWishList(i)
+    }
+
+    fun deleteWishListItem(item : ShopItemEntity) : Int =
+        db.getWishListDao().delete(item)
+
+
+    fun getWishList() = db.getWishListDao().getWishlist()
+
+    fun addCartItem(item: CartItemEntity): Int
+     = db.getCartDao().upsert(item)
+
+
+    fun decrementItem(item: CartItemEntity): Int
+    = db.getCartDao().decrementItem(item.id!!)
+
+    fun deleteCartItem(item : CartItemEntity): Int =
+        db.getCartDao().delete(item)
+
+    fun getCartList() = db.getCartDao().getCartlist()
+
+    fun getTotalPrice() :Double = db.getCartDao().getTotalSumOFCart()
+}

app/src/main/java/com/example/h_mal/shopapicasestudy/ui/CartActivity.kt

@@ -0,0 +1,65 @@
+package com.example.h_mal.shopapicasestudy.ui
+
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import android.util.Log
+import android.view.View
+import android.widget.Toast
+import androidx.databinding.DataBindingUtil
+import androidx.lifecycle.Observer
+import androidx.lifecycle.ViewModelProviders
+import com.example.h_mal.shopapicasestudy.R
+import com.example.h_mal.shopapicasestudy.adapters.CartlistAdapter
+import com.example.h_mal.shopapicasestudy.databinding.ActivityCartBinding
+import com.example.h_mal.shopapicasestudy.viewmodels.ActivityCartViewModel
+import com.example.h_mal.shopapicasestudy.viewmodels.CartViewModel
+import kotlinx.android.synthetic.main.activity_cart.*
+import kotlinx.android.synthetic.main.activity_main.*
+
+class CartActivity : AppCompatActivity(), ResponseListener {
+
+    companion object{
+        var cartResponseListener: ResponseListener? = null
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        val binding: ActivityCartBinding = DataBindingUtil.setContentView(this,R.layout.activity_cart)
+        val cartViewModel =  ViewModelProviders.of(this).get(ActivityCartViewModel::class.java)
+        binding.viewmodel = cartViewModel
+
+        cartResponseListener = this
+
+        cartViewModel.getCurrentDbItems().observe(this, Observer {
+            val adap =
+                CartlistAdapter(
+                    this,
+                    it
+                )
+            cart_list_view.adapter = adap
+
+            Log.i("Total", "executed")
+
+            total_text.text = cartViewModel.setTotalPrice()
+
+            onSuccess()
+        })
+
+
+    }
+
+    override fun onStarted() {
+        progress_bar_cart.visibility = View.VISIBLE
+    }
+
+    override fun onSuccess() {
+        progress_bar_cart.visibility = View.GONE
+    }
+
+    override fun onFailure(message: String) {
+        Toast.makeText(this,message, Toast.LENGTH_LONG).show()
+
+        progress_bar_cart.visibility = View.GONE
+    }
+}

app/src/main/java/com/example/h_mal/shopapicasestudy/ui/MainActivity.kt

@@ -0,0 +1,91 @@
+package com.example.h_mal.shopapicasestudy.ui
+
+import android.content.Intent
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import android.view.Menu
+import android.view.MenuItem
+import android.view.View
+import android.widget.Toast
+import androidx.databinding.DataBindingUtil
+import androidx.lifecycle.Observer
+import androidx.lifecycle.ViewModelProviders
+import com.example.h_mal.shopapicasestudy.R
+import com.example.h_mal.shopapicasestudy.adapters.ListViewAdapter
+import com.example.h_mal.shopapicasestudy.databinding.ActivityMainBinding
+import com.example.h_mal.shopapicasestudy.viewmodels.MainViewModel
+import kotlinx.android.synthetic.main.activity_main.*
+
+class MainActivity : AppCompatActivity(),
+    ResponseListener {
+
+    companion object{
+        var responseListener: ResponseListener? = null
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        val binding: ActivityMainBinding = DataBindingUtil.setContentView(this,
+            R.layout.activity_main
+        )
+        val viewModel = ViewModelProviders.of(this).get(MainViewModel::class.java)
+        binding.viewmodel = viewModel
+
+        responseListener = this
+
+        //call to retrieve list
+        viewModel.callApiShopList()
+
+        //observable an live list to populate the adapter and applu
+        viewModel.getShopList().observe(this, Observer {
+            val adapater =
+                ListViewAdapter(
+                    this,
+                    it
+                )
+            list_view.adapter = adapater
+        })
+
+    }
+
+    //create a menu to navigate to other activities
+    override fun onCreateOptionsMenu(menu: Menu?): Boolean {
+        menuInflater.inflate(R.menu.menu, menu)
+
+        return super.onCreateOptionsMenu(menu)
+    }
+
+    override fun onOptionsItemSelected(item: MenuItem?): Boolean {
+        when (item?.itemId){
+            R.id.wish_list ->{
+                val intent = Intent(this,
+                    WishListActivity::class.java)
+                startActivity(intent)
+
+            }
+            R.id.cart ->{
+                val intent = Intent(this,
+                    CartActivity::class.java)
+                startActivity(intent)
+            }
+        }
+
+
+        return super.onOptionsItemSelected(item)
+    }
+
+    override fun onStarted() {
+        progress_bar.visibility = View.VISIBLE
+    }
+
+    override fun onSuccess() {
+        progress_bar.visibility = View.GONE
+    }
+
+    override fun onFailure(message: String) {
+        Toast.makeText(this,message, Toast.LENGTH_LONG).show()
+
+        progress_bar.visibility = View.GONE
+    }
+}

app/src/main/java/com/example/h_mal/shopapicasestudy/ui/ResponseListener.kt

@@ -0,0 +1,8 @@
+package com.example.h_mal.shopapicasestudy.ui
+
+interface ResponseListener{
+    fun onStarted()
+    fun onSuccess()
+    fun onFailure(message: String)
+
+}

app/src/main/java/com/example/h_mal/shopapicasestudy/ui/WishListActivity.kt

@@ -0,0 +1,62 @@
+package com.example.h_mal.shopapicasestudy.ui
+
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import android.view.View
+import android.widget.Toast
+import androidx.databinding.DataBindingUtil
+import androidx.lifecycle.Observer
+import androidx.lifecycle.ViewModelProviders
+import com.example.h_mal.shopapicasestudy.R
+import com.example.h_mal.shopapicasestudy.viewmodels.WishListViewModel
+import com.example.h_mal.shopapicasestudy.adapters.WishlistAdapter
+import com.example.h_mal.shopapicasestudy.databinding.ActivityWishListBinding
+import com.example.h_mal.shopapicasestudy.viewmodels.ActivityWishViewModel
+import kotlinx.android.synthetic.main.activity_main.*
+import kotlinx.android.synthetic.main.activity_wish_list.*
+
+class WishListActivity : AppCompatActivity(),
+    ResponseListener {
+
+    companion object{
+        var wishResponseListener: ResponseListener? = null
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        val binding: ActivityWishListBinding = DataBindingUtil.setContentView(this,
+            R.layout.activity_wish_list
+        )
+        val viewModel = ViewModelProviders.of(this).get(ActivityWishViewModel::class.java)
+        binding.viewmodel = viewModel
+
+        wishResponseListener = this
+
+        viewModel.getCurrentDbItems().observe(this, Observer {
+            val adap =
+                WishlistAdapter(
+                    this,
+                    it
+                )
+            wishlistview.adapter = adap
+
+        })
+
+        onSuccess()
+    }
+
+    override fun onStarted() {
+        progress_bar_wish.visibility = View.VISIBLE
+    }
+
+    override fun onSuccess() {
+        progress_bar_wish.visibility = View.GONE
+    }
+
+    override fun onFailure(message: String) {
+        Toast.makeText(this,message, Toast.LENGTH_LONG).show()
+
+        progress_bar_wish.visibility = View.GONE
+    }
+}

app/src/main/java/com/example/h_mal/shopapicasestudy/viewmodels/ActivityCartViewModel.kt

@@ -0,0 +1,19 @@
+package com.example.h_mal.shopapicasestudy.viewmodels
+
+import android.util.Log
+import androidx.lifecycle.ViewModel
+import com.example.h_mal.shopapicasestudy.repositories.ShopItemRepository
+import kotlin.math.log
+
+class ActivityCartViewModel(
+    private val repository: ShopItemRepository = ShopItemRepository()
+) : ViewModel(){
+
+    fun getCurrentDbItems() = repository.getCartList()
+
+    fun setTotalPrice() : String{
+        val total = repository.getTotalPrice().toString()
+        Log.i("total", total)
+        return total
+    }
+}

app/src/main/java/com/example/h_mal/shopapicasestudy/viewmodels/ActivityWishViewModel.kt

@@ -0,0 +1,14 @@
+package com.example.h_mal.shopapicasestudy.viewmodels
+
+import androidx.lifecycle.ViewModel
+import com.example.h_mal.shopapicasestudy.api.AsyncApiCall
+import com.example.h_mal.shopapicasestudy.repositories.ShopItemRepository
+import com.example.h_mal.shopapicasestudy.ui.ResponseListener
+
+class ActivityWishViewModel(
+    private val repository: ShopItemRepository = ShopItemRepository()
+) : ViewModel(){
+
+    fun getCurrentDbItems() = repository.getWishList()
+
+}

app/src/main/java/com/example/h_mal/shopapicasestudy/viewmodels/CartViewModel.kt

@@ -0,0 +1,45 @@
+package com.example.h_mal.shopapicasestudy.viewmodels
+
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.ViewModel
+import com.example.h_mal.shopapicasestudy.api.AsyncApiCall
+import com.example.h_mal.shopapicasestudy.db.entities.CartItemEntity
+import com.example.h_mal.shopapicasestudy.db.entities.ShopItemEntity
+import com.example.h_mal.shopapicasestudy.repositories.ShopItemRepository
+import com.example.h_mal.shopapicasestudy.ui.CartActivity.Companion.cartResponseListener
+import com.example.h_mal.shopapicasestudy.ui.ResponseListener
+
+class CartViewModel(
+    item: CartItemEntity?,
+    private val repository: ShopItemRepository = ShopItemRepository()
+) : ViewModel(){
+
+    val id : Int? = item?.id
+    val name : String? = item?.name
+    val category :String? = item?.category
+    val price : String? = item?.price.toString()
+    val quantity : String? = item?.quantity.toString()
+
+    fun deleteItemFromCart(item : CartItemEntity): String{
+        val response =
+            AsyncApiCall(
+                "https://private-anon-21a48b3d0e-ddshop.apiary-mock.com/cart/1",
+                cartResponseListener
+            )
+                .execute()
+                .get()
+
+        if (!response.isEmpty()){
+            repository.deleteCartItem(item)
+
+        }
+
+        return response
+    }
+
+    fun getTotalPrice(): String{
+
+        return ""
+    }
+
+}

app/src/main/java/com/example/h_mal/shopapicasestudy/viewmodels/ListViewModel.kt

@@ -0,0 +1,40 @@
+package com.example.h_mal.shopapicasestudy.viewmodels
+
+import androidx.lifecycle.ViewModel
+import com.example.h_mal.shopapicasestudy.api.AsyncApiCall
+import com.example.h_mal.shopapicasestudy.db.entities.CartItemEntity
+import com.example.h_mal.shopapicasestudy.db.entities.ShopItemEntity
+import com.example.h_mal.shopapicasestudy.models.ShopItem
+import com.example.h_mal.shopapicasestudy.repositories.ShopItemRepository
+import com.example.h_mal.shopapicasestudy.ui.ResponseListener
+
+class ListViewModel(
+    item : ShopItem,
+    private val repository: ShopItemRepository = ShopItemRepository()
+) : ViewModel(){
+
+    val id : Int? = item.id
+    val name : String? = item.name
+    val category :String? = item.category
+    val price : String? = item.price.toString()
+    val stock : String? = item.stock
+
+
+    fun insertWishListItem(shopItem : ShopItem) = repository.addWishItem(shopItem)
+
+    fun insertCartListItem(cartItem : CartItemEntity, responseListener : ResponseListener?): String{
+        val response =
+            AsyncApiCall(
+                "https://private-anon-f3c1195210-ddshop.apiary-mock.com/products",
+                responseListener
+            )
+                .execute()
+                .get()
+
+        if (!response.isEmpty()){
+            repository.addCartItem(cartItem)
+        }
+
+        return response
+    }
+}

app/src/main/java/com/example/h_mal/shopapicasestudy/viewmodels/MainViewModel.kt

@@ -0,0 +1,37 @@
+package com.example.h_mal.shopapicasestudy.viewmodels
+
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import com.example.h_mal.shopapicasestudy.api.AsyncApiCall
+import com.example.h_mal.shopapicasestudy.ui.ResponseListener
+import com.example.h_mal.shopapicasestudy.models.ShopItem
+import com.example.h_mal.shopapicasestudy.repositories.ShopItemRepository
+import com.example.h_mal.shopapicasestudy.ui.MainActivity.Companion.responseListener
+
+
+class MainViewModel(
+    private val repository: ShopItemRepository = ShopItemRepository()
+) : ViewModel(){
+
+    private var shopList: MutableLiveData<MutableList<ShopItem>> = MutableLiveData()
+
+
+    fun getShopList(): MutableLiveData<MutableList<ShopItem>> {
+        return shopList
+    }
+
+
+    fun callApiShopList(){
+        val jsonResponse =
+            AsyncApiCall(
+                "https://private-anon-f3c1195210-ddshop.apiary-mock.com/products",
+                responseListener
+            )
+            .execute()
+            .get()
+
+        shopList.value = repository.api.parseJson(jsonResponse)
+
+    }
+
+}

app/src/main/java/com/example/h_mal/shopapicasestudy/viewmodels/WishListViewModel.kt

@@ -0,0 +1,40 @@
+package com.example.h_mal.shopapicasestudy.viewmodels
+
+import androidx.lifecycle.ViewModel
+import com.example.h_mal.shopapicasestudy.api.AsyncApiCall
+import com.example.h_mal.shopapicasestudy.db.entities.ShopItemEntity
+import com.example.h_mal.shopapicasestudy.repositories.ShopItemRepository
+import com.example.h_mal.shopapicasestudy.ui.ResponseListener
+import com.example.h_mal.shopapicasestudy.ui.WishListActivity.Companion.wishResponseListener
+
+class WishListViewModel(
+    item: ShopItemEntity?,
+    private val repository: ShopItemRepository = ShopItemRepository()
+) : ViewModel() {
+
+    val id : Int? = item?.id
+    val name : String? = item?.name
+    val category :String? = item?.category
+    val price : String? = item?.price.toString()
+    val stock : String? = item?.stock.toString()
+
+    fun deleteFromWishList(item : ShopItemEntity) = repository.deleteWishListItem(item)
+
+    fun insertCartListItem(shopItem : ShopItemEntity): String{
+        val response =
+            AsyncApiCall(
+                "https://private-anon-f3c1195210-ddshop.apiary-mock.com/products",
+                wishResponseListener
+            )
+                .execute()
+                .get()
+
+        if (!response.isEmpty()){
+            val i = shopItem.createCartItem()
+            repository.addCartItem(i)
+        }
+
+        return response
+    }
+
+}

app/src/main/res/drawable-v24/ic_launcher_foreground.xml

@@ -0,0 +1,34 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:aapt="http://schemas.android.com/aapt"
+        android:width="108dp"
+        android:height="108dp"
+        android:viewportHeight="108"
+        android:viewportWidth="108">
+    <path
+            android:fillType="evenOdd"
+            android:pathData="M32,64C32,64 38.39,52.99 44.13,50.95C51.37,48.37 70.14,49.57 70.14,49.57L108.26,87.69L108,109.01L75.97,107.97L32,64Z"
+            android:strokeColor="#00000000"
+            android:strokeWidth="1">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                    android:endX="78.5885"
+                    android:endY="90.9159"
+                    android:startX="48.7653"
+                    android:startY="61.0927"
+                    android:type="linear">
+                <item
+                        android:color="#44000000"
+                        android:offset="0.0"/>
+                <item
+                        android:color="#00000000"
+                        android:offset="1.0"/>
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+            android:fillColor="#FFFFFF"
+            android:fillType="nonZero"
+            android:pathData="M66.94,46.02L66.94,46.02C72.44,50.07 76,56.61 76,64L32,64C32,56.61 35.56,50.11 40.98,46.06L36.18,41.19C35.45,40.45 35.45,39.3 36.18,38.56C36.91,37.81 38.05,37.81 38.78,38.56L44.25,44.05C47.18,42.57 50.48,41.71 54,41.71C57.48,41.71 60.78,42.57 63.68,44.05L69.11,38.56C69.84,37.81 70.98,37.81 71.71,38.56C72.44,39.3 72.44,40.45 71.71,41.19L66.94,46.02ZM62.94,56.92C64.08,56.92 65,56.01 65,54.88C65,53.76 64.08,52.85 62.94,52.85C61.8,52.85 60.88,53.76 60.88,54.88C60.88,56.01 61.8,56.92 62.94,56.92ZM45.06,56.92C46.2,56.92 47.13,56.01 47.13,54.88C47.13,53.76 46.2,52.85 45.06,52.85C43.92,52.85 43,53.76 43,54.88C43,56.01 43.92,56.92 45.06,56.92Z"
+            android:strokeColor="#00000000"
+            android:strokeWidth="1"/>
+</vector>

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

@@ -0,0 +1,74 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        android:height="108dp"
+        android:width="108dp"
+        android:viewportHeight="108"
+        android:viewportWidth="108">
+    <path android:fillColor="#008577"
+          android:pathData="M0,0h108v108h-108z"/>
+    <path android:fillColor="#00000000" android:pathData="M9,0L9,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,0L19,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M29,0L29,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M39,0L39,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M49,0L49,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M59,0L59,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M69,0L69,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M79,0L79,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M89,0L89,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M99,0L99,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,9L108,9"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,19L108,19"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,29L108,29"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,39L108,39"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,49L108,49"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,59L108,59"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,69L108,69"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,79L108,79"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,89L108,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,99L108,99"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,29L89,29"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,39L89,39"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,49L89,49"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,59L89,59"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,69L89,69"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,79L89,79"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M29,19L29,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M39,19L39,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M49,19L49,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M59,19L59,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M69,19L69,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M79,19L79,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+</vector>

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

@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:app="http://schemas.android.com/apk/res-auto"
+        xmlns:tools="http://schemas.android.com/tools"
+        >
+
+    <data>
+        <variable
+                name="viewmodel"
+                type="com.example.h_mal.shopapicasestudy.viewmodels.ActivityCartViewModel" />
+    </data>
+
+    <RelativeLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            tools:context=".ui.CartActivity">
+            <ListView
+                    android:id="@+id/cart_list_view"
+                    android:layout_width="match_parent"
+                    android:layout_height="match_parent"
+                    android:layout_above="@id/lin_lay"/>
+
+            <LinearLayout
+                    android:id="@+id/lin_lay"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_margin="12dp"
+                    android:layout_alignParentBottom="true">
+                    <TextView
+                            android:text="Total = "
+                            android:layout_width="0dp"
+                            android:layout_height="wrap_content"
+                            android:layout_weight="1"/>
+                    <TextView
+                            android:id="@+id/total_text"
+                            android:layout_width="0dp"
+                            android:layout_height="wrap_content"
+                            android:layout_weight="1"/>
+            </LinearLayout>
+
+            <ProgressBar
+                    android:id="@+id/progress_bar_cart"
+                    android:layout_centerInParent="true"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"/>
+    </RelativeLayout>
+</layout>
+

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

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout     xmlns:android="http://schemas.android.com/apk/res/android"
+            xmlns:tools="http://schemas.android.com/tools"
+            xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <data>
+        <variable name="viewmodel"
+                  type="com.example.h_mal.shopapicasestudy.viewmodels.MainViewModel"/>
+    </data>
+
+    <RelativeLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            tools:context=".ui.MainActivity">
+
+        <ListView
+                android:id="@+id/list_view"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"/>
+
+        <ProgressBar
+                android:id="@+id/progress_bar"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_centerInParent="true"/>
+
+    </RelativeLayout>
+</layout>

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

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:app="http://schemas.android.com/apk/res-auto"
+        xmlns:tools="http://schemas.android.com/tools"
+        >
+
+    <data>
+        <variable
+                name="viewmodel"
+                type="com.example.h_mal.shopapicasestudy.viewmodels.ActivityWishViewModel" />
+    </data>
+
+        <RelativeLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            tools:context=".ui.WishListActivity">
+            <ListView
+                android:id="@+id/wishlistview"
+                    android:layout_width="match_parent"
+                    android:layout_height="match_parent"/>
+
+        <ProgressBar
+                android:id="@+id/progress_bar_wish"
+                android:layout_centerInParent="true"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"/>
+    </RelativeLayout>
+</layout>
+

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

@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        >
+    
+    <data>
+        <variable
+                name="viewmodel"
+                type="com.example.h_mal.shopapicasestudy.viewmodels.CartViewModel" />
+    </data>
+    
+    <LinearLayout
+            android:orientation="vertical"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:padding="12dp">
+
+        <TextView
+                android:id="@+id/name"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@{viewmodel.name}"/>
+
+        <TextView
+                android:id="@+id/category"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@{viewmodel.category}"/>
+
+        <TextView
+            android:id="@+id/price"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@{viewmodel.price}"/>
+
+        <TextView
+            android:id="@+id/stock"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@{viewmodel.quantity}"/>
+
+    </LinearLayout>
+</layout>

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

@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        >
+    
+    <data>
+        <variable
+                name="viewmodel"
+                type="com.example.h_mal.shopapicasestudy.viewmodels.ListViewModel" />
+    </data>
+    
+    <LinearLayout
+            android:orientation="vertical"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:padding="12dp">
+
+        <TextView
+                android:id="@+id/name"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@{viewmodel.name}"/>
+
+        <TextView
+                android:id="@+id/category"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@{viewmodel.category}"/>
+
+        <TextView
+            android:id="@+id/price"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@{viewmodel.price}"/>
+
+        <TextView
+            android:id="@+id/stock"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@{viewmodel.stock}"/>
+
+    </LinearLayout>
+</layout>

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

@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        >
+    
+    <data>
+        <variable
+                name="viewmodel"
+                type="com.example.h_mal.shopapicasestudy.viewmodels.WishListViewModel" />
+    </data>
+    
+    <LinearLayout
+            android:orientation="vertical"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:padding="12dp">
+
+        <TextView
+                android:id="@+id/name"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@{viewmodel.name}"/>
+
+        <TextView
+                android:id="@+id/category"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@{viewmodel.category}"/>
+
+        <TextView
+            android:id="@+id/price"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@{viewmodel.price}"/>
+
+        <TextView
+            android:id="@+id/stock"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@{viewmodel.stock}"/>
+
+    </LinearLayout>
+</layout>

app/src/main/res/menu/menu.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <item
+            android:id="@+id/wish_list"
+            android:title="Wish List" />
+    <item
+            android:id="@+id/cart"
+            android:title="Cart" />
+</menu>

app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background"/>
+    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background"/>
+    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>

app/src/main/res/values/colors.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="colorPrimary">#008577</color>
+    <color name="colorPrimaryDark">#00574B</color>
+    <color name="colorAccent">#D81B60</color>
+</resources>

app/src/main/res/values/strings.xml

@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">ShopApiCaseStudy</string>
+</resources>

app/src/main/res/values/styles.xml

@@ -0,0 +1,11 @@
+<resources>
+
+    <!-- Base application theme. -->
+    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
+        <!-- Customize your theme here. -->
+        <item name="colorPrimary">@color/colorPrimary</item>
+        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
+        <item name="colorAccent">@color/colorAccent</item>
+    </style>
+
+</resources>

app/src/test/java/com/example/h_mal/shopapicasestudy/ExampleUnitTest.kt

@@ -0,0 +1,17 @@
+package com.example.h_mal.shopapicasestudy
+
+import org.junit.Test
+
+import org.junit.Assert.*
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+class ExampleUnitTest {
+    @Test
+    fun addition_isCorrect() {
+        assertEquals(4, 2 + 2)
+    }
+}