Parte 02

app/build.gradle

@@ -26,10 +26,11 @@ android {
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation 'com.android.support:appcompat-v7:26.1.0'
+    compile 'com.android.support:recyclerview-v7:26.1.0'
     implementation 'com.android.support.constraint:constraint-layout:1.0.2'
     testImplementation 'junit:junit:4.12'
     androidTestImplementation('com.android.support.test.espresso:espresso-core:3.0.1', {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
-    implementation"org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
 }

app/src/main/AndroidManifest.xml

@@ -9,13 +9,14 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
-        <activity android:name=".MainActivity">
+        <activity android:name=".Controller.MainActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <activity android:name=".Controller.ProductsActivity"></activity>
     </application>
 
 </manifest>

app/src/main/java/com/devf5/arthursalgado/coderswag/Adapters/CategoryAdapter.kt

@@ -0,0 +1,59 @@
+package com.devf5.arthursalgado.coderswag.Adapters
+
+import android.content.Context
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.BaseAdapter
+import android.widget.ImageView
+import android.widget.TextView
+import com.devf5.arthursalgado.coderswag.Model.Category
+import com.devf5.arthursalgado.coderswag.R
+
+/**
+ * Created by arthursalgado on 13/10/17.
+ */
+class CategoryAdapter constructor(val context: Context, val categories: List<Category>) : BaseAdapter() {
+
+    override fun getView(position: Int, convertView: View?, parent: ViewGroup?): View {
+        val categoryView : View
+        val holder: ViewHolder
+
+        if(convertView == null) {
+            categoryView = LayoutInflater.from(context).inflate(R.layout.category_list_item, null)
+            holder = ViewHolder()
+            holder.categoryImage = categoryView.findViewById(R.id.categoryImage)
+            holder.categoryName = categoryView.findViewById(R.id.categoryName)
+
+            categoryView.tag = holder // valor de cada view é o holder (unique value)
+        } else {
+            // Reutilizar a celular se já foi criada
+            holder = convertView.tag as ViewHolder
+            categoryView = convertView
+        }
+
+        val category = categories[position]
+        holder.categoryName?.text = category.title
+        val resourceId = context.resources.getIdentifier(category.image, "drawable", context.packageName)
+        holder.categoryImage?.setImageResource(resourceId)
+
+        return  categoryView
+    }
+
+    override fun getItem(position: Int): Any {
+        return categories[position]
+    }
+
+    override fun getItemId(position: Int): Long {
+        return 0
+    }
+
+    override fun getCount(): Int {
+        return categories.count()
+    }
+
+    private class ViewHolder {
+        var categoryImage: ImageView? = null
+        var categoryName: TextView? = null
+    }
+}

app/src/main/java/com/devf5/arthursalgado/coderswag/Adapters/CategoryRecycleAdapter.kt

@@ -0,0 +1,50 @@
+package com.devf5.arthursalgado.coderswag.Adapters
+
+import android.content.Context
+import android.support.v7.widget.RecyclerView
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ImageView
+import android.widget.TextView
+import com.devf5.arthursalgado.coderswag.Model.Category
+import com.devf5.arthursalgado.coderswag.R
+
+/**
+ * Created by arthursalgado on 13/10/17.
+ */
+
+/**
+ * val itemClick: (Category) -> Unit // Igual ao completion no Swift
+ * Unit = void
+ */
+
+class CategoryRecycleAdapter(val context: Context, val categories: List<Category>, val itemClick: (Category) -> Unit) : RecyclerView.Adapter<CategoryRecycleAdapter.Holder>() {
+
+    // Display data on specify location
+    override fun onBindViewHolder(holder: Holder?, position: Int) {
+        holder?.bindCategory(categories[position], context)
+    }
+
+    override fun getItemCount(): Int {
+        return categories.count()
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup?, viewType: Int): Holder {
+        val view = LayoutInflater.from(context).inflate(R.layout.category_list_item, parent, false)
+        return  Holder(view, itemClick)
+    }
+
+    // inner class pois é uma classe que está dentro de uma class maior
+    inner class Holder(itemView: View?, val itemClick: (Category) -> Unit) : RecyclerView.ViewHolder(itemView) {
+        val categoryImage = itemView?.findViewById<ImageView>(R.id.categoryImage)
+        val categoryName = itemView?.findViewById<TextView>(R.id.categoryName)
+
+        fun bindCategory(category: Category, context: Context) {
+            val resourceId = context.resources.getIdentifier(category.image, "drawable", context.packageName)
+            categoryImage?.setImageResource(resourceId)
+            categoryName?.text = category.title
+            itemView.setOnClickListener { itemClick(category) }
+        }
+    }
+}

app/src/main/java/com/devf5/arthursalgado/coderswag/Adapters/ProductsAdapter.kt

@@ -0,0 +1,44 @@
+package com.devf5.arthursalgado.coderswag.Adapters
+
+import android.content.Context
+import android.support.v7.widget.RecyclerView
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ImageView
+import android.widget.TextView
+import com.devf5.arthursalgado.coderswag.Model.Product
+import com.devf5.arthursalgado.coderswag.R
+
+/**
+ * Created by arthursalgado on 13/10/17.
+ */
+class ProductsAdapter(val context: Context, val products: List<Product>) : RecyclerView.Adapter<ProductsAdapter.ProductHolder>() {
+
+    override fun onBindViewHolder(holder: ProductHolder?, position: Int) {
+        holder?.bindProduct(products[position], context)
+    }
+
+    override fun getItemCount(): Int {
+        return products.count()
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup?, viewType: Int): ProductHolder {
+        val view = LayoutInflater.from(context).inflate(R.layout.product_list_item, parent, false)
+        return  ProductHolder(view)
+
+    }
+
+    inner class ProductHolder(itemView: View?) : RecyclerView.ViewHolder(itemView) {
+        val productImage = itemView?.findViewById<ImageView>(R.id.productImage)
+        val productName = itemView?.findViewById<TextView>(R.id.categoryName)
+        val productPrice = itemView?.findViewById<TextView>(R.id.productPrice)
+
+        fun bindProduct(product: Product, context: Context) {
+            val resourceId = context.resources.getIdentifier(product.image, "drawable", context.packageName)
+            productImage?.setImageResource(resourceId)
+            productName?.text = product.title
+            productPrice?.text = product.price
+        }
+    }
+}

app/src/main/java/com/devf5/arthursalgado/coderswag/Controller/MainActivity.kt

@@ -0,0 +1,46 @@
+package com.devf5.arthursalgado.coderswag.Controller
+
+import android.content.Intent
+import android.support.v7.app.AppCompatActivity
+import android.os.Bundle
+import android.support.v7.widget.LinearLayoutManager
+import com.devf5.arthursalgado.coderswag.Adapters.CategoryRecycleAdapter
+import com.devf5.arthursalgado.coderswag.R
+import com.devf5.arthursalgado.coderswag.Services.DataService
+import com.devf5.arthursalgado.coderswag.Utilities.EXTRA_CATEGORY
+import kotlinx.android.synthetic.main.activity_main.*
+
+class MainActivity : AppCompatActivity() {
+
+    lateinit var adapter : CategoryRecycleAdapter // Criamos com o recycle
+            //CategoryAdapter // Criamos um adapter específico para o layout do projeto
+            //ArrayAdapter<Category> // Adapter é o que controla as informações do model pra ser mostrado na ListView (view)
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+
+        // ArrayAdapter(context, que tipo de view que será mostrado na ListView, qual dado que será mostrado)
+        adapter = CategoryRecycleAdapter(this, DataService.categories) { category ->
+            val productIntent = Intent(this, ProductsActivity::class.java)
+            productIntent.putExtra(EXTRA_CATEGORY, category.title)
+            startActivity(productIntent)
+        }
+        categoryListView.adapter = adapter
+
+        val layoutManager = LinearLayoutManager(this)
+        categoryListView.layoutManager = layoutManager
+        categoryListView.setHasFixedSize(true)
+
+        // Não é a melhor maneira de implementar
+        //ArrayAdapter(this, android.R.layout.simple_list_item_1, DataService.categories)
+
+        // Saber em qual clicou. Mas vamos utilizar outro método com recycle views
+//        categoryListView.setOnItemClickListener { parent, view, position, id ->
+//            val category = DataService.categories[position]
+//            Toast.makeText(this, "You clicked on ${category.title} !", Toast.LENGTH_SHORT).show()
+//        }
+
+
+    }
+}

app/src/main/java/com/devf5/arthursalgado/coderswag/Controller/ProductsActivity.kt

@@ -0,0 +1,40 @@
+package com.devf5.arthursalgado.coderswag.Controller
+
+import android.content.res.Configuration
+import android.support.v7.app.AppCompatActivity
+import android.os.Bundle
+import android.support.v7.widget.GridLayoutManager
+import android.support.v7.widget.RecyclerView
+import com.devf5.arthursalgado.coderswag.Adapters.ProductsAdapter
+import com.devf5.arthursalgado.coderswag.R
+import com.devf5.arthursalgado.coderswag.Services.DataService
+import com.devf5.arthursalgado.coderswag.Utilities.EXTRA_CATEGORY
+import kotlinx.android.synthetic.main.activity_products.*
+
+class ProductsActivity : AppCompatActivity() {
+
+    lateinit var adapter : ProductsAdapter
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_products)
+
+        val type = intent.getStringExtra(EXTRA_CATEGORY)
+        adapter = ProductsAdapter(this, DataService.getProducts(type))
+
+        var spanCount = 2
+        val orientation = resources.configuration.orientation
+        if(orientation == Configuration.ORIENTATION_LANDSCAPE) {
+            spanCount = 3
+        }
+
+        val screenSize = resources.configuration.screenWidthDp
+        if(screenSize > 720) {
+            spanCount = 3
+        }
+
+        val layoutManager = GridLayoutManager(this, spanCount)
+        productListView.layoutManager = layoutManager as RecyclerView.LayoutManager?
+        productListView.adapter = adapter
+    }
+}

app/src/main/java/com/devf5/arthursalgado/coderswag/Model/Category.kt

@@ -0,0 +1,11 @@
+package com.devf5.arthursalgado.coderswag.Model
+
+/**
+ * Created by arthursalgado on 13/10/17.
+ */
+class Category constructor(val title: String, val image: String) {
+    // Tivemos que fazer o override pq o default é mostrar o local de memória do objeto, assim trocamos para mostrar por default o título do objeto
+    override fun toString(): String {
+        return title
+    }
+}

app/src/main/java/com/devf5/arthursalgado/coderswag/Model/Product.kt

@@ -0,0 +1,6 @@
+package com.devf5.arthursalgado.coderswag.Model
+
+/**
+ * Created by arthursalgado on 13/10/17.
+ */
+class Product constructor(val title: String, val price: String, val image: String)

app/src/main/java/com/devf5/arthursalgado/coderswag/Services/DataService.kt

@@ -0,0 +1,85 @@
+package com.devf5.arthursalgado.coderswag.Services
+
+import com.devf5.arthursalgado.coderswag.Model.Category
+import com.devf5.arthursalgado.coderswag.Model.Product
+
+/**
+ * Created by arthursalgado on 13/10/17.
+ */
+object DataService {
+
+    val categories = listOf(
+            Category("SHIRTS", "shirtimage"),
+            Category("HOODIES", "hoodieimage"),
+            Category("HATS", "hatimage"),
+            Category("DIGITAL", "digitalgoodsimage"),
+            Category("SHIRTS", "shirtimage"),
+            Category("HOODIES", "hoodieimage"),
+            Category("HATS", "hatimage"),
+            Category("DIGITAL", "digitalgoodsimage"),
+            Category("SHIRTS", "shirtimage"),
+            Category("HOODIES", "hoodieimage"),
+            Category("HATS", "hatimage"),
+            Category("DIGITAL", "digitalgoodsimage")
+    )
+
+    val hats = listOf(
+            Product("Devslopes Graphic Beanie", "$18", "hat1"),
+            Product("Devslopes Hat Black", "$14", "hat2"),
+            Product("Devslopes Hat White", "$16", "hat3"),
+            Product("Devslopes Hat Snapback", "$20", "hat4"),
+            Product("Devslopes Graphic Beanie", "$18", "hat1"),
+            Product("Devslopes Hat Black", "$14", "hat2"),
+            Product("Devslopes Hat White", "$16", "hat3"),
+            Product("Devslopes Hat Snapback", "$20", "hat4"),
+            Product("Devslopes Graphic Beanie", "$18", "hat1"),
+            Product("Devslopes Hat Black", "$14", "hat2"),
+            Product("Devslopes Hat White", "$16", "hat3"),
+            Product("Devslopes Hat Snapback", "$20", "hat4")
+    )
+
+    val hoodies = listOf(
+            Product("Devslopes Hoodie Gray", "$28", "hoodie1"),
+            Product("Devslopes Hoodie Red", "$32", "hoodie2"),
+            Product("Devslopes Gray Hoodie", "$33", "hoodie3"),
+            Product("Devslopes Black Hoodie", "$35", "hoodie4"),
+            Product("Devslopes Hoodie Gray", "$28", "hoodie1"),
+            Product("Devslopes Hoodie Red", "$32", "hoodie2"),
+            Product("Devslopes Gray Hoodie", "$33", "hoodie3"),
+            Product("Devslopes Black Hoodie", "$35", "hoodie4"),
+            Product("Devslopes Hoodie Gray", "$28", "hoodie1"),
+            Product("Devslopes Hoodie Red", "$32", "hoodie2"),
+            Product("Devslopes Gray Hoodie", "$33", "hoodie3"),
+            Product("Devslopes Black Hoodie", "$35", "hoodie4")
+    )
+
+    val shirts = listOf(
+            Product("Devslopes Shirt Black", "$18", "shirt1"),
+            Product("Devslopes Badge Light Gray", "$20", "shirt2"),
+            Product("Devslopes Logo Shirt Red", "$22", "shirt3"),
+            Product("Devslopes Hustle", "$22", "shirt4"),
+            Product("Kickflip Studios Hustle", "$18", "shirt5"),
+            Product("Devslopes Shirt Black", "$18", "shirt1"),
+            Product("Devslopes Badge Light Gray", "$20", "shirt2"),
+            Product("Devslopes Logo Shirt Red", "$22", "shirt3"),
+            Product("Devslopes Hustle", "$22", "shirt4"),
+            Product("Kickflip Studios Hustle", "$18", "shirt5"),
+            Product("Devslopes Shirt Black", "$18", "shirt1"),
+            Product("Devslopes Badge Light Gray", "$20", "shirt2"),
+            Product("Devslopes Logo Shirt Red", "$22", "shirt3"),
+            Product("Devslopes Hustle", "$22", "shirt4"),
+            Product("Kickflip Studios Hustle", "$18", "shirt5")
+    )
+
+    val digitalGood = listOf<Product>()
+
+    fun getProducts(category: String) : List<Product> {
+
+        return when(category) {
+            "SHIRTS" -> shirts
+            "HATS" -> hats
+            "HOODIES" -> hoodies
+            else -> digitalGood
+        }
+    }
+}