renamed files

added a ClickListener to provide the behavior to navigate to the ShoppinglistListsFragment
modified necessary files to implement the new behavior

app/src/main/java/de/chrissthecoder/store/MainActivity.kt

@@ -46,7 +46,7 @@ class MainActivity : AppCompatActivity() {
 
     override fun onCreateOptionsMenu(menu: Menu): Boolean {
         // Inflate the menu; this adds items to the action bar if it is present.
-        menuInflater.inflate(R.menu.main, menu)
+        menuInflater.inflate(R.menu.threedots, menu)
         return true
     }
 

app/src/main/java/de/chrissthecoder/store/adapter/DashboardFragmentPagerAdapter.kt

@@ -2,7 +2,7 @@ package de.chrissthecoder.store.adapter
 
 import androidx.fragment.app.Fragment
 import androidx.viewpager2.adapter.FragmentStateAdapter
-import de.chrissthecoder.store.ui.dashboard.tabfragment.shoppinglist.ShoplistFragment
+import de.chrissthecoder.store.ui.dashboard.tabfragment.shoppinglist.ShoppinglistShoplistFragment
 import de.chrissthecoder.store.ui.dashboard.tabfragment.UnderstockFragment
 
 class DashboardFragmentPagerAdapter(fragment: Fragment) : FragmentStateAdapter(fragment) {
@@ -12,7 +12,7 @@ class DashboardFragmentPagerAdapter(fragment: Fragment) : FragmentStateAdapter(f
     }
 
     override fun createFragment(position: Int) : Fragment {
-        return  if(position == 0)   { ShoplistFragment() }
+        return  if(position == 0)   { ShoppinglistShoplistFragment() }
                 else                { UnderstockFragment() }
     }
 }

app/src/main/java/de/chrissthecoder/store/adapter/ShoppinglistShoplistAdapter.kt

@@ -8,32 +8,31 @@ import android.widget.ImageView
 import android.widget.TextView
 import androidx.recyclerview.widget.RecyclerView
 import de.chrissthecoder.store.R
+import de.chrissthecoder.store.databinding.FragmentShoppinglistShoplistItemBinding
 import de.chrissthecoder.store.dataclass.ShoppinglistShoplistItem
+import de.chrissthecoder.store.interfaces.ShoppinglistShoplistItemClickListener
 
-class ShoppinglistShoplistAdapter(val shoplist: List<ShoppinglistShoplistItem>) : RecyclerView.Adapter<ShoppinglistShoplistAdapter.ItemViewHolder>() {
+class ShoppinglistShoplistAdapter(val shoplist: List<ShoppinglistShoplistItem>, private val listener: ShoppinglistShoplistItemClickListener) : RecyclerView.Adapter<ShoppinglistShoplistAdapter.ItemViewHolder>() {
-    inner class ItemViewHolder(view: View) : RecyclerView.ViewHolder(view) {
+    inner class ItemViewHolder(private val binding: FragmentShoppinglistShoplistItemBinding, private val listener: ShoppinglistShoplistItemClickListener) : RecyclerView.ViewHolder(binding.root) {
-        val shoplabel: TextView
+        fun bindItem(item: ShoppinglistShoplistItem) {
-        val shopicon: ImageView
+            binding.shoplabel.text = item.shoplabel
-        val shoppinglistCount: TextView
+            binding.shoppinglistCount.text = "(" + item.shoppinglistCount + ")"
-
+            binding.cardview.setOnClickListener {
-        init {
+                listener.onClick(item)
-            Log.d(this.javaClass.name,"Get necessary Views")
+            }
-            shoplabel = view.findViewById(R.id.shoplabel)
-            shopicon = view.findViewById(R.id.shopicon)
-            shoppinglistCount = view.findViewById(R.id.shoppinglistCount)
         }
     }
 
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ItemViewHolder {
         Log.d(this.javaClass.name, "Create new views (invoked by the layout manager)")
-        val view = LayoutInflater.from(parent.context).inflate(R.layout.fragment_shoppinglist_shoplist_item, parent, false)
+        val from = LayoutInflater.from(parent.context)
-        return ItemViewHolder(view)
+        val binding = FragmentShoppinglistShoplistItemBinding.inflate(from, parent, false)
+        return ItemViewHolder(binding, listener)
     }
 
     override fun onBindViewHolder(holder: ShoppinglistShoplistAdapter.ItemViewHolder, position: Int) {
         Log.d(this.javaClass.name,"Replace the contents of a view (invoked by the layout manager)")
-        holder.shoplabel.text = shoplist[position].shoplabel
+        holder.bindItem(shoplist[position])
-        holder.shoppinglistCount.text = "(" + shoplist[position].shoppinglistCount + ")"
     }
 
     override fun getItemCount(): Int {

app/src/main/java/de/chrissthecoder/store/interfaces/ShoppinglistShoplistItemClickListener.kt

@@ -0,0 +1,7 @@
+package de.chrissthecoder.store.interfaces
+
+import de.chrissthecoder.store.dataclass.ShoppinglistShoplistItem
+
+interface ShoppinglistShoplistItemClickListener {
+    fun onClick(shopitem: ShoppinglistShoplistItem)
+}

app/src/main/java/de/chrissthecoder/store/ui/dashboard/tabfragment/shoppinglist/ShoppinglistListsFragment.kt

@@ -0,0 +1,19 @@
+package de.chrissthecoder.store.ui.dashboard.tabfragment.shoppinglist
+
+import android.os.Bundle
+import androidx.fragment.app.Fragment
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import de.chrissthecoder.store.R
+
+class ShoppinglistListsFragment : Fragment() {
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        // Inflate the layout for this fragment
+        return inflater.inflate(R.layout.fragment_shoppinglist_lists, container, false)
+    }
+}

app/src/main/java/de/chrissthecoder/store/ui/dashboard/tabfragment/shoppinglist/ShoppinglistShoplistFragment.kt

@@ -5,14 +5,17 @@ import androidx.fragment.app.Fragment
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.navigation.fragment.findNavController
+import de.chrissthecoder.store.R
 import de.chrissthecoder.store.adapter.ShoppinglistShoplistAdapter
 import de.chrissthecoder.store.databinding.FragmentShoppinglistShoplistBinding
 import de.chrissthecoder.store.dataclass.ShoppinglistShoplistItem
+import de.chrissthecoder.store.interfaces.ShoppinglistShoplistItemClickListener
 
 /**
  * A [Fragment] subclass to list all shops that contains assigned shoppinglists.
  */
-class ShoplistFragment : Fragment() {
+class ShoppinglistShoplistFragment : Fragment(), ShoppinglistShoplistItemClickListener {
 
     private var _binding: FragmentShoppinglistShoplistBinding? = null
     private val binding get() = _binding!!
@@ -23,11 +26,16 @@ class ShoplistFragment : Fragment() {
         _binding = FragmentShoppinglistShoplistBinding.inflate(inflater, container, false)
 
         val shoplist = ArrayList<ShoppinglistShoplistItem>()
+        shoplist.add(ShoppinglistShoplistItem("Edeka", 0, 3))
 
         val shoplistRecyclerView = binding.shoplist
-        adapter = ShoppinglistShoplistAdapter(shoplist)
+        adapter = ShoppinglistShoplistAdapter(shoplist, this)
         shoplistRecyclerView.adapter = adapter
 
         return binding.root
     }
+
+    override fun onClick(shopitem: ShoppinglistShoplistItem) {
+        findNavController().navigate(R.id.action_nav_dashboard_to_shoppinglistLists)
+    }
 }

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

@@ -20,6 +20,6 @@
         android:layout_height="match_parent"
         android:layout_gravity="start"
         android:fitsSystemWindows="true"
-        app:headerLayout="@layout/nav_header_main"
+        app:headerLayout="@layout/burger_header"
-        app:menu="@menu/activity_main_drawer" />
+        app:menu="@menu/burger" />
 </androidx.drawerlayout.widget.DrawerLayout>

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

@@ -16,5 +16,5 @@
         app:layout_constraintLeft_toLeftOf="parent"
         app:layout_constraintRight_toRightOf="parent"
         app:layout_constraintTop_toTopOf="parent"
-        app:navGraph="@navigation/mobile_navigation" />
+        app:navGraph="@navigation/app_navigation" />
 </androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".ui.dashboard.tabfragment.shoppinglist.ShoppinglistListsFragment">
+
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -4,7 +4,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".ui.dashboard.tabfragment.shoppinglist.ShoplistFragment">
+    tools:context=".ui.dashboard.tabfragment.shoppinglist.ShoppinglistShoplistFragment">
 
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/shoplist"

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

@@ -1,11 +1,13 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout
+    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"
     android:layout_width="match_parent"
     android:layout_height="wrap_content">
 
     <androidx.cardview.widget.CardView
+        android:id="@+id/cardview"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_marginStart="15dp"

app/src/main/res/navigation/app_navigation.xml

@@ -9,7 +9,11 @@
         android:id="@+id/nav_dashboard"
         android:name="de.chrissthecoder.store.ui.dashboard.DashboardFragment"
         android:label="@string/menu_dashboard"
-        tools:layout="@layout/fragment_dashboard" />
+        tools:layout="@layout/fragment_dashboard" >
+        <action
+            android:id="@+id/action_nav_dashboard_to_shoppinglistLists"
+            app:destination="@id/shoppinglistLists" />
+    </fragment>
 
     <fragment
         android:id="@+id/nav_gallery"
@@ -22,4 +26,10 @@
         android:name="de.chrissthecoder.store.ui.slideshow.SlideshowFragment"
         android:label="@string/menu_slideshow"
         tools:layout="@layout/fragment_slideshow" />
+
+    <fragment
+        android:id="@+id/shoppinglistLists"
+        android:name="de.chrissthecoder.store.ui.dashboard.tabfragment.shoppinglist.ShoppinglistListsFragment"
+        android:label="@string/nav_shoppinglist"
+        tools:layout="@layout/fragment_shoppinglist_lists" />
 </navigation>

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

@@ -13,4 +13,6 @@
 
     <string name="tab_shoppinglist">Einkaufszettel</string>
     <string name="tab_understock">Minderbestand</string>
+
+    <string name="nav_shoppinglist">Einkaufszettel</string>
 </resources>