Getting back mainactivity and adding categories

app/build.gradle.kts

@@ -49,6 +49,8 @@ dependencies {
     androidTestImplementation(libs.androidx.junit)
     androidTestImplementation(libs.androidx.espresso.core)
 
+    implementation("com.google.android.material:1.2.0")
+
     // Barcode scanning API
     implementation (libs.barcode.scanning)
 // CameraX library

app/src/main/AndroidManifest.xml

@@ -37,7 +37,7 @@
 
         <provider
                 android:name="androidx.core.content.FileProvider"
-                android:authorities="com.google.firebase.components.activities.StorageActivity.provider;com.google.firebase.components.activities.FullscreenActivity.provider;com.google.firebase.components.activities.AddProductActivity.provider"
+                android:authorities="com.google.firebase.components.activities.MainActivity.provider;com.google.firebase.components.activities.FullscreenActivity.provider;com.google.firebase.components.activities.AddProductActivity.provider"
                 android:exported="false"
                 android:grantUriPermissions="true">
             <meta-data
@@ -51,7 +51,7 @@
         </meta-data>
 
         <activity
-                android:name=".activities.StorageActivity"
+                android:name=".activities.MainActivity"
                 android:exported="true"
                 android:theme="@style/Theme.BarcodeScannerForEmployees">
             <intent-filter>

app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/MainActivity.kt

@@ -19,7 +19,7 @@ import org.foxarmy.barcodescannerforemployees.databinding.ActivityStorageBinding
 import org.foxarmy.barcodescannerforemployees.fragments.StorageFragment
 import org.foxarmy.barcodescannerforemployees.views.AbstractProductView
 
-class StorageActivity : AppCompatActivity() {
+class MainActivity : AppCompatActivity() {
 
     private lateinit var appBarConfiguration: AppBarConfiguration
     private lateinit var binding: ActivityStorageBinding

app/src/main/java/org/foxarmy/barcodescannerforemployees/fragments/CategoriesFragment.kt

@@ -0,0 +1,70 @@
+package org.foxarmy.barcodescannerforemployees.fragments
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.fragment.app.Fragment
+import org.foxarmy.barcodescannerforemployees.R
+
+class CategoriesFragment : Fragment() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        // Inflate the layout for this fragment
+        return inflater.inflate(R.layout.fragment_categories, container, false)
+    }
+
+    override fun onResume() {
+        super.onResume()
+
+//        updateContent()
+    }
+
+//    public fun updateContent() {
+//
+//        val grv = getView()?.findViewById<GridLayout>(R.id.contentGridLayout)
+//        grv?.removeAllViews()
+//
+//        val db = DBStorageController(requireContext()).readableDatabase
+//        val projection = arrayOf(
+//            BaseColumns._ID,
+//            ProductContract.ProductEntry.PRODUCT_NAME,
+//            ProductContract.ProductEntry.PRODUCT_NET_WEIGHT,
+//            ProductContract.ProductEntry.IMAGE_FILENAME
+//        )
+//
+//        val cursor = db.query(ProductContract.ProductEntry.TABLE_NAME, projection, null, null, null, null, null)
+//
+//        with (cursor) {
+//            while(moveToNext()) {
+//                val productId = getInt(getColumnIndexOrThrow(BaseColumns._ID))
+//                val productName = getString(getColumnIndexOrThrow(ProductContract.ProductEntry.PRODUCT_NAME))
+//                val netWeight = getDouble(getColumnIndexOrThrow(ProductContract.ProductEntry.PRODUCT_NET_WEIGHT))
+//                val productImageHash = getString(getColumnIndexOrThrow(ProductContract.ProductEntry.IMAGE_FILENAME))
+//
+//                val product = AbstractProduct(productId, productName, netWeight, productImageHash, 1)
+//
+//                generateThumbnailForImage(context!!, productImageHash)
+//
+//                val abstractProduct = AbstractProductView(
+//                    requireActivity(),
+//                    requireContext(),
+//                    product
+//                )
+//                grv?.addView(abstractProduct)
+//            }
+//        }
+//    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+//        updateContent()
+    }
+}

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

@@ -6,7 +6,7 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:fitsSystemWindows="true"
-        tools:context=".activities.StorageActivity">
+        tools:context=".activities.MainActivity">
 
     <androidx.constraintlayout.widget.ConstraintLayout
             android:layout_width="match_parent"

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

@@ -16,5 +16,5 @@
             app:layout_constraintTop_toTopOf="parent"
             app:layout_constraintBottom_toBottomOf="parent"
             app:defaultNavHost="true"
-            app:navGraph="@navigation/nav_graph_storage"/>
+            app:navGraph="@navigation/nav_graph_main"/>
 </androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout 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="match_parent"
+             android:id="@+id/fragment_storage"
+             tools:context=".fragments.CategoriesFragment">
+    <ScrollView
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:id="@+id/categoriesLayout">
+    </ScrollView>
+</FrameLayout>

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

@@ -1,7 +1,7 @@
 <menu 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"
-      tools:context="org.foxarmy.barcodescannerforemployees.activities.StorageActivity">
+      tools:context="org.foxarmy.barcodescannerforemployees.activities.MainActivity">
     <item android:id="@+id/action_settings"
           android:title="@string/action_settings"
           android:orderInCategory="100"