Autofrag instance

app/src/main/java/edu/temple/inclassactivity/ImageDisplayFragment.kt

@@ -18,6 +18,12 @@ class ImageDisplayFragment : Fragment() {
 
     private lateinit var images: IntArray
 
+
+    fun setImages(_images : IntArray){
+        images = _images
+    }
+
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         // If we have arguments
@@ -40,7 +46,9 @@ class ImageDisplayFragment : Fragment() {
         // The recycler view is the root element of the Fragment's layout
         // as such the view argument passed to onViewCreated() is the RecyclerView
         with (view as RecyclerView) {
-            adapter = CustomRecyclerAdapter(images)
+            if (::images.isInitialized) {
+                adapter = CustomRecyclerAdapter(images)
+            }
             layoutManager = GridLayoutManager(requireContext(), 2)
         }
     }

app/src/main/java/edu/temple/inclassactivity/MainActivity.kt

@@ -2,18 +2,73 @@ package edu.temple.inclassactivity
 
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import android.view.View
+import android.widget.Button
+import android.widget.Toast
+import androidx.recyclerview.widget.RecyclerView
+import androidx.lifecycle.ViewModelProvider as ViewModelProvider
+import androidx.lifecycle.ViewModelProvider as ViewModelProvider1
 
 class MainActivity : AppCompatActivity() {
+
+    lateinit var someVar : Array<Int>
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
 
+
+        //if(::someVar.isInitialized)
+
+
+        //val mainViewModel = ViewModelProvider(this)[MainViewModel::class.java]
+
+
         // Fetch images into IntArray called imageArray
         val typedArray = resources.obtainTypedArray(R.array.image_ids)
         val imageArray = IntArray(typedArray.length()) {typedArray.getResourceId(it, 0)}
         typedArray.recycle()
 
+        val myButton = findViewById<Button>(R.id.button)
+
+//        (supportFragmentManager.findFragmentById(R.id.fragmentContainerView) as ImageDisplayFragment).setImages(imageArray)
+
+        myButton.setOnClickListener{
+            (supportFragmentManager.findFragmentById(R.id.fragmentContainerView) as ImageDisplayFragment).setImages(imageArray)
+        }
+
+
+
+
         // Attach an instance of ImageDisplayFragment using factory method
+        //val fragment = ImageDisplayFragment.newInstance(imageArray)
+//
+
+//        if (supportFragmentManager.findFragmentById(R.id.fragmentContainerView) !is ImageDisplayFragment) {
+//            supportFragmentManager
+//                .beginTransaction()
+//                .add(R.id.fragmentContainerView, ImageDisplayFragment())
+//                .addToBackStack(null)
+//                .setReorderingAllowed(true)
+//                .commit()
+//        }
+
+
+
+
 
+
+
+    }
+
+    fun imageSelected(itemId : Int){
+        Toast.makeText(this,"You selected $itemId", Toast.LENGTH_SHORT).show()
     }
+
+//    fun setImages(_images : IntArray){
+//        images = _images
+//
+//        (view as RecyclerView).adapter = CustomRecyclerAdapter(images)
+//    }
+
 }

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

@@ -5,4 +5,26 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     tools:context=".MainActivity">
-</androidx.constraintlayout.widget.ConstraintLayout>
+
+    <androidx.fragment.app.FragmentContainerView
+        android:id="@+id/fragmentContainerView"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        app:layout_constraintBottom_toTopOf="@+id/button"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <Button
+        android:id="@+id/button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="68dp"
+        android:text="Button"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.498"
+        app:layout_constraintStart_toStartOf="parent" />
+</androidx.constraintlayout.widget.ConstraintLayout>
+
+    <!--        android:name="edu.temple.inclassactivity.ImageDisplayFragment"-->