View model2

app/src/main/java/edu/temple/dicethrow/DieFragment.kt

@@ -6,23 +6,32 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.widget.TextView
+import androidx.lifecycle.ViewModelProvider
 import kotlin.random.Random
 
 class DieFragment : Fragment() {
 
     val DIESIDE = "sidenumber"
 
+    val PREVOUS_ROLL = "previousroll"
+
+    var currentRoll = 0
+
     lateinit var dieTextView: TextView
 
     var dieSides: Int = 6
 
+    lateinit var dieViewModel: DieViewModel
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         arguments?.let {
             it.getInt(DIESIDE).run {
                 dieSides = this
             }
         }
+
+        dieViewModel = ViewModelProvider(this).get(DieViewModel::class.java)
     }
 
     override fun onCreateView(
@@ -37,13 +46,18 @@ class DieFragment : Fragment() {
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
-        throwDie()
-        view.setOnClickListener{
-            throwDie()
+
+        dieViewModel.getCurrentRoll().observe(viewLifecycleOwner){
+            dieTextView.text = it.toString()
         }
+
+        if (dieViewModel.getCurrentRoll().value)
+            throwDie()
     }
 
+
     fun throwDie() {
-        dieTextView.text = Random.nextInt(dieSides).toString()
+        dieViewModel.setCurrentRoll(Random.nextInt(dieSides) + 1)
+
     }
 }

app/src/main/java/edu/temple/dicethrow/DieViewModel.kt

@@ -0,0 +1,27 @@
+package edu.temple.dicethrow
+
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.LiveData
+import kotlin.random.Random
+
+class DieViewModel : ViewModel() {
+
+    private var dieSides: Int = 6
+
+    private val currentRoll : MutableLiveData<Int> by lazy {
+        MutableLiveData()
+    }
+
+    fun getCurrentRoll() : LiveData<Int> {
+        return currentRoll
+    }
+
+    fun setCurrentRoll(roll : Int) {
+        currentRoll.value = roll
+    }
+
+    fun rollDie() {
+        setCurrentRoll(Random.nextInt(dieSides) + 1)
+    }
+}

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

@@ -1,6 +1,7 @@
 package edu.temple.dicethrow
 
 import android.os.Bundle
+import android.widget.Button
 import androidx.activity.enableEdgeToEdge
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.view.ViewCompat
@@ -10,5 +11,11 @@ class MainActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
+
+
+        findViewById<Button>(R.id.rollDiceButton).setOnClickListener {
+            (supportFragmentManager
+                .findFragmentById(R.id.fragmentContainerView) as DieFragment).throwDie()
+        }
     }
 }