add all arecontentsame

app/src/main/java/org/oppia/android/app/player/state/StateFragmentPresenter.kt

@@ -469,7 +469,9 @@ class StateFragmentPresenter @Inject constructor(
       if (x.viewType != y.viewType) {
         return false
       }
-      x.areContentsTheSame(y)
+      val same = x.areContentsTheSame(y)
+      Log.d("testhint",same.toString())
+      return same
     }
   }
 

app/src/main/java/org/oppia/android/app/player/state/itemviewmodel/ContinueInteractionViewModel.kt

@@ -47,6 +47,18 @@ class ContinueInteractionViewModel private constructor(
     interactionAnswerReceiver.onAnswerReadyForSubmission(getPendingAnswer())
   }
 
+  //subha hint
+  //approach 2 github
+  override fun areContentsTheSame(other: StateItemViewModel): Boolean {
+    if (this === other) return true
+    if (other !is ContinueInteractionViewModel) return false
+    return hasPreviousButton == other.hasConversationView &&
+      hasConversationView == other.hasConversationView &&
+      isSplitView == other.isSplitView &&
+      shouldAnimateContinueButton == other.shouldAnimateContinueButton &&
+      continueButtonAnimationTimestampMs == other.continueButtonAnimationTimestampMs
+  }
+
   /** Implementation of [StateItemViewModel.InteractionItemFactory] for this view model. */
   class FactoryImpl @Inject constructor(private val fragment: Fragment) : InteractionItemFactory {
     override fun create(

app/src/main/java/org/oppia/android/app/player/state/itemviewmodel/ContinueNavigationButtonViewModel.kt

@@ -17,4 +17,17 @@ class ContinueNavigationButtonViewModel(
   val isSplitView: Boolean,
   val shouldAnimateContinueButton: Boolean,
   val continueButtonAnimationTimestampMs: Long
-) : StateItemViewModel(ViewType.CONTINUE_NAVIGATION_BUTTON)
+) : StateItemViewModel(ViewType.CONTINUE_NAVIGATION_BUTTON) {
+
+  //subha hint
+  //approach 2 github
+  override fun areContentsTheSame(other: StateItemViewModel): Boolean {
+    if (this === other) return true
+    if (other !is ContinueNavigationButtonViewModel) return false
+    return hasPreviousButton == other.hasConversationView &&
+      shouldAnimateContinueButton == other.shouldAnimateContinueButton &&
+      hasConversationView == other.hasConversationView &&
+      isSplitView == other.isSplitView &&
+      continueButtonAnimationTimestampMs == other.continueButtonAnimationTimestampMs
+  }
+}

app/src/main/java/org/oppia/android/app/player/state/itemviewmodel/FeedbackViewModel.kt

@@ -7,4 +7,17 @@ class FeedbackViewModel(
   val hasConversationView: Boolean,
   val isSplitView: Boolean,
   val supportsConceptCards: Boolean
-) : StateItemViewModel(ViewType.FEEDBACK)
+) : StateItemViewModel(ViewType.FEEDBACK) {
+
+  //subha hint
+  //approach 2 github
+  override fun areContentsTheSame(other: StateItemViewModel): Boolean {
+    if (this === other) return true
+    if (other !is FeedbackViewModel) return false
+    return htmlContent == other.htmlContent &&
+      gcsEntityId == other.gcsEntityId &&
+      hasConversationView == other.hasConversationView &&
+      isSplitView == other.isSplitView &&
+      supportsConceptCards == other.supportsConceptCards
+  }
+}

app/src/main/java/org/oppia/android/app/player/state/itemviewmodel/NextButtonViewModel.kt

@@ -10,4 +10,15 @@ class NextButtonViewModel(
   val previousNavigationButtonListener: PreviousNavigationButtonListener,
   val nextNavigationButtonListener: NextNavigationButtonListener,
   val isSplitView: Boolean
-) : StateItemViewModel(ViewType.NEXT_NAVIGATION_BUTTON)
+) : StateItemViewModel(ViewType.NEXT_NAVIGATION_BUTTON) {
+
+  //subha hint
+  //approach 2 github
+  override fun areContentsTheSame(other: StateItemViewModel): Boolean {
+    if (this === other) return true
+    if (other !is NextButtonViewModel) return false
+    return hasConversationView == other.hasConversationView &&
+      isSplitView == other.isSplitView &&
+      hasPreviousButton == other.hasPreviousButton
+  }
+}

app/src/main/java/org/oppia/android/app/player/state/itemviewmodel/PreviousButtonViewModel.kt

@@ -10,4 +10,14 @@ class PreviousButtonViewModel(
   val hasConversationView: Boolean,
   val previousNavigationButtonListener: PreviousNavigationButtonListener,
   val isSplitView: Boolean
-) : StateItemViewModel(ViewType.PREVIOUS_NAVIGATION_BUTTON)
+) : StateItemViewModel(ViewType.PREVIOUS_NAVIGATION_BUTTON) {
+
+  //subha hint
+  //approach 2 github
+  override fun areContentsTheSame(other: StateItemViewModel): Boolean {
+    if (this === other) return true
+    if (other !is PreviousButtonViewModel) return false
+    return hasConversationView == other.hasConversationView &&
+      isSplitView == other.isSplitView
+  }
+}

app/src/main/java/org/oppia/android/app/player/state/itemviewmodel/ReplayButtonViewModel.kt

@@ -7,4 +7,14 @@ class ReplayButtonViewModel(
   val hasConversationView: Boolean,
   val replayButtonListener: ReplayButtonListener,
   val isSplitView: Boolean
-) : StateItemViewModel(ViewType.REPLAY_NAVIGATION_BUTTON)
+) : StateItemViewModel(ViewType.REPLAY_NAVIGATION_BUTTON) {
+
+  //subha hint
+  //approach 2 github
+  override fun areContentsTheSame(other: StateItemViewModel): Boolean {
+    if (this === other) return true
+    if (other !is ReplayButtonViewModel) return false
+    return hasConversationView == other.hasConversationView &&
+      isSplitView == other.isSplitView
+  }
+}

app/src/main/java/org/oppia/android/app/player/state/itemviewmodel/ReturnToTopicButtonViewModel.kt

@@ -10,4 +10,15 @@ class ReturnToTopicButtonViewModel(
   val previousNavigationButtonListener: PreviousNavigationButtonListener,
   val returnToTopicNavigationButtonListener: ReturnToTopicNavigationButtonListener,
   val isSplitView: Boolean
-) : StateItemViewModel(ViewType.RETURN_TO_TOPIC_NAVIGATION_BUTTON)
+) : StateItemViewModel(ViewType.RETURN_TO_TOPIC_NAVIGATION_BUTTON) {
+
+  //subha hint
+  //approach 2 github
+  override fun areContentsTheSame(other: StateItemViewModel): Boolean {
+    if (this === other) return true
+    if (other !is ReturnToTopicButtonViewModel) return false
+    return hasPreviousButton == other.hasConversationView &&
+      hasConversationView == other.hasConversationView &&
+      isSplitView == other.isSplitView
+  }
+}

app/src/main/java/org/oppia/android/app/player/state/itemviewmodel/SubmittedAnswerViewModel.kt

@@ -68,4 +68,19 @@ class SubmittedAnswerViewModel(
     private const val DEFAULT_SUBMITTED_ANSWER = ""
     private val DEFAULT_ACCESSIBLE_ANSWER: String? = null
   }
+
+  //subha hint
+  //approach 2 github
+  override fun areContentsTheSame(other: StateItemViewModel): Boolean {
+    if (this === other) return true
+    if (other !is SubmittedAnswerViewModel) return false
+    return (
+      isCorrectAnswer == other.isCorrectAnswer &&
+        submittedAnswer == other.submittedAnswer &&
+        isExtraInteractionAnswerCorrect.get() == other.isExtraInteractionAnswerCorrect.get() &&
+        submittedAnswerContentDescription.get() == other.submittedAnswerContentDescription.get() &&
+        isSplitView == other.isSplitView &&
+        hasConversationView == other.hasConversationView
+      )
+  }
 }