1 files changed, 35 insertions, 1 deletions
diff --git a/quickstep/src/com/android/quickstep/interaction/TutorialFragment.java b/quickstep/src/com/android/quickstep/interaction/TutorialFragment.java
index a28cf58c35..c91ee81067 100644
--- a/quickstep/src/com/android/quickstep/interaction/TutorialFragment.java
+++ b/quickstep/src/com/android/quickstep/interaction/TutorialFragment.java
@@ -25,6 +25,7 @@ import static com.android.quickstep.interaction.GestureSandboxActivity.KEY_USE_T
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.app.Activity;
+import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.graphics.Insets;
@@ -84,6 +85,9 @@ abstract class TutorialFragment extends GestureSandboxFragment implements OnTouc
     private DeviceProfile mDeviceProfile;
     private boolean mIsLargeScreen;
     private boolean mIsFoldable;
+    private boolean mOnAttachedToWindowPendingCreate;
+
+    @Nullable private Runnable mOnAttachedOnGlobalLayoutCallback = null;
 
     public static TutorialFragment newInstance(
             TutorialType tutorialType, boolean gestureComplete, boolean fromTutorialMenu) {
@@ -174,6 +178,11 @@ abstract class TutorialFragment extends GestureSandboxFragment implements OnTouc
                 .getDeviceProfile(getContext());
         mIsLargeScreen = mDeviceProfile.isTablet;
         mIsFoldable = mDeviceProfile.isTwoPanels;
+
+        if (mOnAttachedToWindowPendingCreate) {
+            mOnAttachedToWindowPendingCreate = false;
+            onAttachedToWindow();
+        }
     }
 
     public boolean isLargeScreen() {
@@ -343,13 +352,27 @@ abstract class TutorialFragment extends GestureSandboxFragment implements OnTouc
                     new ViewTreeObserver.OnGlobalLayoutListener() {
                         @Override
                         public void onGlobalLayout() {
-                            changeController(mTutorialType);
+                            runOnAttached(() -> changeController(mTutorialType));
                             mRootView.getViewTreeObserver().removeOnGlobalLayoutListener(this);
                         }
                     });
         }
     }
 
+    private void runOnAttached(Runnable callback) {
+        mOnAttachedOnGlobalLayoutCallback = callback;
+        if (getContext() != null) {
+            onAttached();
+        }
+    }
+
+    private void onAttached() {
+        if (mOnAttachedOnGlobalLayoutCallback != null) {
+            mOnAttachedOnGlobalLayoutCallback.run();
+            mOnAttachedOnGlobalLayoutCallback = null;
+        }
+    }
+
     @Override
     public boolean onTouch(View view, MotionEvent motionEvent) {
         if (mTutorialController != null && !isGestureComplete()) {
@@ -372,7 +395,17 @@ abstract class TutorialFragment extends GestureSandboxFragment implements OnTouc
     }
 
     @Override
+    public void onAttach(@NonNull Context context) {
+        super.onAttach(context);
+        onAttached();
+    }
+
+    @Override
     void onAttachedToWindow() {
+        if (mEdgeBackGestureHandler == null) {
+            mOnAttachedToWindowPendingCreate = true;
+            return;
+        }
         StatsLogManager statsLogManager = getStatsLogManager();
         if (statsLogManager != null) {
             logTutorialStepShown(statsLogManager);
@@ -382,6 +415,7 @@ abstract class TutorialFragment extends GestureSandboxFragment implements OnTouc
 
     @Override
     void onDetachedFromWindow() {
+        mOnAttachedToWindowPendingCreate = false;
         mEdgeBackGestureHandler.setViewGroupParent(null);
     }