diff --git a/core/java/android/view/accessibility/MagnificationAnimationCallback.java b/core/java/android/view/accessibility/MagnificationAnimationCallback.java
index 72518db..1755497 100644
--- a/core/java/android/view/accessibility/MagnificationAnimationCallback.java
+++ b/core/java/android/view/accessibility/MagnificationAnimationCallback.java
@@ -16,6 +16,8 @@
 
 package android.view.accessibility;
 
+import android.view.MagnificationSpec;
+
 /**
  * A callback for magnification animation result.
  * @hide
@@ -31,4 +33,16 @@
      *                change. Otherwise {@code false}
      */
     void onResult(boolean success);
+
+    /**
+     * Called when the animation is finished or interrupted during animating.
+     *
+     * @param success {@code true} if animating successfully with given spec or the spec did not
+     *                change. Otherwise {@code false}
+     * @param lastSpecSent the last spec that was sent to WindowManager for animation, in case you
+     *                     need to update the local copy
+     */
+    default void onResult(boolean success, MagnificationSpec lastSpecSent) {
+        onResult(success);
+    }
 }
\ No newline at end of file
diff --git a/services/accessibility/accessibility.aconfig b/services/accessibility/accessibility.aconfig
index 44682e2..f902439 100644
--- a/services/accessibility/accessibility.aconfig
+++ b/services/accessibility/accessibility.aconfig
@@ -52,6 +52,13 @@
 }
 
 flag {
+    name: "fullscreen_fling_gesture"
+    namespace: "accessibility"
+    description: "When true, adds a fling gesture animation for fullscreen magnification"
+    bug: "319175022"
+}
+
+flag {
     name: "pinch_zoom_zero_min_span"
     namespace: "accessibility"
     description: "Whether to set min span of ScaleGestureDetector to zero."
diff --git a/services/accessibility/java/com/android/server/accessibility/magnification/FullScreenMagnificationController.java b/services/accessibility/java/com/android/server/accessibility/magnification/FullScreenMagnificationController.java
index 805f6e3..a73f88b 100644
--- a/services/accessibility/java/com/android/server/accessibility/magnification/FullScreenMagnificationController.java
+++ b/services/accessibility/java/com/android/server/accessibility/magnification/FullScreenMagnificationController.java
@@ -25,7 +25,9 @@
 
 import android.accessibilityservice.MagnificationConfig;
 import android.animation.Animator;
+import android.animation.TimeAnimator;
 import android.animation.ValueAnimator;
+import android.annotation.MainThread;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.content.BroadcastReceiver;
@@ -51,6 +53,7 @@
 import android.view.WindowManager;
 import android.view.accessibility.MagnificationAnimationCallback;
 import android.view.animation.DecelerateInterpolator;
+import android.widget.Scroller;
 
 import com.android.internal.R;
 import com.android.internal.accessibility.common.MagnificationConstants;
@@ -60,6 +63,7 @@
 import com.android.server.LocalServices;
 import com.android.server.accessibility.AccessibilityManagerService;
 import com.android.server.accessibility.AccessibilityTraceManager;
+import com.android.server.accessibility.Flags;
 import com.android.server.wm.WindowManagerInternal;
 
 import java.util.ArrayList;
@@ -86,6 +90,7 @@
     private static final boolean DEBUG_SET_MAGNIFICATION_SPEC = false;
 
     private final Object mLock;
+    private final Supplier<Scroller> mScrollerSupplier;
 
     private final ControllerContext mControllerCtx;
 
@@ -149,7 +154,8 @@
 
         DisplayMagnification(int displayId) {
             mDisplayId = displayId;
-            mSpecAnimationBridge = new SpecAnimationBridge(mControllerCtx, mLock, mDisplayId);
+            mSpecAnimationBridge =
+                    new SpecAnimationBridge(mControllerCtx, mLock, mDisplayId, mScrollerSupplier);
         }
 
         /**
@@ -406,6 +412,41 @@
             }
         }
 
+        void startFlingAnimation(
+                float xPixelsPerSecond,
+                float yPixelsPerSecond,
+                MagnificationAnimationCallback animationCallback
+        ) {
+            if (DEBUG) {
+                Slog.i(LOG_TAG,
+                        "startFlingAnimation(spec = " + xPixelsPerSecond + ", animationCallback = "
+                                + animationCallback + ")");
+            }
+            if (Thread.currentThread().getId() == mMainThreadId) {
+                mSpecAnimationBridge.startFlingAnimation(
+                        xPixelsPerSecond,
+                        yPixelsPerSecond,
+                        getMinOffsetXLocked(),
+                        getMaxOffsetXLocked(),
+                        getMinOffsetYLocked(),
+                        getMaxOffsetYLocked(),
+                        animationCallback);
+            } else {
+                final Message m =
+                        PooledLambda.obtainMessage(
+                                SpecAnimationBridge::startFlingAnimation,
+                                mSpecAnimationBridge,
+                                xPixelsPerSecond,
+                                yPixelsPerSecond,
+                                getMinOffsetXLocked(),
+                                getMaxOffsetXLocked(),
+                                getMinOffsetYLocked(),
+                                getMaxOffsetYLocked(),
+                                animationCallback);
+                mControllerCtx.getHandler().sendMessage(m);
+            }
+        }
+
         /**
          * Get the ID of the last service that changed the magnification spec.
          *
@@ -759,6 +800,49 @@
             sendSpecToAnimation(mCurrentMagnificationSpec, null);
         }
 
+        @GuardedBy("mLock")
+        void startFling(float xPixelsPerSecond, float yPixelsPerSecond, int id) {
+            if (!mRegistered) {
+                return;
+            }
+            if (!isActivated()) {
+                return;
+            }
+
+            if (id != INVALID_SERVICE_ID) {
+                mIdOfLastServiceToMagnify = id;
+            }
+
+            startFlingAnimation(
+                    xPixelsPerSecond,
+                    yPixelsPerSecond,
+                    new MagnificationAnimationCallback() {
+                        @Override
+                        public void onResult(boolean success) {
+                            // never called
+                        }
+
+                        @Override
+                        public void onResult(boolean success, MagnificationSpec lastSpecSent) {
+                            if (DEBUG) {
+                                Slog.i(
+                                        LOG_TAG,
+                                        "startFlingAnimation finished( "
+                                                + success
+                                                + " = "
+                                                + lastSpecSent.offsetX
+                                                + ", "
+                                                + lastSpecSent.offsetY
+                                                + ")");
+                            }
+                            synchronized (mLock) {
+                                mCurrentMagnificationSpec.setTo(lastSpecSent);
+                                onMagnificationChangedLocked();
+                            }
+                        }
+                    });
+        }
+
         boolean updateCurrentSpecWithOffsetsLocked(float nonNormOffsetX, float nonNormOffsetY) {
             if (DEBUG) {
                 Slog.i(LOG_TAG,
@@ -838,7 +922,8 @@
                 magnificationInfoChangedCallback,
                 scaleProvider,
                 /* thumbnailSupplier= */ null,
-                backgroundExecutor);
+                backgroundExecutor,
+                () -> new Scroller(context));
     }
 
     /** Constructor for tests */
@@ -849,9 +934,11 @@
             @NonNull MagnificationInfoChangedCallback magnificationInfoChangedCallback,
             @NonNull MagnificationScaleProvider scaleProvider,
             Supplier<MagnificationThumbnail> thumbnailSupplier,
-            @NonNull Executor backgroundExecutor) {
+            @NonNull Executor backgroundExecutor,
+            Supplier<Scroller> scrollerSupplier) {
         mControllerCtx = ctx;
         mLock = lock;
+        mScrollerSupplier = scrollerSupplier;
         mMainThreadId = mControllerCtx.getContext().getMainLooper().getThread().getId();
         mScreenStateObserver = new ScreenStateObserver(mControllerCtx.getContext(), this);
         addInfoChangedCallback(magnificationInfoChangedCallback);
@@ -1437,6 +1524,26 @@
     }
 
     /**
+     * Call after a pan ends, if the velocity has passed the threshold, to start a fling animation.
+     *
+     * @param displayId The logical display id.
+     * @param xPixelsPerSecond the velocity of the last pan gesture in the X direction, in current
+     *     screen pixels per second.
+     * @param yPixelsPerSecond the velocity of the last pan gesture in the Y direction, in current
+     *     screen pixels per second.
+     * @param id the ID of the service requesting the change
+     */
+    public void startFling(int displayId, float xPixelsPerSecond, float yPixelsPerSecond, int id) {
+        synchronized (mLock) {
+            final DisplayMagnification display = mDisplays.get(displayId);
+            if (display == null) {
+                return;
+            }
+            display.startFling(xPixelsPerSecond, yPixelsPerSecond, id);
+        }
+    }
+
+    /**
      * Get the ID of the last service that changed the magnification spec.
      *
      * @param displayId The logical display id.
@@ -1698,7 +1805,14 @@
         @GuardedBy("mLock")
         private boolean mEnabled = false;
 
-        private SpecAnimationBridge(ControllerContext ctx, Object lock, int displayId) {
+        private final Scroller mScroller;
+        private final TimeAnimator mScrollAnimator = new TimeAnimator();
+
+        private SpecAnimationBridge(
+                ControllerContext ctx,
+                Object lock,
+                int displayId,
+                Supplier<Scroller> scrollerSupplier) {
             mControllerCtx = ctx;
             mLock = lock;
             mDisplayId = displayId;
@@ -1709,6 +1823,35 @@
             mValueAnimator.setFloatValues(0.0f, 1.0f);
             mValueAnimator.addUpdateListener(this);
             mValueAnimator.addListener(this);
+
+            if (Flags.fullscreenFlingGesture()) {
+                mScroller = scrollerSupplier.get();
+                mScrollAnimator.addListener(this);
+                mScrollAnimator.setTimeListener(
+                        (animation, totalTime, deltaTime) -> {
+                            synchronized (mLock) {
+                                if (DEBUG) {
+                                    Slog.v(
+                                            LOG_TAG,
+                                            "onScrollAnimationUpdate: "
+                                                    + mEnabled + " : " + totalTime);
+                                }
+
+                                if (mEnabled) {
+                                    if (!mScroller.computeScrollOffset()) {
+                                        animation.end();
+                                        return;
+                                    }
+
+                                    mEndMagnificationSpec.offsetX = mScroller.getCurrX();
+                                    mEndMagnificationSpec.offsetY = mScroller.getCurrY();
+                                    setMagnificationSpecLocked(mEndMagnificationSpec);
+                                }
+                            }
+                        });
+            } else {
+                mScroller = null;
+            }
         }
 
         /**
@@ -1735,16 +1878,20 @@
             }
         }
 
-        void updateSentSpecMainThread(MagnificationSpec spec,
-                MagnificationAnimationCallback animationCallback) {
-            if (mValueAnimator.isRunning()) {
-                mValueAnimator.cancel();
-            }
+        @MainThread
+        void updateSentSpecMainThread(
+                MagnificationSpec spec, MagnificationAnimationCallback animationCallback) {
+            cancelAnimations();
 
             mAnimationCallback = animationCallback;
             // If the current and sent specs don't match, update the sent spec.
             synchronized (mLock) {
                 final boolean changed = !mSentMagnificationSpec.equals(spec);
+                if (DEBUG_SET_MAGNIFICATION_SPEC) {
+                    Slog.d(
+                            LOG_TAG,
+                            "updateSentSpecMainThread: " + mEnabled + " : changed: " + changed);
+                }
                 if (changed) {
                     if (mAnimationCallback != null) {
                         animateMagnificationSpecLocked(spec);
@@ -1757,12 +1904,13 @@
             }
         }
 
+        @MainThread
         private void sendEndCallbackMainThread(boolean success) {
             if (mAnimationCallback != null) {
                 if (DEBUG) {
                     Slog.d(LOG_TAG, "sendEndCallbackMainThread: " + success);
                 }
-                mAnimationCallback.onResult(success);
+                mAnimationCallback.onResult(success, mSentMagnificationSpec);
                 mAnimationCallback = null;
             }
         }
@@ -1830,6 +1978,72 @@
         public void onAnimationRepeat(Animator animation) {
 
         }
+
+        /**
+         * Call after a pan ends, if the velocity has passed the threshold, to start a fling
+         * animation.
+         */
+        @MainThread
+        public void startFlingAnimation(
+                float xPixelsPerSecond,
+                float yPixelsPerSecond,
+                float minX,
+                float maxX,
+                float minY,
+                float maxY,
+                MagnificationAnimationCallback animationCallback
+        ) {
+            if (!Flags.fullscreenFlingGesture()) {
+                return;
+            }
+            cancelAnimations();
+
+            mAnimationCallback = animationCallback;
+
+            // We use this as a temp object to send updates every animation frame, so make sure it
+            // matches the current spec before we start.
+            mEndMagnificationSpec.setTo(mSentMagnificationSpec);
+
+            if (DEBUG) {
+                Slog.d(LOG_TAG, "startFlingAnimation: "
+                        + "offsetX " + mSentMagnificationSpec.offsetX
+                        + "offsetY " + mSentMagnificationSpec.offsetY
+                        + "xPixelsPerSecond " + xPixelsPerSecond
+                        + "yPixelsPerSecond " + yPixelsPerSecond
+                        + "minX " + minX
+                        + "maxX " + maxX
+                        + "minY " + minY
+                        + "maxY " + maxY
+                );
+            }
+
+            mScroller.fling(
+                    (int) mSentMagnificationSpec.offsetX,
+                    (int) mSentMagnificationSpec.offsetY,
+                    (int) xPixelsPerSecond,
+                    (int) yPixelsPerSecond,
+                    (int) minX,
+                    (int) maxX,
+                    (int) minY,
+                    (int) maxY);
+
+            mScrollAnimator.start();
+        }
+
+        @MainThread
+        private void cancelAnimations() {
+            if (mValueAnimator.isRunning()) {
+                mValueAnimator.cancel();
+            }
+
+            if (!Flags.fullscreenFlingGesture()) {
+                return;
+            }
+            if (mScrollAnimator.isRunning()) {
+                mScrollAnimator.cancel();
+            }
+            mScroller.forceFinished(true);
+        }
     }
 
     private static class ScreenStateObserver extends BroadcastReceiver {
diff --git a/services/accessibility/java/com/android/server/accessibility/magnification/FullScreenMagnificationGestureHandler.java b/services/accessibility/java/com/android/server/accessibility/magnification/FullScreenMagnificationGestureHandler.java
index baae1d93..44a34ca 100644
--- a/services/accessibility/java/com/android/server/accessibility/magnification/FullScreenMagnificationGestureHandler.java
+++ b/services/accessibility/java/com/android/server/accessibility/magnification/FullScreenMagnificationGestureHandler.java
@@ -62,6 +62,7 @@
 import android.view.MotionEvent.PointerProperties;
 import android.view.ScaleGestureDetector;
 import android.view.ScaleGestureDetector.OnScaleGestureListener;
+import android.view.VelocityTracker;
 import android.view.ViewConfiguration;
 
 import com.android.internal.R;
@@ -174,6 +175,10 @@
 
     private final boolean mIsWatch;
 
+    @Nullable private VelocityTracker mVelocityTracker;
+    private final int mMinimumVelocity;
+    private final int mMaximumVelocity;
+
     public FullScreenMagnificationGestureHandler(@UiContext Context context,
             FullScreenMagnificationController fullScreenMagnificationController,
             AccessibilityTraceManager trace,
@@ -184,15 +189,25 @@
             @NonNull WindowMagnificationPromptController promptController,
             int displayId,
             FullScreenMagnificationVibrationHelper fullScreenMagnificationVibrationHelper) {
-        this(context, fullScreenMagnificationController, trace, callback,
-                detectSingleFingerTripleTap, detectTwoFingerTripleTap,
-                detectShortcutTrigger, promptController, displayId,
-                fullScreenMagnificationVibrationHelper, /* magnificationLogger= */ null);
+        this(
+                context,
+                fullScreenMagnificationController,
+                trace,
+                callback,
+                detectSingleFingerTripleTap,
+                detectTwoFingerTripleTap,
+                detectShortcutTrigger,
+                promptController,
+                displayId,
+                fullScreenMagnificationVibrationHelper,
+                /* magnificationLogger= */ null,
+                ViewConfiguration.get(context));
     }
 
     /** Constructor for tests. */
     @VisibleForTesting
-    FullScreenMagnificationGestureHandler(@UiContext Context context,
+    FullScreenMagnificationGestureHandler(
+            @UiContext Context context,
             FullScreenMagnificationController fullScreenMagnificationController,
             AccessibilityTraceManager trace,
             Callback callback,
@@ -202,7 +217,8 @@
             @NonNull WindowMagnificationPromptController promptController,
             int displayId,
             FullScreenMagnificationVibrationHelper fullScreenMagnificationVibrationHelper,
-            MagnificationLogger magnificationLogger) {
+            MagnificationLogger magnificationLogger,
+            ViewConfiguration viewConfiguration) {
         super(displayId, detectSingleFingerTripleTap, detectTwoFingerTripleTap,
                 detectShortcutTrigger, trace, callback);
         if (DEBUG_ALL) {
@@ -212,6 +228,15 @@
                             + ", detectTwoFingerTripleTap = " + detectTwoFingerTripleTap
                             + ", detectShortcutTrigger = " + detectShortcutTrigger + ")");
         }
+
+        if (Flags.fullscreenFlingGesture()) {
+            mMinimumVelocity = viewConfiguration.getScaledMinimumFlingVelocity();
+            mMaximumVelocity = viewConfiguration.getScaledMaximumFlingVelocity();
+        } else {
+            mMinimumVelocity = 0;
+            mMaximumVelocity = 0;
+        }
+
         mFullScreenMagnificationController = fullScreenMagnificationController;
         mMagnificationInfoChangedCallback =
                 new FullScreenMagnificationController.MagnificationInfoChangedCallback() {
@@ -501,6 +526,7 @@
                 }
                 persistScaleAndTransitionTo(mViewportDraggingState);
             } else if (action == ACTION_UP || action == ACTION_CANCEL) {
+                onPanningFinished(event);
                 // if feature flag is enabled, currently only true on watches
                 if (mIsSinglePanningEnabled) {
                     mOverscrollHandler.setScaleAndCenterToEdgeIfNeeded();
@@ -578,6 +604,7 @@
                 Slog.i(mLogTag, "Panned content by scrollX: " + distanceX
                         + " scrollY: " + distanceY);
             }
+            onPan(second);
             mFullScreenMagnificationController.offsetMagnifiedRegion(mDisplayId, distanceX,
                     distanceY, AccessibilityManagerService.MAGNIFICATION_GESTURE_HANDLER_ID);
             if (mIsSinglePanningEnabled) {
@@ -973,7 +1000,7 @@
                                     && overscrollState(event, mFirstPointerDownLocation)
                                     == OVERSCROLL_VERTICAL_EDGE) {
                                 transitionToDelegatingStateAndClear();
-                            }
+                            } // TODO(b/319537921): should there be an else here?
                             //Primary pointer is swiping, so transit to PanningScalingState
                             transitToPanningScalingStateAndClear();
                         } else if (mIsSinglePanningEnabled
@@ -982,7 +1009,7 @@
                             if (overscrollState(event, mFirstPointerDownLocation)
                                     == OVERSCROLL_VERTICAL_EDGE) {
                                 transitionToDelegatingStateAndClear();
-                            }
+                            } // TODO(b/319537921): should there be an else here?
                             transitToSinglePanningStateAndClear();
                         } else if (!mIsTwoFingerCountReached) {
                             // If it is a two-finger gesture, do not transition to the
@@ -1742,6 +1769,61 @@
         }
     }
 
+    /** Call during MOVE events for a panning gesture. */
+    private void onPan(MotionEvent event) {
+        if (!Flags.fullscreenFlingGesture()) {
+            return;
+        }
+
+        if (mVelocityTracker == null) {
+            mVelocityTracker = VelocityTracker.obtain();
+        }
+        mVelocityTracker.addMovement(event);
+    }
+
+    /**
+     * Call during UP events for a panning gesture, so we can detect a fling and play a physics-
+     * based fling animation.
+     */
+    private void onPanningFinished(MotionEvent event) {
+        if (!Flags.fullscreenFlingGesture()) {
+            return;
+        }
+
+        if (mVelocityTracker == null) {
+            Log.e(mLogTag, "onPanningFinished: mVelocityTracker is null");
+            return;
+        }
+        mVelocityTracker.addMovement(event);
+        mVelocityTracker.computeCurrentVelocity(/* units= */ 1000, mMaximumVelocity);
+
+        float xPixelsPerSecond = mVelocityTracker.getXVelocity();
+        float yPixelsPerSecond = mVelocityTracker.getYVelocity();
+
+        mVelocityTracker.recycle();
+        mVelocityTracker = null;
+
+        if (DEBUG_PANNING_SCALING) {
+            Slog.v(
+                    mLogTag,
+                    "onPanningFinished: pixelsPerSecond: "
+                            + xPixelsPerSecond
+                            + ", "
+                            + yPixelsPerSecond
+                            + " mMinimumVelocity: "
+                            + mMinimumVelocity);
+        }
+
+        if ((Math.abs(yPixelsPerSecond) > mMinimumVelocity)
+                || (Math.abs(xPixelsPerSecond) > mMinimumVelocity)) {
+            mFullScreenMagnificationController.startFling(
+                    mDisplayId,
+                    xPixelsPerSecond,
+                    yPixelsPerSecond,
+                    AccessibilityManagerService.MAGNIFICATION_GESTURE_HANDLER_ID);
+        }
+    }
+
     final class SinglePanningState extends SimpleOnGestureListener implements State {
 
 
@@ -1756,6 +1838,8 @@
             int action = event.getActionMasked();
             switch (action) {
                 case ACTION_UP:
+                    onPanningFinished(event);
+                    // fall-through!
                 case ACTION_CANCEL:
                     mOverscrollHandler.setScaleAndCenterToEdgeIfNeeded();
                     mOverscrollHandler.clearEdgeState();
@@ -1770,6 +1854,7 @@
             if (mCurrentState != mSinglePanningState) {
                 return true;
             }
+            onPan(second);
             mFullScreenMagnificationController.offsetMagnifiedRegion(
                     mDisplayId,
                     distanceX,
diff --git a/services/tests/servicestests/src/com/android/server/accessibility/magnification/FullScreenMagnificationControllerTest.java b/services/tests/servicestests/src/com/android/server/accessibility/magnification/FullScreenMagnificationControllerTest.java
index 52726ca..4e0a91b 100644
--- a/services/tests/servicestests/src/com/android/server/accessibility/magnification/FullScreenMagnificationControllerTest.java
+++ b/services/tests/servicestests/src/com/android/server/accessibility/magnification/FullScreenMagnificationControllerTest.java
@@ -57,6 +57,7 @@
 import android.view.DisplayInfo;
 import android.view.MagnificationSpec;
 import android.view.accessibility.MagnificationAnimationCallback;
+import android.widget.Scroller;
 
 import androidx.test.InstrumentationRegistry;
 import androidx.test.runner.AndroidJUnit4;
@@ -134,7 +135,8 @@
 
     @Before
     public void setUp() {
-        Looper looper = InstrumentationRegistry.getContext().getMainLooper();
+        Context realContext = InstrumentationRegistry.getContext();
+        Looper looper = realContext.getMainLooper();
         // Pretending ID of the Thread associated with looper as main thread ID in controller
         when(mMockContext.getMainLooper()).thenReturn(looper);
         when(mMockControllerCtx.getContext()).thenReturn(mMockContext);
@@ -168,7 +170,8 @@
                         mRequestObserver,
                         mScaleProvider,
                         () -> mMockThumbnail,
-                        ConcurrentUtils.DIRECT_EXECUTOR);
+                        ConcurrentUtils.DIRECT_EXECUTOR,
+                        () -> new Scroller(realContext));
     }
 
     @After
@@ -428,7 +431,7 @@
         mTargetAnimationListener.onAnimationUpdate(mMockValueAnimator);
         mStateListener.onAnimationEnd(mMockValueAnimator);
         verify(mMockWindowManager).setMagnificationSpec(eq(displayId), argThat(closeTo(endSpec)));
-        verify(mAnimationCallback).onResult(true);
+        verify(mAnimationCallback).onResult(eq(true), any());
     }
 
     @Test
@@ -451,7 +454,7 @@
         mMessageCapturingHandler.sendAllMessages();
 
         verify(mMockValueAnimator, never()).start();
-        verify(mAnimationCallback).onResult(true);
+        verify(mAnimationCallback).onResult(eq(true), any());
     }
 
     @Test
@@ -736,7 +739,7 @@
 
         verify(mRequestObserver, never()).onFullScreenMagnificationChanged(eq(displayId),
                 any(Region.class), any(MagnificationConfig.class));
-        verify(mAnimationCallback).onResult(true);
+        verify(mAnimationCallback).onResult(eq(true), any());
     }
 
     @Test
@@ -772,7 +775,7 @@
         mMessageCapturingHandler.sendAllMessages();
 
         // Verify expected actions.
-        verify(mAnimationCallback).onResult(false);
+        verify(mAnimationCallback).onResult(eq(false), any());
         verify(mMockValueAnimator).start();
         verify(mMockValueAnimator).cancel();
 
@@ -782,7 +785,7 @@
         mStateListener.onAnimationEnd(mMockValueAnimator);
 
         checkActivatedAndMagnifying(/* activated= */ false, /* magnifying= */ false, displayId);
-        verify(lastAnimationCallback).onResult(true);
+        verify(lastAnimationCallback).onResult(eq(true), any());
     }
 
     @Test
diff --git a/services/tests/servicestests/src/com/android/server/accessibility/magnification/FullScreenMagnificationGestureHandlerTest.java b/services/tests/servicestests/src/com/android/server/accessibility/magnification/FullScreenMagnificationGestureHandlerTest.java
index 2aa357c..187be8a 100644
--- a/services/tests/servicestests/src/com/android/server/accessibility/magnification/FullScreenMagnificationGestureHandlerTest.java
+++ b/services/tests/servicestests/src/com/android/server/accessibility/magnification/FullScreenMagnificationGestureHandlerTest.java
@@ -31,6 +31,7 @@
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 import static org.junit.Assume.assumeTrue;
+import static org.mockito.AdditionalMatchers.gt;
 import static org.mockito.ArgumentMatchers.anyBoolean;
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Matchers.any;
@@ -40,8 +41,10 @@
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.reset;
+import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyNoMoreInteractions;
 import static org.mockito.Mockito.when;
 
 import android.animation.ValueAnimator;
@@ -65,6 +68,7 @@
 import android.view.InputDevice;
 import android.view.MotionEvent;
 import android.view.ViewConfiguration;
+import android.widget.Scroller;
 
 import androidx.test.filters.FlakyTest;
 import androidx.test.runner.AndroidJUnit4;
@@ -79,6 +83,8 @@
 import com.android.server.testutils.TestHandler;
 import com.android.server.wm.WindowManagerInternal;
 
+import com.google.common.truth.Truth;
+
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Ignore;
@@ -186,6 +192,8 @@
     @Rule
     public final TestableContext mContext = new TestableContext(getInstrumentation().getContext());
 
+    private final Scroller mMockScroller = spy(new Scroller(mContext));
+
     private OffsettableClock mClock;
     private FullScreenMagnificationGestureHandler mMgh;
     private TestHandler mHandler;
@@ -218,18 +226,20 @@
         Settings.Secure.putFloatForUser(mContext.getContentResolver(),
                 Settings.Secure.ACCESSIBILITY_DISPLAY_MAGNIFICATION_SCALE, 2.0f,
                 UserHandle.USER_SYSTEM);
-        mFullScreenMagnificationController = new FullScreenMagnificationController(
-                mockController,
-                new Object(),
-                mMagnificationInfoChangedCallback,
-                new MagnificationScaleProvider(mContext),
-                () -> null,
-                ConcurrentUtils.DIRECT_EXECUTOR) {
-                @Override
-                public boolean magnificationRegionContains(int displayId, float x, float y) {
-                    return true;
-                }
-        };
+        mFullScreenMagnificationController =
+                new FullScreenMagnificationController(
+                        mockController,
+                        new Object(),
+                        mMagnificationInfoChangedCallback,
+                        new MagnificationScaleProvider(mContext),
+                        () -> null,
+                        ConcurrentUtils.DIRECT_EXECUTOR,
+                        () -> mMockScroller) {
+                    @Override
+                    public boolean magnificationRegionContains(int displayId, float x, float y) {
+                        return true;
+                    }
+                };
 
         doAnswer((Answer<Void>) invocationOnMock -> {
             Object[] args = invocationOnMock.getArguments();
@@ -263,11 +273,20 @@
     @NonNull
     private FullScreenMagnificationGestureHandler newInstance(boolean detectSingleFingerTripleTap,
             boolean detectTwoFingerTripleTap, boolean detectShortcutTrigger) {
-        FullScreenMagnificationGestureHandler h = new FullScreenMagnificationGestureHandler(
-                mContext, mFullScreenMagnificationController, mMockTraceManager, mMockCallback,
-                detectSingleFingerTripleTap, detectTwoFingerTripleTap, detectShortcutTrigger,
-                mWindowMagnificationPromptController, DISPLAY_0,
-                mMockFullScreenMagnificationVibrationHelper, mMockMagnificationLogger);
+        FullScreenMagnificationGestureHandler h =
+                new FullScreenMagnificationGestureHandler(
+                        mContext,
+                        mFullScreenMagnificationController,
+                        mMockTraceManager,
+                        mMockCallback,
+                        detectSingleFingerTripleTap,
+                        detectTwoFingerTripleTap,
+                        detectShortcutTrigger,
+                        mWindowMagnificationPromptController,
+                        DISPLAY_0,
+                        mMockFullScreenMagnificationVibrationHelper,
+                        mMockMagnificationLogger,
+                        ViewConfiguration.get(mContext));
         if (isWatch()) {
             h.setSinglePanningEnabled(true);
         } else {
@@ -972,6 +991,159 @@
     }
 
     @Test
+    public void singleFinger_testScrollAfterMagnified_startsFling() {
+        assumeTrue(mMgh.mIsSinglePanningEnabled);
+        goFromStateIdleTo(STATE_ACTIVATED);
+
+        swipeAndHold();
+        fastForward(20);
+        swipe(DEFAULT_POINT, new PointF(DEFAULT_X * 2, DEFAULT_Y * 2), /* durationMs= */ 20);
+
+        verify(mMockScroller).fling(
+                /* startX= */ anyInt(),
+                /* startY= */ anyInt(),
+                // The system fling velocity is configurable and hard to test across devices, so as
+                // long as there is some fling velocity, we are happy.
+                /* velocityX= */ gt(1000),
+                /* velocityY= */ gt(1000),
+                /* minX= */ anyInt(),
+                /* minY= */ anyInt(),
+                /* maxX= */ anyInt(),
+                /* maxY= */ anyInt()
+        );
+    }
+
+    @Test
+    @RequiresFlagsDisabled(Flags.FLAG_FULLSCREEN_FLING_GESTURE)
+    public void testTwoFingerPanDiagonalAfterMagnified_doesNotFlingXY()
+            throws InterruptedException {
+        goFromStateIdleTo(STATE_ACTIVATED);
+        PointF pointer1 = DEFAULT_POINT;
+        PointF pointer2 = new PointF(DEFAULT_X * 1.5f, DEFAULT_Y);
+
+        send(downEvent());
+        send(pointerEvent(ACTION_POINTER_DOWN, new PointF[]{pointer1, pointer2}, 1));
+
+        // first move triggers the panning state
+        pointer1.offset(100, 100);
+        pointer2.offset(100, 100);
+        fastForward(20);
+        send(pointerEvent(ACTION_MOVE, new PointF[]{pointer1, pointer2}, 0));
+
+        // second move actually pans
+        pointer1.offset(100, 100);
+        pointer2.offset(100, 100);
+        fastForward(20);
+        send(pointerEvent(ACTION_MOVE, new PointF[]{pointer1, pointer2}, 0));
+        pointer1.offset(100, 100);
+        pointer2.offset(100, 100);
+        fastForward(20);
+        send(pointerEvent(ACTION_MOVE, new PointF[]{pointer1, pointer2}, 0));
+
+        assertIn(STATE_PANNING);
+        mHandler.timeAdvance();
+        returnToNormalFrom(STATE_PANNING);
+
+        mHandler.timeAdvance();
+
+        verifyNoMoreInteractions(mMockScroller);
+    }
+
+    @Test
+    @RequiresFlagsEnabled(Flags.FLAG_FULLSCREEN_FLING_GESTURE)
+    public void testTwoFingerPanDiagonalAfterMagnified_startsFlingXY()
+            throws InterruptedException {
+        goFromStateIdleTo(STATE_ACTIVATED);
+        PointF pointer1 = DEFAULT_POINT;
+        PointF pointer2 = new PointF(DEFAULT_X * 1.5f, DEFAULT_Y);
+
+        send(downEvent());
+        send(pointerEvent(ACTION_POINTER_DOWN, new PointF[] {pointer1, pointer2}, 1));
+
+        // first move triggers the panning state
+        pointer1.offset(100, 100);
+        pointer2.offset(100, 100);
+        fastForward(20);
+        send(pointerEvent(ACTION_MOVE, new PointF[] {pointer1, pointer2}, 0));
+
+        // second move actually pans
+        pointer1.offset(100, 100);
+        pointer2.offset(100, 100);
+        fastForward(20);
+        send(pointerEvent(ACTION_MOVE, new PointF[] {pointer1, pointer2}, 0));
+        pointer1.offset(100, 100);
+        pointer2.offset(100, 100);
+        fastForward(20);
+        send(pointerEvent(ACTION_MOVE, new PointF[] {pointer1, pointer2}, 0));
+
+        assertIn(STATE_PANNING);
+        mHandler.timeAdvance();
+        returnToNormalFrom(STATE_PANNING);
+
+        mHandler.timeAdvance();
+
+        verify(mMockScroller).fling(
+                /* startX= */ anyInt(),
+                /* startY= */ anyInt(),
+                // The system fling velocity is configurable and hard to test across devices, so as
+                // long as there is some fling velocity, we are happy.
+                /* velocityX= */ gt(1000),
+                /* velocityY= */ gt(1000),
+                /* minX= */ anyInt(),
+                /* minY= */ anyInt(),
+                /* maxX= */ anyInt(),
+                /* maxY= */ anyInt()
+        );
+    }
+
+    @Test
+    @RequiresFlagsEnabled(Flags.FLAG_FULLSCREEN_FLING_GESTURE)
+    public void testTwoFingerPanRightAfterMagnified_startsFlingXOnly()
+            throws InterruptedException {
+        goFromStateIdleTo(STATE_ACTIVATED);
+        PointF pointer1 = DEFAULT_POINT;
+        PointF pointer2 = new PointF(DEFAULT_X * 1.5f, DEFAULT_Y);
+
+        send(downEvent());
+        send(pointerEvent(ACTION_POINTER_DOWN, new PointF[] {pointer1, pointer2}, 1));
+
+        // first move triggers the panning state
+        pointer1.offset(100, 0);
+        pointer2.offset(100, 0);
+        fastForward(20);
+        send(pointerEvent(ACTION_MOVE, new PointF[] {pointer1, pointer2}, 0));
+
+        // second move actually pans
+        pointer1.offset(100, 0);
+        pointer2.offset(100, 0);
+        fastForward(20);
+        send(pointerEvent(ACTION_MOVE, new PointF[] {pointer1, pointer2}, 0));
+        pointer1.offset(100, 0);
+        pointer2.offset(100, 0);
+        fastForward(20);
+        send(pointerEvent(ACTION_MOVE, new PointF[] {pointer1, pointer2}, 0));
+
+        assertIn(STATE_PANNING);
+        mHandler.timeAdvance();
+        returnToNormalFrom(STATE_PANNING);
+
+        mHandler.timeAdvance();
+
+        verify(mMockScroller).fling(
+                /* startX= */ anyInt(),
+                /* startY= */ anyInt(),
+                // The system fling velocity is configurable and hard to test across devices, so as
+                // long as there is some fling velocity, we are happy.
+                /* velocityX= */ gt(100),
+                /* velocityY= */ eq(0),
+                /* minX= */ anyInt(),
+                /* minY= */ anyInt(),
+                /* maxX= */ anyInt(),
+                /* maxY= */ anyInt()
+        );
+    }
+
+    @Test
     public void testShortcutTriggered_invokeShowWindowPromptAction() {
         goFromStateIdleTo(STATE_SHORTCUT_TRIGGERED);
 
@@ -1397,8 +1569,11 @@
         send(upEvent());
     }
 
-    private void swipe(PointF start, PointF end) {
-        swipeAndHold(start, end);
+    private void swipe(PointF start, PointF end, int durationMs) {
+        var mid = new PointF(start.x + (end.x - start.x) / 2f, start.y + (end.y - start.y) / 2f);
+        swipeAndHold(start, mid);
+        fastForward(durationMs);
+        send(moveEvent(end.x - start.x / 10f, end.y - start.y / 10f));
         send(upEvent(end.x, end.y));
     }
 
diff --git a/services/tests/servicestests/src/com/android/server/accessibility/magnification/MagnificationControllerTest.java b/services/tests/servicestests/src/com/android/server/accessibility/magnification/MagnificationControllerTest.java
index 28d07f9..9474484 100644
--- a/services/tests/servicestests/src/com/android/server/accessibility/magnification/MagnificationControllerTest.java
+++ b/services/tests/servicestests/src/com/android/server/accessibility/magnification/MagnificationControllerTest.java
@@ -59,6 +59,7 @@
 import android.view.DisplayInfo;
 import android.view.accessibility.IRemoteMagnificationAnimationCallback;
 import android.view.accessibility.MagnificationAnimationCallback;
+import android.widget.Scroller;
 
 import androidx.annotation.NonNull;
 import androidx.test.InstrumentationRegistry;
@@ -195,14 +196,16 @@
         LocalServices.removeServiceForTest(DisplayManagerInternal.class);
         LocalServices.addService(DisplayManagerInternal.class, mDisplayManagerInternal);
 
-        mScreenMagnificationController = spy(new FullScreenMagnificationController(
-                mControllerCtx,
-                new Object(),
-                mScreenMagnificationInfoChangedCallbackDelegate,
-                mScaleProvider,
-                () -> null,
-                ConcurrentUtils.DIRECT_EXECUTOR
-        ));
+        mScreenMagnificationController =
+                spy(
+                        new FullScreenMagnificationController(
+                                mControllerCtx,
+                                new Object(),
+                                mScreenMagnificationInfoChangedCallbackDelegate,
+                                mScaleProvider,
+                                () -> null,
+                                ConcurrentUtils.DIRECT_EXECUTOR,
+                                () -> new Scroller(mContext)));
         mScreenMagnificationController.register(TEST_DISPLAY);
 
         mMagnificationConnectionManager = spy(