Merge "Add accessibility support for Drag & Drop" into sc-v2-dev

core/java/android/view/IWindowSession.aidl

@@ -174,6 +174,11 @@ interface IWindowSession {
     IBinder performDrag(IWindow window, int flags, in SurfaceControl surface, int touchSource,
             float touchX, float touchY, float thumbCenterX, float thumbCenterY, in ClipData data);
 
+    /**
+     * Drops the content of the current drag operation for accessibility
+     */
+    boolean dropForAccessibility(IWindow window, int x, int y);
+
     /**
      * Report the result of a drop action targeted to the given window.
      * consumed is 'true' when the drop was accepted by a valid recipient,

core/java/android/view/View.java

@@ -3515,6 +3515,7 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
      *                    1             PFLAG4_ALLOW_CLICK_WHEN_DISABLED
      *                   1              PFLAG4_DETACHED
      *                  1               PFLAG4_HAS_TRANSLATION_TRANSIENT_STATE
+     *                 1                PFLAG4_DRAG_A11Y_STARTED
      * |-------|-------|-------|-------|
      */
 
@@ -3586,6 +3587,11 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
      */
     private static final int PFLAG4_HAS_TRANSLATION_TRANSIENT_STATE = 0x000004000;
 
+    /**
+     * Indicates that the view has started a drag with {@link AccessibilityAction#ACTION_DRAG_START}
+     */
+    private static final int PFLAG4_DRAG_A11Y_STARTED = 0x000008000;
+
     /* End of masks for mPrivateFlags4 */
 
     /** @hide */
@@ -10384,8 +10390,17 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
         if (mTouchDelegate != null) {
             info.setTouchDelegateInfo(mTouchDelegate.getTouchDelegateInfo());
         }
+
+        if (startedSystemDragForAccessibility()) {
+            info.addAction(AccessibilityAction.ACTION_DRAG_CANCEL);
+        }
+
+        if (canAcceptAccessibilityDrop()) {
+            info.addAction(AccessibilityAction.ACTION_DRAG_DROP);
+        }
     }
 
+
     /**
      * Adds extra data to an {@link AccessibilityNodeInfo} based on an explicit request for the
      * additional data.
@@ -14222,9 +14237,45 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
                 return true;
             }
         }
+
+        if (action == R.id.accessibilityActionDragDrop) {
+            if (!canAcceptAccessibilityDrop()) {
+                return false;
+            }
+            try {
+                if (mAttachInfo != null && mAttachInfo.mSession != null) {
+                    final int[] location = new int[2];
+                    getLocationInWindow(location);
+                    final int centerX = location[0] + getWidth() / 2;
+                    final int centerY = location[1] + getHeight() / 2;
+                    return mAttachInfo.mSession.dropForAccessibility(mAttachInfo.mWindow,
+                            centerX, centerY);
+                }
+            } catch (RemoteException e) {
+                Log.e(VIEW_LOG_TAG, "Unable to drop for accessibility", e);
+            }
+            return false;
+        } else if (action == R.id.accessibilityActionDragCancel) {
+            if (!startedSystemDragForAccessibility()) {
+                return false;
+            }
+            if (mAttachInfo != null && mAttachInfo.mDragToken != null) {
+                cancelDragAndDrop();
+                return true;
+            }
+            return false;
+        }
         return false;
     }
 
+    private boolean canAcceptAccessibilityDrop() {
+        if (!canAcceptDrag()) {
+            return false;
+        }
+        ListenerInfo li = mListenerInfo;
+        return (li != null) && (li.mOnDragListener != null || li.mOnReceiveContentListener != null);
+    }
+
     private boolean traverseAtGranularity(int granularity, boolean forward,
             boolean extendSelection) {
         CharSequence text = getIterableTextForAccessibility();
@@ -26664,6 +26715,37 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
             data.prepareToLeaveProcess((flags & View.DRAG_FLAG_GLOBAL) != 0);
         }
 
+        Rect bounds = new Rect();
+        getBoundsOnScreen(bounds, true);
+
+        Point lastTouchPoint = new Point();
+        mAttachInfo.mViewRootImpl.getLastTouchPoint(lastTouchPoint);
+        final ViewRootImpl root = mAttachInfo.mViewRootImpl;
+
+        // Skip surface logic since shadows and animation are not required during the a11y drag
+        final boolean a11yEnabled = AccessibilityManager.getInstance(mContext).isEnabled();
+        if (a11yEnabled && (flags & View.DRAG_FLAG_ACCESSIBILITY_ACTION) != 0) {
+            try {
+                IBinder token = mAttachInfo.mSession.performDrag(
+                        mAttachInfo.mWindow, flags, null,
+                        mAttachInfo.mViewRootImpl.getLastTouchSource(),
+                        0f, 0f, 0f, 0f, data);
+                if (ViewDebug.DEBUG_DRAG) {
+                    Log.d(VIEW_LOG_TAG, "startDragAndDrop via a11y action returned " + token);
+                }
+                if (token != null) {
+                    root.setLocalDragState(myLocalState);
+                    mAttachInfo.mDragToken = token;
+                    mAttachInfo.mViewRootImpl.setDragStartedViewForAccessibility(this);
+                    setAccessibilityDragStarted(true);
+                }
+                return token != null;
+            } catch (Exception e) {
+                Log.e(VIEW_LOG_TAG, "Unable to initiate a11y drag", e);
+                return false;
+            }
+        }
+
         Point shadowSize = new Point();
         Point shadowTouchPoint = new Point();
         shadowBuilder.onProvideShadowMetrics(shadowSize, shadowTouchPoint);
@@ -26688,7 +26770,6 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
                     + " shadowX=" + shadowTouchPoint.x + " shadowY=" + shadowTouchPoint.y);
         }
 
-        final ViewRootImpl root = mAttachInfo.mViewRootImpl;
         final SurfaceSession session = new SurfaceSession();
         final SurfaceControl surfaceControl = new SurfaceControl.Builder(session)
                 .setName("drag surface")
@@ -26711,12 +26792,9 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
                 surface.unlockCanvasAndPost(canvas);
             }
 
-            // repurpose 'shadowSize' for the last touch point
+            token = mAttachInfo.mSession.performDrag(mAttachInfo.mWindow, flags, surfaceControl,
-            root.getLastTouchPoint(shadowSize);
+                    root.getLastTouchSource(), lastTouchPoint.x, lastTouchPoint.y,
-
+                    shadowTouchPoint.x, shadowTouchPoint.y, data);
-            token = mAttachInfo.mSession.performDrag(
-                    mAttachInfo.mWindow, flags, surfaceControl, root.getLastTouchSource(),
-                    shadowSize.x, shadowSize.y, shadowTouchPoint.x, shadowTouchPoint.y, data);
             if (ViewDebug.DEBUG_DRAG) {
                 Log.d(VIEW_LOG_TAG, "performDrag returned " + token);
             }
@@ -26728,6 +26806,10 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
                 mAttachInfo.mDragToken = token;
                 // Cache the local state object for delivery with DragEvents
                 root.setLocalDragState(myLocalState);
+                if (a11yEnabled) {
+                    // Set for AccessibilityEvents
+                    mAttachInfo.mViewRootImpl.setDragStartedViewForAccessibility(this);
+                }
             }
             return token != null;
         } catch (Exception e) {
@@ -26741,6 +26823,24 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
         }
     }
 
+    void setAccessibilityDragStarted(boolean started) {
+        int pflags4 = mPrivateFlags4;
+        if (started) {
+            pflags4 |= PFLAG4_DRAG_A11Y_STARTED;
+        } else {
+            pflags4 &= ~PFLAG4_DRAG_A11Y_STARTED;
+        }
+
+        if (pflags4 != mPrivateFlags4) {
+            mPrivateFlags4 = pflags4;
+            sendWindowContentChangedAccessibilityEvent(CONTENT_CHANGE_TYPE_UNDEFINED);
+        }
+    }
+
+    private boolean startedSystemDragForAccessibility() {
+        return (mPrivateFlags4 & PFLAG4_DRAG_A11Y_STARTED) != 0;
+    }
+
     /**
      * Cancels an ongoing drag and drop operation.
      * <p>
@@ -26958,6 +27058,12 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
         }
 
         switch (event.mAction) {
+            case DragEvent.ACTION_DRAG_STARTED: {
+                if (result && li.mOnDragListener != null) {
+                    sendWindowContentChangedAccessibilityEvent(
+                            AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED);
+                }
+            } break;
             case DragEvent.ACTION_DRAG_ENTERED: {
                 mPrivateFlags2 |= View.PFLAG2_DRAG_HOVERED;
                 refreshDrawableState();
@@ -26966,7 +27072,15 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
                 mPrivateFlags2 &= ~View.PFLAG2_DRAG_HOVERED;
                 refreshDrawableState();
             } break;
+            case DragEvent.ACTION_DROP: {
+                if (result && (li.mOnDragListener != null | li.mOnReceiveContentListener != null)) {
+                    sendWindowContentChangedAccessibilityEvent(
+                            AccessibilityEvent.CONTENT_CHANGE_TYPE_DRAG_DROPPED);
+                }
+            } break;
             case DragEvent.ACTION_DRAG_ENDED: {
+                sendWindowContentChangedAccessibilityEvent(
+                        AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED);
                 mPrivateFlags2 &= ~View.DRAG_MASK;
                 refreshDrawableState();
             } break;
@@ -26979,6 +27093,15 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
         return (mPrivateFlags2 & PFLAG2_DRAG_CAN_ACCEPT) != 0;
     }
 
+    void sendWindowContentChangedAccessibilityEvent(int changeType) {
+        if (AccessibilityManager.getInstance(mContext).isEnabled()) {
+            AccessibilityEvent event = AccessibilityEvent.obtain();
+            event.setEventType(AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED);
+            event.setContentChangeTypes(changeType);
+            sendAccessibilityEventUnchecked(event);
+        }
+    }
+
     /**
      * This needs to be a better API (NOT ON VIEW) before it is exposed.  If
      * it is ever exposed at all.

core/java/android/view/ViewParent.java

@@ -412,6 +412,9 @@ public interface ViewParent {
      *            <li>{@link AccessibilityEvent#CONTENT_CHANGE_TYPE_SUBTREE}
      *            <li>{@link AccessibilityEvent#CONTENT_CHANGE_TYPE_TEXT}
      *            <li>{@link AccessibilityEvent#CONTENT_CHANGE_TYPE_UNDEFINED}
+     *            <li>{@link AccessibilityEvent#CONTENT_CHANGE_TYPE_DRAG_STARTED}
+     *            <li>{@link AccessibilityEvent#CONTENT_CHANGE_TYPE_DRAG_CANCELLED}
+     *            <li>{@link AccessibilityEvent#CONTENT_CHANGE_TYPE_DRAG_DROPPED}
      *            </ul>
      */
     public void notifySubtreeAccessibilityStateChanged(

core/java/android/view/ViewRootImpl.java

@@ -651,6 +651,7 @@ public final class ViewRootImpl implements ViewParent,
     /* Drag/drop */
     ClipDescription mDragDescription;
     View mCurrentDragView;
+    View mStartedDragViewForA11y;
     volatile Object mLocalDragState;
     final PointF mDragPoint = new PointF();
     final PointF mLastTouchPoint = new PointF();
@@ -7584,6 +7585,11 @@ public final class ViewRootImpl implements ViewParent,
             if (what == DragEvent.ACTION_DRAG_STARTED) {
                 mCurrentDragView = null;    // Start the current-recipient tracking
                 mDragDescription = event.mClipDescription;
+                if (mStartedDragViewForA11y != null) {
+                    // Send a drag started a11y event
+                    mStartedDragViewForA11y.sendWindowContentChangedAccessibilityEvent(
+                            AccessibilityEvent.CONTENT_CHANGE_TYPE_DRAG_STARTED);
+                }
             } else {
                 if (what == DragEvent.ACTION_DRAG_ENDED) {
                     mDragDescription = null;
@@ -7658,6 +7664,16 @@ public final class ViewRootImpl implements ViewParent,
 
                 // When the drag operation ends, reset drag-related state
                 if (what == DragEvent.ACTION_DRAG_ENDED) {
+                    if (mStartedDragViewForA11y != null) {
+                        // If the drag failed, send a cancelled event from the source. Otherwise,
+                        // the View that accepted the drop sends CONTENT_CHANGE_TYPE_DRAG_DROPPED
+                        if (!event.getResult()) {
+                            mStartedDragViewForA11y.sendWindowContentChangedAccessibilityEvent(
+                                    AccessibilityEvent.CONTENT_CHANGE_TYPE_DRAG_CANCELLED);
+                        }
+                        mStartedDragViewForA11y.setAccessibilityDragStarted(false);
+                    }
+                    mStartedDragViewForA11y = null;
                     mCurrentDragView = null;
                     setLocalDragState(null);
                     mAttachInfo.mDragToken = null;
@@ -7737,6 +7753,13 @@ public final class ViewRootImpl implements ViewParent,
         mCurrentDragView = newDragTarget;
     }
 
+    /** Sets the view that started drag and drop for the purpose of sending AccessibilityEvents */
+    void setDragStartedViewForAccessibility(View view) {
+        if (mStartedDragViewForA11y == null) {
+            mStartedDragViewForA11y = view;
+        }
+    }
+
     private AudioManager getAudioManager() {
         if (mView == null) {
             throw new IllegalStateException("getAudioManager called when there is no mView");

core/java/android/view/WindowlessWindowManager.java

@@ -498,4 +498,9 @@ public class WindowlessWindowManager implements IWindowSession {
     public void generateDisplayHash(IWindow window, Rect boundsInWindow, String hashAlgorithm,
             RemoteCallback callback) {
     }
+
+    @Override
+    public boolean dropForAccessibility(IWindow window, int x, int y) {
+        return false;
+    }
 }

services/core/java/com/android/server/wm/DragDropController.java

@@ -22,6 +22,7 @@ import static com.android.server.wm.WindowManagerDebugConfig.TAG_WM;
 
 import android.annotation.NonNull;
 import android.content.ClipData;
+import android.content.Context;
 import android.os.Binder;
 import android.os.Handler;
 import android.os.IBinder;
@@ -32,6 +33,7 @@ import android.view.Display;
 import android.view.IWindow;
 import android.view.SurfaceControl;
 import android.view.View;
+import android.view.accessibility.AccessibilityManager;
 
 import com.android.server.wm.WindowManagerInternal.IDragDropCallback;
 
@@ -43,7 +45,8 @@ import java.util.concurrent.atomic.AtomicReference;
  */
 class DragDropController {
     private static final float DRAG_SHADOW_ALPHA_TRANSPARENT = .7071f;
-    private static final long DRAG_TIMEOUT_MS = 5000;
+    static final long DRAG_TIMEOUT_MS = 5000;
+    private static final int A11Y_DRAG_TIMEOUT_DEFAULT_MS = 60000;
 
     // Messages for Handler.
     static final int MSG_DRAG_END_TIMEOUT = 0;
@@ -151,36 +154,48 @@ class DragDropController {
                     mDragState.mOriginalAlpha = alpha;
                     mDragState.mToken = dragToken;
                     mDragState.mDisplayContent = displayContent;
-
-                    final Display display = displayContent.getDisplay();
-                    if (!mCallback.get().registerInputChannel(
-                            mDragState, display, mService.mInputManager,
-                            callingWin.mInputChannel)) {
-                        Slog.e(TAG_WM, "Unable to transfer touch focus");
-                        return null;
-                    }
-
-                    final SurfaceControl surfaceControl = mDragState.mSurfaceControl;
                     mDragState.mData = data;
-                    mDragState.broadcastDragStartedLocked(touchX, touchY);
-                    mDragState.overridePointerIconLocked(touchSource);
-                    // remember the thumb offsets for later
-                    mDragState.mThumbOffsetX = thumbCenterX;
-                    mDragState.mThumbOffsetY = thumbCenterY;
 
-                    // Make the surface visible at the proper location
+                    if ((flags & View.DRAG_FLAG_ACCESSIBILITY_ACTION) == 0) {
-                    if (SHOW_LIGHT_TRANSACTIONS) Slog.i(TAG_WM, ">>> OPEN TRANSACTION performDrag");
+                        final Display display = displayContent.getDisplay();
+                        if (!mCallback.get().registerInputChannel(
+                                mDragState, display, mService.mInputManager,
+                                callingWin.mInputChannel)) {
+                            Slog.e(TAG_WM, "Unable to transfer touch focus");
+                            return null;
+                        }
 
-                    final SurfaceControl.Transaction transaction = mDragState.mTransaction;
+                        final SurfaceControl surfaceControl = mDragState.mSurfaceControl;
-                    transaction.setAlpha(surfaceControl, mDragState.mOriginalAlpha);
+                        mDragState.broadcastDragStartedLocked(touchX, touchY);
-                    transaction.setPosition(
+                        mDragState.overridePointerIconLocked(touchSource);
-                            surfaceControl, touchX - thumbCenterX, touchY - thumbCenterY);
+                        // remember the thumb offsets for later
-                    transaction.show(surfaceControl);
+                        mDragState.mThumbOffsetX = thumbCenterX;
-                    displayContent.reparentToOverlay(transaction, surfaceControl);
+                        mDragState.mThumbOffsetY = thumbCenterY;
-                    callingWin.scheduleAnimation();
 
-                    if (SHOW_LIGHT_TRANSACTIONS) {
+                        // Make the surface visible at the proper location
-                        Slog.i(TAG_WM, "<<< CLOSE TRANSACTION performDrag");
+                        if (SHOW_LIGHT_TRANSACTIONS) {
+                            Slog.i(TAG_WM, ">>> OPEN TRANSACTION performDrag");
+                        }
+
+                        final SurfaceControl.Transaction transaction = mDragState.mTransaction;
+                        transaction.setAlpha(surfaceControl, mDragState.mOriginalAlpha);
+                        transaction.setPosition(
+                                surfaceControl, touchX - thumbCenterX, touchY - thumbCenterY);
+                        transaction.show(surfaceControl);
+                        displayContent.reparentToOverlay(transaction, surfaceControl);
+                        callingWin.scheduleAnimation();
+                        if (SHOW_LIGHT_TRANSACTIONS) {
+                            Slog.i(TAG_WM, "<<< CLOSE TRANSACTION performDrag");
+                        }
+                    } else {
+                        // Skip surface logic for a drag triggered by an AccessibilityAction
+                        mDragState.broadcastDragStartedLocked(touchX, touchY);
+
+                        // Timeout for the user to drop the content
+                        sendTimeoutMessage(MSG_DRAG_END_TIMEOUT, callingWin.mClient.asBinder(),
+                                getAccessibilityManager().getRecommendedTimeoutMillis(
+                                        A11Y_DRAG_TIMEOUT_DEFAULT_MS,
+                                        AccessibilityManager.FLAG_CONTENT_CONTROLS));
                     }
                 } finally {
                     if (surface != null) {
@@ -309,10 +324,10 @@ class DragDropController {
     /**
      * Sends a timeout message to the Handler managed by DragDropController.
      */
-    void sendTimeoutMessage(int what, Object arg) {
+    void sendTimeoutMessage(int what, Object arg, long timeoutMs) {
         mHandler.removeMessages(what, arg);
         final Message msg = mHandler.obtainMessage(what, arg);
-        mHandler.sendMessageDelayed(msg, DRAG_TIMEOUT_MS);
+        mHandler.sendMessageDelayed(msg, timeoutMs);
     }
 
     /**
@@ -332,6 +347,30 @@ class DragDropController {
         }
     }
 
+    boolean dropForAccessibility(IWindow window, float x, float y) {
+        synchronized (mService.mGlobalLock) {
+            final boolean isA11yEnabled = getAccessibilityManager().isEnabled();
+            if (!dragDropActiveLocked()) {
+                return false;
+            }
+            if (mDragState.isAccessibilityDragDrop() && isA11yEnabled) {
+                final WindowState winState = mService.windowForClientLocked(
+                        null, window, false);
+                if (!mDragState.isWindowNotified(winState)) {
+                    return false;
+                }
+                IBinder token = winState.mInputChannelToken;
+                return mDragState.reportDropWindowLock(token, x, y);
+            }
+            return false;
+        }
+    }
+
+    AccessibilityManager getAccessibilityManager() {
+        return (AccessibilityManager) mService.mContext.getSystemService(
+                Context.ACCESSIBILITY_SERVICE);
+    }
+
     private class DragHandler extends Handler {
         /**
          * Lock for window manager.

services/core/java/com/android/server/wm/DragState.java

@@ -253,7 +253,7 @@ class DragState {
                 mTransaction.reparent(mSurfaceControl, null).apply();
             } else {
                 mDragDropController.sendTimeoutMessage(MSG_REMOVE_DRAG_SURFACE_TIMEOUT,
-                        mSurfaceControl);
+                        mSurfaceControl, DragDropController.DRAG_TIMEOUT_MS);
             }
             mSurfaceControl = null;
         }
@@ -276,9 +276,9 @@ class DragState {
      * Notify the drop target and tells it about the data. If the drop event is not sent to the
      * target, invokes {@code endDragLocked} immediately.
      */
-    void reportDropWindowLock(IBinder token, float x, float y) {
+    boolean reportDropWindowLock(IBinder token, float x, float y) {
         if (mAnimator != null) {
-            return;
+            return false;
         }
 
         final WindowState touchedWin = mService.mInputToWindowMap.get(token);
@@ -288,7 +288,7 @@ class DragState {
             mDragResult = false;
             endDragLocked();
             if (DEBUG_DRAG) Slog.d(TAG_WM, "Drop outside a valid window " + touchedWin);
-            return;
+            return false;
         }
 
         if (DEBUG_DRAG) Slog.d(TAG_WM, "sending DROP to " + touchedWin);
@@ -322,16 +322,19 @@ class DragState {
             touchedWin.mClient.dispatchDragEvent(event);
 
             // 5 second timeout for this window to respond to the drop
-            mDragDropController.sendTimeoutMessage(MSG_DRAG_END_TIMEOUT, clientToken);
+            mDragDropController.sendTimeoutMessage(MSG_DRAG_END_TIMEOUT, clientToken,
+                    DragDropController.DRAG_TIMEOUT_MS);
         } catch (RemoteException e) {
             Slog.w(TAG_WM, "can't send drop notification to win " + touchedWin);
             endDragLocked();
+            return false;
         } finally {
             if (myPid != touchedWin.mSession.mPid) {
                 event.recycle();
             }
         }
         mToken = clientToken;
+        return true;
     }
 
     class InputInterceptor {
@@ -553,7 +556,7 @@ class DragState {
         }
     }
 
-    private boolean isWindowNotified(WindowState newWin) {
+    boolean isWindowNotified(WindowState newWin) {
         for (WindowState ws : mNotifiedWindows) {
             if (ws == newWin) {
                 return true;
@@ -567,8 +570,10 @@ class DragState {
             return;
         }
         if (!mDragResult) {
-            mAnimator = createReturnAnimationLocked();
+            if (!isAccessibilityDragDrop()) {
-            return;  // Will call closeLocked() when the animation is done.
+                mAnimator = createReturnAnimationLocked();
+                return;  // Will call closeLocked() when the animation is done.
+            }
         }
         closeLocked();
     }
@@ -577,7 +582,7 @@ class DragState {
         if (mAnimator != null) {
             return;
         }
-        if (!mDragInProgress || skipAnimation) {
+        if (!mDragInProgress || skipAnimation || isAccessibilityDragDrop()) {
             // mDragInProgress is false if an app invokes Session#cancelDragAndDrop before
             // Session#performDrag. Reset the drag state without playing the cancel animation
             // because H.DRAG_START_TIMEOUT may be sent to WindowManagerService, which will cause
@@ -722,4 +727,8 @@ class DragState {
             mDragDropController.sendHandlerMessage(MSG_ANIMATION_END, null);
         }
     }
+
+    boolean isAccessibilityDragDrop() {
+        return (mFlags & View.DRAG_FLAG_ACCESSIBILITY_ACTION) != 0;
+    }
 }

services/core/java/com/android/server/wm/Session.java

@@ -299,6 +299,17 @@ class Session extends IWindowSession.Stub implements IBinder.DeathRecipient {
         }
     }
 
+
+    @Override
+    public boolean dropForAccessibility(IWindow window, int x, int y) {
+        final long ident = Binder.clearCallingIdentity();
+        try {
+            return mDragDropController.dropForAccessibility(window, x, y);
+        } finally {
+            Binder.restoreCallingIdentity(ident);
+        }
+    }
+
     /**
      * Validates the given drag data.
      */

services/tests/wmtests/src/com/android/server/wm/DragDropControllerTests.java

@@ -58,6 +58,7 @@ import android.view.SurfaceControl;
 import android.view.SurfaceSession;
 import android.view.View;
 import android.view.WindowManager;
+import android.view.accessibility.AccessibilityManager;
 
 import androidx.test.filters.SmallTest;
 
@@ -70,6 +71,7 @@ import org.junit.Before;
 import org.junit.BeforeClass;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.mockito.Mockito;
 
 import java.util.ArrayList;
 import java.util.concurrent.CountDownLatch;
@@ -97,14 +99,20 @@ public class DragDropControllerTests extends WindowTestsBase {
     static class TestDragDropController extends DragDropController {
         private Runnable mCloseCallback;
         boolean mDeferDragStateClosed;
+        boolean mIsAccessibilityDrag;
 
         TestDragDropController(WindowManagerService service, Looper looper) {
             super(service, looper);
         }
 
         void setOnClosedCallbackLocked(Runnable runnable) {
-            assertTrue(dragDropActiveLocked());
+            if (mIsAccessibilityDrag) {
-            mCloseCallback = runnable;
+                // Accessibility does not use animation
+                assertTrue(!dragDropActiveLocked());
+            } else {
+                assertTrue(dragDropActiveLocked());
+                mCloseCallback = runnable;
+            }
         }
 
         @Override
@@ -171,6 +179,10 @@ public class DragDropControllerTests extends WindowTestsBase {
         }
         latch = new CountDownLatch(1);
         mTarget.setOnClosedCallbackLocked(latch::countDown);
+        if (mTarget.mIsAccessibilityDrag) {
+            mTarget.mIsAccessibilityDrag = false;
+            return;
+        }
         assertTrue(awaitInWmLock(() -> latch.await(TIMEOUT_MS, TimeUnit.MILLISECONDS)));
     }
 
@@ -179,6 +191,12 @@ public class DragDropControllerTests extends WindowTestsBase {
         doDragAndDrop(0, ClipData.newPlainText("label", "Test"), 0, 0);
     }
 
+    @Test
+    public void testA11yDragFlow() {
+        mTarget.mIsAccessibilityDrag = true;
+        doA11yDragAndDrop(0, ClipData.newPlainText("label", "Test"), 0, 0);
+    }
+
     @Test
     public void testPerformDrag_NullDataWithGrantUri() {
         doDragAndDrop(View.DRAG_FLAG_GLOBAL | View.DRAG_FLAG_GLOBAL_URI_READ, null, 0, 0);
@@ -436,4 +454,22 @@ public class DragDropControllerTests extends WindowTestsBase {
             appSession.kill();
         }
     }
+
+    private void doA11yDragAndDrop(int flags, ClipData data, float dropX, float dropY) {
+        spyOn(mTarget);
+        AccessibilityManager accessibilityManager = Mockito.mock(AccessibilityManager.class);
+        when(accessibilityManager.isEnabled()).thenReturn(true);
+        doReturn(accessibilityManager).when(mTarget).getAccessibilityManager();
+        startA11yDrag(flags, data, () -> {
+            boolean dropped = mTarget.dropForAccessibility(mWindow.mClient, dropX, dropY);
+            mToken = mWindow.mClient.asBinder();
+        });
+    }
+
+    private void startA11yDrag(int flags, ClipData data, Runnable r) {
+        mToken = mTarget.performDrag(0, 0, mWindow.mClient,
+                flags | View.DRAG_FLAG_ACCESSIBILITY_ACTION, null, 0, 0, 0, 0, 0, data);
+        assertNotNull(mToken);
+        r.run();
+    }
 }