Store pending connected view when requesting focus Before this change, HandwritingInitiator would request focus for a handwriting view when it detected stylus movement on the view, and expect an InputConnection to be created for that view. However, in some apps, an InputConnection could be created for a different view, before the InputConnection for the focus requested view is created (for example, see b/286289041). This would cause handwriting initiation to fail. To handle this case, HandwritingInitiator stores a reference to the view when it requests focus, then waits for the InputConnection to be created for that view, and ignores any other InputConnections created in the meantime. Bug: 286287855 Test: atest HandwritingInitiatorTest Change-Id: I63ca718e1ac7221f28aa6f4c6dd1d66974e12118

diff --git a/core/java/android/view/HandwritingInitiator.java b/core/java/android/view/HandwritingInitiator.java
index ab58306b..4cfec99 100644
--- a/core/java/android/view/HandwritingInitiator.java
+++ b/core/java/android/view/HandwritingInitiator.java

@@ -208,6 +208,7 @@
                             candidateView.getHandwritingDelegatorCallback().run();
                             mState.mHasPreparedHandwritingDelegation = true;
                         } else {
+                            mState.mPendingConnectedView = new WeakReference<>(candidateView);
                             requestFocusWithoutReveal(candidateView);
                         }
                     }
@@ -269,8 +270,9 @@
                 mShowHoverIconForConnectedView = false;
                 return;
             }
-            if (mState != null && mState.mShouldInitHandwriting) {
-                tryStartHandwriting();
+            if (mState != null && mState.mPendingConnectedView != null
+                    && mState.mPendingConnectedView.get() == view) {
+                startHandwriting(view);
             }
         }
     }
@@ -295,40 +297,6 @@
         }
     }
 
-    /**
-     * Try to initiate handwriting. For this method to successfully send startHandwriting signal,
-     * the following 3 conditions should meet:
-     *   a) The stylus movement exceeds the touchSlop.
-     *   b) A View has built InputConnection with IME.
-     *   c) The stylus event lands into the connected View's boundary.
-     * This method will immediately fail without any side effect if condition a or b is not met.
-     * However, if both condition a and b are met but the condition c is not met, it will reset the
-     * internal states. And HandwritingInitiator won't attempt to call startHandwriting until the
-     * next ACTION_DOWN.
-     */
-    private void tryStartHandwriting() {
-        if (!mState.mExceedHandwritingSlop) {
-            return;
-        }
-        final View connectedView = getConnectedView();
-        if (connectedView == null) {
-            return;
-        }
-
-        if (!connectedView.isAutoHandwritingEnabled()) {
-            clearConnectedView();
-            return;
-        }
-
-        final Rect handwritingArea = getViewHandwritingArea(connectedView);
-        if (isInHandwritingArea(
-                handwritingArea, mState.mStylusDownX, mState.mStylusDownY, connectedView)) {
-            startHandwriting(connectedView);
-        } else {
-            mState.mShouldInitHandwriting = false;
-        }
-    }
-
     /** Starts a stylus handwriting session for the view. */
     @VisibleForTesting
     public void startHandwriting(@NonNull View view) {
@@ -631,6 +599,7 @@
         private boolean mHasInitiatedHandwriting;
 
         private boolean mHasPreparedHandwritingDelegation;
+
         /**
          * Whether the current ongoing stylus MotionEvent sequence already exceeds the
          * handwriting slop.
@@ -639,6 +608,12 @@
          */
         private boolean mExceedHandwritingSlop;
 
+        /**
+         * A view which has requested focus and is pending input connection creation. When an input
+         * connection is created for the view, a handwriting session should be started for the view.
+         */
+        private WeakReference<View> mPendingConnectedView = null;
+
         /** The pointer id of the stylus pointer that is being tracked. */
         private final int mStylusPointerId;
         /** The time stamp when the stylus pointer goes down. */

diff --git a/core/tests/coretests/src/android/view/stylus/HandwritingInitiatorTest.java b/core/tests/coretests/src/android/view/stylus/HandwritingInitiatorTest.java
index 8028b14..f1eef75 100644
--- a/core/tests/coretests/src/android/view/stylus/HandwritingInitiatorTest.java
+++ b/core/tests/coretests/src/android/view/stylus/HandwritingInitiatorTest.java

@@ -221,8 +221,10 @@
 
     @Test
     public void onTouchEvent_startHandwriting_inputConnectionBuilt_stylusMoveInExtendedHWArea() {
+        // The stylus down point is between mTestView1 and  mTestView2, but it is within the
+        // extended handwriting area of both views. It is closer to mTestView1.
         final int x1 = sHwArea1.right + HW_BOUNDS_OFFSETS_RIGHT_PX / 2;
-        final int y1 = sHwArea1.bottom + HW_BOUNDS_OFFSETS_BOTTOM_PX / 2;
+        final int y1 = sHwArea1.bottom + (sHwArea2.top - sHwArea1.bottom) / 3;
         MotionEvent stylusEvent1 = createStylusEvent(ACTION_DOWN, x1, y1, 0);
         mHandwritingInitiator.onTouchEvent(stylusEvent1);
 
@@ -231,10 +233,14 @@
         MotionEvent stylusEvent2 = createStylusEvent(ACTION_MOVE, x2, y2, 0);
         mHandwritingInitiator.onTouchEvent(stylusEvent2);
 
-        // InputConnection is created after stylus movement.
-        mHandwritingInitiator.onInputConnectionCreated(mTestView1);
+        // First create InputConnection for mTestView2 and verify that handwriting is not started.
+        mHandwritingInitiator.onInputConnectionCreated(mTestView2);
+        verify(mHandwritingInitiator, never()).startHandwriting(mTestView2);
 
-        verify(mHandwritingInitiator, times(1)).startHandwriting(mTestView1);
+        // Next create InputConnection for mTextView1. Handwriting is started for this view since
+        // the stylus down point is closest to this view.
+        mHandwritingInitiator.onInputConnectionCreated(mTestView1);
+        verify(mHandwritingInitiator).startHandwriting(mTestView1);
     }
 
     @Test