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Commit f2db2ab1 authored by Alan Viverette's avatar Alan Viverette
Browse files

Fix OnGestureListener nullability annotations 

First motion event may be null in cases where the event stream is
incomplete.

Relnote: Fixed nullability for OnGestureListener methods
Fixes: 249227476
Test: GestureDetectorTest
Change-Id: I85117033e7dbb248e787de453857fff6b15e4474
parent ba42d783

core/api/current.txt

+4 −4
Original line number Diff line number Diff line
@@ -48386,9 +48386,9 @@ package android.view { 














  public static interface GestureDetector.OnGestureListener {















    method public boolean onDown(@NonNull android.view.MotionEvent);













    method public boolean onFling(@NonNull android.view.MotionEvent, @NonNull android.view.MotionEvent, float, float);













    method public boolean onFling(@Nullable android.view.MotionEvent, @NonNull android.view.MotionEvent, float, float);















    method public void onLongPress(@NonNull android.view.MotionEvent);













    method public boolean onScroll(@NonNull android.view.MotionEvent, @NonNull android.view.MotionEvent, float, float);













    method public boolean onScroll(@Nullable android.view.MotionEvent, @NonNull android.view.MotionEvent, float, float);















    method public void onShowPress(@NonNull android.view.MotionEvent);















    method public boolean onSingleTapUp(@NonNull android.view.MotionEvent);















  }









@@ -48399,9 +48399,9 @@ package android.view {













    method public boolean onDoubleTap(@NonNull android.view.MotionEvent);















    method public boolean onDoubleTapEvent(@NonNull android.view.MotionEvent);















    method public boolean onDown(@NonNull android.view.MotionEvent);













    method public boolean onFling(@NonNull android.view.MotionEvent, @NonNull android.view.MotionEvent, float, float);













    method public boolean onFling(@Nullable android.view.MotionEvent, @NonNull android.view.MotionEvent, float, float);















    method public void onLongPress(@NonNull android.view.MotionEvent);













    method public boolean onScroll(@NonNull android.view.MotionEvent, @NonNull android.view.MotionEvent, float, float);













    method public boolean onScroll(@Nullable android.view.MotionEvent, @NonNull android.view.MotionEvent, float, float);















    method public void onShowPress(@NonNull android.view.MotionEvent);















    method public boolean onSingleTapConfirmed(@NonNull android.view.MotionEvent);















    method public boolean onSingleTapUp(@NonNull android.view.MotionEvent);

























core/java/android/view/GestureDetector.java



+8
−6






























Original line number
Diff line number
Diff line








@@ -96,7 +96,8 @@ public class GestureDetector {













         * current move {@link MotionEvent}. The distance in x and y is also supplied for















         * convenience.















         *













         * @param e1 The first down motion event that started the scrolling.













         * @param e1 The first down motion event that started the scrolling. A {@code null} event













         *           indicates an incomplete event stream or error state.















         * @param e2 The move motion event that triggered the current onScroll.















         * @param distanceX The distance along the X axis that has been scrolled since the last















         *              call to onScroll. This is NOT the distance between {@code e1}









@@ -106,7 +107,7 @@ public class GestureDetector {













         *              and {@code e2}.















         * @return true if the event is consumed, else false















         */













        boolean onScroll(@NonNull MotionEvent e1, @NonNull MotionEvent e2, float distanceX,













        boolean onScroll(@Nullable MotionEvent e1, @NonNull MotionEvent e2, float distanceX,















                float distanceY);































        /**









@@ -122,7 +123,8 @@ public class GestureDetector {













         * and the matching up {@link MotionEvent}. The calculated velocity is supplied along















         * the x and y axis in pixels per second.















         *













         * @param e1 The first down motion event that started the fling.













         * @param e1 The first down motion event that started the fling. A {@code null} event













         *           indicates an incomplete event stream or error state.















         * @param e2 The move motion event that triggered the current onFling.















         * @param velocityX The velocity of this fling measured in pixels per second















         *              along the x axis.









@@ -130,7 +132,7 @@ public class GestureDetector {













         *              along the y axis.















         * @return true if the event is consumed, else false















         */













        boolean onFling(@NonNull MotionEvent e1, @NonNull MotionEvent e2, float velocityX,













        boolean onFling(@Nullable MotionEvent e1, @NonNull MotionEvent e2, float velocityX,















                float velocityY);















    }


























@@ -201,12 +203,12 @@ public class GestureDetector {













        public void onLongPress(@NonNull MotionEvent e) {















        }





























        public boolean onScroll(@NonNull MotionEvent e1, @NonNull MotionEvent e2,













        public boolean onScroll(@Nullable MotionEvent e1, @NonNull MotionEvent e2,















                float distanceX, float distanceY) {















            return false;















        }





























        public boolean onFling(@NonNull MotionEvent e1, @NonNull MotionEvent e2, float velocityX,













        public boolean onFling(@Nullable MotionEvent e1, @NonNull MotionEvent e2, float velocityX,















                float velocityY) {















            return false;















        }