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Commit 982cb983 authored by Adam Powell's avatar Adam Powell
Browse files

Fix bug 4533120 - rough handling of invalid event streams in 

ScaleGestureDetector

Make ScaleGestureDetector a bit more tolerant of bogus event streams.

Change-Id: I28a8b1ea494b7f1ca9d4c4623b95aee38f213369
parent 8de47a2f

core/java/android/view/ScaleGestureDetector.java

+9 −0
Original line number Diff line number Diff line
@@ -329,6 +329,15 @@ public class ScaleGestureDetector { 
                        // Set focus point to the remaining finger

                        final int index = event.findPointerIndex(actionId == mActiveId0 ?

                                mActiveId1 : mActiveId0);

                        if (index < 0) {

                            mInvalidGesture = true;

                            Log.e(TAG, "Invalid MotionEvent stream detected.", new Throwable());

                            if (mGestureInProgress) {

                                mListener.onScaleEnd(this);

                            }

                            return false;

                        }



                        mActiveId0 = event.getPointerId(index);



                        mActive0MostRecent = true;