Zooms in or out if startPoint1 and startPoint2 are larger or smaller then endPoint1 and endPoint2. Requires API level >= 14. @param startPoint1 First "finger" down on the screen @param startPoint2 Second "finger" down on the screen @param endPoint1 Corresponding ending point of startPoint1 @param e
(PointF startPoint1, PointF startPoint2, PointF endPoint1, PointF endPoint2)
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