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Use the layout xml attribute splitMotionEvents="true" or the ViewGroup method setMotionEventSplittingEnabled(true) to enable motion event splitting. Rules for splitting are as follows: * Splitting is enabled per ViewGroup. When splitting is enabled any MotionEvent dispatched to that ViewGroup can potentially be split into several and dispatched to children independently. * Each pointer is assigned a target child view when the ACTION_DOWN or ACTION_POINTER_DOWN event is received. That will be the pointer's target until it goes up, the target returns false from onTouchEvent, or the MotionEvents are intercepted. * Multiple pointers may be assigned to the same target. All pointer data sent to a target are bundled into a single MotionEvent. Child views do not need to be aware that splitting has occurred. Change-Id: I993f838e2f6b455da9812f4742a016dfcd1c4cc9