Program: 192476
Project: 192476
Buggy source:
/** 
 * Handle a motion event.  If an action is completed, the appropriate callback on mListener is called, and the return value of the callback is passed to the caller.
 * @param event The raw motion event.  It's important that this be the rawevent, before any transformations have been applied, so that measurements can be made in physical units.
 * @param policyFlags Policy flags for the event.
 * @return true if the event is consumed, else false
 */
public boolean onMotionEvent(MotionEvent event,int policyFlags){
  final float x=event.getX();
  final float y=event.getY();
  final long time=event.getEventTime();
  mPolicyFlags=policyFlags;
switch (event.getActionMasked()) {
case MotionEvent.ACTION_DOWN:
    mDoubleTapDetected=false;
  mSecondFingerDoubleTap=false;
mRecognizingGesture=true;
mGestureStarted=false;
mPreviousGestureX=x;
mPreviousGestureY=y;
mStrokeBuffer.clear();
mStrokeBuffer.add(new GesturePoint(x,y,time));
mBaseX=x;
mBaseY=y;
mBaseTime=time;
break;
case MotionEvent.ACTION_MOVE:
if (mRecognizingGesture) {
final float deltaX=mBaseX - x;
final float deltaY=mBaseY - y;
final double moveDelta=Math.hypot(deltaX,deltaY);
if (moveDelta > mGestureDetectionThreshold) {
mBaseX=x;
mBaseY=y;
mBaseTime=time;
if (!mGestureStarted) {
mGestureStarted=true;
return mListener.onGestureStarted();
}
}
 else {
final long timeDelta=time - mBaseTime;
final long threshold=mGestureStarted ? CANCEL_ON_PAUSE_THRESHOLD_STARTED_MS : CANCEL_ON_PAUSE_THRESHOLD_NOT_STARTED_MS;
if (timeDelta > threshold) {
cancelGesture();
return mListener.onGestureCancelled(event,policyFlags);
}
}
final float dX=Math.abs(x - mPreviousGestureX);
final float dY=Math.abs(y - mPreviousGestureY);
if (dX >= TOUCH_TOLERANCE || dY >= TOUCH_TOLERANCE) {
mPreviousGestureX=x;
mPreviousGestureY=y;
mStrokeBuffer.add(new GesturePoint(x,y,time));
}
}
break;
case MotionEvent.ACTION_UP:
if (mDoubleTapDetected) {
return finishDoubleTap(event,policyFlags);
}
if (mGestureStarted) {
mStrokeBuffer.add(new GesturePoint(x,y,time));
return recognizeGesture(event,policyFlags);
}
break;
case MotionEvent.ACTION_POINTER_DOWN:
cancelGesture();
if (event.getPointerCount() == 2) {
mSecondFingerDoubleTap=true;
mSecondPointerDownTime=time;
}
 else {
mSecondFingerDoubleTap=false;
}
break;
case MotionEvent.ACTION_POINTER_UP:
if (mSecondFingerDoubleTap && mDoubleTapDetected) {
return finishDoubleTap(event,policyFlags);
}
break;
case MotionEvent.ACTION_CANCEL:
clear();
break;
}
if (mSecondFingerDoubleTap) {
MotionEvent newEvent=mapSecondPointerToFirstPointer(event);
if (newEvent == null) {
return false;
}
boolean handled=mGestureDetector.onTouchEvent(newEvent);
newEvent.recycle();
return handled;
}
if (!mRecognizingGesture) {
return false;
}
return mGestureDetector.onTouchEvent(event);
}

Fixed version (ground truth):
/** 
 * Handle a motion event.  If an action is completed, the appropriate callback on mListener is called, and the return value of the callback is passed to the caller.
 * @param event The raw motion event.  It's important that this be the rawevent, before any transformations have been applied, so that measurements can be made in physical units.
 * @param policyFlags Policy flags for the event.
 * @return true if the event is consumed, else false
 */
public boolean onMotionEvent(MotionEvent event,int policyFlags){
  final float x=event.getX();
  final float y=event.getY();
  final long time=event.getEventTime();
  mPolicyFlags=policyFlags;
switch (event.getActionMasked()) {
case MotionEvent.ACTION_DOWN:
    mDoubleTapDetected=false;
  mSecondFingerDoubleTap=false;
mRecognizingGesture=true;
mGestureStarted=false;
mPreviousGestureX=x;
mPreviousGestureY=y;
mStrokeBuffer.clear();
mStrokeBuffer.add(new GesturePoint(x,y,time));
mBaseX=x;
mBaseY=y;
mBaseTime=time;
break;
case MotionEvent.ACTION_MOVE:
if (mRecognizingGesture) {
final float deltaX=mBaseX - x;
final float deltaY=mBaseY - y;
final double moveDelta=Math.hypot(deltaX,deltaY);
if (moveDelta > mGestureDetectionThreshold) {
mBaseX=x;
mBaseY=y;
mBaseTime=time;
mFirstTapDetected=false;
mDoubleTapDetected=false;
if (!mGestureStarted) {
mGestureStarted=true;
return mListener.onGestureStarted();
}
}
 else if (!mFirstTapDetected) {
final long timeDelta=time - mBaseTime;
final long threshold=mGestureStarted ? CANCEL_ON_PAUSE_THRESHOLD_STARTED_MS : CANCEL_ON_PAUSE_THRESHOLD_NOT_STARTED_MS;
if (timeDelta > threshold) {
cancelGesture();
return mListener.onGestureCancelled(event,policyFlags);
}
}
final float dX=Math.abs(x - mPreviousGestureX);
final float dY=Math.abs(y - mPreviousGestureY);
if (dX >= TOUCH_TOLERANCE || dY >= TOUCH_TOLERANCE) {
mPreviousGestureX=x;
mPreviousGestureY=y;
mStrokeBuffer.add(new GesturePoint(x,y,time));
}
}
break;
case MotionEvent.ACTION_UP:
if (mDoubleTapDetected) {
return finishDoubleTap(event,policyFlags);
}
if (mGestureStarted) {
mStrokeBuffer.add(new GesturePoint(x,y,time));
return recognizeGesture(event,policyFlags);
}
break;
case MotionEvent.ACTION_POINTER_DOWN:
cancelGesture();
if (event.getPointerCount() == 2) {
mSecondFingerDoubleTap=true;
mSecondPointerDownTime=time;
}
 else {
mSecondFingerDoubleTap=false;
}
break;
case MotionEvent.ACTION_POINTER_UP:
if (mSecondFingerDoubleTap && mDoubleTapDetected) {
return finishDoubleTap(event,policyFlags);
}
break;
case MotionEvent.ACTION_CANCEL:
clear();
break;
}
if (mSecondFingerDoubleTap) {
MotionEvent newEvent=mapSecondPointerToFirstPointer(event);
if (newEvent == null) {
return false;
}
boolean handled=mGestureDetector.onTouchEvent(newEvent);
newEvent.recycle();
return handled;
}
if (!mRecognizingGesture) {
return false;
}
return mGestureDetector.onTouchEvent(event);
}