android - WebView getting rid of double tap zoom. - Stack Overflow

android - WebView getting rid of double tap zoom. - Stack Overflow:

  @Override
        public boolean onTouch(View v, MotionEvent event) { 
            if (event.getY() >= 0)  // Otherwise it's a fake tap we simulated
            {               
                if (dtTime == 0)
                {
                    dtDistance = ViewConfiguration.get(v.getContext()).getScaledDoubleTapSlop();    // Maximum distance between taps for them to be considered double tap
                    dtDistanceSquared = dtDistance * dtDistance;
                    dtTime = ViewConfiguration.getDoubleTapTimeout();   // Maximum time elapsed between taps for them to be considered double tap
                }

                switch (event.getAction())
                {
                    case MotionEvent.ACTION_UP:
                        lastUp = event.getEventTime();
                        break;
                    case MotionEvent.ACTION_DOWN:
                        long t = event.getEventTime(); 
                        if (t - lastUp < dtTime * 4/3)  // Very rarely just (t - lastUp <= dtTime) doesn't work
                        {
                            int x = getRemoteX(event.getX());
                            if (inRadius(x, -1, lastDownX, lastDownY))
                                performTap(v, getRemoteX(lastDownX), -1, t);    // Otherwise our fake tap would constitute a double tap with the previous real tap
                            performTap(v, x, -1, t);                                
                        }
                        lastDownX = event.getX();
                        lastDownY = event.getY();
                        break;                      
                }
            }

            return false;                                   
        }
    });