onTouch_DoubleTap

DoubleTap.java

public boolean onTouch(View v, MotionEvent event) {
			// TODO Auto-generated method stub

			if (MotionEvent.ACTION_DOWN == event.getAction()) {
				if (mCurrentDownEvent != null
						&& mPreviousUpEvent != null
						&& isConsiderAsDoubleTap(mCurrentDownEvent,
								mPreviousUpEvent, event)) {
				}
				mCurrentDownEvent = MotionEvent.obtain(event);
			} else if (event.getAction() == MotionEvent.ACTION_UP) {
				System.out.println("once ");
				mPreviousUpEvent = MotionEvent.obtain(event);
			}
			return true;
		}

		private boolean isConsiderAsDoubleTap(MotionEvent firstDown,
				MotionEvent firstUp, MotionEvent secondDown) {
			// TODO Auto-generated method stub
			if (secondDown.getEventTime() - firstUp.getEventTime() > DOUBLE_TAP_TIMEOUT) {
				return false;
			}
			int deltaX = (int) firstUp.getX() - (int) secondDown.getX();
			int deltaY = (int) firstUp.getY() - (int) secondDown.getY();
			return deltaX * deltaX + deltaY * deltaY < 10000;
		}