code: private void reset() {
          if (mVelocityTracker != null) {
              mVelocityTracker.recycle();
          }
  
          mVelocityTracker = null;
          mDownX = 0;
          mDownY = 0;
          mCurrentView = null;
          mSwipingView = null;
          mCurrentPosition = AdapterView.INVALID_POSITION;
          mSwiping = false;
          mCanDismissCurrent = false;
      }
docs: Resets the fields to the initial values, ready to start over.