利用Android制作一个商品详情页

ensureTarget();  if (null == mTarget) {   return false;  }  if (!isEnabled()) {   return false;  }  final int aciton = MotionEventCompat.getActionMasked(ev);  boolean shouldIntercept = false;  switch (aciton) {   case MotionEvent.ACTION_DOWN: {    mInitMotionX = ev.getX();    mInitMotionY = ev.getY();    shouldIntercept = false;    break;   }   case MotionEvent.ACTION_MOVE: {    final float x = ev.getX();    final float y = ev.getY();    final float xDiff = x - mInitMotionX;    final float yDiff = y - mInitMotionY;    if (canChildScrollVertically((int) yDiff)) {     shouldIntercept = false;    } else {     final float xDiffabs = Math.abs(xDiff);     final float yDiffabs = Math.abs(yDiff);     if (yDiffabs > mTouchSlop && yDiffabs >= xDiffabs       && !(mStatus == Status.CLOSE && yDiff > 0       || mStatus == Status.OPEN && yDiff < 0)) {      shouldIntercept = true;     }    }    break;   }   case MotionEvent.ACTION_UP:   case MotionEvent.ACTION_CANCEL: {    shouldIntercept = false;    break;   }  }  return shouldIntercept;