@Override public boolean onTouchEvent(MotionEvent event) { int x = (int) event.getX(); int y = (int) event.getY(); switch (event.getAction()) { case MotionEvent.ACTION_DOWN: lastX = (int) event.getX(); lastY = (int) event.getY(); break; case MotionEvent.ACTION_MOVE: int offsetX = x - lastX; int offsetY = y - lastY; ((View) getParent()).scrollBy(-offsetX, -offsetY); break; case MotionEvent.ACTION_UP: // 手指离开时,执行滑动过程 View viewGroup = ((View) getParent()); ScrollerHelper.getScroller() .startScroll( viewGroup.getScrollX(), viewGroup.getScrollY(), -viewGroup.getScrollX(), -viewGroup.getScrollY()); invalidate(); break; } return true; }