SwipeView类似桌面的滑动界面(6)

            page--; 
        } 
        else if(page<0) 
        { 
            page=0; 
        } 
         
        if(smooth) 
        { 
            smoothScrollTo(page*mPageWidth,0); 
        } 
        else 
        { 
            scrollTo(page*mPageWidth,0); 
        } 
        mCurrentPage = page; 
         
        if(mOnPageChangedListener!=null && oldPage!=page) 
        { 
            mOnPageChangedListener.onPageChanged(oldPage, page); 
        } 
        if(mPageControl!=null && oldPage!=page) 
        { 
            mPageControl.setCurrentPage(page); 
        } 
         
        mCallScrollToPageInOnLayout=!mCallScrollToPageInOnLayout; 
    } 
     
    /**
     * Set the width of each page. This function returns an integer that should be added to the left margin of 
     * the first child and the right margin of the last child. This enables all the children to appear to be 
     * central
     * 
     * @param pageWidth The width you wish to assign for each page
     * @return An integer to add to the left margin of the first child and the right margin of the last child
     */ 
    public int setPageWidth(int pageWidth) 
    { 
        mPageWidth = pageWidth; 
        return (SCREEN_WIDTH - mPageWidth)/2;