ViewPager导航按钮 [英] ViewPager navigation buttons

问题描述

我已经有两个按钮左和右在我的XML-寻呼机文件.. 我想将它们设置：当我点击左按钮，页面程序自动刷卡左，当我点击右键按钮，它会自动进入正确的..有人可以给我的code把我的活动文件？谢谢！

I already have the two buttons "left" and "right" in my xml-pager file.. I want to set them: when i click on "left" button the page swipe automaticlly to left and when i click on "right" button it goes automatically to right.. can someone give me the code to put in my activity file? thank you!

推荐答案

要进入下一个/ previous页面使用类似如下：

To go the next/previous page use something like the following:

private void nextPage() {
    int currentPage = viewPager.getCurrent();
    int totalPages = viewPager.getAdapter().getCount();

    int nextPage = currentPage+1;
    if (nextPage >= totalPages) {
        // We can't go forward anymore.
        // Loop to the first page. If you don't want looping just
        // return here.
        nextPage = 0;
    }

    viewPager.setCurrentItem(nextPage, true);
}

private void previousPage() {
    int currentPage = viewPager.getCurrent();
    int totalPages = viewPager.getAdapter().getCount();

    int previousPage = currentPage-1;
    if (previousPage < 0) {
        // We can't go back anymore.
        // Loop to the last page. If you don't want looping just
        // return here.
        previousPage = totalPages - 1;
    }

    viewPager.setCurrentItem(previousPage, true);
}

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