android - ViewPager 导航按钮

Question

我的 xml-pager 文件中已经有了“左”和“右”两个按钮。 我想设置它们:当我点击“左”按钮时，页面会自动向左滑动，当我点击“右”按钮时，它会自动向右滑动。有人可以给我代码以放入我的 Activity 文件吗？谢谢!

Answer 1

要转到下一页/上一页，请使用如下内容:

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);
}