TabLayout v23 不随 ViewPager 滚动而滚动

Question

在新的设计支持库 23.0.0 中，TabLayout 的选项卡在您拖动相关的 ViewPager 时不会滚动。仅当您完成拖动并向上单击时（当已选择选项卡时），选项卡才会滚动。这在 22.2.1

上运行良好

我是否必须添加更多内容才能使其像在 22.2.1 中一样工作？这是一个错误吗？有解决方法吗？

编辑

错误已在最新版本 23.0.1 中修复

Answer 1

Chris Banes (The main developer of the design support library). This issue was mentioned on the Google Issues page here, and solved here.

提出了解决该问题的方法

设置ViewPager时输入此代码：

    viewPager.clearOnPageChangeListeners();
    viewPager.addOnPageChangeListener(new TabLayoutOnPageChangeListener(tabLayout));

还要添加这个 class:

private static class TabLayoutOnPageChangeListener implements ViewPager.OnPageChangeListener {

    private final WeakReference<TabLayout> mTabLayoutRef;
    private int mPreviousScrollState;
    private int mScrollState;

    public TabLayoutOnPageChangeListener(TabLayout tabLayout) {
        mTabLayoutRef = new WeakReference<>(tabLayout);
    }

    @Override
    public void onPageScrollStateChanged(int state) {
        mPreviousScrollState = mScrollState;
        mScrollState = state;
    }

    @Override
    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
        final TabLayout tabLayout = mTabLayoutRef.get();
        if (tabLayout != null) {
            final boolean updateText = (mScrollState == ViewPager.SCROLL_STATE_DRAGGING)
                    || (mScrollState == ViewPager.SCROLL_STATE_SETTLING
                    && mPreviousScrollState == ViewPager.SCROLL_STATE_DRAGGING);
            tabLayout.setScrollPosition(position, positionOffset, updateText);
        }
    }

    @Override
    public void onPageSelected(int position) {
        final TabLayout tabLayout = mTabLayoutRef.get();
        if (tabLayout != null) {
            tabLayout.getTabAt(position).select();
        }
    }
}

TabLayout v23 不随 ViewPager 滚动而滚动

TabLayout v23 doesn't scroll with ViewPager scroll

android

androiddesignsupport

android-tablayout