Android标签行为

时间:2018-03-24 04:23:12

标签: android listview tabs

我正在设计类似功能的标签视图,但我还需要一个功能。

假设我有三个标签

如果按Tab2 - 将显示第二个标签的内容 tab3 - 将显示第三个内容 tab1 - tab1的内容将显示

并默认选择tab1。这工作正常。

现在,我需要在浏览tab1的内容时,我需要显示第二个选项卡的强大功能(但应选择第二个选项卡)..就像网页上的单页应用程序一样..

我不需要网络视图。任何人都指导我如何实现这一点,或者如果github上有任何示例代码可用。请

由于

2 个答案:

答案 0 :(得分:1)

@AnkitaKashyap对不起伙计,我一直都忘记了,这是你的代码片段(在kotlin中),如果你需要帮助,请给我一个私人信息,如果我的想法正确,这就是你想要的gif demo : 使用带有recyclerview的tabbar并设置addOnTabSelectedListener:

productTabs.addOnTabSelectedListener(object : TabLayout.OnTabSelectedListener{
        override fun onTabReselected(tab: TabLayout.Tab?) {

        }

        override fun onTabUnselected(tab: TabLayout.Tab?) {
        }

        override fun onTabSelected(tab: TabLayout.Tab?) {


                productRv.scrollToPosition(tab?.position?:0)
        }
    })

并在您的recyclerview中设置:

productRv.addOnScrollListener(object : RecyclerView.OnScrollListener(){
        override fun onScrolled(recyclerView: RecyclerView?, dx: Int, dy: Int) {
            super.onScrolled(recyclerView, dx, dy)
            var scrollPosition = layoutManager.findFirstVisibleItemPosition()

            productTabs.getTabAt(scrollPosition)?.select()


        }

        override fun onScrollStateChanged(recyclerView: RecyclerView?, newState: Int) {
            super.onScrollStateChanged(recyclerView, newState)
        }
    })

答案 1 :(得分:0)

您需要使用此StackOverflow帖子中显示的VerticalViewPager,并使用TabLayout。

来自给定SO链接的代码:

/**
 * Uses a combination of a PageTransformer and swapping X & Y coordinates
 * of touch events to create the illusion of a vertically scrolling ViewPager. 
 * 
 * Requires API 11+
 * 
 */
public class VerticalViewPager extends ViewPager {

    public VerticalViewPager(Context context) {
        super(context);
        init();
    }

    public VerticalViewPager(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    private void init() {
        // The majority of the magic happens here
        setPageTransformer(true, new VerticalPageTransformer());
        // The easiest way to get rid of the overscroll drawing that happens on the left and right
        setOverScrollMode(OVER_SCROLL_NEVER);
    }

    private class VerticalPageTransformer implements ViewPager.PageTransformer {

        @Override
        public void transformPage(View view, float position) {

            if (position < -1) { // [-Infinity,-1)
                // This page is way off-screen to the left.
                view.setAlpha(0);

            } else if (position <= 1) { // [-1,1]
                view.setAlpha(1);

                // Counteract the default slide transition
                view.setTranslationX(view.getWidth() * -position);

                //set Y position to swipe in from top
                float yPosition = position * view.getHeight();
                view.setTranslationY(yPosition);

            } else { // (1,+Infinity]
                // This page is way off-screen to the right.
                view.setAlpha(0);
            }
        }
    }

    /**
     * Swaps the X and Y coordinates of your touch event.
     */
    private MotionEvent swapXY(MotionEvent ev) {
        float width = getWidth();
        float height = getHeight();

        float newX = (ev.getY() / height) * width;
        float newY = (ev.getX() / width) * height;

        ev.setLocation(newX, newY);

        return ev;
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev){
        boolean intercepted = super.onInterceptTouchEvent(swapXY(ev));
        swapXY(ev); // return touch coordinates to original reference frame for any child views
        return intercepted;
    }

    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        return super.onTouchEvent(swapXY(ev));
    }

}