在PageViewer自动滚屏 [英] Automatically scroll in PageViewer

问题描述

我有pageviewer一个问题。我想我的页面滚动每两秒钟。我尝试是这样的：

I have a problem with pageviewer. I want to my page scroll every two seconds. I try something like this:

handler.postDelayed(new Runnable() {
    public void run() {

        viewPager.setCurrentItem(viewPager.getCurrentItem()+1, true);

    } 
},2000);

但它的工作原理，只有当我开始活动。如果我把这个code到公共无效onPageSelected（INT页）它的工作原理，但我想这样做，当我点击和手动滚动网页我想停止这种处理，但它doeasn't工作。我该怎么办呢？

But it works only when I start activity. If i put this code to public void onPageSelected(int page) it works but I want to do when I click and manually scroll page I want to stop this handler but it doeasn't work. How I can do that?

推荐答案

您应该定义你的Runnable和处理程序是这样的：

You should define your Runnable and Handler like this:

private boolean pagerMoved = false;
private static final long ANIM_VIEWPAGER_DELAY = 2000;

private Handler h = new Handler();
    private Runnable animateViewPager = new Runnable() {
        public void run() {
            if (!pagerMoved) {
                viewPager.setCurrentItem(viewPager.getCurrentItem()+1, true);
                h.postDelayed(animationFrame, ANIM_VIEWPAGER_DELAY);
            }
        }
    };

请确保您的设置，并在您的onPause和放大器拆除; onResume方法

Make sure that you setup and tear down in your onPause & onResume methods

@Override
    public void onPause() {
        super.onPause();
        if (h != null) {
            h.removeCallbacks(animateViewPager);
        }
    }

    @Override
    public void onResume() {
        super.onResume();
        h.postDelayed(animateViewPager, ANIM_VIEWPAGER_DELAY);
    }

最后，你需要听你的viewpager触摸事件，使您可以设置pagerMoved为true（将停止进一步的自动页面过渡）。

Finally, you'll need to listen for a touch event on your viewpager so that you can set pagerMoved to true (which will then stop further automatic page transitions).

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