Question

我使用计时器自动滑动viewpager。但到达最后一页后，计时器停止。如何让它从第一页再次继续？

final Handler mHandler = new Handler();
    final Runnable mUpdateResults = new Runnable() {
        public void run() {
            pager.setCurrentItem(page++);

        }
    };

    int delay = 1000; // delay for 1 sec.

    int period = 4000; // repeat every 4 sec.

    Timer timer = new Timer();

    timer.scheduleAtFixedRate(new TimerTask() {

    public void run() {

         mHandler.post(mUpdateResults);

    }

    }, delay, period);

Answer 1

最新答案 2021 设置 viewPager 适配器后

 private Runnable runnable = null;

 public void function DisplaySlider(){

sliderItemAdapter = new SliderItemAdapter(getActivity(), mSliderList);//push the data to the adapter
mViewPager.setAdapter(sliderItemAdapter); //set the adapter to the view pager
startAutoSlider(sliderItem.getCount());

}

private void startAutoSlider(final int count) {

runnable = new Runnable() {
    @Override
    public void run() {
        int pos = mViewPager.getCurrentItem();
        pos = pos + 1;
        if (pos >= count) pos = 0;
        mViewPager.setCurrentItem(pos);
        handler.postDelayed(runnable, 3000);
    }
};
handler.postDelayed(runnable, 3000);

}

最后不要忘记从回调中释放内存

  @Override
      public void onDestroy() {
if (runnable != null) handler.removeCallbacks(runnable);
super.onDestroy();

}

Answer 2

final Runnable mUpdateResults = new Runnable() {
    public void run() {
        int numPages = pager.getAdapter().getCount();
        page = (page + 1) % numPages;
        pager.setCurrentItem(page);

    }
};

当超过寻呼机限制

时，将当前项设置为0

Answer 3

下面的答案会有所帮助；

$data = array();
array_push($data,"10:00PM");
array_push($data,"12:00PM");
echo json_encode($data);

在android中不停止自动滚动viewpager

3 个答案: