ViewPager 无线循环并自动滚动

Activity：

private void initView(View view){

    initData();

    homeViewPagerAdapter = new HomeViewPagerAdapter(list);
    viewPager.setAdapter(homeViewPagerAdapter);
    startAutoPlay();
}

private void initData() {
    list = new ArrayList<>();
    ImageView view1 = new ImageView(getActivity());
    view1.setImageDrawable(getResources().getDrawable(R.mipmap.view_page));
    ImageView view2 = new ImageView(getActivity());
    view2.setImageDrawable(getResources().getDrawable(R.mipmap.home2));
    view2.setScaleType(ImageView.ScaleType.CENTER_CROP);
    ImageView view3 = new ImageView(getActivity());
    view3.setImageDrawable(getResources().getDrawable(R.mipmap.home1));
    view3.setScaleType(ImageView.ScaleType.CENTER_CROP);
    list.add(view1);
    list.add(view2);
    list.add(view3);
}

/**
 *   开启自动滚动的方法
 */
private void startAutoPlay() {
    isAutoPlay = true;
    handler.removeCallbacks(task);
    handler.postDelayed(task, delayTime);
}

/**
 * 暂停自动滚动
 */
public void pauseAutoPlay() {
    isAutoPlay = false;
    handler.removeCallbacks(task);
}
/**
 * 自动滚动核心代码
 */
private final Runnable task = new Runnable() {
    @Override
    public void run() {
        if (isAutoPlay) {
            // 自动滚动逻辑处理
            currentItem = viewPager.getCurrentItem();
            currentItem++;
            if(currentItem == homeViewPagerAdapter.getCount()) {
                currentItem = 0;
                viewPager.setCurrentItem(currentItem);
                handler.postDelayed(this, delayTime);
            } else {
                viewPager.setCurrentItem(currentItem);
                handler.postDelayed(this, delayTime);
            }
        } else {
            handler.postDelayed(this, delayTime);
        }
    }
};

private Runnable runable = new Runnable() {
    @Override
    public void run() {
        //true表示平滑滚动
        viewPager.setCurrentItem(viewPager.getCurrentItem() + 1, true);
    }
};
public void startScroll() {
    timerTask = new TimerTask() {
        @Override
        public void run() {
            hander.post(runable);
        }
    };
    timer.schedule(timerTask, DISPLAY_TIME, DISPLAY_TIME);
}
public void stopScroll() {
    timerTask.cancel();
    timerTask = null;
}

　　

　　

HomeViewPagerAdapter：

public class HomeViewPagerAdapter extends PagerAdapter {

    private List<ImageView> list;

    public HomeViewPagerAdapter(List<ImageView> list) {
        this.list = list;
    }

    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view == object;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        container.removeView(list.get(position));
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        container.addView(list.get(position));
        return list.get(position);
    }
}

　　

主要逻辑就是使用Handler的postDelay（）方法，不断得到viewpager的当前页，然后+1，再用viewpager的setCurrent（）方法设置当前+1后的界面。