Android：轮播图ViewPager自动轮播最简单方法

2023-12-28 14:04| 来源: 网络整理| 查看: 265

由于博主学疏才浅，并未了解ViewPager底层逻辑，仅仅将可用的方法加以记录。最新版的使用轮播图，需要在xml文件中添加

之后编写方法

public class shouye extends Fragment { View view1,view2,view3,view4; private List viewList; ViewPager viewPager; private Spinner spinner; private ArrayAdapter adapter; @Nullable @Override public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_shouye, container, false); viewPager = (ViewPager) view.findViewById(R.id.indicator_all); inflater = getLayoutInflater(); view1 = inflater.inflate(R.layout.layout1, null); view2 = inflater.inflate(R.layout.layout2, null); view3 = inflater.inflate(R.layout.layout3, null); view4 = inflater.inflate(R.layout.layout4, null); viewList = new ArrayList();// 将要分页显示的View装入数组中 viewList.add(view1); viewList.add(view2); viewList.add(view3); viewList.add(view4); PagerAdapter pagerAdapter = new PagerAdapter() { @Override public boolean isViewFromObject(@NonNull View arg0, @NonNull Object arg1) { // TODO Auto-generated method stub return arg0 == arg1; } @Override public int getCount() { // TODO Auto-generated method stub return viewList.size(); } @Override public void destroyItem(ViewGroup container, int position, @NonNull Object object) { // TODO Auto-generated method stub container.removeView(viewList.get(position)); } @NonNull @Override public Object instantiateItem(ViewGroup container, int position) { // TODO Auto-generated method stub container.addView(viewList.get(position)); return viewList.get(position); } }; viewPager.setAdapter(pagerAdapter); mHandler.sendEmptyMessageDelayed(0, 1000*2); return view; } private Handler mHandler = new Handler() { public void handleMessage(Message msg) { int count = 4; int index=viewPager.getCurrentItem(); index=(index+1)%count; viewPager.setCurrentItem(index); mHandler.sendEmptyMessageDelayed(0, 1000*2); } }; }

图片的自动轮播参考了Android之ViewPager自动循环播放（轮播）效果实现（超简单）填充的资源文件中放置图片 layout_1

2022-3-22更如果需要在轮播图上加导航点，可参考这篇博客带有导航点的ViewPager

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