public class HelpAdapter extends PagerAdapter{        private Context context;        public HelpAdapter(Context context) {            this.context = context;        }        @Override        public int getCount() {            return list.size();        }        @Override        public boolean isViewFromObject(View view, Object object) {            return view==object;        }        @Override        public Object instantiateItem(ViewGroup container, int position) {        	 View view= LayoutInflater.from(context).inflate(R.layout.item_ad,null);             ImageView imv= (ImageView) view.findViewById(R.id.imv_ad_item);             ImageLoaderService.displayImage(options, imv,list.get(position));             container.addView(view);             return view;        }        @Override        public void destroyItem(ViewGroup container, int position, Object object) {            container.removeView((View) object);        }    }

private ImageView[] dotViews;    private LinearLayout ll_help_dot;    private void initDots() {        // TODO Auto-generated method stub        LinearLayout.LayoutParams mParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);        mParams.setMargins(smg.dip2px(4), 0, smg.dip2px(4), 0);        dotViews = new ImageView[list.size()];        for(int i = 0; i < list.size(); i++)        {            ImageView imv_dot = new ImageView(this);            imv_dot.setBackgroundResource(R.drawable.icon_weixuanzhong_2x_selector);            imv_dot.setLayoutParams(mParams);            if(i== 0)            {                imv_dot.setSelected(true);            }            else {                imv_dot.setSelected(false);            }            dotViews[i] = imv_dot;            ll_help_dot.addView(dotViews[i]);        }    }

更新

public class FlashActivity extends BaseActivity {    private ViewPager viewPageFlash;    private PagerAdapter pagerAdapter;    private List
    
      viewList;    private ImageView[] dotViews;    private LinearLayout ll_dot;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_flash);        viewPageFlash=findViewById(R.id.viewPageFlash);        viewList=new ArrayList<>();        initDots();        pagerAdapter=new PagerAdapter() {            @Override            public int getCount() {                return viewList.size();            }            @Override            public Object instantiateItem(ViewGroup container, int position) {                // TODO Auto-generated method stub                container.addView(viewList.get(position));                return viewList.get(position);            }            @Override            public boolean isViewFromObject(View view, Object object) {                return view == object;            }            @Override            public void destroyItem(ViewGroup container, int position, Object object) {                container.removeView((View) object);            }        };        viewPageFlash.setAdapter(pagerAdapter);        viewPageFlash.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {            @Override            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {            }            @Override            public void onPageSelected(int position) {                for(int i = 0; i < dotViews.length; i++)                {                    if(position == i)                    {                        dotViews[i].setSelected(true);                    }                    else {                        dotViews[i].setSelected(false);                    }                }            }            @Override            public void onPageScrollStateChanged(int state) {            }        });    }    private void initDots() {        // TODO Auto-generated method stub        ll_dot=findViewById(R.id.ll_dot);        LinearLayout.LayoutParams mParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);        DisplayMetrics displayMetrics=getResources().getDisplayMetrics();        mParams.setMargins(displayMetrics.densityDpi*4, 0, displayMetrics.densityDpi*4, 0);        dotViews = new ImageView[viewList.size()];        for(int i = 0; i < viewList.size(); i++)        {            ImageView imv_dot = new ImageView(this);            imv_dot.setBackgroundResource(R.drawable.ic_launcher_background);            imv_dot.setLayoutParams(mParams);            if(i== 0)            {                imv_dot.setSelected(true);            }            else {                imv_dot.setSelected(false);            }            dotViews[i] = imv_dot;            ll_dot.addView(dotViews[i]);        }    }    public void skip(View view) {        startActivity(new Intent(getContext(),MainActivity.class));    }}