ViewPager与radiogroup组成轮播和下面的圆点

来源：互联网发布：日语网络用语 ggk 编辑：程序博客网时间：2024/06/05 09:57

1,私有化控件

private ViewPager vp;
private RadioGroup rg;

2，handler 里设置无限轮播

private Handler handler = new Handler() {
       public void handleMessage(android.os.Message msg) {

               int currentItem = vp.getCurrentItem();
               vp.setCurrentItem(currentItem += 1);
               handler.sendEmptyMessageDelayed(0, 3000);

       }

   };

3主Activity里实现得到viepager的控件ID并设置适配器

设置viewpager的监听方法

private void initadapter() {
       // 设置圆点
       initdots();
       // 设置监听
       vp.setOnPageChangeListener(new OnPageChangeListener() {

           @Override
           public void onPageSelected(int arg0) {
               // TODO Auto-generated method stub
               rg.check(arg0 % ad1.size());
           }

           @Override
           public void onPageScrolled(int arg0, float arg1, int arg2) {
               // TODO Auto-generated method stub

           }

           @Override
           public void onPageScrollStateChanged(int arg0) {
               // TODO Auto-generated method stub

           }
       });
       vp.setCurrentItem(10000 / 2 - 10000 / 2
               % ad1.size());
       handler.sendEmptyMessageDelayed(0, 3000);

   };
     根据viewpager的数量设置要添加的圆点radioGroup
   private void initdots() {
       // TODO Auto-generated method stub
       int wrap = RadioGroup.LayoutParams.WRAP_CONTENT;
       RadioGroup.LayoutParams params = new RadioGroup.LayoutParams(wrap, wrap);
       params.leftMargin = 5;

       for (int i = 0; i < ad1.size(); i++) {
           RadioButton rb = new RadioButton(getActivity());
           rb.setId(i);

           rb.setButtonDrawable(R.drawable.x_dot_selector);
           if (i != 0) {
               rg.addView(rb, params);
           } else {
               rg.addView(rb);
           }
           rg.check(0);
       }
   }
//viewPager的适配器

Context context;
   List<Ad1> ad1;
   private BitmapUtils map;

   public MyHomePagerAdapter(Context context, List<Ad1> ad1) {
       // TODO Auto-generated constructor stub
       this.context = context;
       this.ad1 = ad1;
       map = new BitmapUtils(context);

   }

   @Override
   public int getCount() {
       // TODO Auto-generated method stub
       return 10000;
   }

   @Override
   public Object instantiateItem(ViewGroup container, int position) {
       //得到网络图片地址
       Ad1 ad=ad1.get(position%ad1.size());
       String path=ad.getImage();
       //得到imageView对象
       ImageView iv=new ImageView(context);
       LayoutParams params=new LayoutParams();
       params.width=LayoutParams.MATCH_PARENT;
       params.height=LayoutParams.MATCH_PARENT;
       iv.setLayoutParams(params);
       iv.setScaleType(ScaleType.FIT_XY);
       map.display(iv, path);
       container.addView(iv);
       return iv;
   }

   @Override
   public boolean isViewFromObject(View arg0, Object arg1) {
       // TODO Auto-generated method stub
       return arg0 == arg1;
   }

   @Override
   public void destroyItem(ViewGroup container, int position, Object object) {
       // TODO Auto-generated method stub
       container.removeView((View) object);
   }

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