无限轮播

来源：互联网发布：淘宝发货没有无需物流编辑：程序博客网时间：2024/05/10 05:03

public class MainActivityextends Activity {

   private ViewPager pager;
   private LinearLayout line;

   String[] str=new String[]{
           "http://imgs.juheapi.com/comic_xin/5559b86938f275fd560ad748.jpg",
           "http://imgs.juheapi.com/comic_xin/5559b87438f275fd560ae132.jpg",
           "http://imgs.juheapi.com/comic_xin/5559b8de38f275fd560b06b2.jpg",
           "http://imgs.juheapi.com/comic_xin/5559b87438f275fd560ae1ba.jpg"
   };
   private List<ImageView> list;
   Handler han=new Handler(){
       public void handleMessage(android.os.Message msg) {
           //获得Viepage当前所在的页吗索引值
           int item = pager.getCurrentItem();
           item++;
           pager.setCurrentItem(item);
           han.sendEmptyMessageDelayed(0, 2000);
       };
   };
   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);
       pager = (ViewPager)findViewById(R.id.pager);
       line = (LinearLayout)findViewById(R.id.Line);
       pager.setAdapter(new MyPagerAdapter(this,str));
       //pager.setCurrentItem(str.length*5000);
       inData();
       setPageChange();
   }
   private void setPageChange() {
       // TODO Auto-generated method stub
       pager.setOnPageChangeListener(new OnPageChangeListener(){
           @Override
           public void onPageSelected(int arg0) {
               // TODO Auto-generated method stub
               for (int i = 0; i < list.size(); i++){
                   if(i==arg0%str.length ){
                       list.get(i).setImageResource(R.drawable.dram);
                   }else{
                       list.get(i).setImageResource(R.drawable.draw2);
                   }
               }
               }

           @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
           }
       });
       han.sendEmptyMessageDelayed(0, 2000);
   }
   public void inData(){
       list = new ArrayList<ImageView>();
       list.clear();
       line.removeAllViews();
       for (int i = 0; i < str.length; i++) {
           ImageView imageView=new ImageView(this);
           if(i==0){
               imageView.setImageResource(R.drawable.dram);
           }
           else{
               imageView.setImageResource(R.drawable.draw2);
           }
           LayoutParams params=new LayoutParams(15,15);
           params.setMargins(5, 0, 5, 0);
           list.add(imageView);
           line.addView(imageView, params);
       }

   }

}

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

public class MyPagerAdapter extends PagerAdapter {
   public Context context;
   public String[] str;
   public MyPagerAdapter(Context context,String[] str){
       this.context=context;
       this.str=str;
   }
   @Override
   public int getCount() {
       // TODO Auto-generated method stub
       return Integer.MAX_VALUE;
   }

   @Override
   public boolean isViewFromObject(View arg0, Object arg1) {
       // TODO Auto-generated method stub
       return arg0==arg1;
   }
   @Override
   public Object instantiateItem(ViewGroup container, int position) {
       // TODO Auto-generated method stub
        ImageView imageview=new ImageView(context);
       imageview.setMaxHeight(150);
       imageview.setMaxWidth(300);
       BitmapUtils bitmap=new BitmapUtils(context);
       //bitmap.display(imageview, str[position]);
       bitmap.display(imageview, str[position%str.length]);
       container.addView(imageview);
       return imageview;
   }
   @Override
   public void destroyItem(ViewGroup container, int position, Object object) {
       // TODO Auto-generated method stub
       container.removeView((View) object);

   }
}

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle"
    >
    <corners
        android:radius="9dp"
        />
   <solid android:color="#f0f"/>
</shape>

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