实现ViewPager循环滑动

标签：des   style   http   io   os   ar   for   sp   2014   

在网上看了一些资料,然后自己改成功了

一.重写viewpagerAdapter

public class MyViewPagerAdapter extends PagerAdapter{

private int len; //没什么用

private Context mcontext;  

private ArrayList<View> mlist;    

public MyViewPagerAdapter(ArrayList<View> mlist) {   super();   this.mlist = mlist;   this.len=mlist.size();  }

 @Override  public int getCount() {   return Integer.MAX_VALUE;  }

 @Override  public boolean isViewFromObject(View arg0, Object arg1) {   return arg0==arg1;  }

 @Override  public void destroyItem(View container, int position, Object object) {   ((ViewPager) container).removeView(mlist.get(position%mlist.size()));  }

 @Override  public Object instantiateItem(ViewGroup container, int position) {   ((ViewPager)container).addView(mlist.get(position%mlist.size()), 0);          return mlist.get(position%mlist.size()); 

 } 

}

二.Activity写法 只写重点的几块

private ViewPager pager;
 private MyViewPagerAdapter adapter;
 private ArrayList<View> imgs;
 private ImageView studyImage;
 private String[] url;

@Override
 protected void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState);
  setContentView(R.layout.study_layout);
  initImageView();//加载图片
  initViewPager();//加载viewpager

}

private void initViewPager() {
  pager=(ViewPager)findViewById(R.id.study_viewPager);   
  adapter=new MyViewPagerAdapter(imgs);//别继承错了
  pager.setAdapter(adapter);
  pager.setOnPageChangeListener(this);//没什么用
  pager.setCurrentItem(imgs.size()*100);//这是重点
 }

//若图片为本地图片将url类型换成int[]即可(此处我用universal-imageloader加载图片)

private void initImageView() {
  imgs=new ArrayList<View>();
  url=new String[]{"http://images.china.cn/news/attachement/jpg/site3/20100420/8329526740659646910.jpg",
    "http://img3.imgtn.bdimg.com/it/u=4025283544,1801047183&fm=23&gp=0.jpg",
    "http://img2.xue163.com/pic28.nipic.com/20130418/4344061_132656658118_2.jpg",
    "http://news.xinhuanet.com/photo/2014-09/28/127047283_14119070573481n.jpg"};  
  for(String s:url){
   studyImage=new ImageView(this);
   studyImage.setScaleType(ScaleType.FIT_XY); 
   imageLoader.displayImage(s,studyImage,options);
   imgs.add(studyImage);
  }
 }

实现ViewPager循环滑动

标签：des   style   http   io   os   ar   for   sp   2014   

原文地址：http://www.cnblogs.com/iyuge/p/4003075.html