VP无限轮播

public class MainActivity extends Activity {    private ViewPager  viewPager;    private MyAdapter adapter;    private List<View> viewList;    private LayoutInflater layoutInflater;    private LinearLayout layout;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        viewPager=(ViewPager) findViewById(R.id.viewpager);        layout=(LinearLayout) findViewById(R.id.linearlayout);        initView();        //发送消息        myHandler.sendEmptyMessage(1);    }/** * 初始化视图 */    public void initView() {        viewList=new ArrayList<View>();        layoutInflater=LayoutInflater.from(MainActivity.this);        View view1=layoutInflater.inflate(R.layout.item, null);        view1.setBackgroundResource(R.drawable.meinv1);        View view2=layoutInflater.inflate(R.layout.item, null);        view2.setBackgroundResource(R.drawable.meinv2);        View view3=layoutInflater.inflate(R.layout.item, null);        view3.setBackgroundResource(R.drawable.meinv3);        View  view4=layoutInflater.inflate(R.layout.item, null);        view4.setBackgroundResource(R.drawable.meinv4);        viewList.add(view1);        viewList.add(view2);        viewList.add(view3);        viewList.add(view4);        adapter=new MyAdapter(viewList);        viewPager.setAdapter(adapter);        viewPager.setOnPageChangeListener(new OnPageChangeListener() {            @Override            public void onPageSelected(int arg0) {                // TODO Auto-generated method stub                //将arg0换算到viewList的索引范围之内                int position=arg0%viewList.size();                 //遍历所有的点对应的ImageView ，判断点的索引是否跟ViewPager当前的索引一致                for(int i=0;i<layout.getChildCount();i++){                    ImageView imageView=(ImageView) layout.getChildAt(i);                    if(i==position){                        imageView.setSelected(true);                    }else{                        imageView.setSelected(false);                    }                }            }            @Override            public void onPageScrolled(int arg0, float arg1, int arg2) {                // TODO Auto-generated method stub            }            public void onPageScrollStateChanged(int arg0) {                // TODO Auto-generated method stub            }        });        //添加下面的圆点        for(int i=0;i<viewList.size();i++){            //动态实例化ImageView对象，添加到LinearLayout里面            ImageView imageView=new ImageView(MainActivity.this);            //手动代码设置间距            LinearLayout.LayoutParams params=new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);            params.setMargins(5, 0, 5, 0);            //将当前属性设置给ImageView            imageView.setLayoutParams(params);            //给ImageView设置显示资源            imageView.setBackgroundResource(R.drawable.item_selector);            //将ImageView添加到LinearLayout里面            layout.addView(imageView);            //设置默认选中第一个            if(i==0){                imageView.setSelected(true);            }        }    }/** * 更新显示UI */    public Handler myHandler =new Handler(){        @Override        public void handleMessage(Message msg) {            // TODO Auto-generated method stub            super.handleMessage(msg);             switch(msg.what){             case 1:                 //获得ViewPager当前索引                 int index=viewPager.getCurrentItem();                 //当前页卡索引加1                 //设置当前显示页卡                 viewPager.setCurrentItem(index+=1);                 //延迟发送消息，调用自己                 myHandler.sendEmptyMessageDelayed(1, 2000);                 break;             }          }       };}

public class MyAdapter extends PagerAdapter{    List<View> mList;    public MyAdapter(List<View> list){        mList=list;    }    @Override    public void destroyItem(ViewGroup container, int position, Object object) {        // TODO Auto-generated method stub        //将索引控制在mList索引范围之内           position=position%mList.size();          container.removeView(mList.get(position));    }    @Override    public Object instantiateItem(ViewGroup container, int position) {        //将索引控制在mList范围之内        position=position%mList.size();        // TODO Auto-generated method stub        container.addView(mList.get(position));        return  mList.get(position);    }    @Override    public int getCount() {        // TODO Auto-generated method stub        return Integer.MAX_VALUE;//最大的整数值    }    @Override    public boolean isViewFromObject(View arg0, Object arg1) {        // TODO Auto-generated method stub        return arg0==arg1;    }}

//XML布局

<android.support.v4.view.ViewPager        android:id="@+id/viewpager"        android:layout_width="wrap_content"        android:layout_height="wrap_content" >    </android.support.v4.view.ViewPager>    <LinearLayout        android:id="@+id/linearlayout"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentBottom="true"        android:layout_centerHorizontal="true"        >    </LinearLayout>

//小圆点样式

<selector xmlns:android="http://schemas.android.com/apk/res/android">    <item android:drawable="@drawable/over_select" android:state_selected="true"></item>    <item android:drawable="@drawable/over_normal" android:state_selected="false"></item>    </selector>

//选中

<shape xmlns:android="http://schemas.android.com/apk/res/android"     android:shape="oval">    <!-- 描边 -->    <stroke android:color="#ffffff"        android:width="1dp"/>    <!-- 填充 -->    <solid android:color="#ff0000"/>    <size android:width="10dp"        android:height="10dp"/></shape>

//空白

<shape xmlns:android="http://schemas.android.com/apk/res/android"    android:shape="oval" >    <!-- 描边 -->    <stroke android:color="#ffffff"        android:width="1dp"/>    <!-- 填充 -->    <solid android:color="#000000"/>    <size android:width="10dp"        android:height="10dp"/></shape>