public class MainActivity extends AppCompatActivity {    private List<View> list;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        list= new ArrayList<View>();        /**         * 通过view对象作为viewpager的数据源         */        View view1=View.inflate(this,R.layout.view1,null);        View view2=View.inflate(this,R.layout.view2,null);        View view3=View.inflate(this,R.layout.view3,null);        View view4=View.inflate(this,R.layout.view4,null);        list.add(view1);        list.add(view2);        list.add(view3);        list.add(view4);        //创建pageadapter        Mypageadapter mypageadapter= new Mypageadapter(list);        //初始化viewpager        ViewPager pager= (ViewPager)findViewById(R.id.viewpager);        //加载适配器        pager.setAdapter(mypageadapter);    }}

public class Mypageadapter extends PagerAdapter {    private List<View> viewList;    public  Mypageadapter(List<View>viewList){        this.viewList=viewList;    }    //返回页卡的数量    @Override    public int getCount() {        return viewList.size();    }    //page是否来自于对象    @Override    public boolean isViewFromObject(View view, Object object) {        return view==object;    }    /*    * 实例化一个页卡    * */    @Override    public Object instantiateItem(ViewGroup container, int position) {        container.addView(viewList.get(position));        return viewList.get(position);    }    //销毁一个页卡    @Override    public void destroyItem(ViewGroup container, int position, Object object) {        container.removeView(viewList.get(position));    }}