Androidviewpager中动态添加view并实现伪无限循环的方法

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import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.view.ViewGroup;
import java.util.List;
/**
 * Created by cg on 2015/10/28.
 */
public class viewpageAdapter extends PagerAdapter {
  private List list_view;
  public viewpageAdapter(List list_view) {
    this.list_view = list_view;
  }
  @Override
  public int getCount() {
    return Integer.MAX_VALUE;
  }
  @Override
  public boolean isViewFromObject(View view, Object object) {
    return view==object;
  }
  @Override
  public Object instantiateItem(ViewGroup container, int position) {
    container.addView(list_view.get(position % list_view.size()));
    return list_view.get(position % list_view.size());
  }
  @Override
  public void destroyItem(ViewGroup container, int position, Object object) {
    container.removeView(list_view.get(position % list_view.size()));
  }
}

import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
/**
 * 动态在viewpager中添加view，并实现无限循环
 */
public class MainActivity extends AppCompatActivity {
  private ViewPager list_pager;
  private List list_view;
  private viewpageAdapter adpter;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    list_pager = (ViewPager)findViewById(R.id.list_pager);
    list_view = new ArrayList<>();
    //这里只设置了4.因为在实现应用中，我们在页面加载的时候，你会根据数据的多少，而知道这个页面的数量
    //一般情况下，我们会根据list<>或是string[]这样的数组的数量来判断要有多少页
    for(int i=0;i<4;i++)
    {
      View view = LayoutInflater.from(this).inflate(R.layout.fragment_page,null);
      TextView txt_num = (TextView)view.findViewById(R.id.txt_num);
      txt_num.setText(i + "");
      list_view.add(view);
    }
    adpter = new viewpageAdapter(list_view);
    list_pager.setAdapter(adpter);
    // 刚开始的时候 吧当前页面是先到最大值的一半 为了循环滑动
    int currentItem = Integer.MAX_VALUE / 2;
    // 让第一个当前页是 0
    //currentItem = currentItem - ((Integer.MAX_VALUE / 2) % 4);
    list_pager.setCurrentItem(currentItem);
  }
}