android通过向viewpage中添加listview来完成滑动效果(类似于qq滑动界面)

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewParent;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.SimpleAdapter;

public class PagerActivity extends Activity {
    ViewPager viewPager;
    ArrayList pagesArrayList;// 添加listview 然后传给MyPagerAdapter 充当媒介
    String[] strs;
    String[] strs2;
    ListView listView;
    Button button1;
    Button button2;
    Button button3;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_pager);
        iniParams();
        iniViews();

    }
    private void iniParams(){
        pagesArrayList=new ArrayList();
        strs=new String[]{"a","b","c","a","b","c","a","b","c"};
        strs2=new String[]{"1","2","3","1","2","3","1","2","3"};

    }
    private void iniViews(){
        viewPager=(ViewPager)findViewById(R.id.viewPager);
        //第一个页面的viewpager第1个page里的listview
        LayoutInflater layoutInflater=getLayoutInflater();

        listView=(ListView)
                (layoutInflater.inflate(R.layout.page,null).findViewById(R.id.listview));
        ArrayAdapter arrrayAdapter=new ArrayAdapter(this,android.R.layout.simple_list_item_1,strs);
        listView.setAdapter(arrrayAdapter);
        pagesArrayList.add(listView);

        //第个页面的viewpager第2个page里的listview
        listView=(ListView)
                (layoutInflater.inflate(R.layout.page,null).findViewById(R.id.listview));
        ArrayAdapter arrrayAdapter2=new ArrayAdapter(this,android.R.layout.simple_list_item_1,strs2);
        listView.setAdapter(arrrayAdapter2);
        pagesArrayList.add(listView);

        //第三个面的viewpager第3个page里的listview
        SimpleAdapter simpleAdapter3=new SimpleAdapter(this,getDatasForListView(),
                R.layout.listviewitem,new String[]{"title","image"},new int[]{R.id.textView,R.id.imageView});
        listView=(ListView)
                (layoutInflater.inflate(R.layout.page, null).findViewById(R.id.listview));
        listView.setAdapter(simpleAdapter3);
        pagesArrayList.add(listView);

        viewPager.setAdapter(new MyPagerAdapter(pagesArrayList));
        viewPager.setOnPageChangeListener(new MyOnPageChangeListener());
        viewPager.setCurrentItem(0);

        button1=(Button)findViewById(R.id.button1);
        button2=(Button)findViewById(R.id.button2);
        button3=(Button)findViewById(R.id.button3);
    }
    public List> getDatasForListView(){
        Log.e("3", "");
        List> listMaps=new ArrayList>();

        String[] strings=new String[]{"图片1","图片2","图片3"};
        int[] images=new int[]{R.drawable.p1,R.drawable.p1,R.drawable.p1};

        for(int i=0;i            listMaps.add(ListViewItemFactory.generate(new Object[]{strings[i],images[0]}));
        }
        return listMaps;
    }
    static class ListViewItemFactory{
        static Map generate(Object[] obj){
            Map map=new HashMap();
            map.put("title", obj[0]);
            map.put("image",obj[1]);
            return map;
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.pager, menu);
        return true;
    }
    public class MyPagerAdapter extends PagerAdapter {
        public List mListViews;

        public MyPagerAdapter(List mListViews) {
            this.mListViews = mListViews;
        }

        @Override
        public void destroyItem(View arg0, int arg1, Object arg2) {

            Log.d("destroyItem", ""+arg0+" "+arg1);
            ((ViewPager) arg0).removeView(mListViews.get(arg1));
        }
        @Override
        public int getCount() {
            return mListViews.size();
        }

        @Override
        public Object instantiateItem(View arg0, int arg1) {
            Log.d("instantiateItem", ""+arg0+" "+arg1);
            try {
                if(mListViews.get(arg1).getParent()==null)
                    ((ViewPager) arg0).addView(mListViews.get(arg1), 0); 
                else{
                    //  很难理解新添加进来的view会自动绑定一个父类，由于一个儿子view不能与两个父类相关，所以得解绑
                    //不这样做否则会产生 viewpager java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
// 还有一种方法是viewPager.setOffscreenPageLimit(3); 这种方法不用判断parent 是不是已经存在，但多余的listview不能被destroy
                    ((ViewGroup)mListViews.get(arg1).getParent()).removeView(mListViews.get(arg1));

                    ((ViewPager) arg0).addView(mListViews.get(arg1), 0);
                }
            } catch (Exception e) { 
                // TODO Auto-generated catch block 
                Log.d("parent=", ""+mListViews.get(arg1).getParent());
                e.printStackTrace(); 
            } 
            return mListViews.get(arg1);
        }

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

        @Override
        public void restoreState(Parcelable arg0, ClassLoader arg1) {
        }

        @Override
        public Parcelable saveState() {
            return null;
        }

        @Override
        public void startUpdate(View arg0) {
        }
    }
    class MyOnPageChangeListener implements OnPageChangeListener{

        @Override
        public   void onPageScrollStateChanged (int state){
            // TODO Auto-generated method stub

        }

        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
            // TODO Auto-generated method stub

        }
        Color preColor;
        @Override
        public void onPageSelected(int position) {
            // TODO Auto-generated method stub
            Log.d("page",  "pos="+position);
            switch(position)
            {
            case 0: //button1.setBackgroundColor(0x00FF00);break;
            case 1:// button1.setBackgroundColor(0xFF0000);break;
            case 2:
            }

        }

    }
}