安卓桌面分页

1.适配器：

package com.example.adapter;

import java.util.ArrayList;

import android.annotation.SuppressLint;
import android.app.ActionBar.LayoutParams;
import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.view.ViewGroup;

public class MyViewPagerAdapter extends PagerAdapter{
    private ArrayList<View>mlist;
    public MyViewPagerAdapter(ArrayList<View>mlist){
        super();
        this.mlist=mlist;
    }
    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return this.mlist==null?0:this.mlist.size();
    }

    @Override
    public boolean isViewFromObject(View arg0, Object arg1) {
        // TODO Auto-generated method stub
        return arg0==arg1;
    }
    public void destroyItem(ViewGroup container,int position,Object object){
        container.removeView(this.mlist.get(position));
    }
    @SuppressLint("NewApi")
    public Object instantiateItem(ViewGroup container,int position){
        LayoutParams lp=new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT);
        container.addView(this.mlist.get(position),lp);
        return this.mlist.get(position);
    }

}
2.activity：

package com.example.adapter;

import java.util.ArrayList;

import android.app.Activity;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.text.Layout;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;

public class ViewPageActivity extends Activity{
    private int[]imgs={
            R.drawable.bbe609315da7a9bfa65df713e7c168e0,
            R.drawable.bc494385774b8343123c5697ebeaeb9,
            R.drawable.dd6709ab53006f11f393e58f2ba614c4,
            R.drawable.e8d145de5ffdf97a4407ab4c5dd33513,
            R.drawable.eecfd0d328203e8a15366658231c3174
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.viewpagelayout);
        ViewPager viewPager=(ViewPager) findViewById(R.id.myPager);
        ArrayList<View>mlist=new ArrayList<View>();
        for(int i=0;i<imgs.length;i++){
            ImageView imgView=new ImageView(this);
            imgView.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT));
            imgView.setScaleType(ScaleType.FIT_XY);
            imgView.setImageResource(imgs[i]);
            mlist.add(imgView);
        }
        MyViewPagerAdapter adapter=new MyViewPagerAdapter(mlist);
        viewPager.setAdapter(adapter);
    }
    

}