Android ViewPager实现选项卡切换

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  tools:context=".MainActivity" >



  <android.support.v4.view.ViewPager
    android:id="@+id/viewpager"
    android:layout_height="wrap_content"
    android:layout_width="wrap_content"
    
    >
    <android.support.v4.view.PagerTabStrip
      android:id="@+id/tabstrip"
      android:layout_height="wrap_content"
    android:layout_width="wrap_content"
      />
      
  </android.support.v4.view.ViewPager>
</RelativeLayout>

package com.example.viewpager;

import java.util.ArrayList;

import android.os.Bundle;
import android.app.Activity;
import android.graphics.Color;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.PagerTabStrip;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;

public class MainActivity extends Activity implements OnPageChangeListener {

  private ViewPager viewpager;
  private PagerTabStrip tabstrip;
  private String[] title={"首页","新闻","公告","图片"};
  private ArrayList<View> views=new ArrayList<View>();
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    viewpager=(ViewPager) findViewById(R.id.viewpager);
    tabstrip=(PagerTabStrip) findViewById(R.id.tabstrip);
    initial();
    viewpager.setAdapter(new MyPagerAdapter());
  }

  public void initial(){
    views.add(getLayoutInflater().inflate(R.layout.layout1,null));
    views.add(getLayoutInflater().inflate(R.layout.layout2,null));
    views.add(getLayoutInflater().inflate(R.layout.layout1,null));
    views.add(getLayoutInflater().inflate(R.layout.layout2,null));
    
    tabstrip.setBackgroundColor(getResources().getColor(android.R.color.holo_blue_light));
    tabstrip.setTabIndicatorColor(getResources().getColor(android.R.color.holo_blue_bright));
    tabstrip.setTextColor(Color.WHITE);
    viewpager.setOnPageChangeListener(this);
  }
  class MyPagerAdapter extends PagerAdapter{

  @Override
  public int getCount() {
    // TODO 自动生成的方法存根
    return views.size();
  }
  
  @Override
  public Object instantiateItem(ViewGroup container, int position) {
    View v=views.get(position);
    container.addView(v);
    return v;
  }

  @Override
  public void destroyItem(ViewGroup container, int position, Object object) {
    // TODO 自动生成的方法存根
    //super.destroyItem(container, position, object);
    container.removeView(views.get(position));
  }
  @Override
  public boolean isViewFromObject(View arg0, Object arg1) {
    // TODO 自动生成的方法存根
    return arg0==arg1;
  }
  @Override
  public CharSequence getPageTitle(int position) {
    // TODO 自动生成的方法存根
    return title[position];
  }
    
  }
@Override
public void onPageScrollStateChanged(int arg0) {
  // TODO 自动生成的方法存根
  
}

@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
  // TODO 自动生成的方法存根
  
}

@Override
public void onPageSelected(int arg0) {
  // TODO 自动生成的方法存根
  //Toast.makeText(MainActivity.this,"新年快乐",Toast.LENGTH_SHORT).show();
}
  
}