ViewPager的使用

package com.example.viewpager;

import java.util.ArrayList;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
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.View;
import android.view.ViewGroup;
import android.widget.Toast;

public class MainActivity extends Activity {
	private ViewPager viewPager;
	private PagerTabStrip pagerTabStrip;
	private String[] titles = {"plane1", "plane2", "plane3"};
	private ArrayList<View> views = new ArrayList<View>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        viewPager = (ViewPager)findViewById(R.id.viewpager);
        pagerTabStrip = (PagerTabStrip)findViewById(R.id.pagertabstrip);
        initView();
        viewPager.setCurrentItem(titles.length/2);
        viewPager.setAdapter(new MyPagerAdapter());
        viewPager.setOnPageChangeListener(new OnPageChangeListener() {
			@Override
			public void onPageSelected(int i) {
				Toast.makeText(getApplicationContext(), "page--"+i, 
						Toast.LENGTH_SHORT).show();
			}
			
			@Override
			public void onPageScrolled(int arg0, float arg1, int arg2) {
			}
			
			@Override
			public void onPageScrollStateChanged(int arg0) {
			}
		});
    }
    
    private void initView(){
    	views.add(this.getLayoutInflater().inflate(R.layout.layout1, null));
    	views.add(this.getLayoutInflater().inflate(R.layout.layout2, null));
    	views.add(this.getLayoutInflater().inflate(R.layout.layout3, null));
    	
    	pagerTabStrip.setBackgroundColor(getResources().getColor
    			(android.R.color.holo_blue_bright));
    	pagerTabStrip.setTabIndicatorColor(getResources().getColor
    			(android.R.color.holo_red_dark));
    	pagerTabStrip.setTextColor(Color.BLACK);
    }
    
    class MyPagerAdapter extends PagerAdapter{
		@Override
		public int getCount() {
			return views.size();
		}

		@Override
		public Object instantiateItem(ViewGroup container, int position) {
			View view = views.get(position);
			container.addView(view);
			return view;
		}
		
		@Override
		public void destroyItem(ViewGroup container, int position, Object object) {
			container.removeView(views.get(position));
		}
		
		@Override
		public boolean isViewFromObject(View v, Object o) {
			return v==o;
		}

		@Override
		public CharSequence getPageTitle(int position) {
			return titles[position];
		}
    }
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/LinearLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.example.viewpager.MainActivity" >

    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#FF6600"
        android:layout_gravity="center" >
        
        <android.support.v4.view.PagerTabStrip 
            android:id="@+id/pagertabstrip"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="top" >
        </android.support.v4.view.PagerTabStrip>
        
    </android.support.v4.view.ViewPager>
    
</LinearLayout>