android ViewPager实现页面左右切换效果

主界面viewpager.xml：

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<LinearLayout
android:id="@+id/linearLayout01"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<include android:id="@+id/item_header"
layout="@layout/item_header" />
<android.support.v4.view.ViewPager
android:id="@+id/guidePages"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>

</LinearLayout>

<LinearLayout
android:id="@+id/linearLayout01"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >

<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >

<LinearLayout
android:id="@+id/viewGroup"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginBottom="40dp"
android:gravity="center_horizontal"
android:orientation="horizontal" >

</LinearLayout>

</RelativeLayout>
</LinearLayout>
</FrameLayout>

处理ViewPager的类：MyGuideViewActivity.java

package com.example.wenandroid;

import java.util.ArrayList;

import android.app.Activity;
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.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.ViewGroup.LayoutParams;
import android.widget.ImageView;

/**
* Android实现左右滑动指引效果
* @Description: Android实现左右滑动指引效果

* @File: MyGuideViewActivity.java

* @Package com.test.guide

* @Author Hanyonglu

* @Date 2012-4-6 下午11:15:18

* @Version V1.0
*/
public class MyGuideViewActivity extends Activity {
private ViewPager viewPager;
private ArrayList<View> pageViews;
private ImageView imageView;
private ImageView[] imageViews;
// 包裹滑动图片LinearLayout
private ViewGroup main;
// 包裹小圆点的LinearLayout
private ViewGroup group;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// 设置无标题窗口
requestWindowFeature(Window.FEATURE_NO_TITLE);

LayoutInflater inflater = getLayoutInflater();
pageViews = new ArrayList<View>();
pageViews.add(inflater.inflate(R.layout.item05, null));
pageViews.add(inflater.inflate(R.layout.item06, null));
pageViews.add(inflater.inflate(R.layout.item01, null));
pageViews.add(inflater.inflate(R.layout.item02, null));
pageViews.add(inflater.inflate(R.layout.item03, null));
pageViews.add(inflater.inflate(R.layout.item04, null));

imageViews = new ImageView[pageViews.size()];
main = (ViewGroup)inflater.inflate(R.layout.viewpager, null);

group = (ViewGroup)main.findViewById(R.id.viewGroup);
viewPager = (ViewPager)main.findViewById(R.id.guidePages);

for (int i = 0; i < pageViews.size(); i++) {
imageView = new ImageView(MyGuideViewActivity.this);
imageView.setLayoutParams(new LayoutParams(20,20));
imageView.setPadding(20, 0, 20, 0);
imageViews[i] = imageView;

if (i == 0) {
//默认选中第一张图片
imageViews[i].setBackgroundResource(R.drawable.page_indicator_focused);
} else {
imageViews[i].setBackgroundResource(R.drawable.page_indicator);
}

group.addView(imageViews[i]);
}

setContentView(main);

viewPager.setAdapter(new GuidePageAdapter());
viewPager.setOnPageChangeListener(new GuidePageChangeListener());
}

// 指引页面数据适配器
class GuidePageAdapter extends PagerAdapter {

@Override
public int getCount() {
return pageViews.size();
}

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

@Override
public int getItemPosition(Object object) {
return super.getItemPosition(object);
}

@Override
public void destroyItem(View arg0, int arg1, Object arg2) {
((ViewPager) arg0).removeView(pageViews.get(arg1));
}

@Override
public Object instantiateItem(View arg0, int arg1) {
((ViewPager) arg0).addView(pageViews.get(arg1));
return pageViews.get(arg1);
}

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

}

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

@Override
public void startUpdate(View arg0) {

}

@Override
public void finishUpdate(View arg0) {

}
}

// 指引页面更改事件监听器
class GuidePageChangeListener implements OnPageChangeListener {

@Override
public void onPageScrollStateChanged(int arg0) {

}

@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {

}

@Override
public void onPageSelected(int arg0) {
for (int i = 0; i < imageViews.length; i++) {
imageViews[arg0].setBackgroundResource(R.drawable.page_indicator_focused);

if (arg0 != i) {
imageViews[i].setBackgroundResource(R.drawable.page_indicator);
}
}
}
}
}

其中page_indicator_focused图片为：

，即当选中单个页面时，下标变红。

page_iindicator图片为：

，当未选中页面时，未选中的页面全部为黄色。