Android 滑动引导页

package gongzibai.co.cc;

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.ViewGroup.LayoutParams;
import android.view.Window;
import android.widget.ImageView;

public class Fi1Activity extends
  Activity {

 private ViewPager viewPager;
 ArrayList<View> pageViews;
 private ImageView imageView;
 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.main,
      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(
     Fi1Activity.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());
 }

 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) {
   // TODO Auto-generated method stub
   return super
     .getItemPosition(object);
  }

  @Override
  public void destroyItem(
    View arg0, int arg1,
    Object arg2) {
   // TODO Auto-generated method stub
   ((ViewPager) arg0)
     .removeView(pageViews
       .get(arg1));
  }

  @Override
  public Object instantiateItem(
    View arg0, int arg1) {
   // TODO Auto-generated method stub
   ((ViewPager) arg0)
     .addView(pageViews
       .get(arg1));
   return pageViews.get(arg1);
  }

  @Override
  public void restoreState(
    Parcelable arg0,
    ClassLoader arg1) {
   // TODO Auto-generated method stub

  }

  @Override
  public Parcelable saveState() {
   // TODO Auto-generated method stub
   return null;
  }

  @Override
  public void startUpdate(
    View arg0) {
   // TODO Auto-generated method stub

  }

  @Override
  public void finishUpdate(
    View arg0) {
   // TODO Auto-generated method stub

  }
 }

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

  @Override
  public void onPageScrollStateChanged(
    int arg0) {
   // TODO Auto-generated method stub

  }

  public void onPageScrolled(
    int arg0, float arg1,
    int arg2) {
   // TODO Auto-generated method stub

  }

  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);
    }
   }
  }
 }
}