Android使用ViewPager实现左右无限滑动

package com.viewpager; 
import java.util.ArrayList; 
import java.util.List; 
import android.os.Bundle; 
import android.support.v4.view.PagerAdapter; 
import android.support.v4.view.ViewPager; 
import android.support.v4.view.ViewPager.OnPageChangeListener; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.ImageView; 
import android.app.Activity; 
public class MainActivity01 extends Activity implements OnPageChangeListener { 
private ViewPager viewPager; 
static final int arrays[] = { R.drawable.guide1, R.drawable.guide2, 
R.drawable.guide3, R.drawable.guide4, R.drawable.guide5 }; 
private List<ImageView  views; 
private int currentPage = 0; 
private ImageView imageView; 
private MyViewPagerAdapter viewPagerAdapter; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.activity_main); 
initWidget(); 
} 
private void initWidget() { 
viewPager = (ViewPager) findViewById(R.id.viewpager); 
views = new ArrayList<ImageView (); 
for (int i = 0; i < 3; i++) { 
imageView = new ImageView(this); 
imageView.setLayoutParams(new ViewGroup.LayoutParams( 
ViewGroup.LayoutParams.MATCH_PARENT, 
ViewGroup.LayoutParams.MATCH_PARENT)); 
views.add(imageView); 
} 
initImageData(); 
viewPagerAdapter = new MyViewPagerAdapter(); 
viewPager.setAdapter(viewPagerAdapter); 
viewPager.setCurrentItem(1); 
viewPager.setOnPageChangeListener(this); 
} 
private void initImageData() { 
for (int i = 0; i < 3; i++) { 
imageView = views.get(i); 
if (i == 0) { 
imageView.setImageResource(arrays[arrays.length - 1]); 
} else { 
imageView.setImageResource(arrays[i - 1]); 
} 
} 
} 
class MyViewPagerAdapter extends PagerAdapter { 
@Override 
public int getCount() { 
// TODO Auto-generated method stub 
return views.size(); 
} 
@Override 
public boolean isViewFromObject(View arg0, Object arg1) { 
// TODO Auto-generated method stub 
return arg0 == arg1; 
} 
@Override 
public Object instantiateItem(ViewGroup container, int position) { 
imageView = views.get(position); 
container.addView(imageView); 
return imageView; 
} 
@Override 
public void destroyItem(ViewGroup container, int position, Object object) { 
// TODO Auto-generated method stub 
container.removeView((View) object); 
} 
} 
// 当滑动状态改变时调用 
@Override 
public void onPageScrollStateChanged(int state) { 
// TODO Auto-generated method stub 
System.out.println("--onPageScrollStateChanged--state--:" + state); 
switch (state) { 
// 在滚动完成后 
case ViewPager.SCROLL_STATE_IDLE: 
int currentItem = viewPager.getCurrentItem(); 
System.out.println("--currentItem--00--:" + currentItem); 
System.out.println("--currentPage--00--:" + currentPage); 
if (viewPager.getCurrentItem() == 1) { 
// 如果位置没有变终止循环 
break; 
} 
if (viewPager.getCurrentItem()   1) { 
currentPage++; 
} else { 
currentPage--; 
} 
System.out.println("--currentPage--11--:" + currentPage); 
if (currentPage == arrays.length) { 
currentPage = 0; 
} 
if (currentPage == -1) { 
currentPage = arrays.length - 1; 
} 
System.out.println("--currentPage--22--:" + currentPage); 
if (currentPage == 0) { 
views.get(0).setImageResource(arrays[arrays.length - 1]); 
} else { 
views.get(0).setImageResource(arrays[currentPage - 1]); 
} 
views.get(1).setImageResource(arrays[currentPage]); 
if (currentPage == arrays.length - 1) { 
views.get(2).setImageResource(arrays[0]); 
} else { 
views.get(2).setImageResource(arrays[currentPage + 1]); 
} 
viewPager.setCurrentItem(1, false); 
currentItem = viewPager.getCurrentItem(); 
System.out.println("--currentItem--11--:" + currentItem); 
break; 
} 
} 
// 当当前页面被滑动时调用 
@Override 
public void onPageScrolled(int position, float positionOffset, 
int positionOffsetPixels) { 
// TODO Auto-generated method stub 
// System.out.println("--onPageScrolled--position--:" + position); 
} 
// 当新的页面被选中时调用 
@Override 
public void onPageSelected(int position) { 
// TODO Auto-generated method stub 
System.out.println("--onPageSelected--position--:" + position); 
} 
}