Android ViewPager实现无限循环的实例

<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" >    <android.support.v4.view.ViewPager     android:id="@+id/viewpager"     android:layout_width="match_parent"     android:layout_height="match_parent" >   </android.support.v4.view.ViewPager>    <LinearLayout     android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:layout_alignBottom="@id/viewpager"     android:background="#33000000"     android:orientation="vertical"     android:padding="5dip" >      <TextView       android:id="@+id/tv_image_description"       android:layout_width="wrap_content"       android:layout_height="wrap_content"       android:layout_gravity="center_horizontal"       android:text="第一个引导页面"       android:textColor="@android:color/white"       android:textSize="14sp" />      <LinearLayout       android:id="@+id/ll_points"       android:layout_width="wrap_content"       android:layout_height="wrap_content"       android:layout_marginTop="5dip"       android:layout_gravity="center_horizontal"       android:orientation="horizontal" >     </LinearLayout>   </LinearLayout>  </RelativeLayout> 

package com.example.viewpagertest;  import java.util.ArrayList; import java.util.List;  import android.app.Activity; 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;  public class MainActivity extends Activity implements OnPageChangeListener {    private List<ImageView> imageViewList;   private ViewPager mViewPager;     @Override   protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setView();     initView();   }    public void setView() {     setContentView(R.layout.activity_splash_viewpager);    }    public void initView() {     mViewPager = (ViewPager) findViewById(R.id.viewpager);     prepareData();          ViewPagerAdapter adapter = new ViewPagerAdapter();     mViewPager.setAdapter(adapter);     mViewPager.setOnPageChangeListener(this);   }       private void prepareData() {       imageViewList = new ArrayList<ImageView>();       int[] imageResIDs = getImageResIDs();       ImageView iv;       for (int i = 0; i < imageResIDs.length; i++) {         iv = new ImageView(this);         iv.setBackgroundResource(imageResIDs[i]);         imageViewList.add(iv);                }     }         /**    * 在此处本来是5张图片，现在在数组首尾各加了一张图    * @return    */     private int[] getImageResIDs() {       return new int[]{           R.drawable.pic_02,           R.drawable.bg1,           R.drawable.bg2,           R.drawable.bg3,           R.drawable.pic_01,           R.drawable.pic_02,           R.drawable.bg1,        };     }          class ViewPagerAdapter extends PagerAdapter {        @Override       public int getCount() {         return imageViewList.size();       }        /**        * 判断出去的view是否等于进来的view 如果为true直接复用        */       @Override       public boolean isViewFromObject(View arg0, Object arg1) {         return arg0 == arg1;       }        /**        * 销毁预加载以外的view对象, 会把需要销毁的对象的索引位置传进来就是position        */       @Override       public void destroyItem(ViewGroup container, int position, Object object) {         container.removeView(imageViewList.get(position));       }        /**        * 创建一个view        */       @Override       public Object instantiateItem(ViewGroup container, int position) {         container.addView(imageViewList.get(position));         return imageViewList.get(position);       }     }      @Override     public void onPageScrollStateChanged(int arg0) {            }      @Override     public void onPageScrolled(int arg0, float arg1, int arg2) {            }      @Override     public void onPageSelected(int position) {       if ( imageViewList.size() > 1) { //多于1，才会循环跳转         if ( position < 1) { //首位之前，跳转到末尾（N）           position = 5;            mViewPager.setCurrentItem(position,false);         } else if ( position > 5) { //末位之后，跳转到首位（1）           mViewPager.setCurrentItem(1,false); //false:不显示跳转过程的动画           position = 1;         }       }       }    @Override   protected void onDestroy() {     super.onDestroy();   }  } 

mViewPager.setCurrentItem(1,false); //false:不显示跳转过程的动画