android pagerView

在玩qq聊天软件的时候都会用到这个效果，以前一直不知道，现在解决了。，主要要新建一个lib文件，里面还要导入android-support-04.jar文件

首先修改布局文件：

View Code

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:orientation="vertical"
 4     android:layout_width="fill_parent"
 5     android:layout_height="fill_parent">
 6 <android.support.v4.view.ViewPager
 7     android:layout_width="match_parent" 
 8     android:layout_height="120dp" 
 9     android:id="@+id/awesomepager"/>
10 </LinearLayout>

第二步：导入照片

第三步:修改AwesomePagerActivity.java文件解释都在代码里

View Code

  1 package cn.shaoyangjiang.com;
  2 
  3 import java.util.ArrayList;
  4 import java.util.List;
  5 import com.geekyouup.paug.awesomepager.R;
  6 import android.app.Activity;
  7 import android.os.Bundle;
  8 import android.os.Parcelable;
  9 import android.support.v4.view.PagerAdapter;
 10 import android.support.v4.view.ViewPager;
 11 import android.view.View;
 12 import android.widget.ImageView;
 13 
 14 public class AwesomePagerActivity extends Activity {
 15     //ViewPager实例化
 16     private ViewPager awesomePager;
 17     //实例化一个AwesomeAdapter
 18     private AwesomePagerAdapter awesomeAdapter;
 19     //实例化容器
 20     private List<View> mListViews;
 21     @Override
 22     public void onCreate(Bundle savedInstanceState) {
 23         super.onCreate(savedInstanceState);
 24         setContentView(R.layout.main);
 25         //创建awesomeAdapter
 26         awesomeAdapter = new AwesomePagerAdapter();
 27         //获得awesomePaper实例
 28         awesomePager = (ViewPager) findViewById(R.id.awesomepager);
 29         //绑定
 30         awesomePager.setAdapter(awesomeAdapter);       
 31         mListViews = new ArrayList<View>();
 32         //为mListViews添加四个组件
 33         mListViews.add(addImageView(R.drawable.katong));
 34         mListViews.add(addImageView(R.drawable.shan));
 35         mListViews.add(addImageView(R.drawable.touming));
 36         mListViews.add(addImageView(R.drawable.meinv));
 37         
 38     }
 39  // 定义添加ImageView的工具方法
 40     private View addImageView(int resId){
 41         ImageView imageView = new ImageView(this);
 42         imageView.setImageResource(resId);
 43         imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
 44         return imageView;
 45     }
 46     
 47     private class AwesomePagerAdapter extends PagerAdapter{    
 48         @Override
 49         public int getCount() {
 50             return mListViews.size();
 51         }
 52 
 53         /**
 54          * Create the page for the given position.  The adapter is responsible
 55          * for adding the view to the container given here, although it only
 56          * must ensure this is done by the time it returns from
 57          * {@link #finishUpdate()}.
 58          *
 59          * @param container The containing View in which the page will be shown.
 60          * @param position The page position to be instantiated.
 61          * @return Returns an Object representing the new page.  This does not
 62          * need to be a View, but can be some other container of the page.
 63 */
 64         @Override
 65         public Object instantiateItem(View collection, int position) {
 66 
 67             
 68             ((ViewPager) collection).addView(mListViews.get(position),0);
 69             
 70             return mListViews.get(position);
 71         }
 72 
 73         /**
 74          * Remove a page for the given position.  The adapter is responsible
 75          * for removing the view from its container, although it only must ensure
 76          * this is done by the time it returns from {@link #finishUpdate()}.
 77          *
 78          * @param container The containing View from which the page will be removed.
 79          * @param position The page position to be removed.
 80          * @param object The same object that was returned by
 81          * {@link #instantiateItem(View, int)}.
 82 */
 83         @Override
 84         public void destroyItem(View collection, int position, Object view) {
 85             ((ViewPager) collection).removeView(mListViews.get(position));
 86         }
 87         
 88         @Override
 89         public boolean isViewFromObject(View view, Object object) {
 90             return view==(object);
 91         }
 92         /**
 93          * Called when the a change in the shown pages has been completed.  At this
 94          * point you must ensure that all of the pages have actually been added or
 95          * removed from the container as appropriate.
 96          * @param container The containing View which is displaying this adapter's
 97          * page views.
 98 */
 99         @Override
100         public void finishUpdate(View arg0) {}
101         
102 
103         @Override
104         public void restoreState(Parcelable arg0, ClassLoader arg1) {}
105 
106         @Override
107         public Parcelable saveState() {
108             return null;
109         }
110 
111         @Override
112         public void startUpdate(View arg0) {}
113         
114     }
115       
116 }

效果图：

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