ViewPager实现多页面滑动

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使用ViewPager可以实现多页面滑动，比如查看多张图片时，以及打开App时的引导页等
下面是一个案例，需要注意的是，ViewPager要导入一个包android.support.v4.view.ViewPager

布局文件代码

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    >    <android.support.v4.view.ViewPager        android:id="@+id/viewpag        android:layout_width="match_parent"     android:layout_height="match_parent"        >    </android.support.v4.view.ViewPager> <LinearLayout      android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:orientation="horizontal"     android:layout_gravity="bottom"     >     <ImageView          android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:src="@drawable/point_h"         android:padding="15dip"         />     <ImageView          android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:src="@drawable/point_b"           android:padding="15dip"         />     <ImageView          android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:src="@drawable/point_b"           android:padding="15dip"         />     <ImageView          android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:src="@drawable/point_b"           android:padding="15dip"         /> </LinearLayout></LinearLayout>

ViewPagerDemoActivity代码

package tth.ff;import java.util.ArrayList;import java.util.List;import android.app.Activity;import android.os.Bundle;import android.support.v4.view.ViewPager;import android.view.View;import android.view.ViewGroup.LayoutParams;import android.widget.ImageView;public class ViewPagerDemoActivity extends Activity {    private ViewPager viewpager;       private List<View> views;    private ViewPagerAdapter adapter;    private int[] guideImages={R.drawable.me,R.drawable.jie,R.drawable.ying};    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        initView();        initData();    }    /**     * 初始化View     */    private void initView(){        viewpager= (ViewPager)findViewById(R.id.viewpager);        adapter=new ViewPagerAdapter(views);        views=new ArrayList<View>() ;        adapter=new ViewPagerAdapter(views);    }    /**     * 初始化数据     */    private void initData(){        LayoutParams layoutParams=new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT);        for(int i:guideImages){            ImageView imageView= new ImageView(this);            imageView.setImageResource(i);            imageView.setLayoutParams(layoutParams);            views.add(imageView);        }        viewpager.setAdapter(adapter);    }}

ViewPagerAdapter代码

package tth.ff;import java.util.List;import android.support.v4.view.PagerAdapter;import android.support.v4.view.ViewPager;import android.view.View;import android.view.ViewGroup;public class ViewPagerAdapter extends PagerAdapter {    private List<View> views;    public ViewPagerAdapter(List<View> views){        this.views=views;    }    @Override    public int getCount() {        // TODO Auto-generated method stub        return this.views.size();    }    @Override    public Object instantiateItem(ViewGroup container, int position) {        // TODO Auto-generated method stub        ((ViewPager)container).addView(views.get(position));        return views.get(position);    }    @Override    public boolean isViewFromObject(View arg0, Object arg1) {        // TODO Auto-generated method stub        return arg0==arg1;    }    @Override    public void destroyItem(ViewGroup container, int position, Object object) {         ((ViewPager)container).removeView(views.get(position));    }}

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