ViewPager实现视图左右滑动

MainActivity.java文件

<span style="font-size:14px;">package com.example.viewpager;

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.Menu;
import android.view.MenuItem;
import android.view.View;

public class MainActivity extends Activity {

private List<View>viewList;
private ViewPager pager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mian);
viewList = new ArrayList<View>();
//通过View对象去作为ViewPager的数据源
View view1 = View.inflate(this, R.layout.view1, null);
View view2 = View.inflate(this, R.layout.view2, null);
View view3 = View.inflate(this, R.layout.view3, null);
View view4 = View.inflate(this, R.layout.view4, null);

viewList.add(view1);
viewList.add(view2);
viewList.add(view3);
viewList.add(view4);
//初始化ViewPager
pager = (ViewPager) findViewById(R.id.pager);
//创建PagerAdapter的适配器
MyPagerAdapter adapter = new MyPagerAdapter(viewList);

//ViewPager加载适配器
pager.setAdapter( adapter);

}
}

Main.xml文件

<span style="font-size:14px;"><?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
>

</android.support.v4.view.ViewPager>
</LinearLayout>

新建四个xml文件,分别是view1.xml view2.xml view3.xml view4.xml

<span style="font-size:14px;"><?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="第一个页面"
/>

</LinearLayout>

在和MainActivity.java文件的同级目录下，新建一个 MyPagerAdapter.java

<span style="font-size:14px;">package com.example.viewpager;

import java.util.List;

import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.view.ViewGroup;

public class MyPagerAdapter extends PagerAdapter{

private List<View>viewList;
public MyPagerAdapter(List<View>viewList)
{
this.viewList = viewList;
}
//返回页卡的数量
@Override
public int getCount() {
// TODO Auto-generated method stub
return viewList.size();
}

//view是否来自对象
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
// TODO Auto-generated method stub
return arg0==arg1;
}

//实例化一个页卡
@Override
public Object instantiateItem(ViewGroup container, int position) {
// TODO Auto-generated method stub
container.addView(viewList.get(position));
return viewList.get(position);
}

//销毁一个页卡
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
// TODO Auto-generated method stub
container.removeView(viewList.get(position));
}

}