Android的 ViewPager 简单运用

说明：

ViewPager用于实现多页面的切换效果，该类存在于Google的兼容包里面，所以在引用时记得在BuilldPath中加入“android-support-v4.jar”

主布局文件

main.xml

<?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:orientation="vertical" >    <android.support.v4.view.ViewPager        android:id="@+id/viewpager"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center" >        <android.support.v4.view.PagerTitleStrip            android:id="@+id/pagertitle"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_gravity="top" />    </android.support.v4.view.ViewPager></LinearLayout>

其中ViewPager为多页显示控件，PagerTitleStrip用于显示当前页面的标题

主窗口代码：

PagerTitleDemoActivity.java

package com.ns.pager;import java.util.ArrayList;import android.app.Activity;import android.os.Bundle;import android.support.v4.view.PagerAdapter;import android.support.v4.view.PagerTitleStrip;import android.support.v4.view.ViewPager;import android.view.LayoutInflater;import android.view.View;public class PagerTitleDemoActivity extends Activity {    /** Called when the activity is first created. */private ViewPager mViewPager;private PagerTitleStrip mPagerTitleStrip;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        mViewPager = (ViewPager)findViewById(R.id.viewpager);        mPagerTitleStrip = (PagerTitleStrip)findViewById(R.id.pagertitle);                //将要分页显示的View装入数组中        LayoutInflater mLi = LayoutInflater.from(this);        View view1 = mLi.inflate(R.layout.view1, null);        View view2 = mLi.inflate(R.layout.view2, null);        View view3 = mLi.inflate(R.layout.view3, null);                //每个页面的Title数据        final ArrayList<View> views = new ArrayList<View>();        views.add(view1);        views.add(view2);        views.add(view3);                final ArrayList<String> titles = new ArrayList<String>();        titles.add("tab1");        titles.add("tab2");        titles.add("tab3");                //填充ViewPager的数据适配器        PagerAdapter mPagerAdapter = new PagerAdapter() {@Overridepublic boolean isViewFromObject(View arg0, Object arg1) {return arg0 == arg1;}@Overridepublic int getCount() {return views.size();}@Overridepublic void destroyItem(View container, int position, Object object) {((ViewPager)container).removeView(views.get(position));}@Overridepublic CharSequence getPageTitle(int position) {return titles.get(position);}@Overridepublic Object instantiateItem(View container, int position) {((ViewPager)container).addView(views.get(position));return views.get(position);}};mViewPager.setAdapter(mPagerAdapter);    }}

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