Android ViewPager的学习

Android ViewPager的学习

<?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

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() {                             @Override               public boolean isViewFromObject(View arg0, Object arg1) {                    return arg0 == arg1;               }                             @Override               public int getCount() {                    return views.size();               }               @Override               public void destroyItem(View container, int position, Object object) {                    ((ViewPager)container).removeView(views.get(position));               }               @Override               public CharSequence getPageTitle(int position) {                    return titles.get(position);               }               @Override               public Object instantiateItem(View container, int position) {                    ((ViewPager)container).addView(views.get(position));                    return views.get(position);               }          };                   mViewPager.setAdapter(mPagerAdapter);    }}