ViewPager不同架構(gòu)方式的區(qū)別

由普通layout構(gòu)成的viewPager

一般用于展示類的頁(yè)面(如新的app打開出現(xiàn)的引導(dǎo)頁(yè))

activity_main.xml

定義適配器

package?com.example.administrator.viewpager;

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

import?java.util.List;

/**
?*?Created?by?Administrator?on?2015/7/22.
?*/
public?class?MyPagerAdapter?extends?PagerAdapter{
????private?ListviewList;
????private?ListtitleList;

????public?MyPagerAdapter(ListviewList,ListtitleList){
????????this.viewList?=?viewList;
????????this.titleList?=?titleList;
????}

????//返回viewPager的個(gè)數(shù)
????@Override
????public?int?getCount()?{
????????return?viewList.size();
????}


????//view?是否來(lái)源于對(duì)象
????@Override
????public?boolean?isViewFromObject(View?view,?Object?o)?{
????????return?view?==?o;
????}

????//實(shí)例化一個(gè)?頁(yè)卡
????@Override
????public?Object?instantiateItem(ViewGroup?container,?int?position)?{
????????container.addView(viewList.get(position));
????????return?viewList.get(position);
????}

????//銷毀一個(gè)?頁(yè)卡
????@Override
????public?void?destroyItem(ViewGroup?container,?int?position,?Object?object)?{
????????container.removeView(viewList.get(position));
????}

????@Override
????public?CharSequence?getPageTitle(int?position)?{
????????return?titleList.get(position);
????}
}

MainActivity.java

package?com.example.administrator.viewpager;

import?android.support.v4.view.ViewPager;
import?android.support.v7.app.ActionBarActivity;
import?android.os.Bundle;
import?android.view.Menu;
import?android.view.MenuItem;
import?android.view.View;
import?android.view.ViewParent;

import?java.util.ArrayList;
import?java.util.List;


public?class?MainActivity?extends?ActionBarActivity?{
????private?ListviewList;
????private?ListtitleList;

????@Override
????protected?void?onCreate(Bundle?savedInstanceState)?{
????????super.onCreate(savedInstanceState);
????????setContentView(R.layout.activity_main);

????????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?=?new?ArrayList();
????????viewList.add(view1);
????????viewList.add(view2);
????????viewList.add(view3);
????????viewList.add(view4);


????????titleList?=?new?ArrayList();
????????titleList.add("第一頁(yè)");
????????titleList.add("第二頁(yè)");
????????titleList.add("第三頁(yè)");
????????titleList.add("第四頁(yè)");

????????MyPagerAdapter?adapter?=?new?MyPagerAdapter(viewList,titleList);

????????ViewPager?viewPager?=?(ViewPager)findViewById(R.id.pager);
????????viewPager.setAdapter(adapter);
????}
}

由Fragment構(gòu)成的ViewPager1

使用FragmentPagerAdapter適配器（不會(huì)自動(dòng)銷毀超過(guò)三個(gè)的pager

MyFragmentPagerAdapter

package?com.example.administrator.viewpager;

import?android.support.v4.app.Fragment;
import?android.support.v4.app.FragmentManager;
import?android.support.v4.app.FragmentPagerAdapter;

import?java.util.List;

/**
?*?Created?by?Administrator?on?2015/7/22.
?*/
public?class?MyFragmentPagerAdapter?extends?FragmentPagerAdapter{

????private?ListfragmentList;
????private?ListtitleList;

????public?MyFragmentPagerAdapter(FragmentManager?fm,?ListfragmentList,ListtitleList)?{
????????super(fm);
????????this.fragmentList?=?fragmentList;
????????this.titleList?=?titleList;
????}

????@Override
????public?Fragment?getItem(int?i)?{
????????return?fragmentList.get(i);
????}

????@Override
????public?int?getCount()?{
????????return?fragmentList.size();
????}

????@Override
????public?CharSequence?getPageTitle(int?position)?{
????????return?titleList.get(position);
????}
}

MainActivity

MyFragmentPagerAdapter?adapter?=?new?MyFragmentPagerAdapter(getSupportFragmentManager(),fragmentList,titleList);
????????ViewPager?viewPager?=?(ViewPager)findViewById(R.id.pager);
????????viewPager.setAdapter(adapter);

由Fragment構(gòu)成的ViewPager2

使用FragmentStatePagerAdapter適配器（超過(guò)三個(gè)會(huì)自動(dòng)銷毀）

只需要適配器繼承FragmentStatePagerAdapter即可