android-制作APP欢迎页面ViewPager

最新推荐文章于 2024-09-13 23:43:05 发布

原创最新推荐文章于 2024-09-13 23:43:05 发布 · 296 阅读

1 ·

CC 4.0 BY-SA版权

android 专栏收录该内容

7 篇文章

订阅专栏

本文介绍如何在Android应用中创建自定义PagerAdapter以实现ViewPager组件的功能。通过继承PagerAdapter并实现关键方法，可以轻松地为ViewPager提供不同的视图页面。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

首先，要创建一个　继承自PagerAdapter 的子类

package com.example.john.viewpagerdemo;

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

import java.util.List;

/**
 * Created by john on 16-9-6.
 */
public class ViewPagerAdapter extends PagerAdapter {



    private List<View> views;

    private Context context;


    public ViewPagerAdapter(){

    }

    public ViewPagerAdapter(List<View> views,Context context) {
        this.views = views;
        this.context = context;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {


        container.removeView(views.get(position));


    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
       container.addView(views.get(position));
        return views.get(position);
    }

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

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return (view==object);
    }
}

package com.example.john.viewpagerdemo;

import android.app.Activity;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;

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

/**
 * Created by john on 16-9-6.
 */
public class Guide extends Activity {

    private ViewPager vp;
    private ViewPagerAdapter viewPagerAdapter;
    private List<View> views;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.guide);
        //加载
        initViews();
    }

    private void initViews() {
        LayoutInflater inflater = LayoutInflater.from(this);
        views = new ArrayList<View>();
        views.add(inflater.inflate(R.layout.one,null));
        views.add(inflater.inflate(R.layout.two,null));
        views.add(inflater.inflate(R.layout.three,null));

        viewPagerAdapter = new ViewPagerAdapter(views,this);
        vp = (ViewPager)findViewById(R.id.viewPager);
        vp.setAdapter(viewPagerAdapter);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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/viewPager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#000000"
      >

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