ViewPager实现广告轮播图

转帖请注明本文出自weimeig的博客（https://blog.csdn.net/weimeig/article/details/80242315），请尊重他人的辛勤劳动成果，谢谢

一、定义本地数据源DataUtil类，为轮播图提供数据源。

DataUtil.java

package com.administrator.taolvyou.util;

import android.content.Context;
import android.widget.ImageView;

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

/**
 * 数据源
 * Created by Administrator on 2018/5/8.
 */
public class DataUtil {
        /**
         * @param context
         * @param icons
         * @return
         */
        public static List<ImageView> getHeaderAddInfo(Context context, int icons[]) {
            List<ImageView> datas = new ArrayList<>();
            for (int i = 0; i < icons.length; i++) {
                ImageView icon = new ImageView(context);
                icon.setScaleType(ImageView.ScaleType.CENTER_CROP);
                icon.setImageResource(icons[i]);
                datas.add(icon);
            }
            return datas;
        }
}

二、为界面和数据之间添加适配器

MainHeaderAdAdapter.java

package com.administrator.taolvyou.adapter;

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

import java.util.List;

/**
 * Created by Administrator on 2018/5/8.
 */

public class MainHeaderAdAdapter extends PagerAdapter {
    protected Context context;
    protected List<ImageView> images;
    public MainHeaderAdAdapter(Context context, List<ImageView> images){
        this.context=context;
        this.images=images;
    }
    @Override
    public int getCount() {
        //对数据作非空判断
        return null!=images?images.size():0;
    }

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

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

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        container.removeView(images.get(position));
    }
}

三、编写布局文件

fragment_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent"
    >

    <android.support.v4.view.ViewPager
        android:id="@+id/vpager_main_header_ad"
        android:layout_width="match_parent"
        android:layout_height="120dp">

    </android.support.v4.view.ViewPager>
    <include
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        layout="@layout/main_search"
        />
    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@mipmap/nav_header_index"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="80dp"
        />
</RelativeLayout>

main_search.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center">

    <!--扫一扫-->
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:gravity="center"
        android:layout_marginLeft="10dp"
        >
        <ImageView
            android:layout_width="24dp"
            android:layout_height="24dp"
            android:src="@mipmap/main_scan"/>
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="扫一扫"
            android:textColor="#ffffff"
            android:textSize="20sp"/>


    </LinearLayout>

    <!--搜索-->
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="48dp"
        android:orientation="horizontal"
        android:layout_weight="1"
        android:background="@mipmap/main_header_sourch"
        android:gravity="center"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp">

        <ImageView
            android:layout_width="24dp"
            android:layout_height="24dp"
            android:src="@mipmap/search"


            />
        <EditText
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:hint="目的地/景点/酒店/门票"
            android:background="@null"
            android:textSize="18sp"/>


    </LinearLayout>

    <!--消息-->
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:gravity="center"
        android:layout_marginRight="10dp">
        <ImageView
            android:layout_width="24dp"
            android:layout_height="24dp"
            android:src="@mipmap/news"/>
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="消息"
            android:textColor="#ffffff"
            android:textSize="20sp"/>


    </LinearLayout>

</LinearLayout>

如果xml文件的地方，图片处报红，请下载本文配套代码，从中提取该图片

四、Java代码中调用

MainHeaderAdAdapter.java

package com.administrator.taolvyou.fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.administrator.taolvyou.R;
import com.administrator.taolvyou.adapter.MainHeaderAdAdapter;
import com.administrator.taolvyou.util.DataUtil;


/**
 * 主界面视图
 */
public class MainFragment extends Fragment{

    protected  int [] icons={R.mipmap.header_pic_ad1, R.mipmap.header_pic_ad2,R.mipmap.header_pic_ad1};
    protected ViewPager mVPagerHeaderAd;//广告头
    
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_main,container,false);
    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        mVPagerHeaderAd= (ViewPager) getView().findViewById(R.id.vpager_main_header_ad);
        
        MainHeaderAdAdapter adapter=new MainHeaderAdAdapter(getActivity(), DataUtil.getHeaderAddInfo(getActivity(),icons));
        mVPagerHeaderAd.setAdapter(adapter);
    }
}

运行效果：

项目Demo下载

https://download.csdn.net/download/weimeig/10400834