开发Banner(轮播图)

打开GitHub找banner库

搜索banner

点击第一个
https://github.com/youth5201314/banner

按照使用API开始开发

添加依赖

implementation 'io.github.youth5201314:banner:2.2.3'

添加权限（针对网络图片）

<!-- if you want to load images from the internet -->
<uses-permission android:name="android.permission.INTERNET" /> 

Banner UI界面

<com.youth.banner.Banner  
    android:id="@+id/banner_id"  
    android:layout_width="match_parent"  
    android:layout_height="300dp"  
/>

创建Banner对象

创建BannerDataInfo.java文件

package com.hxtx.august.MyObject;  
  
public class BannerDataInfo {  
    private int img;  
    private String title;  

    public BannerDataInfo(int img, String title) {  
    this.img = img;  
    this.title = title;  
    }  

    public int getImg() {  
    return img;  
    }  

    public void setImg(int img) {  
    this.img = img;  
    }  

    public String getTitle() {  
    return title;  
    }  

    public void setTitle(String title) {  
    this.title = title;  
    }  
}

显示Banner

/*轮播图*/  
Banner bannerView = findViewById(R.id.banner_id);  
List<BannerDataInfo> BannerDataInfo = new ArrayList<>();  
BannerDataInfo.add(new BannerDataInfo(R.mipmap.banner1, "标题1"));  
BannerDataInfo.add(new BannerDataInfo(R.mipmap.banner2, "标题2"));  
BannerDataInfo.add(new BannerDataInfo(R.mipmap.banner3, "标题3"));  
bannerView.setAdapter(new BannerImageAdapter<BannerDataInfo>(BannerDataInfo) {  
    @Override  
    public void onBindView(BannerImageHolder holder, BannerDataInfo data, int position, int size) {  
        // 设置数据（本地图片）  
        holder.imageView.setImageResource(data.getImg());  
}  
}).addBannerLifecycleObserver(this)  
.setIndicator(new CircleIndicator(requireContext()));