Android 轮播图实现

实现步骤：

1. 导入第三方banner库
2. 如何使用github开源库

---

• 在build.gradle下导入banner库

 //依赖banner
    implementation ("io.github.youth5201314:banner:2.2.2")

• 编写banner页面

<?xml version="1.0" encoding="utf-8"?>
<androidx.appcompat.widget.LinearLayoutCompat xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">


    <androidx.appcompat.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        app:title="轮播图"
        app:titleTextColor="@color/white"
        android:background="@color/my_light_primary"
        android:layout_height="wrap_content"/>


    <com.youth.banner.Banner
        android:id="@+id/banner"
        android:layout_width="match_parent"
        android:layout_height="200dp"/>


</androidx.appcompat.widget.LinearLayoutCompat>

• banner代码具体实现

public class MainActivity extends AppCompatActivity {
    
    
    private Banner mBanner;

    private List<BannerDataInfo> mBannerDataInfoList = new ArrayList<>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
    
    
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //初始化控件
        mBanner = findViewById(R.id.banner);


        //添加banner数据
        mBannerDataInfoList.add(new BannerDataInfo(R.mipmap.room_1, "这是客房一"));
        mBannerDataInfoList.add(new BannerDataInfo(R.mipmap.room_2, "这是客房二"));
        mBannerDataInfoList.add(new BannerDataInfo(R.mipmap.room_4, "这是客房三"));
        mBannerDataInfoList.add(new BannerDataInfo(R.mipmap.room_5, "这是客房四"));
        //设置适配器
        mBanner.setAdapter(new BannerImageAdapter<BannerDataInfo>(mBannerDataInfoList) {
    
    

            @Override
            public void onBindView(BannerImageHolder holder, BannerDataInfo data, int position, int size) {
    
    
                //设置数据
                holder.imageView.setImageResource(data.getImg());
            }
        });

        //添加生命周期观察者
        mBanner.addBannerLifecycleObserver(this);
        //设置指示器
        mBanner.setIndicator(new CircleIndicator(this));


        //banner点击事件
        mBanner.setOnBannerListener(new OnBannerListener<BannerDataInfo>() {
    
    
            @Override
            public void OnBannerClick(BannerDataInfo data, int position) {
    
    
                Toast.makeText(MainActivity.this, data.toString(), Toast.LENGTH_SHORT).show();
            }
        });

    }
}

• 效果图