banner+Imageloader轮播图2

1.导入依赖

implementation 'com.youth.banner:banner:1.4.9'

2.布局

<com.youth.banner.Banner
android:id="@+id/banner"
android:layout_width="match_parent"
android:layout_height="180dp"/>

3.在Activity中写代码

public class MainActivity extends AppCompatActivity {

private Banner banner;
String[] urls = {"https://img-my.csdn.net/uploads/201407/26/1406383265_8550.jpg",
        "https://lh4.googleusercontent.com/--dq8niRp7W4/URquVgmXvgI/AAAAAAAAAbs/-gnuLQfNnBA/s160-c/A%252520Song%252520of%252520Ice%252520and%252520Fire.jpg",
        "https://lh5.googleusercontent.com/-7qZeDtRKFKc/URquWZT1gOI/AAAAAAAAAbs/hqWgteyNXsg/s160-c/Another%252520Rockaway%252520Sunset.jpg",
        "https://img-my.csdn.net/uploads/201407/26/1406383265_8550.jpg",
        "https://lh6.googleusercontent.com/-8HO-4vIFnlw/URquZnsFgtI/AAAAAAAAAbs/WT8jViTF7vw/s160-c/Antelope%252520Hallway.jpg",
        "https://lh4.googleusercontent.com/-WIuWgVcU3Qw/URqubRVcj4I/AAAAAAAAAbs/YvbwgGjwdIQ/s160-c/Antelope%252520Walls.jpg"};

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    banner = (Banner) findViewById(R.id.banner);
    final com.nostra13.universalimageloader.core.ImageLoader instance =
            com.nostra13.universalimageloader.core.ImageLoader.getInstance();

    /**
     * 给banner添加显示图片的框架;
     * 可以ImageLoader,gLide,Frescro;
     */

    banner.setImageLoader(new ImageLoader() {
        @Override
        public void displayImage(Context context, Object path, ImageView imageView) {
            instance.displayImage((String) path,imageView);
        }
    });
    //给轮播图设置图片地址;
    banner.setImages(Arrays.asList(urls));
    //让轮播图开始轮播
    banner.start();
}}

4.创建imageloade的外部类

/**
 * author:Created by WangZhiQiang on 2017-10-10.
 * 系统启动 会先运行这个MApp,所以我们在这里进行初始化 框架 组件等等;
 */

public class MApp extends Application{

@Override
public void onCreate() {
    super.onCreate();

    //初始化组件
    ImageLoaderConfiguration configuration = new ImageLoaderConfiguration.Builder(this).build();
    ImageLoader.getInstance().init(configuration);

}}

5.在清单文件中注册

android:name=".MApp"