Android ViewPager实现无限循环轮播广告位Banner效果

<com.youth.banner.Banner
      xmlns:app="http://schemas.android.com/apk/res-auto"
      android:id="@+id/banner"
      android:layout_width="match_parent"
      android:layout_height="140dp"
      app:image_scale_type="center_crop"
      app:default_image="@drawable/home"
      app:indicator_drawable_selected="@drawable/selected_radius"
      app:indicator_drawable_unselected="@drawable/unselected_radius"
      app:indicator_height="8dp"
      app:indicator_width="8dp"
      app:indicator_margin="6dp"/>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
 android:shape="oval">
 <solid android:color="@color/color_e91e63" />
</shape>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
 android:shape="oval">
 <solid android:color="#80ffffff" />
</shape>

 Banner banner= (Banner) view.findViewById(R.id.banner);
  String url1="http://xxx.xxx.xxx.jpg";
  String url2="http://xxx.xxx.xxx.jpg";
  String url3="http://xxx.xxx.xxx.jpg";
  String[] images= new String[] {url1,url2,url3};

  banner.setBannerStyle(BannerConfig.CIRCLE_INDICATOR);
  banner.setImages(images);
  banner.setDelayTime(2000);