轮播banner（自带小圆点）

先导进去jar包
compile 'com.youth.banner:banner:1.4.9'
compile 'com.github.bumptech.glide:glide:3.7.0'

//这个类必须写

public class ImageLoaderBanner extends ImageLoader {

    @Override
    public void displayImage(Context context, Object path, ImageView imageView) {
        Glide.with(context).load(path).into(imageView);
    }

}

//主类

public class MainActivity extends AppCompatActivity {
    private List list;
    private Banner banner;
    private String img1 = "http://img95.699pic.com/photo/50047/0111.jpg_wh300.jpg";
    private String img2 = "http://img95.699pic.com/photo/50039/0266.jpg_wh300.jpg!/format/webp";
    private String img3 = "http://img95.699pic.com/photo/50032/0608.jpg_wh300.jpg!/format/webp";
    private String img4 = "http://img95.699pic.com/photo/50048/2213.jpg_wh300.jpg!/format/webp";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

       //初始化控件

        banner = (Banner) findViewById(R.id.myBanner);

        banner.setImageLoader(new ImageLoaderBanner());

       //定义一个集合

        list = new ArrayList();
        list.add(img1);
        list.add(img2);
        list.add(img3);
        list.add(img4);
        banner.setImages(list);

      //开始

        banner.start();
    }

   }

          android:id="@+id/myBanner"
        android:layout_width="match_parent"

        android:layout_height="200dp"

     //布局文件中设置小圆点的大小

        app:indicator_height="20dp"
         app:indicator_width="20dp"    

     >