Glide.with(mContext)
     .load(url)
     .centerCrop()
     .placeholder(R.drawable.default_img)
     .crossFade()
     .into(mImageView);

     Observable
                .just( "1" , "2" )
                .subscribeOn(Schedulers.io() )
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Action1<String>() {
                    @Override
                    public void call(String s) {

                    }
                }) ;

package com.app.lib;

/**
 * Created by ${zyj} on 2016/6/27.
 */
public class UserMoule {

    private String id ;
    private String name ;

    public UserMoule( String id , String name ){
        this.id = id ;
        this.name = name ;
    }

    static class Builder {
        private  String id ;
        private  String name ;

        public Builder setId(String id) {
            this.id = id;
            return this ;
        }

        public Builder setName(String name) {
            this.name = name;
            return this ;
        }

        public UserMoule create(){
            return new UserMoule( id , name ) ;
        }
    }

}

      new UserMoule.Builder()
                .setId( "id")
                .setName( "json")
                .create() ;