Use Retrofit to request network data and display it in Recyclerview

public class MainActivity extends AppCompatActivity {
    private RecyclerView mRecyclerView;

    @Override
protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);    
        setContentView(R.layout.activity_main);
        mRecyclerView=findViewById(R.id.recyclerview);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));

        MyApp.getmRetrofit()
                .create(FilmService.class)
                .getBean( 1 )
                .subscribeOn(Schedulers.io())
                .map(new Function<Bean, List<Bean.DataBean>>() {
                    @Override
public List<Bean.DataBean> apply(Bean bean) throws Exception {                    
                        List<Bean.DataBean> list=bean.getData();
                        return list;
                    }
                }).observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Consumer<List<Bean.DataBean>>() {
                    @Override
public void accept(List<Bean.DataBean> dataBeans) throws Exception {
                        mRecyclerView.setAdapter(new MyAdapter(dataBeans,MainActivity.this));                    
                    }
                });


    }
}

public interface FilmService {

    @GET("apiv3/post/getPostInCate?cateid=0&")
    Observable<Bean> getBean(@Query("p") int p);
}

public class MyApp extends Application {
    public String BaseUrl="http://app.vmoiver.com/";
    private static Retrofit mRetrofit;

    public static Retrofit getmRetrofit() {
        return mRetrofit;
    }

    @Override
public void onCreate() {
        super.onCreate();
        mRetrofit=new Retrofit.Builder()    
                .baseUrl ( BaseUrl )
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .addConverterFactory(GsonConverterFactory.create())
                .build();

Fresco.initialize(this);

}}

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {

    private Context context;
    private List<Bean.DataBean> mdatas;

    public MyAdapter(List<Bean.DataBean> mdatas, Context context) {
        this.context = context;
        this.mdatas = mdatas;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View inflate= LayoutInflater.from(context).inflate(R.layout.item,parent,false);
        return new ViewHolder(inflate);
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        holder.item_img.setImageURI(mdatas.get(position).getImage());
        holder.item_textview.setText(mdatas.get(position).getTitle());
    }

    @Override
    public int getItemCount() {
        return mdatas.size();
    }

    static class ViewHolder extends RecyclerView.ViewHolder{

        private SimpleDraweeView item_img;
        private TextView item_textview;

        public ViewHolder(View itemView) {
            super(itemView);

            item_img=itemView.findViewById(R.id.item_img);
            item_textview=itemView.findViewById(R.id.item_textview);
        }
    }
}

<com.facebook.drawee.view.SimpleDraweeView
    android:id="@+id/item_img"
    android:src="@mipmap/ic_launcher"
    android:layout_width="100dp"
    android:layout_height="100dp" />