要在RecyclerView中显示数据，您可以使用Retrofit来进行网络请求，并使用适配器将数据绑定到RecyclerView。以下是一个示例代码：

首先，在build.gradle文件中添加Retrofit和RecyclerView的依赖项：

implementation 'com.squareup.retrofit2:retrofit:2.9.0'
implementation 'com.squareup.retrofit2:converter-gson:2.9.0'
implementation 'androidx.recyclerview:recyclerview:1.2.0'

接下来，创建一个数据模型类，例如User.java：

public class User {
    private int id;
    private String name;
    private String email;

    // Getter and setter methods
}

然后，创建一个接口来定义网络请求，例如ApiService.java：

public interface ApiService {
    @GET("users")
    Call> getUsers();
}

接下来，在您的Activity或Fragment中，初始化Retrofit并发起网络请求：

// 创建Retrofit实例
Retrofit retrofit = new Retrofit.Builder()
        .baseUrl("https://api.example.com/")
        .addConverterFactory(GsonConverterFactory.create())
        .build();

// 创建ApiService实例
ApiService apiService = retrofit.create(ApiService.class);

// 发起网络请求
Call> call = apiService.getUsers();
call.enqueue(new Callback>() {
    @Override
    public void onResponse(Call> call, Response> response) {
        if (response.isSuccessful()) {
            List userList = response.body();

            // 将数据绑定到RecyclerView
            RecyclerView recyclerView = findViewById(R.id.recyclerView);
            RecyclerViewAdapter adapter = new RecyclerViewAdapter(userList);
            recyclerView.setAdapter(adapter);
            recyclerView.setLayoutManager(new LinearLayoutManager(MainActivity.this));
        }
    }

    @Override
    public void onFailure(Call> call, Throwable t) {
        Toast.makeText(MainActivity.this, "网络请求失败", Toast.LENGTH_SHORT).show();
    }
});

最后，创建一个RecyclerViewAdapter类来绑定数据到RecyclerView：

public class RecyclerViewAdapter extends RecyclerView.Adapter {
    private List userList;

    public RecyclerViewAdapter(List userList) {
        this.userList = userList;
    }

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

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        User user = userList.get(position);
        holder.nameTextView.setText(user.getName());
        holder.emailTextView.setText(user.getEmail());
    }

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

    public static class ViewHolder extends RecyclerView.ViewHolder {
        public TextView nameTextView;
        public TextView emailTextView;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            nameTextView = itemView.findViewById(R.id.nameTextView);
            emailTextView = itemView.findViewById(R.id.emailTextView);
        }
    }
}

请注意，上述示例中的代码只是一个基本框架，您可能需要根据您的具体需求进行适当的修改和调整。