如何制作 2 个嵌套的 Volley JsonRequests？

如何解决如何制作 2 个嵌套的 Volley JsonRequests？

我正在 Android Studio 上构建一个带有评论的应用程序，评论模型如下所示：

public class Comment {
 private int commentID;
 private String body;
 private String commentTime;
 private  int postID;
 private int userID;


 public Comment() {
     super();
 }

 public Comment(int commentID,String body,String commentTime,int postID,int userID) {
     this.commentID = commentID;
     this.body = body;
     this.commentTime = commentTime;
     this.postID = postID;
     this.userID = userID;
 } 

 public int getCommentID() {
     return commentID;
 }

 public void setCommentID(int commentID) {
     this.commentID = commentID;
 } 

 public String getBody() {
     return body;
 }

 public void setBody(String body) {
     this.body = body;
 }

 public String getCommentTime() {
     return commentTime;
 } 

 public void setCommentTime(String commentTime) {
     this.commentTime = commentTime;
 }

 public int getPostID() {
     return postID;
 } 

 public void setPostID(int postID) {
     this.postID = postID;
 }

 public int getUserID() {
     return userID;
 }

 public void setUserID(int userID) {
     this.userID = userID;
 }

 @Override
 public String toString() {
     return "Comment{" +
             "commentID=" + commentID +
             ",body='" + body + '\'' +
             ",commentTime='" + commentTime + '\'' +
             ",postID=" + postID +
             ",userID=" + userID +
             '}';
 } 
} 

我正在通过函数extractComments() 检索评论，并使用extractUsersforComments() 从我构建的Web 服务中获取用户对象，问题是extractUsersforComments() 仅在extractComments() 请求完成后才起作用。如何使用 volley 在彼此内部使用 2 个 API？ 这些是函数：

    public User extractUsersForComments(int userID){
    RequestQueue queue2= Volley.newRequestQueue(getApplicationContext());

    String JSON_URL2="http://192.168.1.109:8080/api/" + userID;

    JsonObjectRequest jsonObjReq = new JsonObjectRequest(Request.Method.GET,JSON_URL2,null,new Response.Listener<JSONObject>() {

        @Override
        public void onResponse(JSONObject response) {

            try {




                user2.setUserID(response.getInt("userID"));
                user2.setEmail(response.getString("email").toString());
                user2.setUserType(response.getString("userType").toString());
                user2.setFirstName(response.getString("firstName").toString());
                user2.setLastName(response.getString("lastName").toString());
                user2.setUserPassword(response.getString("userPassword").toString());
                user2.setUserImage((response.getString("userImage").toString()));
                 Log.d("user2",user2.toString());

                //  userName.setText(user.getFirstName()+" "+user.getLastName());
                // Log.d("userName",user.getFirstName());

            } catch (JSONException e) {
                e.printstacktrace();
            }
        }


    },new Response.ErrorListener(){
        @Override
        public void onErrorResponse(VolleyError error) {
            Log.d("tag","onErrorResponse: " + error.getMessage());
        }
    });
    queue2.add(jsonObjReq);

    return user2;


    }