数据库应该如何用于firebase中的一对一聊天应用程序

Question

这是我目前的数据库结构，它不起作用，我已经知道它不是实现我想要的正确方法......


"Messages" : 
"+918105571584" : 
  "+919945342730" : 
    "-L5AFX_RMebwd3EiuWUm" : 
      "message" : "Hi",
      "seen" : false,
      "time" : 1518459824840,
      "type" : "text"
    ,
    "-L5AFah6msuwW2fCXnMg" : 
      "message" : "Hey",
      "seen" : false,
      "time" : 1518459841703,
      "type" : "text"
    ,
    "-L5AFbmLTctRBxXjAkDW" : 
      "message" : "Message",
      "seen" : false,
      "time" : 1518459846120,
      "type" : "text"
    
  
,
"+919945342730" : 
  "+918105571584" : 
    "-L5AFX_RMebwd3EiuWUm" : 
      "message" : "Hi",
      "seen" : false,
      "time" : 1518459824840,
      "type" : "text"
    ,
    "-L5AFah6msuwW2fCXnMg" : 
      "message" : "Hey",
      "seen" : false,
      "time" : 1518459841703,
      "type" : "text"
    ,
    "-L5AFbmLTctRBxXjAkDW" : 
      "message" : "Message",
      "seen" : false,
      "time" : 1518459846120,
      "type" : "text"
    
  

,
"Users" : 
"+918105571584" : 
  "Email" : "",
  "Name" : "Akash",
  "Quote" : "",
  "Status" : ""
,
"+919945342730" : 
  "Email" : "",
  "Name" : "Sav",
  "Quote" : "",
  "Status" : ""

首先是一个孩子的消息和里面的发件人ID（电话号码）接收者ID（电话号码）然后唯一的ID包含消息...所以如果这不是正确的方式来实现一对一的聊天应用程序可以有人打电话给我如何我数据库结构应该是实现的

聊天活动

public class Chat extends AppCompatActivity 


Button addImage;
Button sendButton;
EditText messageArea;
ScrollView scrollView;
TextView name;
FirebaseAuth mAuth;
String MessageSenderId;
String MessageRecieverId;
DatabaseReference rootRef;
RecyclerView userMessageList;
private final List<Messages> messagesList = new ArrayList<>();
private LinearLayoutManager linearLayoutManager;
private MessageAdapter messageAdapter;
FirebaseUser user;
@Override
protected void onCreate(Bundle savedInstanceState) 
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_chat);

    sendButton = (Button) findViewById(R.id.send_message);
    messageArea = (EditText) findViewById(R.id.input_message);
    scrollView = (ScrollView) findViewById(R.id.scrollView);
    addImage = (Button)findViewById(R.id.add_image);
    name = (TextView) findViewById(R.id.name);

    name.setText((getIntent().getStringExtra("name")));

    messageAdapter = new MessageAdapter(messagesList);
    userMessageList = (RecyclerView)findViewById(R.id.messageList);
    linearLayoutManager = new LinearLayoutManager(this);

    userMessageList.setHasFixedSize(true);
    userMessageList.setLayoutManager(linearLayoutManager);
    userMessageList.setAdapter(messageAdapter);


    rootRef = FirebaseDatabase.getInstance().getReference();
    user  = FirebaseAuth.getInstance().getCurrentUser();
    mAuth = FirebaseAuth.getInstance();

    MessageSenderId = mAuth.getCurrentUser().getPhoneNumber();
    MessageRecieverId = getIntent().getStringExtra("visit_user_id");




    fetchMessages();


    sendButton.setOnClickListener(new View.OnClickListener() 
        @Override
        public void onClick(View v) 
            sendMessage();
        
    );


private void fetchMessages() 
    rootRef.child("Messages").child(MessageSenderId).child(MessageRecieverId)
            .addChildEventListener(new ChildEventListener() 
                @Override
                public void onChildAdded(DataSnapshot dataSnapshot, String s) 

                    Messages messages = dataSnapshot.getValue(Messages.class);
                    messagesList.add(messages);
                    messageAdapter.notifyDataSetChanged();
                

                @Override
                public void onChildChanged(DataSnapshot dataSnapshot, String s) 



                

                @Override
                public void onChildRemoved(DataSnapshot dataSnapshot) 

                

                @Override
                public void onChildMoved(DataSnapshot dataSnapshot, String s) 

                

                @Override
                public void onCancelled(DatabaseError databaseError) 
                    throw databaseError.toException();
                
            );



private void sendMessage() 
 String messageText = messageArea.getText().toString();
 if (TextUtils.isEmpty(messageText))
     Toast.makeText(getApplicationContext(),"Can't Send Blank Message",Toast.LENGTH_SHORT).show();
    
    else 
     String message_sender_ref = "Messages/" + MessageSenderId + "/" + MessageRecieverId;
     String message_reciver_ref = "Messages/" + MessageRecieverId + "/" + MessageSenderId;

     DatabaseReference user_message_key = rootRef.child("Messages").child(MessageSenderId)
                                                 .child(MessageRecieverId).push();
     String message_push_id = user_message_key.getKey();

     Map messageTextBody = new HashMap<>();
     messageTextBody.put("number",MessageSenderId);
     messageTextBody.put("message",messageText);
     messageTextBody.put("seen",false);
     messageTextBody.put("type","text");
     messageTextBody.put("time", ServerValue.TIMESTAMP);



     Map messageBodyDetails = new HashMap();

     messageBodyDetails.put(message_sender_ref + "/" + message_push_id,messageTextBody);
     messageBodyDetails.put(message_reciver_ref + "/" + message_push_id,messageTextBody);

     rootRef.updateChildren(messageBodyDetails, new DatabaseReference.CompletionListener() 
         @Override
         public void onComplete(DatabaseError databaseError, DatabaseReference databaseReference) 
             if (databaseError != null)
                 Log.d("Chat_Log", databaseError.getMessage().toString());
             
             messageArea.setText("");
         
     );