检查用户是否看到消息

Question

我正在尝试检查用户是否看到了发送给他们的消息。 但我的问题是，一旦我发送消息， seen的文本就会显示出来。 即使用户没有看到消息并且应用程序已关闭。 我希望它在接收者实际看到消息时出现。

private void seenMessage() {

    FirebaseUser firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
    DatabaseReference reference1 = FirebaseDatabase.getInstance().getReference("Messages").child(firebaseUser.getUid()).child(messageReceiverID);
    seenListener = reference1.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(@NonNull DataSnapshot dataSnapshot) {

            for (DataSnapshot snapshot : dataSnapshot.getChildren()) {
                String messageToID = snapshot.getKey();

                Messages messages = snapshot.getValue(Messages.class);

                if (messages.getFrom().equals(firebaseUser.getUid())) {

                    DatabaseReference dbRef  = reference1.child(messageToID);

                    Log.d("TAG1", "I'm here IF" + messageReceiverID);

                    HashMap<String, Object> hashMap1 = new HashMap<>();
                    hashMap1.put("isSeen", true);
                    dbRef.updateChildren(hashMap1);

                    sawNotifications();

                } else /*  if (messages.getTo().equals(firebaseUser.getUid())) */ {

                    //receiverSeenMessage();

                    Log.d("TAG1", "I'm here else" + messageReceiverID);
                }
            }
        }

        @Override
        public void onCancelled(@NonNull DatabaseError error) {}
    });
}

private void receiverSeenMessage() {

    FirebaseUser firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
    DatabaseReference reference2 = FirebaseDatabase.getInstance().getReference("Messages").child(messageReceiverID).child(firebaseUser.getUid());
    reference2.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(@NonNull DataSnapshot snapshot) {

            for (DataSnapshot dataSnapshot : snapshot.getChildren()) {
                String messageToID = dataSnapshot.getKey();

                //Log.d("TAG6", "I'm here TOP 3." + messageReceiverID + " " + messageSenderID);
                Messages messages = dataSnapshot.getValue(Messages.class);
                Boolean isSeenValue = dataSnapshot.child("isSeen").getValue(Boolean.class);

                if (messages.getTo().equals(messageReceiverID)) {

                    DatabaseReference dbRef  = reference2.child(messageToID);

                    //Log.d("TAG9", "I'm here: " + reference2);

                    HashMap<String, Object> hashMap1 = new HashMap<>();
                    hashMap1.put("isSeen", true);
                    dbRef.updateChildren(hashMap1);

                    sawNotifications();
                } else {

                    //Log.d("TAG9", "I'm here ELSE: " + firebaseUser.getUid() + " " + messageReceiverID);
                }
            }
        }

        @Override
        public void onCancelled(@NonNull DatabaseError error) {

        }
    });

    //Log.d("TAG029", "receiverSeenMessage: " + messageSenderID + " " + messageReceiverID);
}

private void showMessages() {

    FirebaseUser firebaseUser = FirebaseAuth.getInstance().getCurrentUser();

    DatabaseReference userMessageKeyRef = RootRef.child("Messages").child(messageSenderID).child(messageReceiverID);
    userMessageKeyRef.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(@NonNull DataSnapshot snapshot) {
            for (DataSnapshot dataSnapshot : snapshot.getChildren()) {
                //for (DataSnapshot parentSnapshot : dataSnap.getChildren()) {

                if (dataSnapshot != null) {

                    Messages messages = new Messages();
                    String strMessage = dataSnapshot.child("message").getValue().toString();
                    String strFrom = dataSnapshot.child("from").getValue().toString();
                    String strTo = dataSnapshot.child("to").getValue().toString();
                    String strType = dataSnapshot.child("type").getValue().toString();
                    String strDate = dataSnapshot.child("date_time").getValue().toString();
                    Boolean isSeenValue = dataSnapshot.child("isSeen").getValue(Boolean.class);

                    messages.setMessage(strMessage);
                    messages.setFrom(strFrom);
                    messages.setType(strType);
                    messages.setMessageDate(strDate);
                    messagesList.add(messages);

                    if (strFrom.equals(firebaseUser.getUid()) && /*strFrom.equals(messageSenderID) &&*/ isSeenValue == true) {

                        txt_seen.setVisibility(View.VISIBLE);
                        //Log.d("TAG80", "In here else: " + isSeenValue);

                    } else {

                        txt_seen.setVisibility(View.GONE);
                        Log.d("TAG80", "In here else: " + messageSenderID + " " + messageReceiverID);
                    }

                } else {

                }
                //}
            }
            messageAdapter = new MessageAdapter(ChatActivity.this,messagesList);
            userMessagesList.setAdapter(messageAdapter);

            seenMessage();
            receiverSeenMessage();
        }

        @Override
        public void onCancelled(@NonNull DatabaseError error) {
        }
    });

    FirebaseUser currentUser = FirebaseAuth.getInstance().getCurrentUser();
    DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference();

    DatabaseReference messageDate = databaseReference.child("Messages").child(currentUser.getUid());
    messageDate.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(@NonNull DataSnapshot snapshot) {

            for (DataSnapshot parentSnapshot : snapshot.getChildren()) {
                for (DataSnapshot messageSnapshot : parentSnapshot.getChildren()) {

                    String date_sent = messageSnapshot.child("date_time").getValue(String.class);


                }
            }
        }

        @Override
        public void onCancelled(@NonNull DatabaseError error) {

        }
    });
}

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