Question

一如既往地感谢您的帮助。我正在制作一个Firebase聊天应用程序，遇到了这个错误，我可以弄清楚发生了什么。

通常，如果我清除数据库并重新启动，则不会发生错误，但是每当我发送消息时，recyclerview的新消息中都会包含较旧的接收消息。我迷路和沮丧。我已经在stackoverflow上搜索了没有积极结果的解决方案。这是错误的屏幕截图。

private void loadMessages() {

    chatMessagesRef = db.getReference("ChatMessages").child(Common.currentUser.getMatric()).child(user_id);
    adapter = new FirebaseRecyclerAdapter<Message, ChatMessageViewHolder>(
            Message.class,
            R.layout.single_message_item,
            ChatMessageViewHolder.class,
            chatMessagesRef
    ) {
        @Override
        protected void populateViewHolder(final ChatMessageViewHolder viewHolder, final Message model, int position) {

            if (model.getFrom().equalsIgnoreCase(Common.currentUser.getMatric())) {

                if (model.getType().equalsIgnoreCase("text")){
                    viewHolder.yourMessage.setText(model.getMessage());
                    viewHolder.yourMessage.setVisibility(View.VISIBLE);
                    viewHolder.theAll.setBackgroundColor(Color.WHITE);
                }

            } else if (model.getFrom().equalsIgnoreCase(user_id)){

                if (model.getType().equalsIgnoreCase("text")){

                    viewHolder.messageText.setText(model.getMessage());
                    viewHolder.messageText.setVisibility(View.VISIBLE);
                    viewHolder.theAll.setBackgroundColor(Color.YELLOW);

                }

            }


        }
    };

    messagesRecycler.setAdapter(adapter);
    adapter.notifyDataSetChanged();
    messagesRecycler.scrollToPosition(adapter.getItemCount() - 1);
    adapter.cleanup();


}

private void sendTheMessage() {

    String message = chatBox.getText().toString();

    if (message.isEmpty()){
    } else {
        long date = System.currentTimeMillis();

        messageRef = db.getReference("ChatMessages").child(Common.currentUser.getMatric()).child(user_id).push();
        final String chatMessageId = messageRef.getKey();


        final Message newMessage = new Message(message, "text", date, false, Common.currentUser.getMatric());
        messageRef2 = db.getReference("ChatMessages").child(Common.currentUser.getMatric()).child(user_id);
        messageRef2.child(chatMessageId).setValue(newMessage).addOnSuccessListener(new OnSuccessListener<Void>() {
            @Override
            public void onSuccess(Void aVoid) {
                messageRef3 = db.getReference("ChatMessages").child(user_id).child(Common.currentUser.getMatric());
                messageRef3.child(chatMessageId).setValue(newMessage);

                sendNotification();
                chatBox.setText("");

            }
        });


    }

}

公共类消息{

private String message, type;
private long time;
private boolean seen;
private String from;

public Message() {
}

public Message(String message, String type, long time, boolean seen, String from) {
    this.message = message;
    this.type = type;
    this.time = time;
    this.seen = seen;
    this.from = from;
}

public String getMessage() {
    return message;
}

public void setMessage(String message) {
    this.message = message;
}

public String getType() {
    return type;
}

public void setType(String type) {
    this.type = type;
}

public long getTime() {
    return time;
}

public void setTime(long time) {
    this.time = time;
}

public boolean isSeen() {
    return seen;
}

public void setSeen(boolean seen) {
    this.seen = seen;
}

public String getFrom() {
    return from;
}

public void setFrom(String from) {
    this.from = from;
}

} This is the database structure

回收者视图在新内容上添加先前的内容

0 个答案: