如果我的數據庫仍在加載,則顯示加載對話框。那就是我想讓我的chatapp起作用。我發現我的問題,通過以下FirebaseRecyclerAdapter不覆蓋onDataChanged
new FirebaseRecyclerAdapter(...) {
@Override
protected void populateViewHolder(...) {...}
@Override
protected void onDataChanged() {
}
};
在我FirebaseRecyclerAdapter
覆蓋onDataChanged()
這樣的代碼解決,但問題是我不能覆蓋onDataChanged()
我的適配器。 我該如何解決這個問題?請參閱下面的屏幕截圖。
更新: 這是我與我的問題,整個代碼(其他代碼是沒有必要發佈)。
public void btn_discussion() {
FRRA = new FirebaseRecyclerAdapter<Message, MessageViewHolder>(
Message.class,
R.layout.discussion_q_and_answer,
ActivityDiscussion.MessageViewHolder.class,
MyDatabase
) {
@Override
protected void populateViewHolder(ActivityDiscussion.MessageViewHolder viewHolder, Message model, int position) {
viewHolder.setContent(model.getContent());
viewHolder.setUsername(model.getUsername());
viewHolder.setTime(myConstructor.LongToDate(model.getTime()));
}
@Override
protected void onDataChanged() {
//Write something here
}
};
msgList.setAdapter(FRRA);
msgList.smoothScrollToPosition(FRRA.getItemCount());
}
RecyclerView.ViewHolder
public static class MessageViewHolder extends RecyclerView.ViewHolder {
View view;
public MessageViewHolder(View itemView) {
super(itemView);
this.view = itemView;
}
private void setContent(String content) {
TextView msg = view.findViewById(R.id.comment);
msg.setText(content);
}
private void setUsername(String username) {
TextView msg = view.findViewById(R.id.tv_user);
msg.setText(username);
}
private void setTime(String time) {
TextView msg = view.findViewById(R.id.tv_time);
msg.setText(time);
}
}
getter和setter Message.java
public class Message {
private String content;
private String Username;
private String time;
public Message() {}
public Message(String mcontent, String musername, String mtime) {
this.content = mcontent;
this.Username = musername;
this.time = mtime;
}
public String getContent() {
return content;
}
public void setContent(String message) {
this.content = message;
}
public String getUsername() {
return Username;
}
public void setUsername(String Username) {
this.Username = Username;
}
public String getTime() {
return time;
}
public void setTime(String time) {
this.time = time;
}
}
向我們展示你的整個代碼(適配器) –
感謝@WaleedAsim先生。請參閱我上面更新的帖子。 – basaya