我创建了一个函数来显示聊天消息，我遵循了教程，并且还查看了 Firebase 列表适配器的文档，但无论我做什么，我都会收到此错误：
Error:(98, 19) error: constructor FirebaseListAdapter in class
FirebaseListAdapter<T> cannot be applied to given types;
required: FirebaseListOptions<ChatMessage>
found: Chat,Class<ChatMessage>,int,DatabaseReference
reason: actual and formal argument lists differ in length
where T is a type-variable:
T extends Object declared in class FirebaseListAdapter
这是我的代码：
private void displayChatMessage() {
ListView listOfMessage = (ListView)findViewById(R.id.list_of_messages);
FirebaseRecyclerOptions<ChatMessage> options =
new FirebaseRecyclerOptions.Builder<ChatMessage>()
.setQuery(query, ChatMessage.class)
.build();
adapter = new FirebaseListAdapter<ChatMessage, Holder>(options){
@Override
protected void populateView(View v, ChatMessage model, int position) {
//Get references to the views of list_item.xml
TextView messageText, messageUser, messageTime;
messageText = (TextView) v.findViewById(R.id.message_text);
messageUser = (TextView) v.findViewById(R.id.message_user);
messageTime = (TextView) v.findViewById(R.id.message_time);
messageText.setText(model.getMessageText());
messageUser.setText(model.getMessageUser());
messageTime.setText(DateFormat.format("dd-MM-yyyy (HH:mm:ss)", model.getMessageTime()));
}
};
listOfMessage.setAdapter(adapter);
}
以下内容来自 FirebaseUI 版本 3.0+
删除这个：
adapter = new FirebaseListAdapter<ChatMessage>(this,ChatMessage.class,R.layout.list_item,FirebaseDatabase.getInstance().getReference())
你需要添加这个：
FirebaseListOptions<ChatMessage> options =
new FirebaseListOptions.Builder<ChatMessage>()
.setQuery(query, ChatMessage.class)
.setLayout(android.R.layout.simple_list_item_1)
.build();
adapter = new FirebaseListAdapter<ChatMessage>(options){
query是您对列表适配器示例进行的查询：
Query query = FirebaseDatabase.getInstance().getReference().child("chats");
更多信息请参见：
使用 FirebaseUI 填充 ListView
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