相关疑难解决方法(0)

然而现在我从FireBase一次获取所有数据.我想做什么,一次获取LIMITS中的数据,如15条记录.就像在第一次用户从中获取15条记录Firebase时,当用户在屏幕的底部/顶部加载更多数据时,应该有15条记录来自Firebase并添加到列表的底部/ TOP.

我已经实现了逻辑,以便从数据库的顶部或底部获取15条记录,Firebase如下所示: -

public class ChatActivity extends AppCompatActivity implements FirebaseAuth.AuthStateListener {

    private FirebaseAuth mAuth;
    private DatabaseReference mChatRef;

    private Query postQuery;
    private String newestPostId;
    private String oldestPostId;
    private int startAt = 0;
    private SwipeRefreshLayout swipeRefreshLayout;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_chat);

        mAuth = FirebaseAuth.getInstance();
        mAuth.addAuthStateListener(this);

        mChatRef = FirebaseDatabase.getInstance().getReference();
        mChatRef = mChatRef.child("chats");

         /////GETTING THE VIEW ID OF SWIPE LAYOUT
        swipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipeRefreshLayout);

    /////GETTING FIRST 10 RECORDS …