java - 错误 : no suitable method found for setQuery(com. google.firebase.firestore.Query,Class<注意>)

Question

我正在尝试从 FirebaseFirestore 获取数据并在卡片 View 中实现它。

这是我的代码

public class MainActivity extends AppCompatActivity { 

    private FirebaseFirestore db = FirebaseFirestore.getInstance();
    private CollectionReference notebookRef = db.collection("Notebook");

    //notebookref is my collection name in firebase. 
    private NoteAdapter adapter;

    TextView tv_id;
    TextView tv_attend;

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

        tv_id=findViewById(R.id.tv_id);
        tv_attend=findViewById(R.id.tv_attend);

        setUpRecyclerView();
    }

    private void setUpRecyclerView() {
        Query query = notebookRef.orderBy("attend", Query.Direction.DESCENDING);

        FirebaseRecyclerOptions<Note> options = new FirebaseRecyclerOptions.Builder<Note>()
                .setQuery(query, Note.class)
                .build();

        adapter = new NoteAdapter(options);

        RecyclerView recyclerView = findViewById(R.id.rv_one);
        recyclerView.setHasFixedSize(true);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        recyclerView.setAdapter(adapter);

    }

    @Override
    protected void onStart() {
        super.onStart();
        adapter.startListening();
    }

    @Override
    protected void onStop() {
        super.onStop();
        adapter.stopListening();
    }
}

我收到以下错误:

error: no suitable method found for setQuery(com.google.firebase.firestore.Query,Class<Note>)

似乎我有以下问题:FirebaseRecyclerOptions.Builder().setQuery(query, Note.class).build();

有关如何处理此问题的任何指示吗？

Answer 1

检查您导入的查询。您应该导入

import com.google.firebase.firestore.Query;

更多详情

orderBy(String field, Query.Direction direction)

创建并返回一个新查询，该查询还按指定字段排序，可以选择按降序而不是升序排序。

引用号。 https://firebase.google.com/docs/reference/android/com/google/firebase/firestore/Query

相应地确认您的依赖项

dependencies {
    // FirebaseUI for Firebase Realtime Database
    implementation 'com.firebaseui:firebase-ui-database:6.2.0'

    // FirebaseUI for Cloud Firestore
    implementation 'com.firebaseui:firebase-ui-firestore:6.2.0'

    // FirebaseUI for Firebase Auth
    implementation 'com.firebaseui:firebase-ui-auth:6.2.0'

    // FirebaseUI for Cloud Storage
    implementation 'com.firebaseui:firebase-ui-storage:6.2.0'
}

引用号。 https://github.com/firebase/FirebaseUI-Android