Question

我正在尝试使用以下代码实现搜索功能：

private void firebaseSearch(String searchText) {

Query firebaseSearchQuery = mRef.orderByChild("title").startAt(searchText).endAt(searchText + "\uf8ff");}

但是，Java编译器抛出以下错误：

error: incompatible types: com.google.firebase.database.Query cannot be converted to com.firebase.client.Query

firebaseSearch方法上方的代码：

import android.support.annotation.NonNull;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.ViewGroup;

import com.firebase.client.Firebase;
import com.firebase.client.Query;
import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;

public class ArticleScreen extends AppCompatActivity {

RecyclerView mRecyclerView;
FirebaseDatabase mFirebaseDatabase;
DatabaseReference mRef;

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

    mRecyclerView = (RecyclerView) findViewById(R.id.recyclerView);
    mRecyclerView.setHasFixedSize(true);

    mRecyclerView.setLayoutManager( new LinearLayoutManager(this));

    mFirebaseDatabase = FirebaseDatabase.getInstance();
    mRef = mFirebaseDatabase.getReference("data");

}

Answer 1

尝试以下

com.google.firebase.database.Query firebaseSearchQuery = mRef.orderByChild("title").startAt(searchText).endAt(searchText + "\uf8ff");}

查看返回类型orderByChild

Answer 2

您似乎在应用程序的build.gradle中包含了两个版本的Firebase SDK，一个是2.x，另一个是最新的。您将需要删除2.x版本，并进行以下更改：

import com.firebase.client.Firebase;
import com.firebase.client.Query;

到

import com.google.firebase.database.Firebase;
import com.google.firebase.database.Query;

Firebase查询错误-类型不兼容

2 个答案: