java无法使用firestore回收器适配器从firestore获取数据获取空的回收器视图
我无法从firestore获取数据,我没有收到任何错误,也没有应用程序崩溃
依赖项使用:
执行官网。firebase ui:firebase ui firestore:7.1.1'
执行官网。谷歌。firebase:firebase firestore:22.0.0'
我的firestore规则:
service cloud.firestore {
match /databases/{database}/documents {
match /{document=**} {
allow read, write;
}
}
}
我的适配器:
import 安卓.util.Log;
import 安卓.view.LayoutInflater;
import 安卓.view.View;
import 安卓.view.ViewGroup;
import 安卓.widget.TextView;
import 安卓x.annotation.NonNull;
import 安卓x.recyclerview.widget.RecyclerView;
import com.firebase.ui.firestore.FirestoreRecyclerAdapter;
import com.firebase.ui.firestore.FirestoreRecyclerOptions;
public class Adapter extends FirestoreRecyclerAdapter<Information, Adapter.nameHolder> {
public Adapter(@NonNull FirestoreRecyclerOptions<Information> options) {
super(options);
}
@Override
protected void onBindViewHolder(@NonNull nameHolder holder, int position, @NonNull Information model) {
holder.myName.setText(model.getMyName());
Log.e("hi",model.getMyName());
}
@NonNull
@Override
public nameHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.name_card,parent,false);
return new nameHolder(v);
}
class nameHolder extends RecyclerView.ViewHolder{
TextView myName;
public nameHolder(@NonNull View itemView) {
super(itemView);
myName = itemView.findViewById(R.id.myName);
}
}
}
主要类别:
import 安卓x.appcompat.app.AppCompatActivity;
import 安卓x.recyclerview.widget.LinearLayoutManager;
import 安卓x.recyclerview.widget.RecyclerView;
import 安卓.os.Bundle;
import 安卓.util.Log;
import 安卓.widget.TextView;
import com.firebase.ui.firestore.FirestoreRecyclerOptions;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.firestore.CollectionReference;
import com.google.firebase.firestore.FirebaseFirestore;
import com.google.firebase.firestore.Query;
public class allNames extends AppCompatActivity {
private TextView nameType;
private RecyclerView myRecyclerView;
private FirebaseAuth fAuth;
private String userId;
private FirebaseFirestore firebaseFirestore = FirebaseFirestore.getInstance();
private CollectionReference collectionReference = firebaseFirestore.collection("Hi");
private Adapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_all_names);
nameType = findViewById(R.id.nameType);
myRecyclerView = findViewById(R.id.myRecyclerView);
/*fAuth = FirebaseAuth.getInstance();
userId = fAuth.getCurrentUser().getUid();*/
setUpRecyclerView();
}
private void setUpRecyclerView(){
Query query = collectionReference.orderBy("priority",Query.Direction.DESCENDING);
FirestoreRecyclerOptions<Information> options = new FirestoreRecyclerOptions.Builder<Information>()
.setQuery(query,Information.class).build();
adapter = new Adapter(options);
myRecyclerView.setHasFixedSize(true);
myRecyclerView.setLayoutManager(new LinearLayoutManager(this));
myRecyclerView.setAdapter(adapter);
}
@Override
protected void onStart() {
super.onStart();
adapter.startListening();
}
@Override
protected void onStop() {
super.onStop();
adapter.stopListening();
}
}
我只想从firestore取名字
我们能做些什么
共 (0) 个答案