SetAdapter 不能作为 FirestoreRecyclerviewAdapter 的适配器应用

Posted 2023-04-19

【中文标题】SetAdapter 不能作为 FirestoreRecyclerviewAdapter 的适配器应用

【英文标题】：SetAdapter cannot be applied as the adapter of FirestoreRecyclerviewAdapter

【发布时间】：2021-11-04 20:55:48

【问题描述】：

我正在使用 firebase 开发一个聊天应用程序，我想将用户信息匹配到 recyclerview...当我将适配器设置为 recyclerview 时，我的代码是正确的，它显示错误。 这是我的代码：

package com.abdelatif.chatapp;

import android.graphics.Color;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.recyclerview.widget.RecyclerView.ViewHolder;

import com.firebase.ui.firestore.FirestoreRecyclerAdapter;
import com.firebase.ui.firestore.FirestoreRecyclerOptions;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.firestore.FirebaseFirestore;
import com.google.firebase.firestore.Query;
import com.squareup.picasso.Picasso;


public class ChatFragment extends Fragment 

    private FirebaseFirestore firebaseFirestore;
    LinearLayoutManager linearLayoutManager;
    private FirebaseAuth firebaseAuth;

    ImageView mimageviewofuser;

    FirestoreRecyclerAdapter<FireBaseModel, NoteViewHolder> chatAdapter = null;

    RecyclerView mrecyclerview;



    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) 
        View v=inflater.inflate(R.layout.chatfragment,container,false);

        firebaseAuth=FirebaseAuth.getInstance();
        firebaseFirestore= FirebaseFirestore.getInstance();
        mrecyclerview=v.findViewById(R.id.recyclerView);


        // Query query=firebaseFirestore.collection("Users");
        Query query=firebaseFirestore.collection("Users").whereNotEqualTo("uid",firebaseAuth.getUid());
        FirestoreRecyclerOptions<FireBaseModel> allusername=new FirestoreRecyclerOptions.Builder<FireBaseModel>().setQuery(query,FireBaseModel.class).build();

        chatAdapter=new FirestoreRecyclerAdapter<FireBaseModel, NoteViewHolder>(allusername) 
            @Override
            protected void onBindViewHolder(@NonNull NoteViewHolder noteViewHolder, int i, @NonNull FireBaseModel firebasemodel) 

                noteViewHolder.particularusername.setText(firebasemodel.getName());
                String uri=firebasemodel.getImage();

                Picasso.get().load(uri).into(mimageviewofuser);
                if(firebasemodel.getStatus().equals("Online"))
                
                    noteViewHolder.statusofuser.setText(firebasemodel.getStatus());
                    noteViewHolder.statusofuser.setTextColor(Color.GREEN);
                
                else
                
                    noteViewHolder.statusofuser.setText(firebasemodel.getStatus());
                

                noteViewHolder.itemView.setOnClickListener(new View.OnClickListener() 
                    @Override
                    public void onClick(View view) 
                        Toast.makeText(getActivity(), "contactClicked", Toast.LENGTH_SHORT).show();
                    
                );



            

            @NonNull
            @Override
            public NoteViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) 

                View view=LayoutInflater.from(parent.getContext()).inflate(R.layout.chat_view_layout,parent,false);
                return new NoteViewHolder(view);
            
        ;

        mrecyclerview.setHasFixedSize(true);
        linearLayoutManager=new LinearLayoutManager(getContext());
        linearLayoutManager.setOrientation(RecyclerView.VERTICAL);
        mrecyclerview.setLayoutManager(linearLayoutManager);
        mrecyclerview.setAdapter(chatAdapter);
        chatAdapter.startListening();


        return v;

    

    public class NoteViewHolder extends android.support.v7.widget.RecyclerView.ViewHolder
    

        private TextView particularusername;
        private TextView statusofuser;

        public NoteViewHolder(@NonNull View itemView) 
            super(itemView);
            particularusername=itemView.findViewById(R.id.nameOfUser);
            statusofuser=itemView.findViewById(R.id.statusOfUser);
            mimageviewofuser=itemView.findViewById(R.id.imageViewOfUser);
        
    

---

错误在一行：mrecyclerview.setAdapter(chatAdapter);

错误是： 'androidx.recyclerview.widget.RecyclerView'中的'setAdapter(androidx.recyclerview.widget.RecyclerView.Adapter)'不能应用于'(com.firebase.ui.firestore.FirestoreRecyclerAdapter)'

---

我希望有人给我一个解决方案...我搜索了很多次但没有。

【问题讨论】：

能否请您检查following article helps you 是否为Android 和Firebase 提供的以下文档？

【参考方案1】：

确保在拨打mrecyclerview.setAdapter(chatAdapter);之前先拨打chatAdapter.startListening();

【讨论】：

是的，兄弟，它解决了我的问题..我的错是我在设置适配器后调用它...我明白....非常感谢查理回答我