Java 从firebase获取数据，在android中执行后，屏幕显示为空白

主要活动：

public class MainActivity extends AppCompatActivity {
   private RecyclerView mRecyclerView;
   private FirebaseAdapter mAdapter;
    private static final String TAG = "MainActivity";

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

        mRecyclerView = (RecyclerView)findViewById(R.id.recyclerview);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));

        FirebaseRecyclerOptions<DataClass> options =
                new FirebaseRecyclerOptions.Builder<DataClass>()
                        .setQuery(FirebaseDatabase.getInstance().getReference().child("Users"), DataClass.class)
                        .build();
        mAdapter = new FirebaseAdapter(options);
        mRecyclerView.setAdapter(mAdapter);
        mRecyclerView.addItemDecoration(new DividerItemDecoration(this,DividerItemDecoration.VERTICAL));
    }
    @Override
    protected void onStart() {
        super.onStart();
        mAdapter.startListening();
    }
    @Override
    protected void onStop() {
        super.onStop();
        mAdapter.stopListening();
    }
}

我没有收到任何错误，但我的屏幕仍然显示为空，实际上它显示的是空数据 如何找到它，伙计们告诉我如何解决这个问题 我知道我在代码中的某个地方犯了一个小错误，请帮助我纠正它

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谢谢您在firebase数据库或其空数据库中是否有任何消息

您可以通过firebase添加一些消息，以便您可以检查它

替换此代码

从

到

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希望这能起作用。

同时尝试检查firebase安全规则，如果默认值为false，则通过将值设置为aTrue来允许读取。它不起作用，兄弟，你能找到它吗？我的代码正确吗？@MadhanMohan请附上您的firebase子节点结构。看来你的密码是对的。兄弟，我找到了，你能告诉我这个吗

public class FirebaseAdapter extends FirebaseRecyclerAdapter<DataClass,FirebaseAdapter.MyviewHolder> {
    private static final String TAG = "FirebaseAdapter";
    public FirebaseAdapter(@NonNull FirebaseRecyclerOptions<DataClass> options) {
        super(options);
    }

    @Override
    protected void onBindViewHolder(@NonNull MyviewHolder holder, int position, @NonNull DataClass model) {
      holder.name.setText(model.getName());
      holder.age.setText(model.getAge());
        Log.d(TAG, "onBindViewHolder: Now Bind method executing");
    }

    @NonNull
    @Override
    public MyviewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
        View v=  layoutInflater.inflate(R.layout.row_represent,parent,false);
        MyviewHolder v1 = new MyviewHolder(v);
        Log.d(TAG, "onCreateViewHolder: Now on create method executing");
        return v1;
    }
    
    public static class MyviewHolder extends RecyclerView.ViewHolder{
        TextView name;
        TextView age;
        public MyviewHolder(@NonNull View itemView) {
            super(itemView);
            name = (TextView)itemView.findViewById(R.id.names);
            age = (TextView) itemView.findViewById(R.id.age);
        }
    }
}

public class DataClass {

    private  String name;
       private String age;

       public DataClass(){

       }

    public DataClass(String name, String age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public String getAge() {
        return age;
    }
}



 doubt in this parts
     public DataClass(String name, String age) {
                this.name = name;
                this.age = age;
            }
          protected void onBindViewHolder(@NonNull MyviewHolder holder, int position, @NonNull DataClass model) {
              holder.name.setText(model.getName());
              holder.age.setText(model.getAge());
                Log.d(TAG, "onBindViewHolder: Now Bind method executing");
            }
because showing me that constructor never used 

mRecyclerView.setLayoutManager(new LinearLayoutManager(this));

RecyclerView.LayoutManager layoutManager;
layoutManager = new LinearLayoutManager(this, RecyclerView.VERTICAL, false);
mRecyclerView.setLayoutManager(layoutManager);