Load Firebase Data

public class DisplayAllData extends RecyclerView.Adapter<DisplayAllData.ItemViewHolder>{
    private  List<User> mUserLsit=new ArrayList<>();
    private Context mContext;

    @Override
    public ItemViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.row_layout,parent,false);
        return new ItemViewHolder(view);
    }

    public DisplayAllData(Context mContext,List<User> mUserLsit) {
        this.mContext=mContext;
        this.mUserLsit = mUserLsit;
    }

    @Override
    public void onBindViewHolder(ItemViewHolder holder, int position) {
        User user=mUserLsit.get(position);
        holder.mTvName.setText(user.name);
        holder.mTvEmail.setText(user.email);
        holder.mTvPwd.setText(user.pwd);
    }

    @Override
    public int getItemCount() {
        return mUserLsit.size();
    }

    public class ItemViewHolder extends RecyclerView.ViewHolder {
        TextView mTvName,mTvEmail,mTvPwd;
        public ItemViewHolder(View itemView) {
            super(itemView);
            mTvEmail=itemView.findViewById(R.id.rlTvEmail);
            mTvName=itemView.findViewById(R.id.rlTvName);
            mTvPwd=itemView.findViewById(R.id.rlTvPwd);

        }
    }
}




















public class DisplayActivity extends AppCompatActivity {
    private RecyclerView mRvData;
    private DisplayAllData allDataAdapter;
    private DatabaseReference mDatabase;
    private TextView mTvEmpty;
    private FirebaseDatabase mFirebaseInstance;
    private List<User> mUserList = new ArrayList<>();

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.display_data);
        initView();
    }

    private void initView() {
        mFirebaseInstance = FirebaseDatabase.getInstance();
        mDatabase = mFirebaseInstance.getReference("usersDb/UserTable");
        mRvData = findViewById(R.id.rvData);
        mTvEmpty = findViewById(R.id.dlTvEmpty);
        mRvData.setLayoutManager(new LinearLayoutManager(this));
        mDatabase.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                mUserList.clear();
                for (DataSnapshot dataSnapshot1 : dataSnapshot.getChildren()) {
                    User user = dataSnapshot1.getValue(User.class);
                    mUserList.add(user);
                }
                allDataAdapter = new DisplayAllData(DisplayActivity.this, mUserList);
                mRvData.setAdapter(allDataAdapter);
                allDataAdapter.notifyDataSetChanged();
                if (mUserList.isEmpty())
                    mTvEmpty.setVisibility(View.VISIBLE);
                else
                    mTvEmpty.setVisibility(View.GONE);
            }


            @Override
            public void onCancelled(DatabaseError databaseError) {

            }
        });
    }
}