Парсинг новостей

public class NewsActivity extends AppCompatActivity {
    String idnews;
    TextView main_news;
    DatabaseReference reference;
    TextView news_date;
    RecyclerView recyclerView;
    Intent intent;
    ArrayList<News> Nlist;
    NewsAdapter adapter;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_news);
 
        recyclerView = findViewById(R.id.recycler_view);
        recyclerView.setHasFixedSize(true);
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getApplicationContext());
        linearLayoutManager.setStackFromEnd(true);
        recyclerView.setLayoutManager(linearLayoutManager);
 
        intent = getIntent();
        idnews = intent.getStringExtra("idnews");
 
        reference = FirebaseDatabase.getInstance().getReference("News").child(idnews);
        reference.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
 
               // for (DataSnapshot snapshot : dataSnapshot.getChildren()){
                    News news = dataSnapshot.getValue(News.class);
                  //  news_date.setText(news.getDatenews());
                    main_news.setText(news.getNews_main()); // Указывает на ошибку тут
                    Nlist.add(news);
               // }
                adapter = new NewsAdapter(getApplicationContext(), Nlist);
                recyclerView.setAdapter(adapter);
 
            }
 
            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {
                Toast.makeText(NewsActivity.this, "Что то не так", Toast.LENGTH_SHORT).show();
            }
        });
    }
}

public class NewsAdapter extends RecyclerView.Adapter<NewsAdapter.MyViewHolder> {
 
    Context Mcontext;
    ArrayList<News> Mnews;
 
 
    public NewsAdapter(Context Mcontext, ArrayList<News> Mnews)
    {
        this.Mnews = Mnews;
        this.Mcontext = Mcontext;
    }
 
    @NonNull
    @Override
    public MyViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        return new MyViewHolder(LayoutInflater.from(Mcontext).inflate(R.layout.news_view, viewGroup, false));
    }
 
    @Override
    public void onBindViewHolder(@NonNull MyViewHolder myViewHolder, int i) {
        final News news = Mnews.get(i);
 
        myViewHolder.news_date.setText(Mnews.get(i).getDatenews());
        myViewHolder.news_header.setText(Mnews.get(i).getHeader_news());
        Picasso.get().load(Mnews.get(i).getImageURL()).into(myViewHolder.news_picture);
 
        myViewHolder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Mcontext, NewsActivity.class);
                intent.putExtra("idnews", news.getIdnews());
                Mcontext.startActivity(intent);
            }
        });
 
    }
 
    @Override
    public int getItemCount() {
        return Mnews.size();
    }
 
    class MyViewHolder extends RecyclerView.ViewHolder {
 
        TextView news_date, news_header;
        ImageView news_picture;
 
        public MyViewHolder(@NonNull View itemView) {
            super(itemView);
 
            news_date = (TextView) itemView.findViewById(R.id.news_date);
            news_header = (TextView) itemView.findViewById(R.id.news_header);
            news_picture = (ImageView) itemView.findViewById(R.id.news_picture);
        }
    }
 
}