How to transfer data to recyclerView from activity?

Just starting to dive into android, in this regard, there are some difficulties. I have a recyclerView with Note objects in the project, when I click on them, I open activity with information about this "note", specifically the title and the main text. I have the podgruzka title and text in the activity, when it is opened, but I do not understand how I can save the edited note and display the updated title and text on the "main" screen.

Code recyclerViewAdapter.java

public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.MyViewHolder> { Context mContext; List<Note> mData; Dialog mDialog; //NotesFragment notesFragment; int selected; public RecyclerViewAdapter(Context mContext, List<Note> mData) { this.mContext = mContext; this.mData = mData; //this.notesFragment = notesFragment; } @NonNull @Override public MyViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) { View v; v = LayoutInflater.from(mContext).inflate(R.layout.notes_list_item,viewGroup,false); final MyViewHolder viewHolder = new MyViewHolder(v); //---------------------Инициализация диалогового окна и его вызов по кнопке---------------------------------------------------------- mDialog = new Dialog(mContext); mDialog.setContentView(R.layout.dialog_note); Button yes_button = mDialog.findViewById(R.id.dialog_yes_btn); Button no_button = mDialog.findViewById(R.id.dialog_no_btn); viewHolder.item_note.setOnLongClickListener(new View.OnLongClickListener() { @Override public boolean onLongClick(View v) { Toast.makeText(mContext,"Test Click" + String.valueOf(viewHolder.getAdapterPosition()),Toast.LENGTH_SHORT).show(); mDialog.show(); selected = viewHolder.getAdapterPosition(); return false; } }); yes_button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { try { deleteItem(selected); mDialog.cancel(); notifyDataSetChanged(); // for (int i = 0; i < mData.size(); i++) { // mData[i] // } }catch (ArrayIndexOutOfBoundsException e){ Log.e("Error","\n ArrayIndexOutOfBoundsException length=10 index=-1 \n Опять -1, но как ???"); } } }); no_button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { mDialog.cancel(); } }); //------------------------------------------------------------------------------------------------------------------------------------- // Редактор заметки? viewHolder.item_note.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(mContext,NoteActivity.class); intent.putExtra("Title",viewHolder.tv_Name.getText().toString()); intent.putExtra("Text",viewHolder.tv_Text.getText().toString()); mContext.startActivity(intent); } }); return viewHolder; } @Override public void onBindViewHolder(@NonNull MyViewHolder holder, int position) { holder.tv_Name.setText(mData.get(position).getName()); holder.tv_Date.setText(mData.get(position).getDate()); holder.button.setBackgroundResource(mData.get(position).getFavourite()); holder.tv_Text.setText(mData.get(position).getText()); } @Override public int getItemCount() { return mData.size(); } public static class MyViewHolder extends RecyclerView.ViewHolder{ private LinearLayout item_note; private TextView tv_Name; private TextView tv_Date; private Button button; private TextView tv_Text; public MyViewHolder(@NonNull View itemView) { super(itemView); item_note = itemView.findViewById(R.id.note_item); tv_Name = itemView.findViewById(R.id.name_note); tv_Date = itemView.findViewById(R.id.date_note); button = itemView.findViewById(R.id.favorite_btn_note); tv_Text = itemView.findViewById(R.id.text_note); } } //Добавление данных public void addItem(int position, Note note){ mData.add(position, note); //Мы можем вызвать super.notifyItemInserted(position); } //Удаление данных public void deleteItem(int position){ mData.remove(position); //То же самое с методом super.notifyItemRemoved(position); notifyItemRemoved(position); notifyItemRangeChanged(position, mData.size()); // notesFragment.decreasePosition(); NotesFragment.decreasePosition(); } 

}

Code NoteActivity.java

public class NoteActivity extends AppCompatActivity {

 private String NoteTitle; private String NoteText; EditText textNote; EditText titleNote; Button saveBtn; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_note); saveBtn = findViewById(R.id.save_btn); // saveBtn.setCompoundDrawablesWithIntrinsicBounds( // AppCompatResources.getDrawable(this, R.drawable.save), null, null, null); --иконочка titleNote = findViewById(R.id.title_note); textNote = findViewById(R.id.main_text_note); Intent intent = getIntent(); NoteTitle = intent.getStringExtra("Title"); NoteText = intent.getStringExtra("Text"); titleNote.setText(NoteTitle); textNote.setText(NoteText); saveBtn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // Intent intent = new Intent(getApplicationContext(),MainActivity.class); // startActivity(intent); -- создание новой мейн активности Intent intent = new Intent(getApplicationContext(),MainActivity.class); intent.putExtra("TitleGet",titleNote.getText().toString()); finish(); } }); } 

}

I repeat - you need to somehow get the updated title and text of the note by clicking on the saveBtn button. I apologize in advance if something is not clear. One of the first times on the site. Thanks in advance for the answer!