How to notify RecyclerView that data has changed?

Question

Java

Good afternoon! When the focus is lost, the value is taken from the TextEdit and written to the database. How to notify RecyclerView that the data has changed and the view needs to be updated from the ViewHolder?

public class OrderViewHolder extends RecyclerView.ViewHolder {

    public OrderCardBinding orderCardBinding;
    DbHelper dbHelper;
    public OrderViewHolder(View itemView) {
        super(itemView);
        dbHelper = new DbHelper(itemView.getContext());
        orderCardBinding = DataBindingUtil.bind(itemView);

        orderCardBinding.orderTitleEt.setOnFocusChangeListener((view, hasFocus) -> {
            if (!hasFocus) {
                  dbHelper.renameTitleOrder(dbHelper.getAllOrders()
                        .get(getAdapterPosition()).id, orderCardBinding.orderTitleEt.getText().toString());
                        //вот здесь нужно уведомить RecyclerView что данные изменились и нужно обновить адаптер

            }
        });
    }
}

Answer 1

I didn’t quite understand what you want
, if you want to take data from the database, then you can use ContentProvider (yes cursorprovider does not work with RecyclerView but there is https://gist.github.com/skyfishjy/443b7448f59be978bc59 )
you can use rxjava
you can EventBus
you can just forward the interface