将从活动1中的EditText获取的信息发送到活动2，并保存到活动2中的回收视图中

Intent intent = new Intent(Activity1.this, Activity2.class);
String message = editText.getText().toString();
intent.putExtra("message", message);
startActivity(intent);

Intent intent = getIntent();
String message = intent.getStringExtra("message");

<androidx.recyclerview.widget.RecyclerView
    android:id="@+id/recyclerView"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

RecyclerView recyclerView = findViewById(R.id.recyclerView);
RecyclerView.Adapter adapter = new MyAdapter(message); // 自定义适配器，将获取到的信息传递给适配器
recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(new LinearLayoutManager(this));

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
    private String message;

    public MyAdapter(String message) {
        this.message = message;
    }

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

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        holder.textView.setText(message);
    }

    @Override
    public int getItemCount() {
        return 1; // 只有一个项，即显示获取到的信息
    }

    public static class ViewHolder extends RecyclerView.ViewHolder {
        public TextView textView;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            textView = itemView.findViewById(R.id.textView);
        }
    }
}