在Python 3中，我收到错误TypeError: a bytes-like object is required, not 'bytearray'
我有一个bytearray，看起来像这样：
>>> print(my_ba)
bytearray(b'}\x0e\x15/ow4|-')
如果我在控制台中输入它，它可以工作：
>>> print(base58.b58encode(b'}\x0e\x15/ow4|-'))
2bKmhuGiGP7t8
但这会产生错误，我无法找到如何获得b＆＃39;＆＃39; bytearray中的字符串：
>>> print(base58.b58encode(my_ba)
TypeError: a bytes-like object is required, not 'bytearray'
我确定这很明显，但如何将bytearray转换为带有b前缀的字符串？
答案 0 :(得分：10)
正如Coldspeed在评论中所说，只需将一个bytearray传递给bytes(my_ba)来电：
package org.terna.notes_aap;
/**
* Created by Sohail on 8/23/2017.
*/
import android.content.Context;
import android.content.Intent;
import android.support.v7.app.AlertDialog;
import android.support.v7.widget.CardView;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.ViewGroup;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.chauthai.swipereveallayout.SwipeRevealLayout;
import com.chauthai.swipereveallayout.ViewBinderHelper;
import java.util.ArrayList;
import java.util.List;
import static android.R.attr.name;
public class NotesAdapter extends RecyclerView.Adapter<NotesAdapter.MyViewHolder> {
private List<Note> noteList;
private Context context;
private ItemClickListener clickListener;
private LayoutInflater mInflater;
int i;
private final ViewBinderHelper viewBinderHelper = new ViewBinderHelper();
public void setClickListener(ItemClickListener itemClickListener) {
this.clickListener = itemClickListener;
}
public NotesAdapter(List<Note> noteList, Context context) {
this.noteList = noteList;
this.context = context;
mInflater = LayoutInflater.from(context);
viewBinderHelper.setOpenOnlyOne(true);
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.note_list_row, parent, false);
return new MyViewHolder(itemView);
}
@Override
public void onBindViewHolder(final MyViewHolder holder, int position) {
Note note = noteList.get(position);
holder.tid.setText(""+note.getId());
holder.title.setText(note.getTitle());
holder.description.setText(note.getDescription());
holder.date.setText(note.getDate());
holder.month.setText(note.getMonth());
holder.year.setText(note.getYear());
if (noteList != null && 0 <= position && position < noteList.size()) {
final String data = noteList.get(position).toString();
holder.bind(data);
}
}
@Override
public int getItemCount() {
if (noteList == null)
return 0;
return noteList.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
private SwipeRevealLayout swipeLayout;
private View deleteLayout;
public TextView tid, title, description,month, date, year;
// this relativelayout is my row in recyclerview were i want the on click event.
public RelativeLayout relativeLayout;
Button button1;
PersonDB db1=new PersonDB(context,"persondb2.db",null,1);
ArrayList<PersonModel> persons = db1.getAllPersons();
String id1;
// i have created all objects here.
public MyViewHolder(View view) {
super(view);
swipeLayout = (SwipeRevealLayout) itemView.findViewById(R.id.swipe_layout);
deleteLayout = itemView.findViewById(R.id.delete_layout);
tid = (TextView) view.findViewById(R.id.id);
title = (TextView) view.findViewById(R.id.title);
description = (TextView) view.findViewById(R.id.description);
month = (TextView) view.findViewById(R.id.month);
date = (TextView) view.findViewById(R.id.date);
year = (TextView) view.findViewById(R.id.year);
relativeLayout = (RelativeLayout) view.findViewById(R.id.list_row);
button1 =(Button)view.findViewById(R.id.button1);
relativeLayout.setOnClickListener(this);
}
// this is for deletion of items in recycler view, its working fine.
public void bind(String data) {
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
i = Integer.parseInt(tid.getText().toString());
db1.deletePerson(i);
Toast.makeText(context, "DELETED id = "+tid.getText(), Toast.LENGTH_SHORT).show();
noteList.remove(getAdapterPosition());
notifyItemRemoved(getAdapterPosition());
}
});
}
// I am passing the 'i' parameter because i want the id of the item which is clicked, so that i can perform update, delete note operation.
// Is there any Other way to do it
@Override
public void onClick(View view) {
i = Integer.parseInt(tid.getText().toString());
if (clickListener != null) clickListener.onClick(view, getAdapterPosition(),i); // call the onClick in the OnItemClickListener
}
}
public int getdata(){
int s = i;
return s;
}
}