loginButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String name = etUserName.getText().toString().trim();                   //读取输入内容，并通过trim()从当前 String 对象移除所有前导空白字符和尾部空白字符
                String password = etPassword.getText().toString().trim();

               if ("admin".equals(name)&&"admin".equals(password)){                     //如果用户名，密码都匹配，则跳转到MainActivity，并提示登陆成功，否则提示登陆失败
                   Intent intent = new Intent(LoginActivity.this,MainActivity.class);
                   startActivity(intent);
                   if (checkBox.isChecked()){//如果勾选了记住用户名，则将通过Editor记录
                       editor.putString("UserName",name);
                       editor.commit();
                   }else {                                                              //否则则移除已记录的登陆名
                       editor.remove("UserName");
                       editor.commit();
                   }
                   Toast.makeText(LoginActivity.this,"登陆成功",Toast.LENGTH_SHORT).show();
                 
               }else{
                   Toast.makeText(LoginActivity.this,"用户名或密码错误",Toast.LENGTH_SHORT).show();
               }
            }
        });

错误信息

java.lang.NullPointerException

            at com.redrock.qiu.sharedpreference.LoginActivity$1.onClick(LoginActivity.java:52)

就是

if (checkBox.isChecked())

这一句。

是不是因为我用的匿名内部类导致的？

所有组件都已经实例化