请生成上一个问题的代码

好的，这里给出一个简单的实现，仅供参考：

1. res/layout/activity_register.xml (注册页面布局文件)

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <EditText
        android:id="@+id/edit_account"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="账号" />

    <EditText
        android:id="@+id/edit_password"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="密码"
        android:inputType="textPassword" />

    <Button
        android:id="@+id/btn_register"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="注册" />

</LinearLayout>

2. res/layout/activity_login.xml (登录页面布局文件)

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <EditText
        android:id="@+id/edit_account"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="账号" />

    <EditText
        android:id="@+id/edit_password"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="密码"
        android:inputType="textPassword" />

    <CheckBox
        android:id="@+id/check_remember"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="记住密码" />

    <Button
        android:id="@+id/btn_login"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="登录" />

</LinearLayout>

3. RegisterActivity.java (注册页面的Activity)

public class RegisterActivity extends AppCompatActivity {
    private EditText mEditAccount;
    private EditText mEditPassword;
    private Button mBtnRegister;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);

        mEditAccount = findViewById(R.id.edit_account);
        mEditPassword = findViewById(R.id.edit_password);
        mBtnRegister = findViewById(R.id.btn_register);
        mBtnRegister.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String account = mEditAccount.getText().toString().trim();
                String password = mEditPassword.getText().toString().trim();
                SharedPreferences sp = getSharedPreferences("user", MODE_PRIVATE);
                if (sp.contains(account)) {
                    Toast.makeText(RegisterActivity.this, "账号已存在", Toast.LENGTH_SHORT).show();
                } else {
                    SharedPreferences.Editor editor = sp.edit();
                    editor.putString(account, password);
                    editor.apply();
                    Toast.makeText(RegisterActivity.this, "注册成功", Toast.LENGTH_SHORT).show();
                    finish();
                }
            }
        });
    }
}

4. LoginActivity.java (登录页面的Activity)

public class LoginActivity extends AppCompatActivity {
    private EditText mEditAccount;
    private EditText mEditPassword;
    private CheckBox mCheckRemember;
    private Button mBtnLogin;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);

        mEditAccount = findViewById(R.id.edit_account);
        mEditPassword = findViewById(R.id.edit_password);
        mCheckRemember = findViewById(R.id.check_remember);
        mBtnLogin = findViewById(R.id.btn_login);
        mBtnLogin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String account = mEditAccount.getText().toString().trim();
                String password = mEditPassword.getText().toString().trim();
                SharedPreferences sp = getSharedPreferences("user", MODE_PRIVATE);
                if (sp.contains(account) && sp.getString(account, "").equals(password)) {
                    Toast.makeText(LoginActivity.this, "登录成功", Toast.LENGTH_SHORT).show();
                    if (mCheckRemember.isChecked()) {
                        SharedPreferences.Editor editor = sp.edit();
                        editor.putString("last_account", account);
                        editor.putString("last_password", password);
                        editor.apply();
                    }
                    finish();
                } else {
                    Toast.makeText(LoginActivity.this, "登录失败", Toast.LENGTH_SHORT).show();
                }
            }
        });

        SharedPreferences sp = getSharedPreferences("user", MODE_PRIVATE);
        String lastAccount = sp.getString("last_account", "");
        String lastPassword = sp.getString("last_password", "");
        if (!TextUtils.isEmpty(lastAccount) && !TextUtils.isEmpty(lastPassword)) {
            mEditAccount.setText(lastAccount);
            mEditPassword.setText(lastPassword);
            mCheckRemember.setChecked(true);
        }
    }
}

这个实现方式是基于SharedPreferences来保存注册的账号和密码信息，并在登录页面中进行匹配，实现注册登录功能。如果需要更高级的功能，例如加密存储用户密码等，可以参考更多的Android开发教程。