android一共两个页面第一个页面包括文字登录页面两个输入框用户名和密码一个按钮：登录所有元素居中对齐排列点击登录按钮跳转另一个页面显示接收到的数据用户名和密码接受数据的方法用intent和bundle方法请写出Java和xml文件代码

Java代码：

MainActivity.java

public class MainActivity extends AppCompatActivity {

    private EditText etUsername, etPassword;
    private Button btnLogin;

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

        etUsername = findViewById(R.id.et_username);
        etPassword = findViewById(R.id.et_password);
        btnLogin = findViewById(R.id.btn_login);

        btnLogin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String username = etUsername.getText().toString();
                String password = etPassword.getText().toString();

                Intent intent = new Intent(MainActivity.this, SecondActivity.class);
                Bundle bundle = new Bundle();
                bundle.putString("username", username);
                bundle.putString("password", password);
                intent.putExtras(bundle);
                startActivity(intent);
            }
        });
    }
}

SecondActivity.java

public class SecondActivity extends AppCompatActivity {

    private TextView tvData;

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

        tvData = findViewById(R.id.tv_data);

        Bundle bundle = getIntent().getExtras();
        if (bundle != null) {
            String username = bundle.getString("username");
            String password = bundle.getString("password");
            tvData.setText("Received data:\nUsername: " + username + "\nPassword: " + password);
        }
    }
}

XML代码：

activity_main.xml

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center">

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

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

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

</LinearLayout>

activity_second.xml

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center">

    <TextView
        android:id="@+id/tv_data"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="20sp"
        android:textStyle="bold"/>

</LinearLayout>