现有两个Activity，分别为UserlnfoActivity和ShowActivity中通过一个"查看"按钮切换界面到ShowActivity，并传递如下三个参数:id=1；username="eric":state=Ture,且ShowActivity使用Toast显示接收到的参数，请写出两个Activity中的核心代码

UserInfoActivity中的代码：

public class UserInfoActivity extends AppCompatActivity {
    private Button mBtnView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_user_info);
        
        mBtnView = findViewById(R.id.btn_view);
        mBtnView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(UserInfoActivity.this, ShowActivity.class);
                intent.putExtra("id", 1);
                intent.putExtra("username", "eric");
                intent.putExtra("state", true);
                startActivity(intent);
            }
        });
    }
}

ShowActivity中的代码：

public class ShowActivity extends AppCompatActivity {

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

        Intent intent = getIntent();
        int id = intent.getIntExtra("id", 0);
        String username = intent.getStringExtra("username");
        boolean state = intent.getBooleanExtra("state", false);

        String message = "id: " + id + "\nusername: " + username + "\nstate: " + state;
        Toast.makeText(this, message, Toast.LENGTH_SHORT).show();
    }
}