在两个 xml 之间传递 textvalue

Question

我在布局中有一个“登录”xml。而我的另一个xml是“列表”。

在我的应用程序中，用户使用电子邮件地址和密码登录应用程序，而不是显示他们的邮件列表。我是这样做的：

        public void onCreate(Bundle savedInstanceState) 
            {
            super.onCreate(savedInstanceState);
            // setContentView(R.layout.main);
            LoginScreen();
            }  

// I am receiving the email and password on the main layout for login page
        public void LoginScreen() 
            {
             setContentView(R.layout.main);  
             EditText emailTxt = (EditText) findViewById(R.id.txtMail);
             EditText passwordTxt = (EditText) findViewById(R.id.txtPassword);
             String email= epostaTxt.getText().toString();
         String password = parolaTxt.getText().toString();
// After receive, call the MailList() for connection and getting the list
             MailList()
            }

// and I use this email and password again into the MailList() for connection with server then receive the mail list

         public void MailList()
            { 
            setContentView(R.layout.list);
            EditText emailTxt = (EditText) findViewById(R.id.txtMail);
            EditText passwordTxt = (EditText)                                                        findViewById(R.id.txtPassword);
            String email= epostaTxt.getText().toString();
        String password = parolaTxt.getText().toString();
            Sending emain and password to the server etc...
            }

这只是现在，但此代码重复将继续。我只想一次从 Edittxt 获取此电子邮件和密码，并使用所有方法。而且这段代码也不起作用，Maillist 不显示列表，因为无法连接

我该怎么做？

Answer 1

如果我理解得很好，您只是想在您的活动之间传递数据，这里可能会有一些帮助：In Android: How do I get variables/data from one screen to another?

编辑：我的新答案，希望是好的答案： 只需创建两个变量来存储日期？

public class LoginScreen extends Activity{

private String email;
private String password;

    public void onCreate(Bundle savedInstanceState) 
        {
        super.onCreate(savedInstanceState);
        // setContentView(R.layout.main);
        LoginScreen();
        }  

    // I am receiving the email and password on the main layout for login page
    public void LoginScreen() 
        {
        setContentView(R.layout.main);  
        EditText emailTxt = (EditText) findViewById(R.id.txtMail);
        EditText passwordTxt = (EditText) findViewById(R.id.txtPassword);
        email= emailTxt.getText().toString();
        password = passwordTxt.getText().toString();
        // After receive, call the MailList() for connection and getting the list
        MailList()
        }

    // and I use this email and password again into the MailList() for connection with server then receive the mail list
     public void MailList()
        { 
        setContentView(R.layout.list);

        //Sending emain and password to the server etc...
        //just use the email and password stored above
        yourFunctionToSend(email,password);
        }
}