Question

如何从班级中获取EditText？我无法从EditText.getText().toString()获取字符串。它是null。

public class SignUpModel  {
    String email;
    Context context;

    public SignUpModel(Context context) {
        this.context = context;
    }

    public String getEmail() {
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View layout=inflater.inflate(R.layout.activity_sign_up, null);
        EditText signup_email =(EditText) layout.findViewById(R.id.signup_email);
        email = signup_email.getText().toString();
        Log.v("email",signup_email.getText().toString());
        return email;
    }

}

Answer 1

只需创建全局EditText变量，然后获取它。但是，在使用它之前检查null。

public class SignUpModel  {
    String email;
    Context context;
    private EditText signup_email;

    public SignUpModel(Context context) {
        this.context = context;
    }

    public String getEmail() {
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View layout=inflater.inflate(R.layout.activity_sign_up, null);
        signup_email =(EditText) layout.findViewById(R.id.signup_email);
        email = signup_email.getText().toString();
        Log.v("email",signup_email.getText().toString());
        return email;
    }
    public EditText getEmailEditText() {
       return signup_email;
    }

}

Answer 2

只需将字符串设为public static并在您的类中访问它.Put on editText更改侦听器并重新初始化您的字符串。希望它能为您提供帮助。

如何从类中获取EditText？

2 个答案: