Question

您好我有一个登录表单，其中有两个EditText，一个用于电子邮件，一个用于密码，一个登录按钮，当用户按下按钮我想要对表单进行一些验证。例如，如果未输入到EditText中，则更改提示颜色和EditText的文本，这是迄今为止我尝试过的内容。我得到它所以它注销为“”但它没有改变提示。

Editable emailInputEditable = emailInput.getText();
    String emailInputString = emailInputEditable.toString();
    Editable passwordInputEditable = passwordInput.getText();
    String passwordInputString = passwordInputEditable.toString();

    Log.v("loginForm", "emailInputString = " + emailInputString);
    Log.v("loginForm", "passwordInputString = " + passwordInputString);

    if(emailInputString ==""){emailInput.setHint("Please enter your email");}
    if(passwordInputString ==""){passwordInput.setHint("Please enter your password");}

Answer 1

使用此

if(emailInputString.length==0){emailInput.setHint("Please enter your email");}
    if(passwordInputString.length==0){passwordInput.setHint("Please enter your password");}

要禁用登录按钮，请使用以下代码

if(emailInputString.length==0 && passwordInputString.length==0)
signbtn.setVisibility(View.GONE);

Answer 2

试试这个：

if(emailInputString.equals("")){emailInput.setHint("Please enter your email");}
if(passwordInputString.equals("")){passwordInput.setHint("Please enter your password");}

您将此代码放入按钮点击事件

Answer 3

比较字符串使用equals() ...

编辑。太晚了：/

Answer 4

试试这个..

    if(!TextUtils.isEmpty(emailInput.getText()){

            if(!TextUtils.isEmpty(passwordInput.getText())){

                // Perfom your logic here..

            }else
                passwordInput.setError("Please enter your password");

        }else
            emailInput.setError("Please enter your email..");

快乐编码：）

在Android中管理EditText状态

4 个答案: