Android字符串比较

Question

I am trying to compare two EditTexts when the user clicks a button. However the IF statement returns true even if the two strings are different.

    final EditText email= (EditText)findViewById(R.id.txtEmail);
    final EditText emailconf= (EditText)findViewById(R.id.txtEmailConf);
    final EditText password = (EditText)findViewById(R.id.txtPassword1);
    final EditText passconf = (EditText)findViewById(R.id.txtPasswordConf);

    final String emailInput = email.getText().toString();
    final String emailconfInput = emailconf.getText().toString();
    final String passinput = password.getText().toString();
    final String passconfinput = passconf.getText().toString();

    //When our register button is pressed
 btnRegister.setOnClickListener(new View.OnClickListener(){

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            if(emailInput.equalsIgnoreCase(emailconfInput)){
                if(passinput.equalsIgnoreCase(passconfinput)){
                    new RegisterTask().execute();
                }
                else{
                    displayDialogue("Error", "Your password's do not match, please try again", "Re-input details");

                }

            }else{
                displayDialogue("Error", "Your email's do not match, please try again", "Re-input details");

            }


        }

    });

If the two are correct then it will run an Asynctask (RegisterTask)

Any help would be great, thanks

Answer 1

final String passinput = password.getText().toString();
final String passconfinput = passconf.getText().toString();

Move this part to the onClick() so that the text is pulled from the EditText s only then. In onCreate() they're both empty and two empty strings will match.

Answer 2

Are you sure it is giving true in every case? Apart from equals method try compareTo method it will work fine

Answer 3

I recommend to you Sanitise both fields, because if the user puts an empty space at the beginning or end of the field, equalsIgnoreCase will return false.

Try methods like trim() , remove invalid chars, and then compare, it's up to what you want to check.

Answer 4

if(emailInput == emailconfInput){

如果您更改为不应该有问题...哦，我也不建议忽略密码检查的大小写。