How to check text availability in EditText?

Question

There are two EditText and a submit button with the onClick() method.
When you click on a button in the method, the code for sending data from the fields to the server is triggered.
You need to check the number of characters for the minimum value (6 characters). And check that both EditText fields are not empty.

Here is my code:

 user = (EditText) findViewById(R.id.user); password = (EditText) findViewById(R.id.password); l_user = user.getText().toString(); p_user = password.getText().toString(); if (l_user == "") { setContentView(R.layout.act_login); } else { if (p_user == "") { setContentView(R.layout.act_login); } else { // код отправки данных из форм на сервер

This method of checking for filling for some reason does not work correctly. If both fields are empty, then everything works, and if you enter a letter in one of the fields, the script starts sending a request. But it should not, because the second field is empty!
The code shows that if at least one of the fields is empty, the screen with the same registration form is loaded, but, as I said, the check does not work well.

How to make a check on the number of characters entered in the EditText field?

@eugeneek however, the author claims that if both fields are empty, the request does not go away.
@ iFr0z and why compare the lines with == without good reason?
and in your case "".equals(l_user) , which checks for emptiness will return false , even when l_user == null .

Accepted Answer · 2017-07-12T14:02:35

You do not need to compare strings, it is easier to check the number of characters in a string. Something like this:

 if (l_user.length() > 5 && p_user.length() > 5) { // код отправки данных из форм на сервер }

Answer 2 · 2017-07-12T14:14:39

Why convert to strings at all? Everything works fine anyway:

 if (user.getText().length() == 0 || password.getText().length() == 0) { setContentView(R.layout.act_login); } else { // код отправки данных из форм на сервер }

Less code, easier to read.

From the question is not entirely clear what to check for at least 6 characters.

moonDay moonDay one · Answer 3 · 2017-08-06T07:03:57

Check strings for emptiness as follows:

 if(l_user.equals("")) { //строка пуста }

Here you have reading on this topic: http://developer.alexanderklimov.ru/android/java/string.php#equals

How to check text availability in EditText?

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