Android Studio if editText is empty

Question

I'm new to Android Studio, I want to display a toast when a button is pressed if one or both of two editText fields is empty? I've tried for 5 hours; about to die.

Possible duplicate of [Check if EditText is empty.](http://stackoverflow.com/questions/6290531/check-if-edittext-is-empty) — Amit Singh, Jun 24 '16 at 06:54

score 1 · Accepted Answer · answered Jun 24 '16 at 13:25

1

First off, create a new method in your class if you haven't already:

    public void checkIfEmpty(View v){
    if(editText.getText().toString().isEmpty() & editText2.getText().toString().isEmpty()){
       Toast.makeText(this, "EditText is empty", Toast.LENGTH_SHORT).show();
        }
    }

And in your xml, be sure to set the onClick to that method. If you're new to java and you didn't understand tell me.

answered Jun 24 '16 at 13:25

Ali Bdeir

4,151
10
57
117

Hey it worked but I'm trying to open a new activity if it is false. The code I have here opens the new activity regardless. – Patrick J. Jun 24 '16 at 20:04
public void log_in_sends_2(View view) { if (EditUsername.getText().toString().isEmpty() & EditPassword.getText().toString().isEmpty()) { Toast.makeText(this, "EditText is empty", Toast.LENGTH_SHORT).show(); { String LogIn_Button; LogIn_Button = ((Button) view).getText().toString(); if (LogIn_Button.equals("Log In")) { Intent intent = new Intent(this, LogIn.class); startActivity(intent); } } } } } – Patrick J. Jun 24 '16 at 20:05
Figured it out. Thank you. – Patrick J. Jun 24 '16 at 20:43

score 0 · Answer 2 · answered Jun 24 '16 at 06:54

0

You will have to set an onClickListener to your button. Then, inside it, add this code:

if(mTextView.getText().toString().equals("")){
  makeToast(mContext, "TextView is empty!", Toast.LENGTH_SHORT).show();
}

A few notes about this:

mTextView and mContext are initialized in your Java class outside the listener, so in order to use inside it they have to be declared final
When you call makeToast always remember to call show() at the end or it will never be displayed

answered Jun 24 '16 at 06:54

Aurasphere

3,841
12
44
71

What do you mean by declared final? – Patrick J. Jun 24 '16 at 07:18
Also I tries to use this code to set an onClickListener for the button by I'm getting errors, Button LogInButton = (Button) findViewById(R.I'd.button_logIn_Main); LogInButton.setonClickListener(new Button.on.ClickListener() { public void mybuttonid = (View view) { \\other code } – Patrick J. Jun 24 '16 at 07:19
By final I mean like this: final Context mContext = getActivity (); final TextView mTextView = (TextView) rootView.findViewById (R.id.myView); If you have other errors, please post them. – Aurasphere Jun 24 '16 at 07:24

score 0 · Answer 3 · edited May 23 '17 at 12:22

0

Courtesy Answer by cvaldemar here

EditText text1 = (EditText) findViewById(R.id.editUsername);
EditText text2 = (EditText) findViewById(R.id.userEmail);
name = text1.getText().toString();
email = text2.getText().toString();
if (name.matches("") || email.matches(""))
 {
    Toast.makeText(this, "You did not enter a username",Toast.LENGTH_SHORT).show();
    return;
}

edited May 23 '17 at 12:22

Community

1
1

answered Jun 24 '16 at 06:58

Amit Singh

2,698
21
49

You need to create the id by which you are fetching the EditTextFields in xml file – Amit Singh Jun 25 '16 at 05:19
After that you will be able to fetch the fields, the above id's are just for demos. This is how you can fetch the EditText and apply the condition and display the Toast. – Amit Singh Jun 25 '16 at 05:20

score 0 · Answer 4 · answered Jun 24 '16 at 09:03

Take values from editText on button click and compare them with string .

 btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                strEdt1 = editText1.getText().toString();
                strEdt2 =  editText2.getText().toString();;
                if (editText1.isEmpty() && editText2.isEmpty()) {
                    // Toast for editText1
                    editText1.requestFocus();
                }
                else if (editText2.isEmpty()) {
                    //  Toast for editText2
                    editText2.requestFocus();
                }
        else if (editText1.isEmpty()) {
                    //  Toast for editText2
                    editText1.requestFocus();
                }

            }
        });

Android Studio if editText is empty

4 Answers4