set visibility of a button if edittext is not empty

Question

I have a submit button where I need to set the visibility of the button based on if a edittext field is empty or not.

I have below snippet in the onCreate method of the activity

submitIssue.setVisibility(View.VISIBLE);

if(issueTxt.getText().toString() == ""){
    submitIssue.setVisibility(View.INVISIBLE);
}else{
    submitIssue.setVisibility(View.VISIBLE);
}

On launching the application the button displays even though the edittext is empty. What is wrong with my approach?

Please what has this question done to get downvote. does everyone not learn on their own pace — Float, Jan 12 '18 at 09:54
Possible duplicate of [this](https://stackoverflow.com/questions/19432553/if-edittext-gettext-tostring-dont-work) — Jyoti JK, Jan 12 '18 at 10:01

score 0 · Answer 1 · answered Jan 12 '18 at 09:51

0

Try this-:

if(TextUtils.isEmpty(issueTxt.getText().toString()))
{
   submitIssue.setVisibility(View.INVISIBLE);
}
else
{
   submitIssue.setVisibility(View.VISIBLE);
}

answered Jan 12 '18 at 09:51

Shivam Oberoi

1,447
1
9
18

score 0 · Accepted Answer · answered Jan 12 '18 at 09:52

Use like this

 editText.addTextChangedListener(new TextWatcher() {
                @Override
                public void beforeTextChanged(CharSequence s, int start, int count, int after) {

                }

                @Override
                public void onTextChanged(CharSequence s, int start, int before, int count) {
                   if (s.toString().length()<1){
                      button.setVisibility(View.GONE)
                   }else button.setVisibility(View.VISIBLE)
                }

                @Override
                public void afterTextChanged(Editable s) {

                }
            });

score 0 · Answer 3 · answered Jan 12 '18 at 09:53

0

Use Android provides TextUtils.isEmpty() utility method:

if(TextUtils.isEmpty(issueTxt.getText().toString())){
    submitIssue.setVisibility(View.INVISIBLE);
} else {
    submitIssue.setVisibility(View.VISIBLE);
}

answered Jan 12 '18 at 09:53

AlexTa

5,133
3
29
46

score 0 · Answer 4 · answered Jan 12 '18 at 09:53

Try this one

   if(editText.getText().toString().trim().equals("")){

}

Or

if(editText.getText().toString().trim().length==0){
}

Always try to use trim() function when checking edittext is empty or not because if you use without trim() function than space(" ") can create issue for you...

editText.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
               // Add your code here
            }

            @Override
            public void afterTextChanged(Editable s) {

            }
        });

you can use TextChangeLister for other process.

score 0 · Answer 5 · answered Jan 12 '18 at 09:53

You have to use TextWatcher() for achieve this.

and For Matching string you should use equals() method instead od ==

eg :

String1.equals(String2)

Refer the Below Links:

TexWatcher fo Android

TextChangerListener Android

You can use TextWatcher for your edittext,

eg:

 editText.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                   if(TextUtils.isEmpty(issueTxt.getText().toString()))
                   {
                        submitIssue.setVisibility(View.INVISIBLE);
                   }
                   else
                   {
                        submitIssue.setVisibility(View.VISIBLE);
                   } 

            }

            @Override
            public void afterTextChanged(Editable s) {
                // You can do Validation here too
            }

score 0 · Answer 6 · answered Jan 12 '18 at 09:58

0

Try this:

submitIssue.setVisibility(View.VISIBLE);

    if(issueTxt.getText().toString().length() == 0){
        submitIssue.setVisibility(View.INVISIBLE);
    }else{
        submitIssue.setVisibility(View.VISIBLE);
    }

answered Jan 12 '18 at 09:58

Shree

354
2
21

set visibility of a button if edittext is not empty

6 Answers6