CODEWITHSUNDEEP
androidandroid-studio
Anugrah
Anugrah

Reputation: 39

EditText addTextChangedListener not working properly

I have two EditText input, when text changes after a calculation i have to display result on a textView in same activity. addTextChangedListener is not working for me

Activity.java code:
width.addTextChangedListener(new TextWatcher() {
        public void beforeTextChanged(CharSequence s, int start, int count,
                                      int after) {
        }

        public void afterTextChanged(Editable s) {

        }

        public void onTextChanged(CharSequence s, int start, int before,
                                  int count) {
            if(!s.equals("") ) {
                TextView perimeterdetails = (TextView) findViewById(R.id.perimeterdetails);
                perimeterdetails.setText(s);
            }
        }
    });

XML code:

<EditText
    android:id="@+id/width"
    android:layout_width="0dp"
    android:background="@drawable/edittextbackground"
    android:layout_weight="1"
    android:inputType="numberDecimal"
    android:layout_height="wrap_content"/>
<TextView
    android:id="@+id/perimeterdetails"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:text="TextView" />

Upvotes: 1

Views: 2413

Answers (6)

jhayjhay
jhayjhay

Reputation: 78

Try this :) 

TextView perimeterdetails = (TextView) findViewById(R.id.perimeterdetails);
        width.addTextChangedListener(new TextWatcher() {
                public void beforeTextChanged(CharSequence s, int start, int count,
                                              int after) {
                }

                public void afterTextChanged(Editable s) {

                }

                public void onTextChanged(CharSequence s, int start, int before,
                                          int count) {
                    if(s.length() <= 0) {

                        perimeterdetails.setText(s);
                    }
                }

});

Upvotes: 0

Pemba Tamang
Pemba Tamang

Reputation: 1052

do not findViewById inside on Textchanged. Do it before adding the textchangelistener. in the onTextChange use

 if(!TextUtils.isEmpty(s)){
perimeterdetails.setText(s);
}

Upvotes: 0

Arnold Brown
Arnold Brown

Reputation: 1433

Try it

Change the condition :

if(!s.equals("")){}

to

if(s.length()!=0){}

Upvotes: 0

karan
karan

Reputation: 8853

change your code as below Define this in onCreate

TextView perimeterdetails = (TextView) findViewById(R.id.perimeterdetails);

and compare your string as below in onTextChanged

if(!TextUtils.isEmpty(s.toString())) {
                perimeterdetails.setText(s);
            }

Upvotes: 1

Sarath Sasi
Sarath Sasi

Reputation: 93

Try this

  TextView perimeterdetails = (TextView) findViewById(R.id.perimeterdetails);

    width.addTextChangedListener(new TextWatcher() {
        public void beforeTextChanged(CharSequence s, int start, int count,
                                      int after) {
        }

        public void afterTextChanged(Editable s) {

        }

        public void onTextChanged(CharSequence s, int start, int before,
                                  int count) {
            if(!s.equals("") ) {

                perimeterdetails.setText(s);
            }
        }
    });

Upvotes: 0

Erfan
Erfan

Reputation: 3353

Cause you are define your text view in onTextChanged

cut this line TextView perimeterdetails = (TextView) findViewById(R.id.perimeterdetails);

befor addTextChangedListener

Upvotes: 0

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