backspace key is not detecting in textwatcher

Question

In EditText where I want to add a letter counter. it counts properly but when I entered backspace it's also considered as a letter and count added by 1 which actually should be decremented by 1. my code is

text_feedback_text.addTextChangedListener(new TextWatcher()
        {
            public void afterTextChanged(Editable s) 
            {
                                int keyCode = 0;
                if(keyCode==KeyEvent.KEYCODE_DEL){
                    i--;
                    Log.d("back","backspace pressed"+i);
                }else 
                    i++;
                text_feedback_count.setText(String.valueOf(i) + " / " + String.valueOf(charCounts));
            }
            public void beforeTextChanged(CharSequence s, int start, int count, int after){}
            public void onTextChanged(CharSequence s, int start, int before, int count)
            {
                text_feedback_count.setText(String.valueOf(s.length()));
            }
        } 
        );

Please help me out when i clicking backspace its not detecting and also not printing on logcat.

Please reply if anybody have some clue.

Thank you!

1. TextWatcher is for watching text. 2. seems like you do not understand your own code : you assing 0 to keyCode `int keyCode = 0;` and then compare it to `KeyEvent.KEYCODE_DEL` ... i'm pretty sure that `KeyEvent.KEYCODE_DEL != 0` ... so `i--;` is never called ... — Selvin, Feb 27 '12 at 14:04
@Abhishek Karande also if we enter space then also TextWatcher listener not working...any help here? — CoDe, Jan 12 '13 at 11:29
http://stackoverflow.com/questions/12202047/detect-backspace-in-textwatcher — Damir Mailybayev, Dec 26 '16 at 06:34

score 0 · Answer 1 · answered Feb 27 '12 at 14:05

0

use OnKeyListener for you editText so you can detect any key press

editText.setOnKeyListener(new OnKeyListener() {                 
    @Override
    public boolean onKey(View v, int keyCode, KeyEvent event) {
           if(keyCode == KeyEvent.KEYCODE_DEL){  
             //Control comes here when backspace is clicked
             }
    return false        
        }
});

answered Feb 27 '12 at 14:05

Sunil Kumar Sahoo

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5

this doesn't work on all phones or all input types :( – Tony Ashworth Nov 08 '12 at 16:10
1

Based on what I see here, the comment above makes sense. http://stackoverflow.com/questions/4886858/android-edittext-deletebackspace-key-event#comments-4887323 – loeschg Apr 23 '13 at 21:39
This should work for hardware keyboards. Keyboard kind is not clear from the question, so I think this answer doesn't deserve downvotes. – naXa stands with Ukraine Jun 07 '14 at 16:40
Though it would be great to point out this limitation. – naXa stands with Ukraine Jun 07 '14 at 16:44
if(if(before>count), that mean before change the text was longer than curren, it mean we delete a letter (or more). – EsmaeelQash Sep 28 '17 at 18:57

backspace key is not detecting in textwatcher

1 Answers1