How to implement on one method of TextWatcher in android?

Question

I have an app in which i have lots of edit text but in some edit text i only want to implement only one method of TextWatcher. How do i do that kindly guide.

code:-

private TextWatcher m_textWatcher = 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) {
        isFieldsEmpty();
    }

    @Override
    public void afterTextChanged(Editable s) {
        m_mainLayout.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                int heightDiff = m_mainLayout.getRootView().getHeight() - m_mainLayout.getHeight();
                if (!(heightDiff > RewardUtil.dpToPx(mContext, 200))) { // if more than 200 dp, it's probably a keyboard...
                    m_otpEditText.clearFocus();
                }
            }
        });
    }
};
 m_otpEditText.addTextChangedListener(m_textWatcher);

Do you need to do perform action on text change in multiple editexts? — PEHLAJ, Apr 19 '17 at 11:02
no i need to implement only one method of textwatcher not whole — Raghav, Apr 19 '17 at 11:03

score 2 · Answer 1 · answered Apr 19 '17 at 11:04

Create metod lke this.

   public static class MyTextWatcher implements TextWatcher {

        private EditText mEditText;

        public MyTextWatcher(EditText editText) {
            mEditText = editText;
        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
            oldText = mEditText.toString();
        }
        ....
    }

And use like this...

  m_otpEditText.addTextChangedListener(new MyTextWatcher(mFirstEditText));

It will help you. Thanks.

score 2 · Answer 2 · answered Apr 19 '17 at 11:11

First of all, you can create a class as follows :

public class CustomTextWatcher implements 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) {

    }

    @Override
    public void afterTextChanged(Editable s) {

    }
}

Thereafter, just override the method/s you need. Suppose you need only onTextChanged method, then you can do as follows :

m_otpEditText.addTextChangedListener(new CustomTextWatcher() {

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            }
        });

score 0 · Answer 3 · answered Apr 19 '17 at 11:25

0

TextWatcher class gives you flexibility to override methods whichever you need. If you really need only one method then override only one, but you have to always implement all methods .

answered Apr 19 '17 at 11:25

Mansuu....

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How to implement on one method of TextWatcher in android?

3 Answers3