Adding a Dash in the editText automatically in Android

问题

Have a look at my codes:

txt_HomeNo.addTextChangedListener(new TextWatcher() {

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

            boolean flag = true;
            String eachBlock[] = txt_HomeNo.getText().toString().split("-");
            for (int i = 0; i < eachBlock.length; i++) {
                if (eachBlock[i].length() > 3) {
                    flag = false;
                }
            }

            if (flag) {

                txt_HomeNo.setOnKeyListener(new OnKeyListener() {

                    @Override
                    public boolean onKey(View v, int keyCode, KeyEvent event) {

                        if (keyCode == KeyEvent.KEYCODE_DEL)
                            keyDel = 1;
                        return false;
                    }
                });

                if (keyDel == 0) {

                    if (((txt_HomeNo.getText().length() + 1) % 4) == 0) {

                        if (txt_HomeNo.getText().toString().split("-").length <= 3) {
                            txt_HomeNo.setText(txt_HomeNo.getText() + "-");
                            txt_HomeNo.setSelection(txt_HomeNo.getText().length());
                        }
                    }
                    a = txt_HomeNo.getText().toString();
                } else {
                    a = txt_HomeNo.getText().toString();
                    keyDel = 0;
                }

            } else {
                txt_HomeNo.setText(a);
            }

        }

The maximum length of the phone number is only 7. And when I already inputted 3 digits, it appends dash (that's what I'd like to happen) but my problem here is that the next 3 digits also appends dash (Like this: 511-871-)... My question is how can I do the codings with the next 4 digit number with having a dash on it. Please help me with this. thanks!

回答1:

Try this

@Override
public void afterTextChanged(Editable text) {     


    if (text.length() == 3 || text.length() == 7) {
        text.append('-');
    }


}

or all of this

private boolean isFormatting;
private boolean deletingHyphen;
private int hyphenStart;
private boolean deletingBackward;

@Override
public void afterTextChanged(Editable text) {
    if (isFormatting)
        return;

    isFormatting = true;

    // If deleting hyphen, also delete character before or after it
    if (deletingHyphen && hyphenStart > 0) {
        if (deletingBackward) {
            if (hyphenStart - 1 < text.length()) {
                text.delete(hyphenStart - 1, hyphenStart);
            }
        } else if (hyphenStart < text.length()) {
            text.delete(hyphenStart, hyphenStart + 1);
        }
    }
    if (text.length() == 3 || text.length() == 7) {
        text.append('-');
    }

    isFormatting = false;
}

@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
    if (isFormatting)
        return;

    // Make sure user is deleting one char, without a selection
    final int selStart = Selection.getSelectionStart(s);
    final int selEnd = Selection.getSelectionEnd(s);
    if (s.length() > 1 // Can delete another character
            && count == 1 // Deleting only one character
            && after == 0 // Deleting
            && s.charAt(start) == '-' // a hyphen
            && selStart == selEnd) { // no selection
        deletingHyphen = true;
        hyphenStart = start;
        // Check if the user is deleting forward or backward
        if (selStart == start + 1) {
            deletingBackward = true;
        } else {
            deletingBackward = false;
        }
    } else {
        deletingHyphen = false;
    }
}

回答2:

I think , I have easy solution to doing this, look at attached screenshot

Appending / after 2 and 5 digit to get DOB.

Appending and Deleting both are working without cyclic problem.

editeTextDob.addTextChangedListener(new TextWatcher() {
            int prevL = 0;

            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
                prevL = dob.getText().toString().length();
            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void afterTextChanged(Editable editable) {
                int length = editable.length();
                 if ((prevL < length) && (length == 2 || length == 5)) {
                    editable.append("/");
                }
            }
        });

回答3:

Use this code This code working for me It will help you

        editText.addTextChangedListener(new TextWatcher() {
        int prevL = 0;
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {
            prevL = editText.getText().toString().length();
        }

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

        }

        @Override
        public void afterTextChanged(Editable s) {
            int length = s.length();
            if ((prevL < length) && (length == 2 || length == 5)) {
                String data = editText.getText().toString();
                editText.setText(data + "/");
                editText.setSelection(length + 1);


            }

        }
    });

回答4:

Too late but can help the other people !

  edtMoneyIntMin.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) {
            try {
                int edtInteger = Integer.valueOf(edtMoneyIntMin.getText().toString());
                new DecimalFormat("1,000,000,000");
                String myString = NumberFormat.getInstance().format(edtInteger).replace(",", "/");
                HOUSE_COST_MIN = myString;
                txtMoneyIntMin.setText(myString);
            } catch (NumberFormatException e) {
                e.printStackTrace();
            } catch (NullPointerException e) {
                e.printStackTrace();
            }
        }

        @Override
        public void afterTextChanged(Editable s) {

        }
    });

回答5:

For this kind of request i usually rely on editText Masking technique.

Here is one library that works well:

https://github.com/egslava/edittext-mask

but the one i like the best for handling deleting characters is :

compile 'com.redmadrobot:inputmask:2.3.0'

it has a phone number example in the readme.

来源：https://stackoverflow.com/questions/16976173/adding-a-dash-in-the-edittext-automatically-in-android