Automatically add dash in phone number in Android

Question

Instead of 5118710, it should be 511-8710. I\'d like to add a dash after the user the user inputted 3 digits already in the EditText. The maximum length of

Answer 1

I have a few small changes to the solution of neo108 so it can work with both soft keyboard and hard keyboard, in my code for example the edittext will follow the rule to automatically add " " at position 5 and 9.

txtPhone.addTextChangedListener(new TextWatcher() {

        int keyDel;

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

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
            txtPhone.setOnKeyListener(new View.OnKeyListener() {
                @Override
                public boolean onKey(View view, int keyCode, KeyEvent keyEvent) {
                    if (keyCode == KeyEvent.KEYCODE_DEL) {
                        keyDel = 1;
                    }
                    return false;
                }
            });

            String currentString = txtPhone.getText().toString();
            int currentLength = txtPhone.getText().length();

            if (currentLength == 5 || currentLength == 9) {
                keyDel = 1;
            }

            if (keyDel == 0) {
                if (currentLength == 4 || currentLength == 8) {
                    txtPhone.setText(txtPhone.getText() + " ");
                    txtPhone.setSelection(txtPhone.getText().length());
                }
            } else {
                if (currentLength != 5 && currentLength != 9) {
                    keyDel = 0;
                } else if ((currentLength == 5 || currentLength == 9)
                        && !" ".equals(currentString.substring(currentLength - 1, currentLength))) {
                    txtPhone.setText(currentString.substring(0, currentLength - 1) + " "
                            + currentString.substring(currentLength - 1, currentLength));
                    txtPhone.setSelection(txtPhone.getText().length());
                }
            }
        }