How to declare the button text with counter

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Android

I have a listView with checkBox. When checkBox is checked/unchecked, it will count and display the number in `button` `delete` setText. If the counter is equal to 0, then it will only display `DELETE`, otherwise it will display `DELETE (with the counter)`. But the problem is the delete still setText `DELETE (with the counter)` although the counter is 0.

holder.ckbox.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        if (((CheckBox) v).isChecked()) {
                            int getPosition = (Integer) v.getTag();  // Here we get the position that we have set for the checkbox using setTag.
                            search.get(getPosition).setSelected(((CheckBox)v).isChecked()); // Set the value of checkbox to maintain its state.
                            checkBoxCounter ++;
                            delete.setText("DELETE"+""+"("+ checkBoxCounter +")");
                        } else
                        {
                            if(checkBoxCounter==0)
                            {
                                delete.setText("DELETE");
                            }
                            else {
                                int getPosition = (Integer) v.getTag();  // Here we get the position that we have set for the checkbox using setTag.
                                search.get(getPosition).setSelected(((CheckBox) v).isChecked()); // Set the value of checkbox to maintain its state.
                                checkBoxCounter--;
                                delete.setText("DELETE" + "" + "(" + checkBoxCounter + ")");
                            }
                        }
                    }
                });

What I have tried:

The above code is what I have tried, but no luck