android-textwatcher

In my Android project I have had to add a TextChangedListener (TextWatcher) to a edit text view. And there are three parts in it. onTextChanged beforeTextChanged afterTextChanged What are the differents of these three. I have had to implement a search of a table on the key lisner and for my case all these three looks the same. Also they functioned the same. When I input a part of a product name the table redraws with only those products contains that entered text in it. But I used the afterTextChanged part. My code is EditProduct.addTextChangedListener(new TextWatcher() { @Override public void

Under what circumstances should I use afterTextChanged instead of onTextChanged and vice versa? Malcolm These events are called in the following order: beforeTextChanged(CharSequence s, int start, int count, int after) . This means that the characters are about to be replaced with some new text. The text is uneditable. Use: when you need to take a look at the old text which is about to change. onTextChanged(CharSequence s, int start, int before, int count) . Changes have been made, some characters have just been replaced. The text is uneditable. Use: when you need to see which characters in