EditText onTextChanged ,Search in sqlite

In my project I have an EditText. When I enter text to EditText, onTextChanged function it search the entered text to sqlite and show the search list.It is Ok, but the problem is in BackSpace.It search until one char in EditText.Then, if no char in EditText i want to show the original List(ListView).How can i do or catch event for backspacing on char in EditText(Reset ListView) condition.