public void afterTextChanged(Editable s) {
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
public void onTextChanged(CharSequence s, int start, int before,
int count) {
}
}
------------------------------------------------------------------------
EditText et = (EditText)findViewById(R.id.et);
et.addTextChangedListener(new TextWatch());