edittext.removeTextChangedListener(textWatcher);//关闭当前设置的textWatcher
edittext.setText();
edittext.addTextChangedListener(textWatcher);//再次载入该textWatcher

TextWatcher textwatcher = new TextWatcher(){
	 @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {}
     @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {}
     @Override
            public void afterTextChanged(Editable editable) {} 
};