限制edittext只能输入小数点后两位

            if (s.toString().contains(".")) {
                if (s.length() - 1 - s.toString().indexOf(".") > 2) {
                    s = s.toString().subSequence(0,
                            s.toString().indexOf(".") + 3);
                    editTotlaMoney.setText(s);
                    editTotlaMoney.setSelection(s.length());
                }
            }
            if (s.toString().trim().substring(0).equals(".")) {
                s = "0" + s;
                editTotlaMoney.setText(s);
                editTotlaMoney.setSelection(2);
            }

            if (s.toString().startsWith("0")
                    && s.toString().trim().length() > 1) {
                if (!s.toString().substring(1, 2).equals(".")) {
                    editTotlaMoney.setText(s.subSequence(0, 1));
                    editTotlaMoney.setSelection(1);
                    return;
                }
            }