限制EditText只能输入小数点后两位

设置EditText只能输入小数点后两位，在价格等有限制的输入时特别有效

TextWatcher textWatcher = new TextWatcher() {@Overridepublic void onTextChanged(CharSequence s, int start, int before,int count) {if (s.toString().contains(".")) {if (s.length() - 1 - s.toString().indexOf(".") > 2) {s = s.toString().subSequence(0,s.toString().indexOf(".") + 3);priceEdit.setText(s);priceEdit.setSelection(s.length());}}if (s.toString().trim().substring(0).equals(".")) {s = "0" + s;priceEdit.setText(s);priceEdit.setSelection(2);}if (s.toString().startsWith("0")&& s.toString().trim().length() > 1) {if (!s.toString().substring(1, 2).equals(".")) {priceEdit.setText(s.subSequence(0, 1));priceEdit.setSelection(1);return;}}}@Overridepublic void beforeTextChanged(CharSequence s, int start, int count,int after) {}@Overridepublic void afterTextChanged(Editable s) {}};