直播app开发搭建，EditText保留小数位数的问题

package com.shentaiwang.jsz.savepatient.util;<br>import android.text.Editable;<br>import android.text.TextWatcher;<br>import android.widget.EditText;<br>/**<br>* Created by jsz on 2017/7/22.<br>* 保留小数位数<br>*/<br>public class RetainDecimal {<br>/**<br>*<br>* @param editText EditText<br>* @param pointNo 保留的小数位数<br>*/<br>public static void setRetainPoint(final EditText editText, final int pointNo) {<br>editText.addTextChangedListener(new TextWatcher() {<br>@Override<br>public void onTextChanged(CharSequence s, int start, int before,<br>int count) {<br>if (s.toString().contains(".")) {<br>if (s.length() - 1 - s.toString().indexOf(".") > pointNo) {<br>s = s.toString().subSequence(0,<br>s.toString().indexOf(".") + pointNo + 1);<br>editText.setText(s);<br>editText.setSelection(s.length());<br>}<br>}<br>if (s.toString().trim().substring(0).equals(".")) {<br>s = "0" + s;<br>editText.setText(s);<br>editText.setSelection(2);<br>}<br>if (s.toString().startsWith("0")<br>&& s.toString().trim().length() > 1) {<br>if (!s.toString().substring(1, 2).equals(".")) {<br>editText.setText(s.subSequence(0, 1));<br>editText.setSelection(1);<br>return;<br>}<br>}<br>}<br>@Override<br>public void beforeTextChanged(CharSequence s, int start, int count,<br>int after) {<br>}<br>@Override<br>public void afterTextChanged(Editable s) {<br>// TODO Auto-generated method stub<br>}<br>});<br>}<br>}