Android 限制edittext 整数和小数位数 过滤器(详解)

写了一个过滤器，根据需要限制edittext输入的整数和小数位，如下代码：

package allone.verbank.apad.client.component;

import android.text.inputfilter;
import android.text.spanned;

/**
 * 
 * @title: componentdigitctrlfilter.java 
 * @package allone.verbank.apad.client.component 
 * @description: 为了限制edit根据商品输入指定的位数和小数位
 * @author qiulinhe [e-mail] 
 */
public class componentdigitctrlfilter implements inputfilter {

 private boolean isjpy;
 private int digit;

 public componentdigitctrlfilter(boolean isjpy, int digit) {
 this.isjpy = isjpy;
 this.digit = digit;
 }

 @override
 public charsequence filter(charsequence source, int start, int end, spanned dest, int dstart, int dend) {
 // 删除等特殊字符，直接返回
 if ("".equals(source.tostring())) {
 return null;
 }
 string orivalue = dest.tostring();
 stringbuffer sb = new stringbuffer(orivalue);
 sb.append(source);
 string newvalue = sb.tostring();
 string[] newvaluevec = newvalue.split("\\.");
 if (newvaluevec.length == 2) {
 double number = double.parsedouble(newvaluevec[0]);
 boolean numberflag = true;
 if (isjpy) {
 numberflag = ((number - 999 > 0.000001) ? false : true);
 } else {
 numberflag = ((number - 99 > 0.000001) ? false : true);
 }

 boolean digitflag = true;
 try {
 string digitnumber = newvaluevec[1];
 digitflag = digitnumber.tochararray().length > digit ? false : true;
 } catch (exception ex) {
 digitflag = false;
 }
 if (numberflag && digitflag) {
 return source;
 } else {
 return "";
 }
 } else {
 double value = double.parsedouble(newvalue);
 if (isjpy) {
 return value > 999 ? "" : source;
 } else {
 return value > 99 ? "" : source;
 }
 }
 // dest.subsequence(dstart, dend)
 }
}

逻辑是判断传入的isjpy是否是要整数两位小数三位数的，然后对输入的数据进行限制，只需要将过滤器添加到对应的edittext控件即可，如下：stopedittext.setfilters(new inputfilter[] { new componentdigitctrlfilter(digit == 2, digit) });

以上这篇android 限制edittext 整数和小数位数 过滤器(详解)就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。