Java tutorial
//package com.java2s; //License from project: Open Source License import android.text.TextUtils; public class Main { public static String changeTel(String pNumber) { if (!TextUtils.isEmpty(pNumber) && pNumber.length() > 6) { StringBuilder sb = new StringBuilder(); for (int i = 0; i < pNumber.length(); i++) { char c = pNumber.charAt(i); if (i >= 3 && i <= 6) { sb.append('*'); } else { sb.append(c); } } return sb.toString(); } return pNumber; } }