Java tutorial
//package com.java2s; import java.util.List; public class Main { public static String toString(List<String> permission) { if (permission == null || permission.isEmpty()) { return ""; } return toString(permission.toArray(new String[permission.size()])); } public static String toString(String[] permission) { if (permission == null || permission.length <= 0) { return ""; } StringBuilder sb = new StringBuilder(); for (String p : permission) { sb.append(p.replaceFirst("android.permission.", "")); sb.append(","); } sb.deleteCharAt(sb.length() - 1); return sb.toString(); } }