Java tutorial
//package com.java2s; public class Main { private static final String INNER_UDID_DIR_PATH = "/data/local/tmp/.lemi_config"; private static final String INNER_UDID_FILE_PATH = "/data/local/tmp/.lemi_config/.udid"; private static void changeInnerFilePermission() { try { Runtime.getRuntime().exec("chmod 777 " + INNER_UDID_DIR_PATH); Runtime.getRuntime().exec("chmod 666 " + INNER_UDID_FILE_PATH); } catch (Exception e) { } } }