Java tutorial
//package com.java2s; import java.io.File; import java.io.FileOutputStream; import java.util.Properties; public class Main { private static String CONFIG_FILE_PATH = "/mnt/sdcard/config.properties"; /** * Save config file. */ private static void saveConfig(Properties properties) { try { File file = new File(CONFIG_FILE_PATH); if (!file.exists()) file.createNewFile(); FileOutputStream s = new FileOutputStream(file); properties.store(s, ""); } catch (Exception ex) { ex.printStackTrace(); } } }