Java tutorial
//package com.java2s; import java.io.File; import android.os.Environment; import android.util.Log; public class Main { private static final String tag = "ActivityHelper"; public static String createTbutlerFolder() { String folder = "/sdcard/tbutler"; if (checkState()) { try { File file = new File(folder); if (!file.exists()) { file.mkdir(); } } catch (Exception er) { Log.e(tag, "error creating folder", er); } } return folder + "/"; } public static boolean checkState() { boolean mExternalStorageAvailable = false; String state = Environment.getExternalStorageState(); if (Environment.MEDIA_MOUNTED.equals(state)) { mExternalStorageAvailable = true; } return mExternalStorageAvailable; } }