Java tutorial
//package com.java2s; import java.io.File; import android.os.Environment; public class Main { static String mPrivatePath = "/cartman_mm/"; public static String createNewPrivateFolder(String folderName) { String folderPathString = getSDPath() + mPrivatePath + folderName; if (folderPathString.charAt(folderPathString.length() - 1) != '/') { folderPathString += '/'; } File path = new File(folderPathString); if (!path.exists()) { path.mkdir(); } return folderPathString; } private static String getSDPath() { return Environment.getExternalStorageDirectory().getPath(); } }