Java tutorial
//package com.java2s; import java.io.File; import android.os.Environment; public class Main { private static String sdState = Environment.getExternalStorageState(); public static void creatFile(String fileName) { if (sdState.equals(Environment.MEDIA_MOUNTED)) { File file = new File( Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + fileName); if (!file.exists()) { file.mkdir(); } } } }