Java tutorial
//package com.java2s; import android.os.Environment; public class Main { public static boolean GetSdCardFile() { String str = Environment.getExternalStorageState(); return (!IsEmpty(str)) && ((str.equals("mounted")) || (str.equals("mounted_ro"))) && (Environment.getExternalStorageDirectory() != null); } public static boolean IsEmpty(String paramString) { return (paramString == null) || (paramString.length() <= 0); } }