Here you can find the source of isSDCardPresent()
public static boolean isSDCardPresent()
//package com.java2s; /**// w w w . ja v a2 s . c o m * Copyleft 2011 Singularity.Sg This file is part of NLBroid. NLBroid is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. NLBroid is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with NLBroid. If not, see http://www.gnu.org/licenses/. **/ public class Main { public static boolean isSDCardPresent() { return android.os.Environment.getExternalStorageState().equals( android.os.Environment.MEDIA_MOUNTED); } }