Here you can find the source of hasExternalStorage()
public static boolean hasExternalStorage()
//package com.java2s; /*/*from w ww .j av a2 s . c om*/ * Copyright (C) 2013 WhiteCat ?? (www.thinkandroid.cn) * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import android.os.Environment; public class Main { public static boolean hasExternalStorage() { Boolean externalStorage = Environment.getExternalStorageState() .equals(android.os.Environment.MEDIA_MOUNTED); return externalStorage; } }