Java tutorial
//package com.java2s; /* * Copyright (C) 2012 The Android Open Source Project * * 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 java.io.File; import android.os.Environment; public class Main { /** * @return the root of the filesystem containing the given path */ public static File getFilesystemRoot(String path) { File cache = Environment.getDownloadCacheDirectory(); if (path.startsWith(cache.getPath())) { return cache; } File external = Environment.getExternalStorageDirectory(); if (path.startsWith(external.getPath())) { return external; } throw new IllegalArgumentException("Cannot determine filesystem root for " + path); } }