1 /* 2 * Copyright (C) 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.providers.downloads; 17 18 import android.content.ContentUris; 19 import android.net.Uri; 20 import android.provider.MediaStore; 21 22 public class MediaStoreDownloadsHelper { 23 24 private static final String MEDIASTORE_DOWNLOAD_FILE_PREFIX = "msf:"; 25 private static final String MEDIASTORE_DOWNLOAD_DIR_PREFIX = "msd:"; 26 getDocIdForMediaStoreDownload(long id, boolean isDir)27 public static String getDocIdForMediaStoreDownload(long id, boolean isDir) { 28 return (isDir ? MEDIASTORE_DOWNLOAD_DIR_PREFIX : MEDIASTORE_DOWNLOAD_FILE_PREFIX) + id; 29 } 30 isMediaStoreDownload(String docId)31 public static boolean isMediaStoreDownload(String docId) { 32 return docId != null && (docId.startsWith(MEDIASTORE_DOWNLOAD_FILE_PREFIX) 33 || docId.startsWith(MEDIASTORE_DOWNLOAD_DIR_PREFIX)); 34 } 35 getMediaStoreId(String docId)36 public static long getMediaStoreId(String docId) { 37 return Long.parseLong(getMediaStoreIdString(docId)); 38 } 39 40 getMediaStoreIdString(String docId)41 public static String getMediaStoreIdString(String docId) { 42 final int index = docId.indexOf(":"); 43 return docId.substring(index + 1); 44 } 45 isMediaStoreDownloadDir(String docId)46 public static boolean isMediaStoreDownloadDir(String docId) { 47 return docId != null && docId.startsWith(MEDIASTORE_DOWNLOAD_DIR_PREFIX); 48 } 49 50 /** 51 * The returned uri always appends external volume {@link MediaStore#VOLUME_EXTERNAL}. 52 * It doesn't consider the item is located on second volume. It can't be used to update 53 * or insert. 54 * @param docId the doc id 55 * @return external uri for query 56 */ getMediaStoreUriForQuery(String docId)57 public static Uri getMediaStoreUriForQuery(String docId) { 58 return getMediaStoreUri(MediaStore.VOLUME_EXTERNAL, docId); 59 } 60 getMediaStoreUri(String volume, String docId)61 public static Uri getMediaStoreUri(String volume, String docId) { 62 return MediaStore.Downloads.getContentUri(volume, getMediaStoreId(docId)); 63 } 64 } 65