1 /* 2 * Copyright (C) 2010 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 17 package com.android.gallery3d.data; 18 19 import android.content.ContentResolver; 20 import android.net.Uri; 21 import android.webkit.MimeTypeMap; 22 23 import com.android.gallery3d.app.GalleryApp; 24 25 import java.net.URLDecoder; 26 import java.net.URLEncoder; 27 28 class UriSource extends MediaSource { 29 @SuppressWarnings("unused") 30 private static final String TAG = "UriSource"; 31 private static final String IMAGE_TYPE_PREFIX = "image/"; 32 private static final String IMAGE_TYPE_ANY = "image/*"; 33 34 private GalleryApp mApplication; 35 UriSource(GalleryApp context)36 public UriSource(GalleryApp context) { 37 super("uri"); 38 mApplication = context; 39 } 40 41 @Override createMediaObject(Path path)42 public MediaObject createMediaObject(Path path) { 43 String segment[] = path.split(); 44 if (segment.length != 3) { 45 throw new RuntimeException("bad path: " + path); 46 } 47 String uri = URLDecoder.decode(segment[1]); 48 String type = URLDecoder.decode(segment[2]); 49 return new UriImage(mApplication, path, Uri.parse(uri), type); 50 } 51 getMimeType(Uri uri)52 private String getMimeType(Uri uri) { 53 if (ContentResolver.SCHEME_FILE.equals(uri.getScheme())) { 54 String extension = 55 MimeTypeMap.getFileExtensionFromUrl(uri.toString()); 56 String type = MimeTypeMap.getSingleton() 57 .getMimeTypeFromExtension(extension.toLowerCase()); 58 if (type != null) return type; 59 } 60 // Assume the type is image if the type cannot be resolved 61 // This could happen for "http" URI. 62 String type = mApplication.getContentResolver().getType(uri); 63 if (type == null) type = "image/*"; 64 return type; 65 } 66 67 @Override findPathByUri(Uri uri, String type)68 public Path findPathByUri(Uri uri, String type) { 69 String mimeType = getMimeType(uri); 70 71 // Try to find a most specific type but it has to be started with "image/" 72 if ((type == null) || (IMAGE_TYPE_ANY.equals(type) 73 && mimeType.startsWith(IMAGE_TYPE_PREFIX))) { 74 type = mimeType; 75 } 76 77 if (type.startsWith(IMAGE_TYPE_PREFIX)) { 78 return Path.fromString("/uri/" + URLEncoder.encode(uri.toString()) 79 + "/" +URLEncoder.encode(type)); 80 } 81 // We have no clues that it is an image 82 return null; 83 } 84 } 85