1 /* 2 * Copyright (C) 2009 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.camera.gallery; 18 19 import android.content.ContentResolver; 20 import android.database.Cursor; 21 import android.net.Uri; 22 import android.provider.MediaStore.Images.Media; 23 24 import java.util.HashMap; 25 26 /** 27 * Represents an ordered collection of Image objects. Provides an API to add 28 * and remove an image. 29 */ 30 public class ImageList extends BaseImageList implements IImageList { 31 32 @SuppressWarnings("unused") 33 private static final String TAG = "ImageList"; 34 35 private static final String[] ACCEPTABLE_IMAGE_TYPES = 36 new String[] { "image/jpeg", "image/png", "image/gif" }; 37 getBucketIds()38 public HashMap<String, String> getBucketIds() { 39 Uri uri = mBaseUri.buildUpon() 40 .appendQueryParameter("distinct", "true").build(); 41 Cursor cursor = Media.query( 42 mContentResolver, uri, 43 new String[] { 44 Media.BUCKET_DISPLAY_NAME, 45 Media.BUCKET_ID}, 46 whereClause(), whereClauseArgs(), null); 47 try { 48 HashMap<String, String> hash = new HashMap<String, String>(); 49 while (cursor.moveToNext()) { 50 hash.put(cursor.getString(1), cursor.getString(0)); 51 } 52 return hash; 53 } finally { 54 cursor.close(); 55 } 56 } 57 58 /** 59 * ImageList constructor. 60 */ ImageList(ContentResolver resolver, Uri imageUri, int sort, String bucketId)61 public ImageList(ContentResolver resolver, Uri imageUri, 62 int sort, String bucketId) { 63 super(resolver, imageUri, sort, bucketId); 64 } 65 66 private static final String WHERE_CLAUSE = 67 "(" + Media.MIME_TYPE + " in (?, ?, ?))"; 68 private static final String WHERE_CLAUSE_WITH_BUCKET_ID = 69 WHERE_CLAUSE + " AND " + Media.BUCKET_ID + " = ?"; 70 whereClause()71 protected String whereClause() { 72 return mBucketId == null ? WHERE_CLAUSE : WHERE_CLAUSE_WITH_BUCKET_ID; 73 } 74 whereClauseArgs()75 protected String[] whereClauseArgs() { 76 // TODO: Since mBucketId won't change, we should keep the array. 77 if (mBucketId != null) { 78 int count = ACCEPTABLE_IMAGE_TYPES.length; 79 String[] result = new String[count + 1]; 80 System.arraycopy(ACCEPTABLE_IMAGE_TYPES, 0, result, 0, count); 81 result[count] = mBucketId; 82 return result; 83 } 84 return ACCEPTABLE_IMAGE_TYPES; 85 } 86 87 @Override createCursor()88 protected Cursor createCursor() { 89 Cursor c = Media.query( 90 mContentResolver, mBaseUri, IMAGE_PROJECTION, 91 whereClause(), whereClauseArgs(), sortOrder()); 92 return c; 93 } 94 95 static final String[] IMAGE_PROJECTION = new String[] { 96 Media._ID, 97 Media.DATA, 98 Media.DATE_TAKEN, 99 Media.MINI_THUMB_MAGIC, 100 Media.ORIENTATION, 101 Media.TITLE, 102 Media.MIME_TYPE, 103 Media.DATE_MODIFIED}; 104 105 private static final int INDEX_ID = 0; 106 private static final int INDEX_DATA_PATH = 1; 107 private static final int INDEX_DATE_TAKEN = 2; 108 private static final int INDEX_MINI_THUMB_MAGIC = 3; 109 private static final int INDEX_ORIENTATION = 4; 110 private static final int INDEX_TITLE = 5; 111 private static final int INDEX_MIME_TYPE = 6; 112 private static final int INDEX_DATE_MODIFIED = 7; 113 114 @Override getImageId(Cursor cursor)115 protected long getImageId(Cursor cursor) { 116 return cursor.getLong(INDEX_ID); 117 } 118 119 @Override loadImageFromCursor(Cursor cursor)120 protected BaseImage loadImageFromCursor(Cursor cursor) { 121 long id = cursor.getLong(INDEX_ID); 122 String dataPath = cursor.getString(INDEX_DATA_PATH); 123 long dateTaken = cursor.getLong(INDEX_DATE_TAKEN); 124 if (dateTaken == 0) { 125 dateTaken = cursor.getLong(INDEX_DATE_MODIFIED) * 1000; 126 } 127 long miniThumbMagic = cursor.getLong(INDEX_MINI_THUMB_MAGIC); 128 int orientation = cursor.getInt(INDEX_ORIENTATION); 129 String title = cursor.getString(INDEX_TITLE); 130 String mimeType = cursor.getString(INDEX_MIME_TYPE); 131 if (title == null || title.length() == 0) { 132 title = dataPath; 133 } 134 return new Image(this, mContentResolver, id, cursor.getPosition(), 135 contentUri(id), dataPath, mimeType, dateTaken, title, 136 orientation); 137 } 138 } 139