1/* 2 * Copyright (c) 2023 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16import mediaLibrary from '@ohos.multimedia.mediaLibrary' 17 18import { Log } from '../utils/Log' 19 20export default class ThumbnailGetter { 21 private TAG = '[ThumbnailGetter]:' 22 23 public async getThumbnailInfo(width: number, height: number, uri?: string): Promise<PixelMap | undefined> { 24 Log.log(`${this.TAG} getThumbnailInfo E`) 25 Log.debug(`${this.TAG} getThumbnailInfo width: ${width}, height: ${height}, uri: ${JSON.stringify(uri)}`) 26 const fileKeyObj = mediaLibrary.FileKey; 27 let fetchOp: any 28 const media = mediaLibrary.getMediaLibrary(globalThis.cameraAbilityContext); 29 let publicPath: string = await media.getPublicDirectory(mediaLibrary.DirectoryType.DIR_CAMERA) 30 Log.log(`${this.TAG} getThumbnailInfo media: ${media}`) 31 fetchOp = { 32 selections: `${fileKeyObj.RELATIVE_PATH}=?`, 33 selectionArgs: [publicPath], 34 order: `${fileKeyObj.DATE_ADDED} DESC LIMIT 0, 1` 35 } 36 37 Log.log(`${this.TAG} getThumbnailInfo fetchOp: ${JSON.stringify(fetchOp)}`) 38 const fetchFileResult = await media.getFileAssets(fetchOp); 39 const count = fetchFileResult.getCount() 40 Log.log(`${this.TAG} getThumbnailInfo fetchFileResult.getCount: ${count}`) 41 if (count == 0) { 42 return undefined 43 } 44 const lastFileAsset = await fetchFileResult.getLastObject() 45 await fetchFileResult.close() 46 if (lastFileAsset == null) { 47 Log.error(`${this.TAG} getThumbnailInfo lastFileAsset is null`) 48 return undefined 49 } 50 const thumbnailPixelMap = lastFileAsset.getThumbnail({width: 40, height: 40}) 51 Log.info(`${this.TAG} getThumbnailInfo thumbnailPixelMap: ${JSON.stringify(thumbnailPixelMap)} X`) 52 return thumbnailPixelMap 53 } 54} 55