HarmonyOS photoAsset读取photoAccessHelper.PhotoKeys.SIZE失败
当我用phAccessHelper.getAssets读取媒体文件后,再用photoAsset读取媒体信息时失败,报错如下:size is err = 14000014; err message: member not exist,但是我看api介绍里是可以的。代码如下:
async readMedia(){
let predicates: dataSharePredicates.DataSharePredicates = new dataSharePredicates.DataSharePredicates();
// 排序
predicates.orderByDesc(photoAccessHelper.PhotoKeys.DATE_MODIFIED)
let fetchOptions: photoAccessHelper.FetchOptions = {
fetchColumns: [],
predicates: predicates,
};
try {
let fetchResult: photoAccessHelper.FetchResult<photoAccessHelper.PhotoAsset> = await phAccessHelper.getAssets(fetchOptions);
// let photoAsset: photoAccessHelper.PhotoAsset = await fetchResult.getFirstObject();
fetchResult.getAllObjects().then((photoAssets: photoAccessHelper.PhotoAsset[])=>{
photoAssets.forEach((photoAsset: photoAccessHelper.PhotoAsset)=>{
console.info('getAssets photoAsset.uri : ' + photoAsset.uri);
console.info('getAssets displayName = ', photoAsset.displayName);
this.getAssets(photoAsset, photoAccessHelper.PhotoKeys.TITLE)
this.getAssets(photoAsset, photoAccessHelper.PhotoKeys.PHOTO_TYPE)
this.getAssets(photoAsset, photoAccessHelper.PhotoKeys.DISPLAY_NAME)
this.getAssets(photoAsset, photoAccessHelper.PhotoKeys.SIZE)
this.getAssets(photoAsset, photoAccessHelper.PhotoKeys.DURATION)
this.getAssets(photoAsset, photoAccessHelper.PhotoKeys.DATE_ADDED)
this.getAssets(photoAsset, photoAccessHelper.PhotoKeys.DATE_MODIFIED)
this.getAssets(photoAsset, photoAccessHelper.PhotoKeys.DATE_TAKEN)
this.getAssets(photoAsset, photoAccessHelper.PhotoKeys.WIDTH)
this.getAssets(photoAsset, photoAccessHelper.PhotoKeys.HEIGHT)
// 图片
if (photoAsset.photoType === photoAccessHelper.PhotoType.IMAGE){
this.data.push({
itemType: MediaItemType.IMAGE,
urlType: MediaType.LOCAL,
url: photoAsset.uri
})
}else if(photoAsset.photoType === photoAccessHelper.PhotoType.VIDEO){
// 视频
photoAsset.getThumbnail((err, pixelMap) => {
if (err === undefined) {
console.info('getThumbnail successful ' + pixelMap);
this.data.push({
itemType: MediaItemType.VIDEO,
urlType: MediaType.LOCAL,
url: photoAsset.uri,
thumbnailPixMap: pixelMap
})
} else {
console.error(`getThumbnail fail with error: ${err.code}, ${err.message}`);
}
});
}
this.testFetchMetadataFromDataSrc(photoAsset.uri)
})
})
fetchResult.close();
} catch (err) {
console.error('getAssets failed with err: ' + err);
}
}
api介绍如下:
/**
* Returns the value of the specified member.
*
* @param { string } member - Photo asset member. for example : get(PhotoKeys.SIZE)
* @returns { MemberType } Returns the value of the specified photo asset member
* @throws { BusinessError } 401 - if parameter is invalid
* @throws { BusinessError } 13900020 - Invalid argument
* @throws { BusinessError } 14000014 - Member is not a valid PhotoKey
* @syscap SystemCapability.FileManagement.PhotoAccessHelper.Core
* @since 10
*/
get(member: string): MemberType;
HarmonyOS
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getAssets时没有在fetchColumn里面指定key,参考:
地址:
https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-photoaccesshelper-V5