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ImageKnife
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媒体url样例改用photoAccessHelper接口获取本地图片资源 

Signed-off-by: zgf <zenggaofeng2@h-partners.com>
This commit is contained in:
zgf 2024-06-27 09:51:58 +08:00 committed by Madi
parent 3fa2d61b6e
commit e8cd4cf95e
6 changed files with 37 additions and 66 deletions
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2
entry/src/main/ets/entryability/EntryAbility.ets
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@ -33,7 +33,7 @@ export default class EntryAbility extends UIAbility {
async onWindowStageCreate(windowStage: window.WindowStage): Promise<void> {
// Main window is created, set main page for this ability
let list: Array<Permissions> = ['ohos.permission.MEDIA_LOCATION', 'ohos.permission.READ_MEDIA'];
let list: Array<Permissions> = ['ohos.permission.READ_IMAGEVIDEO', 'ohos.permission.WRITE_IMAGEVIDEO'];
let permissionRequestResult: Object;
let atManager = abilityAccessCtrl.createAtManager();
atManager.requestPermissionsFromUser(this.context, list, (err: BusinessError, result: Object) => {

69
entry/src/main/ets/pages/dataShareUriLoadPage.ets
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@ -12,8 +12,9 @@
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import mediaLibrary from '@ohos.multimedia.mediaLibrary';
import { ImageKnifeComponent, ImageKnifeOption } from '@ohos/libraryimageknife'
import { dataSharePredicates } from '@kit.ArkData';
import { photoAccessHelper } from '@kit.MediaLibraryKit';
@Entry
@ -34,56 +35,26 @@ struct DataShareUriLoadPage {
Text("获取媒体图库的uri用ImageKnife展示").fontSize(15)
Flex({ direction: FlexDirection.Row, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
Button("点击加载Uri并展示")
.onClick(() => {
// 获取mediaLibrary实例，后续用到此实例均采用此处获取的实例
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
let imageType = mediaLibrary.MediaType.IMAGE;
// 创建文件获取选项，此处参数为获取image类型的文件资源
let imagesFetchOp:mediaLibrary.MediaFetchOptions = {
selections: mediaLibrary.FileKey.MEDIA_TYPE + '= ?',
selectionArgs: [imageType.toString()],
};
// 获取文件资源，使用callback方式返回异步结果
media.getFileAssets(imagesFetchOp, (error, fetchFileResult) => {
// 判断获取的文件资源的检索结果集是否为undefined，若为undefined则接口调用失败
if (fetchFileResult == undefined) {
console.log('get fetchFileResult failed with error: ' + error);
return;
}
// 获取文件检索结果集中的总数
const count = fetchFileResult.getCount();
// 判断结果集中的数量是否小于0，小于0时表示接口调用失败
if (count < 0) {
console.log('get count from fetchFileResult failed, count: ' + count);
return;
}
// 判断结果集中的数量是否等于0，等于0时表示接口调用成功，但是检索结果集为空，请检查文件获取选项参数配置是否有误和设备中是否存在相应文件
if (count == 0) {
console.log('The count of fetchFileResult is zero');
return;
}
console.log('Get fetchFileResult successfully, count: ' + count);
// 获取文件检索结果集中的第一个资源，使用callback方式返回异步结果
fetchFileResult.getFirstObject((error, fileAsset) => {
// 检查获取的第一个资源是否为undefined，若为undefined则接口调用失败
if (fileAsset == undefined) {
console.log('get first object failed with error: ' + error);
return;
}
console.log("fileAsset id=" + fileAsset.id + " fileAsset uri=" + fileAsset.uri + " fileAsset displayName=" + fileAsset.displayName)
// 加载图库第一张图片的uri
.onClick(async () => {
const context = getContext(this)
let phAccessHelper = photoAccessHelper.getPhotoAccessHelper(context)
let predicates: dataSharePredicates.DataSharePredicates = new dataSharePredicates.DataSharePredicates
let fetchOptions: photoAccessHelper.FetchOptions = {
fetchColumns:[],
predicates:predicates
}
let fetchResult = await phAccessHelper.getAssets(fetchOptions)
if(fetchResult != undefined) {
console.info("fetchResult success")
let photoAsset: photoAccessHelper.PhotoAsset = await fetchResult.getFirstObject()
if(photoAsset != undefined) {
console.info("photoAsset.displayName :"+photoAsset.displayName)
this.imageKnifeOption1 = {
loadSrc: fileAsset.uri,
placeholderSrc: $r('app.media.loading'),
errorholderSrc: $r('app.media.failed')
loadSrc: photoAsset.uri,
placeholderSrc:$r('app.media.loading')
}
// 释放FetchFileResult实例并使其失效。无法调用其他方法
fetchFileResult.close();
});
});
}
}
}).margin({ top: 5, left: 3 })
ImageKnifeComponent({ imageKnifeOption: this.imageKnifeOption1 }).width(300).height(300)
}.width('100%').backgroundColor(Color.Pink)

8
entry/src/main/module.json5
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@ -45,8 +45,8 @@
}
},
{
"name": "ohos.permission.MEDIA_LOCATION",
"reason":"$string:app_permission_MEDIA_LOCATION",
"name": "ohos.permission.WRITE_IMAGEVIDEO",
"reason":"$string:app_permission_WRITE_IMAGEVIDEO",
"usedScene": {
"abilities": [
"EntryAbility"
@ -55,8 +55,8 @@
}
},
{
"name": "ohos.permission.READ_MEDIA",
"reason": "$string:app_permission_MEDIA_LOCATION",
"name": "ohos.permission.READ_IMAGEVIDEO",
"reason": "$string:app_permission_READ_IMAGEVIDEO",
"usedScene": {
"abilities": [
"EntryAbility"

8
entry/src/main/resources/base/element/string.json
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@ -13,12 +13,12 @@
"value": "label"
},
{
"name": "app_permission_MEDIA_LOCATION",
"value": "获取媒体图片"
"name": "app_permission_WRITE_IMAGEVIDEO",
"value": "获取写入媒体资源权限"
},
{
"name": "app_permission_READ_MEDIA",
"value": "读媒体图片"
"name": "app_permission_READ_IMAGEVIDEO",
"value": "获取读媒体资源权限"
}
]
}

8
entry/src/main/resources/en_US/element/string.json
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@ -13,12 +13,12 @@
"value": "label"
},
{
"name": "app_permission_MEDIA_LOCATION",
"value": "获取媒体图片"
"name": "app_permission_WRITE_IMAGEVIDEO",
"value": "获取写入媒体资源权限"
},
{
"name": "app_permission_READ_MEDIA",
"value": "读媒体图片"
"name": "app_permission_READ_IMAGEVIDEO",
"value": "获取读媒体资源权限"
}
]
}

8
entry/src/main/resources/zh_CN/element/string.json
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@ -13,12 +13,12 @@
"value": "label"
},
{
"name": "app_permission_MEDIA_LOCATION",
"value": "获取媒体图片"
"name": "app_permission_WRITE_IMAGEVIDEO",
"value": "获取写入媒体资源权限"
},
{
"name": "app_permission_READ_MEDIA",
"value": "读媒体图片"
"name": "app_permission_READ_IMAGEVIDEO",
"value": "获取读媒体资源权限"
}
]
}