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未验证 提交 8bafffc9 编写于 作者: O openharmony_ci 提交者： Gitee
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!15161 Indent format modified 

Merge pull request !15161 from 胡伟奇/file-management
上级 17e343fa 33f16be7
隐藏空白更改
内联 并排
Showing with 406 addition and 407 deletion
zh-cn/application-dev/file-management/medialibrary-album-guidelines.md
浏览文件 @ 8bafffc9
......@@ -39,19 +39,19 @@ mediaLibrary提供相册相关的接口，供开发者创建、删除相册，
```ts
async function example() {
let mediaType = mediaLibrary.MediaType.IMAGE;
let DIR_IMAGE = mediaLibrary.DirectoryType.DIR_IMAGE;
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
const path = await media.getPublicDirectory(DIR_IMAGE);
//myAlbum为新建文件保存路径，也是新建相册的名称
media.createAsset(mediaType, 'test.jpg', path + 'myAlbum/', (err, fileAsset) => {
if (fileAsset === undefined) {
console.error('createAlbum failed, message = ' + err);
} else {
console.info('createAlbum successfully, message = ' + JSON.stringify(fileAsset));
}
});
let mediaType = mediaLibrary.MediaType.IMAGE;
let DIR_IMAGE = mediaLibrary.DirectoryType.DIR_IMAGE;
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
const path = await media.getPublicDirectory(DIR_IMAGE);
//myAlbum为新建文件保存路径，也是新建相册的名称
media.createAsset(mediaType, 'test.jpg', path + 'myAlbum/', (err, fileAsset) => {
if (fileAsset === undefined) {
console.error('createAlbum failed, message = ' + err);
} else {
console.info('createAlbum successfully, message = ' + JSON.stringify(fileAsset));
}
});
}
```
......@@ -75,20 +75,20 @@ async function example() {
```ts
async function example() {
let AlbumNoArgsfetchOp = {
selections: '',
selectionArgs: [],
};
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
let albumList = await media.getAlbums(AlbumNoArgsfetchOp);
let album = albumList[0];
album.albumName = 'newAlbum';
//回调返回空
album.commitModify().then(() => {
console.info("albumRename successfully");
}).catch((err) => {
console.error("albumRename failed with error: " + err);
});
let AlbumNoArgsfetchOp = {
selections: '',
selectionArgs: [],
};
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
let albumList = await media.getAlbums(AlbumNoArgsfetchOp);
let album = albumList[0];
album.albumName = 'newAlbum';
//回调返回空
album.commitModify().then(() => {
console.info("albumRename successfully");
}).catch((err) => {
console.error("albumRename failed with error: " + err);
});
}
```
zh-cn/application-dev/file-management/medialibrary-filepath-guidelines.md
浏览文件 @ 8bafffc9
......@@ -36,15 +36,15 @@ Openharmony上用户数据统一由媒体库进行管理，用户数据用户数
```ts
async function example(){
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
let DIR_CAMERA = mediaLibrary.DirectoryType.DIR_CAMERA;
const dicResult = await media.getPublicDirectory(DIR_CAMERA);
if (dicResult == 'Camera/') {
console.info('mediaLibraryTest : getPublicDirectory passed');
} else {
console.error('mediaLibraryTest : getPublicDirectory failed');
}
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
let DIR_CAMERA = mediaLibrary.DirectoryType.DIR_CAMERA;
const dicResult = await media.getPublicDirectory(DIR_CAMERA);
if (dicResult == 'Camera/') {
console.info('mediaLibraryTest : getPublicDirectory passed');
} else {
console.error('mediaLibraryTest : getPublicDirectory failed');
}
}
```
......@@ -80,75 +80,75 @@ OpenHarmony提供应用沙箱机制，增加目录可见性数据访问防线，
```ts
async function copyPublic2Sandbox() {
try {
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
let sandboxDirPath = context.filesDir;
let fileKeyObj = mediaLibrary.FileKey;
let fileAssetFetchOp = {
selections: fileKeyObj.DISPLAY_NAME + '= ?',
selectionArgs: ['testFile.txt'],
};
let fetchResult = await media.getFileAssets(fileAssetFetchOp);
let fileAsset = await fetchResult.getFirstObject();
let fdPub = await fileAsset.open('rw');
let fdSand = await fs.open(sandboxDirPath + '/testFile.txt', fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE);
await fs.copyFile(fdPub, fdSand.fd);
await fileAsset.close(fdPub);
await fs.close(fdSand.fd);
let content_sand = await fs.readText(sandboxDirPath + '/testFile.txt');
console.info('content read from sandbox file: ', content_sand)
} catch (err) {
console.info('[demo] copyPublic2Sandbox fail, err: ', err);
}
}
```
**示例2 将应用沙箱路径文件复制到公共路径**
```ts
async function copySandbox2Public() {
try {
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
let sandboxDirPath = context.filesDir;
let fileKeyObj = mediaLibrary.FileKey;
let fileAssetFetchOp = {
selections: fileKeyObj.DISPLAY_NAME + '= ?',
selectionArgs: ['testFile.txt'],
};
let fetchResult = await media.getFileAssets(fileAssetFetchOp);
let fileAsset = await fetchResult.getFirstObject();
let DIR_DOCUMENTS = mediaLibrary.DirectoryType.DIR_DOCUMENTS;
const publicDirPath = await media.getPublicDirectory(DIR_DOCUMENTS);
try {
let fileAsset = await media.createAsset(mediaLibrary.MediaType.FILE, 'testFile02.txt', publicDirPath);
console.info('createFile successfully, message = ' + fileAsset);
} catch (err) {
console.error('createFile failed, message = ' + err);
}
try {
let fileKeyObj = mediaLibrary.FileKey;
let fileAssetFetchOp = {
selections: fileKeyObj.DISPLAY_NAME + '= ?',
selectionArgs: ['testFile02.txt'],
};
let fetchResult = await media.getFileAssets(fileAssetFetchOp);
var fileAsset = await fetchResult.getFirstObject();
} catch (err) {
console.error('file asset get failed, message = ' + err);
}
let fdPub = await fileAsset.open('rw');
let fdSand = await fs.open(sandboxDirPath + 'testFile.txt', OpenMode.READ_WRITE);
await fs.copyFile(fdSand.fd, fdPub);
let fdSand = await fs.open(sandboxDirPath + '/testFile.txt', fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE);
await fs.copyFile(fdPub, fdSand.fd);
await fileAsset.close(fdPub);
await fs.close(fdSand.fd);
let fdPubRead = await fileAsset.open('rw');
try {
let arrayBuffer = new ArrayBuffer(4096);
await fs.read(fdPubRead, arrayBuffer);
var content_pub = String.fromCharCode(...new Uint8Array(arrayBuffer));
fileAsset.close(fdPubRead);
} catch (err) {
console.error('read text failed, message = ', err);
}
console.info('content read from public file: ', content_pub);
let content_sand = await fs.readText(sandboxDirPath + '/testFile.txt');
console.info('content read from sandbox file: ', content_sand)
} catch (err) {
console.info('[demo] copyPublic2Sandbox fail, err: ', err);
}
}
```
**示例2 将应用沙箱路径文件复制到公共路径**
```ts
async function copySandbox2Public() {
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
let sandboxDirPath = context.filesDir;
let DIR_DOCUMENTS = mediaLibrary.DirectoryType.DIR_DOCUMENTS;
const publicDirPath = await media.getPublicDirectory(DIR_DOCUMENTS);
try {
let fileAsset = await media.createAsset(mediaLibrary.MediaType.FILE, 'testFile02.txt', publicDirPath);
console.info('createFile successfully, message = ' + fileAsset);
} catch (err) {
console.error('createFile failed, message = ' + err);
}
try {
let fileKeyObj = mediaLibrary.FileKey;
let fileAssetFetchOp = {
selections: fileKeyObj.DISPLAY_NAME + '= ?',
selectionArgs: ['testFile02.txt'],
};
let fetchResult = await media.getFileAssets(fileAssetFetchOp);
var fileAsset = await fetchResult.getFirstObject();
} catch (err) {
console.error('file asset get failed, message = ' + err);
}
let fdPub = await fileAsset.open('rw');
let fdSand = await fs.open(sandboxDirPath + 'testFile.txt', OpenMode.READ_WRITE);
await fs.copyFile(fdSand.fd, fdPub);
await fileAsset.close(fdPub);
await fs.close(fdSand.fd);
let fdPubRead = await fileAsset.open('rw');
try {
let arrayBuffer = new ArrayBuffer(4096);
await fs.read(fdPubRead, arrayBuffer);
var content_pub = String.fromCharCode(...new Uint8Array(arrayBuffer));
fileAsset.close(fdPubRead);
} catch (err) {
console.error('read text failed, message = ', err);
}
console.info('content read from public file: ', content_pub);
}
```
......@@ -166,20 +166,20 @@ async function copySandbox2Public() {
1. 创建用于读写示例的文件。
```ts
async function example() {
let mediaType = mediaLibrary.MediaType.FILE;
let DIR_DOCUMENTS = mediaLibrary.DirectoryType.DIR_DOCUMENTS;
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
const path = await media.getPublicDirectory(DIR_DOCUMENTS);
media.createAsset(mediaType, "testFile.text", path).then((asset) => {
console.info("createAsset successfully:" + JSON.stringify(asset));
}).catch((err) => {
console.error("createAsset failed with error: " + err);
});
}
```
```ts
async function example() {
let mediaType = mediaLibrary.MediaType.FILE;
let DIR_DOCUMENTS = mediaLibrary.DirectoryType.DIR_DOCUMENTS;
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
const path = await media.getPublicDirectory(DIR_DOCUMENTS);
media.createAsset(mediaType, "testFile.text", path).then((asset) => {
console.info("createAsset successfully:" + JSON.stringify(asset));
}).catch((err) => {
console.error("createAsset failed with error: " + err);
});
}
```
2. 使用open打开文件。
......@@ -195,25 +195,25 @@ async function copySandbox2Public() {
```ts
async function writeOnlyPromise() {
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
let fileKeyObj = mediaLibrary.FileKey;
let fileAssetFetchOp = {
selections: fileKeyObj.DISPLAY_NAME + '= ?',
selectionArgs: ['testFile.txt'],
};
let fetchResult = await media.getFileAssets(fileAssetFetchOp);
let fileAsset = await fetchResult.getFirstObject();
console.info('fileAssetName: ', fileAsset.displayName);
try {
let fd = await fileAsset.open('w');
console.info('file descriptor: ', fd);
await fs.write(fd, "Write file test content.");
await fileAsset.close(fd);
} catch (err) {
console.error('write file failed, message = ', err);
}
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
let fileKeyObj = mediaLibrary.FileKey;
let fileAssetFetchOp = {
selections: fileKeyObj.DISPLAY_NAME + '= ?',
selectionArgs: ['testFile.txt'],
};
let fetchResult = await media.getFileAssets(fileAssetFetchOp);
let fileAsset = await fetchResult.getFirstObject();
console.info('fileAssetName: ', fileAsset.displayName);
try {
let fd = await fileAsset.open('w');
console.info('file descriptor: ', fd);
await fs.write(fd, "Write file test content.");
await fileAsset.close(fd);
} catch (err) {
console.error('write file failed, message = ', err);
}
}
```
......@@ -221,29 +221,29 @@ async function writeOnlyPromise() {
```ts
async function readOnlyPromise() {
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
let fileKeyObj = mediaLibrary.FileKey;
let fileAssetFetchOp = {
selections: fileKeyObj.DISPLAY_NAME + '= ?' ,
selectionArgs: ['testFile.txt'],
};
let fetchResult = await media.getFileAssets(fileAssetFetchOp);
let fileAsset = await fetchResult.getFirstObject();
console.info('fileAssetName: ', fileAsset.displayName);
try {
let fd = await fileAsset.open('r');
let arrayBuffer = new ArrayBuffer(4096);
await fs.read(fd, arrayBuffer);
let fileContent = String.fromCharCode(...new Uint8Array(arrayBuffer));
globalThis.fileContent = fileContent;
globalThis.fileName = fileAsset.displayName;
console.info('file content: ', fileContent);
await fileAsset.close(fd);
} catch (err) {
console.error('read file failed, message = ', err);
}
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
let fileKeyObj = mediaLibrary.FileKey;
let fileAssetFetchOp = {
selections: fileKeyObj.DISPLAY_NAME + '= ?' ,
selectionArgs: ['testFile.txt'],
};
let fetchResult = await media.getFileAssets(fileAssetFetchOp);
let fileAsset = await fetchResult.getFirstObject();
console.info('fileAssetName: ', fileAsset.displayName);
try {
let fd = await fileAsset.open('r');
let arrayBuffer = new ArrayBuffer(4096);
await fs.read(fd, arrayBuffer);
let fileContent = String.fromCharCode(...new Uint8Array(arrayBuffer));
globalThis.fileContent = fileContent;
globalThis.fileName = fileAsset.displayName;
console.info('file content: ', fileContent);
await fileAsset.close(fd);
} catch (err) {
console.error('read file failed, message = ', err);
}
}
```
zh-cn/application-dev/file-management/medialibrary-overview.md
浏览文件 @ 8bafffc9
......@@ -63,65 +63,65 @@ let media = mediaLibrary.getMediaLibrary(context);
1. 在配置文件module.json5中声明权限。在配置文件的“module”标签内，增加“requestPermissions”标签，标签内容请根据实际情况填写。标签说明可参考[访问控制（权限）开发指导](../security/accesstoken-guidelines.md)。
```json
{
"module": {
"requestPermissions": [
{
"name": "ohos.permission.MEDIA_LOCATION",
"reason": "$string:reason",
"usedScene": {
"abilities": [
"EntryAbility"
],
"when": "always"
}
},
{
"name": "ohos.permission.READ_MEDIA",
"reason": "$string:reason",
"usedScene": {
"abilities": [
"EntryAbility"
],
"when": "always"
}
},
{
"name": "ohos.permission.WRITE_MEDIA",
"reason": "$string:reason",
"usedScene": {
"abilities": [
"EntryAbility"
],
"when": "always"
}
}
]
}
}
```
```json
{
"module": {
"requestPermissions": [
{
"name": "ohos.permission.MEDIA_LOCATION",
"reason": "$string:reason",
"usedScene": {
"abilities": [
"EntryAbility"
],
"when": "always"
}
},
{
"name": "ohos.permission.READ_MEDIA",
"reason": "$string:reason",
"usedScene": {
"abilities": [
"EntryAbility"
],
"when": "always"
}
},
{
"name": "ohos.permission.WRITE_MEDIA",
"reason": "$string:reason",
"usedScene": {
"abilities": [
"EntryAbility"
],
"when": "always"
}
}
]
}
}
```
2. 在Ability.ts中onWindowStageCreate里调用requestPermissionsFromUser进行权限校验，可以选择需要动态申请获取的权限自行添加相应代码
```ts
import UIAbility from '@ohos.app.ability.UIAbility';
import abilityAccessCtrl, {Permissions} from '@ohos.abilityAccessCtrl';
export default class EntryAbility extends UIAbility {
onWindowStageCreate(windowStage) {
let list : Array<Permissions> = ['ohos.permission.READ_MEDIA', 'ohos.permission.WRITE_MEDIA'];
let permissionRequestResult;
let atManager = abilityAccessCtrl.createAtManager();
atManager.requestPermissionsFromUser(this.context, list, (err, result) => {
if (err) {
console.error('requestPermissionsFromUserError: ' + JSON.stringify(err));
} else {
permissionRequestResult=result;
console.info('permissionRequestResult: ' + JSON.stringify(permissionRequestResult));
}
});
}
}
```
```ts
import UIAbility from '@ohos.app.ability.UIAbility';
import abilityAccessCtrl, {Permissions} from '@ohos.abilityAccessCtrl';
export default class EntryAbility extends UIAbility {
onWindowStageCreate(windowStage) {
let list : Array<Permissions> = ['ohos.permission.READ_MEDIA', 'ohos.permission.WRITE_MEDIA'];
let permissionRequestResult;
let atManager = abilityAccessCtrl.createAtManager();
atManager.requestPermissionsFromUser(this.context, list, (err, result) => {
if (err) {
console.error('requestPermissionsFromUserError: ' + JSON.stringify(err));
} else {
permissionRequestResult = result;
console.info('permissionRequestResult: ' + JSON.stringify(permissionRequestResult));
}
});
}
}
```
zh-cn/application-dev/file-management/medialibrary-resource-guidelines.md
浏览文件 @ 8bafffc9
......@@ -33,27 +33,27 @@ selectionArgs： MediaType.IMAGE，媒体类型为图片。
```ts
async function example() {
let fileKeyObj = mediaLibrary.FileKey;
let fileType = mediaLibrary.MediaType.IMAGE;
let option = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
selectionArgs: [fileType.toString()],
};
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
const fetchFileResult = await media.getFileAssets(option);
fetchFileResult.getFirstObject().then((fileAsset) => {
console.log('getFirstObject.displayName : ' + fileAsset.displayName);
for (let i = 1; i < fetchFileResult.getCount(); i++) {
fetchFileResult.getNextObject().then((fileAsset) => {
console.info('fileAsset.displayName ' + i + ': ' + fileAsset.displayName);
}).catch((err) => {
console.error('Failed to get next object: ' + err);
});
}
}).catch((err) => {
console.error('Failed to get first object: ' + err);
});
let fileKeyObj = mediaLibrary.FileKey;
let fileType = mediaLibrary.MediaType.IMAGE;
let option = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
selectionArgs: [fileType.toString()],
};
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
const fetchFileResult = await media.getFileAssets(option);
fetchFileResult.getFirstObject().then((fileAsset) => {
console.log('getFirstObject.displayName : ' + fileAsset.displayName);
for (let i = 1; i < fetchFileResult.getCount(); i++) {
fetchFileResult.getNextObject().then((fileAsset) => {
console.info('fileAsset.displayName ' + i + ': ' + fileAsset.displayName);
}).catch((err) => {
console.error('Failed to get next object: ' + err);
});
}
}).catch((err) => {
console.error('Failed to get first object: ' + err);
});
}
```
......@@ -67,26 +67,26 @@ selectionArgs：2022-8-5，具体添加时间的字符串。
```ts
async function example() {
let fileKeyObj = mediaLibrary.FileKey;
let option = {
let fileKeyObj = mediaLibrary.FileKey;
let option = {
selections: fileKeyObj.DATE_ADDED + '> ?',
selectionArgs: ['2022-8-5'],
};
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
const fetchFileResult = await media.getFileAssets(option);
fetchFileResult.getFirstObject().then((fileAsset) => {
console.info('getFirstObject.displayName : ' + fileAsset.displayName);
for (let i = 1; i < fetchFileResult.getCount(); i++) {
fetchFileResult.getNextObject().then((fileAsset) => {
console.info('fileAsset.displayName ' + i + ': ' + fileAsset.displayName);
}).catch((err) => {
console.error('Failed to get next object: ' + err);
});
}
}).catch((err) => {
console.error('Failed to get first object: ' + err);
});
};
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
const fetchFileResult = await media.getFileAssets(option);
fetchFileResult.getFirstObject().then((fileAsset) => {
console.info('getFirstObject.displayName : ' + fileAsset.displayName);
for (let i = 1; i < fetchFileResult.getCount(); i++) {
fetchFileResult.getNextObject().then((fileAsset) => {
console.info('fileAsset.displayName ' + i + ': ' + fileAsset.displayName);
}).catch((err) => {
console.error('Failed to get next object: ' + err);
});
}
}).catch((err) => {
console.error('Failed to get first object: ' + err);
});
}
```
......@@ -98,28 +98,28 @@ order： FileKey.DATE_ADDED，根据文件添加日期排序；并设置排列
```ts
async function example() {
let fileKeyObj = mediaLibrary.FileKey;
let fileType = mediaLibrary.MediaType.IMAGE;
let option = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
selectionArgs: [fileType.toString()],
order: fileKeyObj.DATE_ADDED + " DESC",
};
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
const fetchFileResult = await media.getFileAssets(option);
fetchFileResult.getFirstObject().then((fileAsset) => {
console.info('getFirstObject.displayName : ' + fileAsset.displayName);
for (let i = 1; i < fetchFileResult.getCount(); i++) {
fetchFileResult.getNextObject().then((fileAsset) => {
console.info('fileAsset.displayName ' + i + ': ' + fileAsset.displayName);
}).catch((err) => {
console.error('Failed to get next object: ' + err);
});
}
}).catch((err) => {
console.error('Failed to get first object: ' + err);
});
let fileKeyObj = mediaLibrary.FileKey;
let fileType = mediaLibrary.MediaType.IMAGE;
let option = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
selectionArgs: [fileType.toString()],
order: fileKeyObj.DATE_ADDED + " DESC",
};
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
const fetchFileResult = await media.getFileAssets(option);
fetchFileResult.getFirstObject().then((fileAsset) => {
console.info('getFirstObject.displayName : ' + fileAsset.displayName);
for (let i = 1; i < fetchFileResult.getCount(); i++) {
fetchFileResult.getNextObject().then((fileAsset) => {
console.info('fileAsset.displayName ' + i + ': ' + fileAsset.displayName);
}).catch((err) => {
console.error('Failed to get next object: ' + err);
});
}
}).catch((err) => {
console.error('Failed to get first object: ' + err);
});
}
```
......@@ -133,24 +133,23 @@ selectionArgs：'myAlbum'，具体相册名称。
```ts
async function example() {
let fileKeyObj = mediaLibrary.FileKey;
let fileType = mediaLibrary.MediaType.IMAGE;
let option = {
selections: fileKeyObj.ALBUM_NAME + '= ?',
selectionArgs: ['myAlbum'],
};
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
const fetchFileResult = await media.getFileAssets(option);
if (albumList.length > 0) {
fetchFileResult.getFirstObject().then((album) => {
console.info('getFirstObject.displayName : ' + album.albumName);
}).catch((err) => {
console.error('Failed to get first object: ' + err);
});
} else {
console.info('getAlbum list is: 0');
}
let fileKeyObj = mediaLibrary.FileKey;
let option = {
selections: fileKeyObj.ALBUM_NAME + '= ?',
selectionArgs: ['myAlbum'],
};
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
const fetchFileResult = await media.getFileAssets(option);
if (albumList.length > 0) {
fetchFileResult.getFirstObject().then((album) => {
console.info('getFirstObject.displayName : ' + album.albumName);
}).catch((err) => {
console.error('Failed to get first object: ' + err);
});
} else {
console.info('getAlbum list is: 0');
}
}
```
......@@ -169,24 +168,24 @@ async function example() {
1. 建立检索条件，用于获取目的相册实例。
```ts
let fileKeyObj = mediaLibrary.FileKey;
let AlbumNoArgsFetchOp = {
selections: fileKeyObj.ALBUM_NAME + '= ?',
selectionArgs: ['新建相册1']
}
```
```ts
let fileKeyObj = mediaLibrary.FileKey;
let AlbumNoArgsFetchOp = {
selections: fileKeyObj.ALBUM_NAME + '= ?',
selectionArgs: ['新建相册1']
}
```
2. 建立检索条件，用于获取目的相册下的视频资源。
```ts
let fileKeyObj = mediaLibrary.FileKey;
let videoType = mediaLibrary.MediaType.VIDEO;
let videoFetchOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
selectionArgs: [videoType.toString()],
}
```
```ts
let fileKeyObj = mediaLibrary.FileKey;
let videoType = mediaLibrary.MediaType.VIDEO;
let videoFetchOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
selectionArgs: [videoType.toString()],
}
```
3. 通过Album.getFileAssets获取对应的资源。
......@@ -194,28 +193,28 @@ async function example() {
```ts
async function getCameraImagePromise() {
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
let fileKeyObj = mediaLibrary.FileKey;
let videoType = mediaLibrary.MediaType.VIDEO;
let videoFetchOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
selectionArgs: [videoType.toString()],
}
let AlbumNoArgsFetchOp = {
selections: fileKeyObj.ALBUM_NAME + '= ?',
selectionArgs: ['新建相册1']
}
let albumList = await media.getAlbums(AlbumNoArgsFetchOp);
if (albumList.length > 0) {
const album = albumList[0];
let fetchFileResult = await album.getFileAssets(videoFetchOp);
let count = fetchFileResult.getCount();
console.info("get mediaLibrary VIDEO number", count);
} else {
console.info('getAlbum list is: 0');
}
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
let fileKeyObj = mediaLibrary.FileKey;
let videoType = mediaLibrary.MediaType.VIDEO;
let videoFetchOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
selectionArgs: [videoType.toString()],
}
let AlbumNoArgsFetchOp = {
selections: fileKeyObj.ALBUM_NAME + '= ?',
selectionArgs: ['新建相册1']
}
let albumList = await media.getAlbums(AlbumNoArgsFetchOp);
if (albumList.length > 0) {
const album = albumList[0];
let fetchFileResult = await album.getFileAssets(videoFetchOp);
let count = fetchFileResult.getCount();
console.info("get mediaLibrary VIDEO number", count);
} else {
console.info('getAlbum list is: 0');
}
}
```
......@@ -243,32 +242,32 @@ async function getCameraImagePromise() {
```ts
async function getFirstThumbnailPromise() {
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
let fileKeyObj = mediaLibrary.FileKey;
let imageType = mediaLibrary.MediaType.IMAGE;
let imagesFetchOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
selectionArgs: [imageType.toString()],
}
let size = { width: 720, height: 720 };
const fetchFileResult = await media.getFileAssets(imagesFetchOp);
if (fetchFileResult === undefined) {
console.error("get image failed with error");
return;
} else {
const asset = await fetchFileResult.getFirstObject();
asset.getThumbnail(size).then((pixelMap) => {
pixelMap.getImageInfo().then((info) => {
console.info('get Thumbnail info: ' + "width: " + info.size.width + " height: " + info.size.height);
}).catch((err) => {
console.error("getImageInfo failed with error: " + err);
});
}).catch((err) => {
console.error("getImageInfo failed with error: " + err);
});
}
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
let fileKeyObj = mediaLibrary.FileKey;
let imageType = mediaLibrary.MediaType.IMAGE;
let imagesFetchOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
selectionArgs: [imageType.toString()],
}
let size = { width: 720, height: 720 };
const fetchFileResult = await media.getFileAssets(imagesFetchOp);
if (fetchFileResult === undefined) {
console.error("get image failed with error");
return;
} else {
const asset = await fetchFileResult.getFirstObject();
asset.getThumbnail(size).then((pixelMap) => {
pixelMap.getImageInfo().then((info) => {
console.info('get Thumbnail info: ' + "width: " + info.size.width + " height: " + info.size.height);
}).catch((err) => {
console.error("getImageInfo failed with error: " + err);
});
}).catch((err) => {
console.error("getImageInfo failed with error: " + err);
});
}
}
```
......@@ -286,16 +285,16 @@ async function getFirstThumbnailPromise() {
```ts
async function example() {
let mediaType = mediaLibrary.MediaType.FILE;
let DIR_DOCUMENTS = mediaLibrary.DirectoryType.DIR_DOCUMENTS;
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
const path = await media.getPublicDirectory(DIR_DOCUMENTS);
media.createAsset(mediaType, "testFile.text", path).then((asset) => {
console.info("createAsset successfully:"+ JSON.stringify(asset));
}).catch((err) => {
console.error("createAsset failed with error: " + err);
});
let mediaType = mediaLibrary.MediaType.FILE;
let DIR_DOCUMENTS = mediaLibrary.DirectoryType.DIR_DOCUMENTS;
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
const path = await media.getPublicDirectory(DIR_DOCUMENTS);
media.createAsset(mediaType, "testFile.text", path).then((asset) => {
console.info("createAsset successfully:"+ JSON.stringify(asset));
}).catch((err) => {
console.error("createAsset failed with error: " + err);
});
}
```
......@@ -321,26 +320,26 @@ async function example() {
```ts
async function example() {
let fileKeyObj = mediaLibrary.FileKey;
let fileType = mediaLibrary.MediaType.FILE;
let option = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
selectionArgs: [fileType.toString()],
};
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
const fetchFileResult = await media.getFileAssets(option);
let asset = await fetchFileResult.getFirstObject();
if (asset === undefined) {
console.error('asset not exist');
return;
}
//回调为空
asset.trash(true).then(() => {
console.info("trash successfully");
}).catch((err) => {
console.error("trash failed with error: " + err);
});
let fileKeyObj = mediaLibrary.FileKey;
let fileType = mediaLibrary.MediaType.FILE;
let option = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
selectionArgs: [fileType.toString()],
};
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
const fetchFileResult = await media.getFileAssets(option);
let asset = await fetchFileResult.getFirstObject();
if (asset === undefined) {
console.error('asset not exist');
return;
}
//回调为空
asset.trash(true).then(() => {
console.info("trash successfully");
}).catch((err) => {
console.error("trash failed with error: " + err);
});
}
```
......@@ -369,28 +368,28 @@ async function example() {
```ts
async function example() {
let fileKeyObj = mediaLibrary.FileKey;
let fileType = mediaLibrary.MediaType.IMAGE;
let option = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
selectionArgs: [fileType.toString()],
};
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
const fetchFileResult = await media.getFileAssets(option);
let asset = await fetchFileResult.getFirstObject();
if (asset === undefined) {
console.error('asset not exist');
return;
let fileKeyObj = mediaLibrary.FileKey;
let fileType = mediaLibrary.MediaType.IMAGE;
let option = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
selectionArgs: [fileType.toString()],
};
const context = getContext(this);
let media = mediaLibrary.getMediaLibrary(context);
const fetchFileResult = await media.getFileAssets(option);
let asset = await fetchFileResult.getFirstObject();
if (asset === undefined) {
console.error('asset not exist');
return;
}
asset.displayName = 'newImage.jpg';
//回调为空
asset.commitModify((err) => {
if (err) {
console.error('fileRename Failed ');
return;
}
asset.displayName = 'newImage.jpg';
//回调为空
asset.commitModify((err) => {
if (err) {
console.error('fileRename Failed ');
return;
}
console.info('fileRename successful.');
});
console.info('fileRename successful.');
});
}
```
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