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提交 8cdcfecc 编写于 作者: Z zhang-daiyue
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modify js-apis-medialibrary.md 

Signed-off-by: Nzhang-daiyue <zhangdaiyue1@huawei.com>
Change-Id: I52b0a0485c9a24a316697ad7853d5c3a77a103d4
上级 9841c710
隐藏空白更改
内联 并排
Showing with 90 addition and 34 deletion
zh-cn/application-dev/reference/apis/js-apis-medialibrary.md
浏览文件 @ 8cdcfecc
......@@ -98,7 +98,9 @@ media.getFileAssets(imagesfetchOp, (error, fetchFileResult) => {
console.info('mediaLibraryTest : ASSET_CALLBACK fetchFileResult success');
fetchFileResult.getAllObject((err, fileAssetList) => {
if (fileAssetList != undefined) {
fileAssetList.forEach(getAllObjectInfo);
fileAssetList.forEach(function(getAllObjectInfo){
console.info("getAllObjectInfo.displayName :" + getAllObjectInfo.displayName);
});
}
});
}
......@@ -160,7 +162,7 @@ on(type: 'deviceChange'|'albumChange'|'imageChange'|'audioChange'|'videoChange'|
**示例：**
```
mediaLibrary.on('imageChange', () => {
media.on('imageChange', () => {
// image file had changed, do something
})
```
......@@ -665,7 +667,7 @@ startMediaSelect(option: MediaSelectOption, callback: AsyncCallback&lt;Array&lt;
```
let option = {
type : "image",
type : "media",
count : 2
};
mediaLibrary.getMediaLibrary().startMediaSelect(option, (err, value) => {
......@@ -705,7 +707,7 @@ startMediaSelect(option: MediaSelectOption): Promise&lt;Array&lt;string&gt;&gt;
```
let option = {
type : "image",
type : "media",
count : 2
};
mediaLibrary.getMediaLibrary().startMediaSelect(option).then((value) => {
......@@ -770,6 +772,7 @@ isDirectory(callback: AsyncCallback&lt;boolean&gt;): void
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -805,6 +808,7 @@ isDirectory():Promise&lt;boolean&gt;
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -842,6 +846,7 @@ commitModify(callback: AsyncCallback&lt;void&gt;): void
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -878,6 +883,7 @@ commitModify(): Promise&lt;void&gt;
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -918,7 +924,7 @@ async function example() {
let mediaType = mediaLibrary.MediaType.IMAGE;
let DIR_IMAGE = mediaLibrary.DirectoryType.DIR_IMAGE;
const path = await media.getPublicDirectory(DIR_IMAGE);
asset = await media.createAsset(mediaType, "image00003.jpg", path);
const asset = await media.createAsset(mediaType, "image00003.jpg", path);
asset.open('rw', (openError, fd) => {
if(fd > 0){
asset.close(fd);
......@@ -960,7 +966,7 @@ async function example() {
let mediaType = mediaLibrary.MediaType.IMAGE;
let DIR_IMAGE = mediaLibrary.DirectoryType.DIR_IMAGE;
const path = await media.getPublicDirectory(DIR_IMAGE);
asset = await media.createAsset(mediaType, "image00003.jpg", path);
const asset = await media.createAsset(mediaType, "image00003.jpg", path);
asset.open('rw')
.then((fd) => {
console.info('File fd!' + fd);
......@@ -992,6 +998,7 @@ close(fd: number, callback: AsyncCallback&lt;void&gt;): void
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -1001,13 +1008,19 @@ async function example() {
};
const fetchFileResult = await media.getFileAssets(getImageOp);
const asset = await fetchFileResult.getFirstObject();
asset.close(fd, (closeErr) => {
if (closeErr != undefined) {
console.info('mediaLibraryTest : close : FAIL ' + closeErr.message);
console.info('mediaLibraryTest : ASSET_CALLBACK : FAIL');
} else {
console.info("=======asset.close success====>");
}
asset.open('rw').then((fd) => {
console.info('File fd!' + fd);
asset.close(fd, (closeErr) => {
if (closeErr != undefined) {
console.info('mediaLibraryTest : close : FAIL ' + closeErr.message);
console.info('mediaLibraryTest : ASSET_CALLBACK : FAIL');
} else {
console.info("=======asset.close success====>");
}
});
})
.catch((err) => {
console.info('File err!' + err);
});
}
```
......@@ -1038,6 +1051,7 @@ close(fd: number): Promise&lt;void&gt;
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -1047,14 +1061,20 @@ async function example() {
};
const fetchFileResult = await media.getFileAssets(getImageOp);
const asset = await fetchFileResult.getFirstObject();
asset.close(fd).then((closeErr) => {
if (closeErr != undefined) {
console.info('mediaLibraryTest : close : FAIL ' + closeErr.message);
console.info('mediaLibraryTest : ASSET_CALLBACK : FAIL');
asset.open('rw').then((fd) => {
console.info('File fd!' + fd);
asset.close(fd).then((closeErr) => {
if (closeErr != undefined) {
console.info('mediaLibraryTest : close : FAIL ' + closeErr.message);
console.info('mediaLibraryTest : ASSET_CALLBACK : FAIL');
} else {
console.info("=======asset.close success====>");
}
} else {
console.info("=======asset.close success====>");
}
});
})
.catch((err) => {
console.info('File err!' + err);
});
}
```
......@@ -1079,6 +1099,7 @@ getThumbnail(callback: AsyncCallback&lt;image.PixelMap&gt;): void
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -1115,6 +1136,7 @@ getThumbnail(size: Size, callback: AsyncCallback&lt;image.PixelMap&gt;): void
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -1122,6 +1144,7 @@ async function example() {
order: fileKeyObj.DATE_ADDED + " DESC",
extendArgs: "",
};
let size = { width: 720, height: 720 };
const fetchFileResult = await media.getFileAssets(getImageOp);
const asset = await fetchFileResult.getFirstObject();
asset.getThumbnail(size, (err, pixelmap) => {
......@@ -1156,6 +1179,7 @@ getThumbnail(size?: Size): Promise&lt;image.PixelMap&gt;
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -1163,6 +1187,7 @@ async function example() {
order: fileKeyObj.DATE_ADDED + " DESC",
extendArgs: "",
};
let size = { width: 720, height: 720 };
const fetchFileResult = await media.getFileAssets(getImageOp);
const asset = await fetchFileResult.getFirstObject();
asset.getThumbnail(size)
......@@ -1196,6 +1221,7 @@ favorite(isFavorite: boolean, callback: AsyncCallback&lt;void&gt;): void
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -1237,6 +1263,7 @@ favorite(isFavorite: boolean): Promise&lt;void&gt;
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -1274,6 +1301,7 @@ isFavorite(callback: AsyncCallback&lt;boolean&gt;): void
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -1313,6 +1341,7 @@ isFavorite():Promise&lt;boolean&gt;
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -1353,6 +1382,7 @@ trash(isTrash: boolean, callback: AsyncCallback&lt;void&gt;): void
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -1397,6 +1427,7 @@ trash(isTrash: boolean): Promise&lt;void&gt;
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -1434,6 +1465,7 @@ isTrash(callback: AsyncCallback&lt;boolean&gt;): void
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -1447,7 +1479,7 @@ async function example() {
function isTrashCallBack(err, isTrash) {
if (isTrash == true) {
console.info('mediaLibraryTest : ASSET_CALLBACK ASSET_CALLBACK isTrash = ' + isTrash);
asset.trash(true, trashCallBack);
asset.trash(true, istrashCallBack);
} else {
console.info('mediaLibraryTest : ASSET_CALLBACK isTrash Unsuccessfull = ' + err);
......@@ -1478,6 +1510,7 @@ isTrash():Promise&lt;boolean&gt;
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -1517,6 +1550,8 @@ getCount(): number
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let fileType = mediaLibrary.MediaType.FILE;
let getFileCountOneOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
selectionArgs: [fileType.toString()],
......@@ -1546,6 +1581,7 @@ isAfterLast(): boolean
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -1583,6 +1619,7 @@ close(): void
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -1613,6 +1650,7 @@ getFirstObject(callback: AsyncCallback&lt;FileAsset&gt;): void
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -1621,12 +1659,12 @@ async function example() {
extendArgs: "",
};
let fetchFileResult = await media.getFileAssets(getImageOp);
fetchFileResult.getFirstObject((err, value) => {
fetchFileResult.getFirstObject((err, fileAsset) => {
if (err) {
console.error('Failed ');
return;
}
console.log(value);
console.log('fileAsset.displayName : ' + fileAsset.displayName);
})
}
```
......@@ -1649,6 +1687,7 @@ getFirstObject(): Promise&lt;FileAsset&gt;
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -1683,6 +1722,7 @@ async function example() {
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -1691,12 +1731,12 @@ async function example() {
extendArgs: "",
};
let fetchFileResult = await media.getFileAssets(getImageOp);
fetchFileResult.getNextObject((err, value) => {
fetchFileResult.getNextObject((err, fileAsset) => {
if (err) {
console.error('Failed ');
return;
}
console.log(value);
console.log('fileAsset.displayName : ' + fileAsset.displayName);
})
}
```
......@@ -1719,6 +1759,7 @@ async function example() {
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -1729,7 +1770,7 @@ async function example() {
let fetchFileResult = await media.getFileAssets(getImageOp);
const fetchCount = fetchFileResult.getCount();
console.info('mediaLibraryTest : count:' + fetchCount);
fileAsset = await fetchFileResult.getNextObject();
let fileAsset = await fetchFileResult.getNextObject();
}
```
......@@ -1751,6 +1792,7 @@ getLastObject(callback: AsyncCallback&lt;FileAsset&gt;): void
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -1759,12 +1801,12 @@ async function example() {
extendArgs: "",
};
let fetchFileResult = await media.getFileAssets(getImageOp);
fetchFileResult.getLastObject((err, value) => {
fetchFileResult.getLastObject((err, fileAsset) => {
if (err) {
console.error('Failed ');
return;
}
console.log(value);
console.log('fileAsset.displayName : ' + fileAsset.displayName);
})
}
```
......@@ -1787,6 +1829,7 @@ getLastObject(): Promise&lt;FileAsset&gt;
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -1818,6 +1861,7 @@ getPositionObject(index: number, callback: AsyncCallback&lt;FileAsset&gt;): void
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -1826,12 +1870,12 @@ async function example() {
extendArgs: "",
};
let fetchFileResult = await media.getFileAssets(getImageOp);
fetchFileResult.getPositionObject(0, (err, value) => {
fetchFileResult.getPositionObject(0, (err, fileAsset) => {
if (err) {
console.error('Failed ');
return;
}
console.log(value);
console.log('fileAsset.displayName : ' + fileAsset.displayName);
})
}
```
......@@ -1860,6 +1904,7 @@ getPositionObject(index: number): Promise&lt;FileAsset&gt;
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -1868,12 +1913,12 @@ async function example() {
extendArgs: "",
};
let fetchFileResult = await media.getFileAssets(getImageOp);
fetchFileResult.getPositionObject(1, (err, value) => {
fetchFileResult.getPositionObject(1, (err, fileAsset) => {
if (err) {
console.error('Failed ');
return;
}
console.log(value);
console.log('fileAsset.displayName : ' + fileAsset.displayName);
})
}
```
......@@ -1896,6 +1941,7 @@ getAllObject(callback: AsyncCallback&lt;Array&lt;FileAsset&gt;&gt;): void
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -1904,12 +1950,12 @@ async function example() {
extendArgs: "",
};
let fetchFileResult = await media.getFileAssets(getImageOp);
fetchFileResult.getAllObject((err, value) => {
fetchFileResult.getAllObject((err, fileAsset) => {
if (err) {
console.error('Failed ');
return;
}
console.log(value);
console.log('fileAsset.displayName : ' + fileAsset.displayName);
})
}
```
......@@ -1932,6 +1978,7 @@ getAllObject(): Promise&lt;Array&lt;FileAsset&gt;&gt;
```
async function example() {
let fileKeyObj = mediaLibrary.FileKey
let imageType = mediaLibrary.MediaType.IMAGE;
let getImageOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
......@@ -2059,6 +2106,10 @@ async function example() {
selections: '',
selectionArgs: [],
};
let fileNoArgsfetchOp = {
selections: '',
selectionArgs: [],
}
const albumList = await media.getAlbums(AlbumNoArgsfetchOp);
const album = albumList[0];
album.getFileAssets(fileNoArgsfetchOp, getFileAssetsCallBack);
......@@ -2098,6 +2149,10 @@ async function example() {
selections: '',
selectionArgs: [],
};
let fileNoArgsfetchOp = {
selections: '',
selectionArgs: [],
}
const albumList = await media.getAlbums(AlbumNoArgsfetchOp);
const album = albumList[0];
album.getFileAssets(fileNoArgsfetchOp).then(function(albumFetchFileResult){
......@@ -2249,3 +2304,4 @@ async function example() {
| ----- | ------ | ---- | -------------------- |
| type | string | 是 | 媒体类型，包括：image, video, media，当前仅支持media类型 |
| count | number | 是 | 媒体选择，count = 1表示单选，count大于1表示多选。 |
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