harmony 鸿蒙@ohos.data.dataShare (Data Sharing)
@ohos.data.dataShare (Data Sharing)
The DataShare module allows an application to manage its own data and share data with other applications on the same device.
NOTE
The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.
The APIs provided by this module are system APIs.
The APIs of this module can be used only in the stage model.
Modules to Import
import dataShare from '@ohos.data.dataShare'
dataShare.createDataShareHelper
createDataShareHelper(context: Context, uri: string, callback: AsyncCallback<DataShareHelper>): void
Creates a DataShareHelper instance. This API uses an asynchronous callback to return the result.
Observe the following when using this API: - If an application running in the background needs to call this API to access DataShareExtension, it must have the ohos.permission.START_ABILITIES_FROM_BACKGROUND permission. - If exported of the target DataShareExtension is false in cross-application scenarios, the caller must have the ohos.permission.START_INVISIBLE_ABILITY permission. - For details about the startup rules for the components in the stage model, see Component Startup Rules (Stage Model).
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
context | Context | Yes | Context of the application. |
uri | string | Yes | Uniform Resource Identifier (URI) of the server application to connect. |
callback | AsyncCallback<DataShareHelper> | Yes | Callback invoked to return the result. If the operation is successful, err is undefined and data is the DataShareHelper instance created. Otherwise, err is an error object. |
Error codes
For details about the error codes, see DataShare Error Codes.
ID | Error Message |
---|---|
15700010 | The DataShareHelper is not initialized successfully. |
Example
import { BusinessError } from '@ohos.base'
let uri = ("datashare:///com.samples.datasharetest.DataShare");
let dataShareHelper: dataShare.DataShareHelper|undefined = undefined;
try {
dataShare.createDataShareHelper(this.context, uri, (err, data) => {
if (err !== undefined) {
console.error(`createDataShareHelper error: code: ${err.code}, message: ${err.message} `);
return;
}
console.info("createDataShareHelper succeed, data : " + data);
dataShareHelper = data;
});
} catch (err) {
let code = (err as BusinessError).code;
let message = (err as BusinessError).message;
console.error(`createDataShareHelper error: code: ${code}, message: ${message} `);
};
dataShare.createDataShareHelper10+
createDataShareHelper(context: Context, uri: string, options: DataShareHelperOptions, callback: AsyncCallback<DataShareHelper>): void
Creates a DataShareHelper instance. This API uses an asynchronous callback to return the result.
Observe the following when using this API: - If an application running in the background needs to call this API to access DataShareExtension, it must have the ohos.permission.START_ABILITIES_FROM_BACKGROUND permission. - If exported of the target DataShareExtension is false in cross-application scenarios, the caller must have the ohos.permission.START_INVISIBLE_ABILITY permission. - For details about the startup rules for the components in the stage model, see Component Startup Rules (Stage Model).
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Name | Type | Mandatory | Description |
---|---|---|---|
context | Context | Yes | Context of the application. |
uri | string | Yes | URI of the server application to connect. |
options | DataShareHelperOptions | Yes | Configuration specifying whether DataShareHelper is in proxy mode. |
callback | AsyncCallback<DataShareHelper> | Yes | Callback invoked to return the result. If the operation is successful, err is undefined and data is the DataShareHelper instance created. Otherwise, err is an error object. |
Error codes
For details about the error codes, see DataShare Error Codes.
ID | Error Message |
---|---|
15700010 | The DataShareHelper is not initialized successfully. |
Example
import { BusinessError } from '@ohos.base'
let uri = ("datashareproxy://com.samples.datasharetest.DataShare");
let dataShareHelper: dataShare.DataShareHelper|undefined = undefined;
try {
dataShare.createDataShareHelper(this.context, uri, {isProxy : true}, (err, data) => {
if (err !== undefined) {
console.error(`createDataShareHelper error: code: ${err.code}, message: ${err.message} `);
return;
}
console.info("createDataShareHelper succeed, data : " + data);
dataShareHelper = data;
});
} catch (err) {
let code = (err as BusinessError).code;
let message = (err as BusinessError).message;
console.error(`createDataShareHelper error: code: ${code}, message: ${message} `);
};
dataShare.createDataShareHelper
createDataShareHelper(context: Context, uri: string, options?: DataShareHelperOptions): Promise<DataShareHelper>
Creates a DataShareHelper instance. This API uses a promise to return the result.
Observe the following when using this API: - If an application running in the background needs to call this API to access DataShareExtension, it must have the ohos.permission.START_ABILITIES_FROM_BACKGROUND permission. - If exported of the target DataShareExtension is false in cross-application scenarios, the caller must have the ohos.permission.START_INVISIBLE_ABILITY permission. - For details about the startup rules for the components in the stage model, see Component Startup Rules (Stage Model).
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
context | Context | Yes | Context of the application. |
uri | string | Yes | URI of the server application to connect. |
options | DataShareHelperOptions | No | Configuration of the DataShareHelper instance. This parameter is supported from API version 10. If it is not set, DataShareHelper is not in proxy mode. |
Return value
Type | Description |
---|---|
Promise<DataShareHelper> | Promise used to return the DataShareHelper instance created. |
Error codes
For details about the error codes, see DataShare Error Codes.
ID | Error Message |
---|---|
15700010 | The DataShareHelper is not initialized successfully. |
Example
import { BusinessError } from '@ohos.base'
let uri = ("datashareproxy://com.samples.datasharetest.DataShare");
let dataShareHelper: dataShare.DataShareHelper|undefined = undefined;
try {
dataShare.createDataShareHelper(this.context, uri, {isProxy : true}).then((data: dataShare.DataShareHelper) => {
console.info("createDataShareHelper succeed, data : " + data);
dataShareHelper = data;
}). catch((err: BusinessError) => {
console.error(`createDataShareHelper error: code: ${err.code}, message: ${err.message} `);
});
} catch (err) {
let code = (err as BusinessError).code;
let message = (err as BusinessError).message;
console.error(`createDataShareHelper error: code: ${code}, message: ${message} `);
};
DataShareHelperOptions10+
Defines whether DataShareHelper is in proxy mode.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Name | Type | Mandatory | Description |
---|---|---|---|
isProxy | boolean | No | Whether the DataShareHelper is in proxy mode. The default value is false. If the value is true, the DataShareHelper to be created is in proxy mode, and all operations will not open the data provider application unless the database does not exist. If the database does not exist, createDataShareHelper will start the data provider to create a database. |
TemplateId10+
Defines the TemplateId struct. TemplateId is generated by addTemplate to identify a template.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Name | Type | Mandatory | Description |
---|---|---|---|
subscriberId | string | Yes | ID of the subscriber who handles the callback. The value must the same as the subscriberId in addTemplate. The ID of each subscriber must be unique. |
bundleNameOfOwner | string | Yes | Bundle name of the template owner. The value must be the same as the bundleName in addTemplate. |
PublishedItem10+
Defines the data to publish.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Name | Type | Mandatory | Description |
---|---|---|---|
key | string | Yes | Key of the data to publish. |
data | string |ArrayBuffer | Yes | Data to publish. If the data to publish exceeds 20 KB, you are advised to use data of the ArrayBuffer type. |
subscriberId | string | Yes | Subscriber ID. |
RdbDataChangeNode10+
Defines the subscription/unsubscription result of the RDB data changes.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the callback. |
templateId | TemplateId | Yes | ID of the template that triggers the callback. |
data | Array<string> | Yes | Data of the callback. |
PublishedDataChangeNode10+
Defines the subscription/unsubscription result of the changes in the published data.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Name | Type | Mandatory | Description |
---|---|---|---|
bundleName | string | Yes | Bundle name of the callback. |
data | Array<PublishedItem> | Yes | Data of the callback. |
Template10+
Defines the struct of the template used in a subscription.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Name | Type | Mandatory | Description |
---|---|---|---|
predicates | { [key: string]: string } | Yes | Predicates to use. When on is called, the predicates are used to generate data. This parameter applies only to RDB data storage. |
scheduler | string | Yes | Template scheduler SQL, which is embedded with a custom function. Currently, the remindTimer function is embedded. The remindTimer triggers a subscription-based update in specified scenarios. The scheduler SQL statement is triggered when: 1. The subscribed data is modified. 2. The first subscription is added to the corresponding database. |
OperationResult10+
Defines the result of the operation for subscribing to or unsubscribing from the data changes or published data.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Name | Type | Mandatory | Description |
---|---|---|---|
key | string | Yes | Key of the operation result. |
result | number | Yes | Operation result. If the operation is successful, 0 is returned; otherwise, an error code is returned. |
DataShareHelper
Provides a DataShareHelper instance to access or manage data on the server. Before calling an API provided by DataShareHelper, you must create a DataShareHelper instance using createDataShareHelper.
on(‘dataChange’)
on(type: ‘dataChange’, uri: string, callback: AsyncCallback<void>): void
Subscribes to changes of the specified data. After an observer is registered, the subscriber will receive a notification when the change notification is triggered (the notifyChange() method is called). This API uses an asynchronous callback to return the result.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
type | string | Yes | Event type. The value is dataChange, which indicates data changes. |
uri | string | Yes | URI of the data. |
callback | AsyncCallback<void> | Yes | Callback invoked to return the result. If data is changed, the value of err is undefined. Otherwise, this callback is not invoked or the value of err is an error object. |
Example
let onCallback: () => void = (): void => {
console.info("**** Observer on callback ****");
}
let uri = ("datashare:///com.samples.datasharetest.DataShare");
if (dataShareHelper !== undefined) {
(dataShareHelper as dataShare.DataShareHelper).on("dataChange", uri, onCallback);
}
off(‘dataChange’)
off(type: ‘dataChange’, uri: string, callback?: AsyncCallback<void>): void
Unsubscribes from data changes.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
type | string | Yes | Event type. The value is dataChange, which indicates data changes. |
uri | string | Yes | URI of the target data. |
callback | AsyncCallback<void> | No | Callback for the data change. If this parameter is left empty, all notification events of the URI will be unsubscribed from. |
Example
let callback: () => void = (): void => {
console.info("**** Observer on callback ****");
}
let uri = ("datashare:///com.samples.datasharetest.DataShare");
if (dataShareHelper != undefined) {
(dataShareHelper as dataShare.DataShareHelper).on("dataChange", uri, callback);
(dataShareHelper as dataShare.DataShareHelper).off("dataChange", uri, callback);
}
addTemplate10+
addTemplate(uri: string, subscriberId: string, template: Template): void
Adds a data template with the specified subscriber.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data template to add. |
subscriberId | string | Yes | Unique ID of the template subscriber. |
template | Template | Yes | Data template to add. |
Error codes
For details about the error codes, see DataShare Error Codes.
ID | Error Message |
---|---|
15700011 | The uri is not exist. |
Example
let uri = ("datashareproxy://com.samples.datasharetest.DataShare");
let subscriberId = '11';
let key1: string = "p1";
let value1: string = "select cityColumn as city_1, visitedCilumn as visited_1 from citys where like = true";
let key2: string = "p2";
let value2: string = "select cityColumn as city_2, visitedCilumn as visited_2 from citys where like = false";
let template: dataShare.Template = {
predicates : {
key1 : value1,
key2 : value2,
},
scheduler : "select remindTimer(time) from TBL00"
}
if (dataShareHelper != undefined) {
(dataShareHelper as dataShare.DataShareHelper).addTemplate(uri, subscriberId, template);
}
delTemplate10+
delTemplate(uri: string, subscriberId: string): void
Deletes a data template based on the specified subscriber.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data template to delete. |
subscriberId | string | Yes | Unique ID of the subscriber. |
Error codes
For details about the error codes, see DataShare Error Codes.
ID | Error Message |
---|---|
15700011 | The uri is not exist. |
Example
let uri = ("datashareproxy://com.samples.datasharetest.DataShare");
let subscriberId = '11';
let key1: string = "p1";
let value1: string = "select cityColumn as city_1, visitedCilumn as visited_1 from citys where like = true";
let key2: string = "p2";
let value2: string = "select cityColumn as city_2, visitedCilumn as visited_2 from citys where like = false";
let template: dataShare.Template = {
predicates : {
key1 : value1,
key2 : value2,
},
scheduler : "select remindTimer(time) from TBL00"
}
if (dataShareHelper != undefined) {
(dataShareHelper as dataShare.DataShareHelper).addTemplate(uri, subscriberId, template);
(dataShareHelper as dataShare.DataShareHelper).delTemplate(uri, subscriberId);
}
on(‘rdbDataChange’)10+
on(type: ‘rdbDataChange’, uris: Array<string>, templateId: TemplateId, callback: AsyncCallback<RdbDataChangeNode>): Array<OperationResult>
Subscribes to the changes of the data corresponding to the specified URI and template.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
type | string | Yes | Event type. The value is rdbDataChange, which indicates the RDB data change event. If type is any other value, there is no response to this API. |
uris | Array<string> | Yes | URIs of the data to operate. |
templateId | TemplateId | Yes | ID of the template that triggers the callback. |
callback | AsyncCallback<RdbDataChangeNode> | Yes | Callback invoked to return the result when the specified data changes. The err is undefined, and node is the new data. Otherwise, this callback is not triggered or err is an error object. |
Return value
Type | Description |
---|---|
Array<OperationResult> | Returns the operation result. |
Example
import { BusinessError } from '@ohos.base'
let onCallback: (err: BusinessError, node: dataShare.RdbDataChangeNode) => void = (err: BusinessError, node:dataShare.RdbDataChangeNode): void => {
console.info("onCallback " + JSON.stringify(node.uri));
console.info("onCallback " + JSON.stringify(node.templateId));
console.info("onCallback " + node.data.length);
for (let i = 0; i < node.data.length; i++) {
console.info("onCallback " + typeof node.data[i] + " " + node.data[i]);
}
}
let uri = ("datashareproxy://com.samples.datasharetest.DataShare");
let templateId:dataShare.TemplateId = {subscriberId:"11", bundleNameOfOwner:"com.acts.ohos.data.datasharetest"};
if (dataShareHelper != undefined) {
let result: Array<dataShare.OperationResult> = (dataShareHelper as dataShare.DataShareHelper).on("rdbDataChange", [uri], templateId, onCallback);
}
off(‘rdbDataChange’)10+
off(type: ‘rdbDataChange’, uris: Array<string>, templateId: TemplateId, callback?: AsyncCallback<RdbDataChangeNode>): Array<OperationResult>
Unsubscribes from the changes of the data corresponding to the specified URI and template.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
type | string | Yes | Event type. The value is rdbDataChange, which indicates the RDB data changes. |
uris | Array<string> | Yes | URIs of the data to operate. |
templateId | TemplateId | Yes | ID of the template that triggers the callback. |
callback | AsyncCallback<RdbDataChangeNode> | No | Callback for the RDB data change. If this parameter is left empty, all notification events of the URI will be unsubscribed from. |
Return value
Type | Description |
---|---|
Array<OperationResult> | Returns the operation result. |
Example
let uri = ("datashareproxy://com.samples.datasharetest.DataShare");
let templateId:dataShare.TemplateId = {subscriberId:"11", bundleNameOfOwner:"com.acts.ohos.data.datasharetest"};
if (dataShareHelper != undefined) {
let result: Array<dataShare.OperationResult> = (dataShareHelper as dataShare.DataShareHelper).off("rdbDataChange", [uri], templateId);
}
on(‘publishedDataChange’)10+
on(type: ‘publishedDataChange’, uris: Array<string>, subscriberId: string, callback: AsyncCallback<PublishedDataChangeNode>): Array<OperationResult>
Subscribes to changes of the published data.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
type | string | Yes | Event type. The value is publishedDataChange, which indicates the event of published data changes. |
uris | Array<string> | Yes | URIs of the data to operate. |
subscriberId | string | Yes | Subscriber ID of the callback. |
callback | AsyncCallback<PublishedDataChangeNode> | Yes | Callback invoked to return the result when the published data changes. The err is undefined, and node is the new data. Otherwise, this callback is not triggered or err is an error object. |
Return value
Type | Description |
---|---|
Array<OperationResult> | Returns the operation result. |
Example
import { BusinessError } from '@ohos.base'
let onPublishCallback: (err: BusinessError, node: dataShare.PublishedDataChangeNode) => void = (err: BusinessError, node:dataShare.PublishedDataChangeNode): void => {
console.info("onPublishCallback node bundleName " + JSON.stringify(node.bundleName));
console.info("onPublishCallback node data size" + node.data.length);
for (let i = 0; i < node.data.length; i++) {
console.info("onPublishCallback node " + typeof node.data[i].data);
if (typeof node.data[i].data != 'string') {
let array: ArrayBuffer = node.data[i].data as ArrayBuffer;
let data: Uint8Array = new Uint8Array(array);
console.info("onPublishCallback " + i + " " + JSON.stringify(data));
}
console.info("onPublishCallback data " + i + " " + JSON.stringify(node.data[i]));
}
}
let uris:Array<string> = ['city', 'datashareproxy://com.acts.ohos.data.datasharetest/appInfo', 'key2'];
let subscriberId = '11';
if (dataShareHelper != undefined) {
let result: Array<dataShare.OperationResult> = (dataShareHelper as dataShare.DataShareHelper).on('publishedDataChange', uris, subscriberId, onPublishCallback);
}
off(‘publishedDataChange’)10+
off(type: ‘publishedDataChange’, uris: Array<string>, subscriberId: string, callback?: AsyncCallback<PublishedDataChangeNode>): Array<OperationResult>
Unsubscribes from the changes of the published data.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
type | string | Yes | Event type. The value is publishedDataChange, which indicates the published data changes. |
uris | Array<string> | Yes | URIs of the data to operate. |
subscriberId | string | Yes | Subscriber ID of the callback. |
callback | AsyncCallback<PublishedDataChangeNode> | No | Callback for the published data change. If this parameter is left empty, all callbcks of the URI will be unregistered. |
Return value
Type | Description |
---|---|
Array<OperationResult> | Returns the operation result. |
Example
import { BusinessError } from '@ohos.base'
let offCallback: (err: BusinessError, node: dataShare.PublishedDataChangeNode) => void = (err: BusinessError, node:dataShare.PublishedDataChangeNode): void => {
console.info("**** Observer off callback ****");
}
let uris:Array<string> = ["city", "datashareproxy://com.acts.ohos.data.datasharetest/appInfo", "key2"];
let subscriberId = '11';
if (dataShareHelper != undefined) {
let result: Array<dataShare.OperationResult> = (dataShareHelper as dataShare.DataShareHelper).off("publishedDataChange", uris, subscriberId, offCallback);
}
publish10+
publish(data: Array<PublishedItem>, bundleName: string, version: number, callback: AsyncCallback<Array<OperationResult>>): void
Publishes data to the database.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
data | Array<PublishedItem> | Yes | Data to publish. |
bundleName | string | Yes | Application of the data to publish. This parameter is valid only for the private data published. Only the application can read the data. |
version | number | Yes | Version of the data to publish. A larger value indicates a later data version. If the version of the data published is earlier than that of the data in the database, the data in the database will not be updated. |
callback | AsyncCallback<Array<OperationResult>> | Yes | Callback invoked to return the result. If data is published, err is undefined, and result is the data publish result. Otherwise, this callback will not be triggered or err is an error object. |
Error codes
For details about the error codes, see DataShare Error Codes.
ID | Error Message |
---|---|
15700012 | The data area is not exist. |
Example
import { BusinessError } from '@ohos.base'
let arrayBuffer = new ArrayBuffer(1);
let version = 1;
let dataArray : Array<dataShare.PublishedItem> = [{key:"key2", subscriberId:"11", data:arrayBuffer}];
let publishCallback: (err: BusinessError, result: Array<dataShare.OperationResult>) => void = (err: BusinessError, result: Array<dataShare.OperationResult>): void => {
console.info("publishCallback " + JSON.stringify(result));
}
try {
console.info("dataArray length is:", dataArray.length);
if (dataShareHelper != undefined) {
(dataShareHelper as dataShare.DataShareHelper).publish(dataArray, "com.acts.ohos.data.datasharetest", version, publishCallback);
}
} catch (e) {
console.error("publish error " + JSON.stringify(e));
}
publish10+
publish(data: Array<PublishedItem>, bundleName: string, callback: AsyncCallback<Array<OperationResult>>): void
Publishes data to the database.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
data | Array<PublishedItem> | Yes | Data to publish. |
bundleName | string | Yes | Application of the data to publish. This parameter is valid only for the private data published. Only the application can read the data. |
callback | AsyncCallback<Array<OperationResult>> | Yes | Callback invoked to return the result. If data is published, err is undefined, and result is the data publish result. Otherwise, this callback will not be triggered or err is an error object. |
Example
Error codes
For details about the error codes, see DataShare Error Codes.
ID | Error Message |
---|---|
15700012 | The data area is not exist. |
import { BusinessError } from '@ohos.base'
let publishCallback: (err: BusinessError, result: Array<dataShare.OperationResult>) => void = (err: BusinessError, result: Array<dataShare.OperationResult>): void => {
console.info("publishCallback " + JSON.stringify(result));
}
let dataArray : Array<dataShare.PublishedItem> = [
{key:"city", subscriberId:"11", data:"xian"},
{key:"datashareproxy://com.acts.ohos.data.datasharetest/appInfo", subscriberId:"11", data:"appinfo is just a test app"},
{key:"empty", subscriberId:"11", data:"nobody sub"}];
if (dataShareHelper != undefined) {
(dataShareHelper as dataShare.DataShareHelper).publish(dataArray, "com.acts.ohos.data.datasharetest", publishCallback);
}
publish10+
publish(data: Array<PublishedItem>, bundleName: string, version?: number): Promise<Array<OperationResult>>
Publishes data to the database.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
data | Array<PublishedItem> | Yes | Data to publish. |
bundleName | string | Yes | Application of the data to publish. This parameter is valid only for the private data published. Only the application can read the data. |
version | number | No | Version of the data to publish. A larger value indicates a later data version. If the version of the data published is earlier than that of the data in the database, the data in the database will not be updated. If the data version is not checked, leave this parameter unspecified. |
Return value
Type | Description |
---|---|
Promise<Array<OperationResult>> | Returns the operation result. |
Error codes
For details about the error codes, see DataShare Error Codes.
ID | Error Message |
---|---|
15700012 | The data area is not exist. |
Example
let dataArray: Array<dataShare.PublishedItem> = [
{key:"city", subscriberId:"11", data:"xian"},
{key:"datashareproxy://com.acts.ohos.data.datasharetest/appInfo", subscriberId:"11", data:"appinfo is just a test app"},
{key:"empty", subscriberId:"11", data:"nobody sub"}];
if (dataShareHelper != undefined) {
let result: Promise<Array<dataShare.OperationResult>> = (dataShareHelper as dataShare.DataShareHelper).publish(dataArray, "com.acts.ohos.data.datasharetest");
}
getPublishedData10+
getPublishedData(bundleName: string, callback: AsyncCallback<Array<PublishedItem>>): void
Obtains the published data of an application.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
bundleName | string | Yes | Application to which the data belongs. |
callback | AsyncCallback<Array<PublishedItem>> | Yes | Callback invoked to return the result. |
Error codes
For details about the error codes, see DataShare Error Codes.
ID | Error Message |
---|---|
15700012 | The data area is not exist. |
Example
import { BusinessError } from '@ohos.base'
let publishCallback: (err: BusinessError, data: Array<dataShare.PublishedItem>) => void = (err: BusinessError, result: Array<dataShare.PublishedItem>): void => {
console.info("**** Observer publish callback ****");
}
if (dataShareHelper != undefined) {
(dataShareHelper as dataShare.DataShareHelper).getPublishedData("com.acts.ohos.data.datasharetest", publishCallback);
}
getPublishedData10+
getPublishedData(bundleName: string): Promise<Array<PublishedItem>>
Obtains the published data of an application.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
bundleName | string | Yes | Application to which the data belongs. |
Return value
Type | Description |
---|---|
Promise<Array<PublishedItem>> | Promise used to return the data obtained. |
Error codes
For details about the error codes, see DataShare Error Codes.
ID | Error Message |
---|---|
15700012 | The data area is not exist. |
Example
if (dataShareHelper != undefined) {
let publishedData: Promise<Array<dataShare.PublishedItem>> = (dataShareHelper as dataShare.DataShareHelper).getPublishedData("com.acts.ohos.data.datasharetest");
}
insert
insert(uri: string, value: ValuesBucket, callback: AsyncCallback<number>): void
Inserts a single data record into the database. This API uses an asynchronous callback to return the result.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data to insert. |
value | ValuesBucket | Yes | Data to insert. If this parameter is empty, a blank row will be inserted. |
callback | AsyncCallback<number> | Yes | Callback invoked to return the result. If the operation is successful, err is undefined and data is the index of the inserted data record. Otherwise, err is an error object. The data index is not returned if the APIs of the database in use, for example, the key-value database (KVDB), do not support the return of indexes. |
Example
import { ValuesBucket } from '@ohos.data.ValuesBucket'
import { BusinessError } from '@ohos.base'
let uri = ("datashare:///com.samples.datasharetest.DataShare");
let key1: string = "name";
let value1: string = "rose";
let key2: string = "age";
let value2: number = 22;
let key3: string = "salary";
let value3: number = 200.5;
const valueBucket: ValuesBucket = {
key1: value1,
key2: value2,
key3: value3,
}
try {
if (dataShareHelper != undefined) {
(dataShareHelper as dataShare.DataShareHelper).insert(uri, valueBucket, (err: BusinessError, data: number) => {
if (err !== undefined) {
console.error(`insert error: code: ${err.code}, message: ${err.message} `);
return;
}
console.info("insert succeed, data : " + data);
});
}
} catch (err) {
let code = (err as BusinessError).code;
let message = (err as BusinessError).message;
console.error(`insert error: code: ${code}, message: ${message} `);
};
insert
insert(uri: string, value: ValuesBucket): Promise<number>
Inserts a single data record into the database. This API uses a promise to return the result.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data to insert. |
value | ValuesBucket | Yes | Data to insert. If this parameter is empty, a blank row will be inserted. |
Return value
Type | Description |
---|---|
Promise<number> | Promise used to return the index of the inserted data record. The data index is not returned if the APIs of the database in use (for example, KVDB) do not support the return of indexes. |
Example
import { BusinessError } from '@ohos.base'
import { ValuesBucket } from '@ohos.data.ValuesBucket'
let uri = ("datashare:///com.samples.datasharetest.DataShare");
let key1: string = "name";
let value1: string = "rose1";
let key2: string = "age";
let value2: number = 21;
let key3: string = "salary";
let value3: number = 20.5;
const valueBucket: ValuesBucket = {
key1: value1,
key2: value2,
key3: value3,
}
try {
if (dataShareHelper != undefined) {
(dataShareHelper as dataShare.DataShareHelper).insert(uri, valueBucket).then((data: number) => {
console.info("insert succeed, data : " + data);
}).catch((err: BusinessError) => {
console.error(`insert error: code: ${err.code}, message: ${err.message} `);
});
}
} catch (err) {
let code = (err as BusinessError).code;
let message = (err as BusinessError).message;
console.error(`insert error: code: ${code}, message: ${message} `);
};
delete
delete(uri: string, predicates: dataSharePredicates.DataSharePredicates, callback: AsyncCallback<number>): void
Deletes one or more data records from the database. This API uses an asynchronous callback to return the result.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data to delete. |
predicates | dataSharePredicates.DataSharePredicates | Yes | Filter criteria. The predicate methods supported by delete() vary depending on the database in use. For example, the KVDB supports only inKeys. |
callback | AsyncCallback<number> | Yes | Callback invoked to return the result. If the operation is successful, err is undefined and data is the number of deleted data records. Otherwise, err is an error object. The number of deleted data records is not returned if the APIs of the database in use (for example, KVDB) do not support this return. |
Example
import dataSharePredicates from '@ohos.data.dataSharePredicates';
import { BusinessError } from '@ohos.base'
let uri = ("datashare:///com.samples.datasharetest.DataShare");
let da = new dataSharePredicates.DataSharePredicates();
da.equalTo("name", "ZhangSan");
try {
if (dataShareHelper != undefined) {
(dataShareHelper as dataShare.DataShareHelper).delete(uri, da, (err: BusinessError, data: number) => {
if (err !== undefined) {
console.error(`delete error: code: ${err.code}, message: ${err.message} `);
return;
}
console.info("delete succeed, data : " + data);
});
}
} catch (err) {
let code = (err as BusinessError).code;
let message = (err as BusinessError).message;
console.error(`delete error: code: ${code}, message: ${message} `);
};
delete
delete(uri: string, predicates: dataSharePredicates.DataSharePredicates): Promise<number>
Deletes one or more data records from the database. This API uses a promise to return the result.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data to delete. |
predicates | dataSharePredicates.DataSharePredicates | Yes | Filter criteria. The predicate methods supported by delete() vary depending on the database in use. For example, the KVDB supports only inKeys. |
Return value
Type | Description |
---|---|
Promise<number> | Promise used to return the number of deleted data records. The number of deleted data records is not returned if the APIs of the database in use (for example, KVDB) do not support this return. |
Example
import dataSharePredicates from '@ohos.data.dataSharePredicates';
import { BusinessError } from '@ohos.base'
let uri = ("datashare:///com.samples.datasharetest.DataShare");
let da = new dataSharePredicates.DataSharePredicates();
da.equalTo("name", "ZhangSan");
try {
if (dataShareHelper != undefined) {
(dataShareHelper as dataShare.DataShareHelper).delete(uri, da).then((data: number) => {
console.info("delete succeed, data : " + data);
}).catch((err: BusinessError) => {
console.error(`delete error: code: ${err.code}, message: ${err.message} `);
});
}
} catch (err) {
let code = (err as BusinessError).code;
let message = (err as BusinessError).message;
console.error(`delete error: code: ${code}, message: ${message} `);
};
query
query(uri: string, predicates: dataSharePredicates.DataSharePredicates, columns: Array<string>, callback: AsyncCallback<DataShareResultSet>): void
Queries data in the database. This API uses an asynchronous callback to return the result.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data to query. |
predicates | dataSharePredicates.DataSharePredicates | Yes | Filter criteria. The predicate methods supported by query() vary depending on the database used. For example, the KVDB supports only inKeys and prefixKey. |
columns | Array<string> | Yes | Columns to query. If this parameter is empty, all columns will be queried. |
callback | AsyncCallback<DataShareResultSet> | Yes | Callback invoked to return the result. If the operation is successful, err is undefined and data is the result set obtained. Otherwise, err is an error object. |
Example
import dataSharePredicates from '@ohos.data.dataSharePredicates';
import { BusinessError } from '@ohos.base'
import DataShareResultSet from '@ohos.data.DataShareResultSet'
let uri = ("datashare:///com.samples.datasharetest.DataShare");
let columns = ["*"];
let da = new dataSharePredicates.DataSharePredicates();
da.equalTo("name", "ZhangSan");
try {
if (dataShareHelper != undefined) {
(dataShareHelper as dataShare.DataShareHelper).query(uri, da, columns, (err: BusinessError, data: DataShareResultSet) => {
if (err !== undefined) {
console.error(`query error: code: ${err.code}, message: ${err.message} `);
return;
}
console.info("query succeed, rowCount : " + data.rowCount);
});
}
} catch (err) {
let code = (err as BusinessError).code;
let message = (err as BusinessError).message;
console.error(`query error: code: ${code}, message: ${message} `);
};
query
query(uri: string, predicates: dataSharePredicates.DataSharePredicates, columns: Array<string>): Promise<DataShareResultSet>
Queries data in the database. This API uses a promise to return the result.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data to query. |
predicates | dataSharePredicates.DataSharePredicates | Yes | Filter criteria. The predicate methods supported by query() vary depending on the database used. For example, the KVDB supports only inKeys and prefixKey. |
columns | Array<string> | Yes | Columns to query. If this parameter is empty, all columns will be queried. |
Return value
Type | Description |
---|---|
Promise<DataShareResultSet> | Promise used to return the result set obtained. |
Example
import dataSharePredicates from '@ohos.data.dataSharePredicates';
import { BusinessError } from '@ohos.base'
import DataShareResultSet from '@ohos.data.DataShareResultSet'
let uri = ("datashare:///com.samples.datasharetest.DataShare");
let columns = ["*"];
let da = new dataSharePredicates.DataSharePredicates();
da.equalTo("name", "ZhangSan");
try {
if (dataShareHelper != undefined) {
(dataShareHelper as dataShare.DataShareHelper).query(uri, da, columns).then((data: DataShareResultSet) => {
console.info("query succeed, rowCount : " + data.rowCount);
}).catch((err: BusinessError) => {
console.error(`query error: code: ${err.code}, message: ${err.message} `);
});
}
} catch (err) {
let code = (err as BusinessError).code;
let message = (err as BusinessError).message;
console.error(`query error: code: ${code}, message: ${message} `);
};
update
update(uri: string, predicates: dataSharePredicates.DataSharePredicates, value: ValuesBucket, callback: AsyncCallback<number>): void
Updates data in the database. This API uses an asynchronous callback to return the result.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data to update. |
predicates | dataSharePredicates.DataSharePredicates | Yes | Filter criteria. The predicate methods supported by update() vary depending on the database in use. For example, only the relational database (RDB) supports predicates. |
value | ValuesBucket | Yes | New data. |
callback | AsyncCallback<number> | Yes | Callback invoked to return the result. If the operation is successful, err is undefined and data is the number of updated data records. Otherwise, err is an error object. The number of updated data records is not returned if the APIs of the database in use (for example, KVDB) do not support this return. |
Example
import dataSharePredicates from '@ohos.data.dataSharePredicates';
import { BusinessError } from '@ohos.base'
import { ValuesBucket } from '@ohos.data.ValuesBucket'
let uri = ("datashare:///com.samples.datasharetest.DataShare");
let da = new dataSharePredicates.DataSharePredicates();
da.equalTo("name", "ZhangSan");
let key1: string = "name";
let value1: string = "roe1"
let key2: string = "age";
let value2: number = 21
let key3: string = "salary";
let value3: number = 20.5;
const va: ValuesBucket = {
key1: value1,
key2: value2,
key3: value3,
}
try {
if (dataShareHelper != undefined) {
(dataShareHelper as dataShare.DataShareHelper).update(uri, da, va, (err: BusinessError, data: number) => {
if (err !== undefined) {
console.error(`update error: code: ${err.code}, message: ${err.message} `);
return;
}
console.info("update succeed, data : " + data);
});
}
} catch (err) {
let code = (err as BusinessError).code;
let message = (err as BusinessError).message;
console.error(`update error: code: ${code}, message: ${message} `);
};
update
update(uri: string, predicates: dataSharePredicates.DataSharePredicates, value: ValuesBucket): Promise<number>
Updates data in the database. This API uses a promise to return the result.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data to update. |
predicates | dataSharePredicates.DataSharePredicates | Yes | Filter criteria. The predicate methods supported by update() vary depending on the database in use. For example, only the relational database (RDB) supports predicates. |
value | ValuesBucket | Yes | New data. |
Return value
Type | Description |
---|---|
Promise<number> | Promise used to return the number of data records updated. The number of updated data records is not returned if the APIs of the database in use (for example, KVDB) do not support this return. |
Example
import dataSharePredicates from '@ohos.data.dataSharePredicates';
import { ValuesBucket } from '@ohos.data.ValuesBucket'
import { BusinessError } from '@ohos.base'
let uri = ("datashare:///com.samples.datasharetest.DataShare");
let da = new dataSharePredicates.DataSharePredicates();
da.equalTo("name", "ZhangSan");
let key1: string = "name";
let value1: string = "roe1"
let key2: string = "age";
let value2: number = 21
let key3: string = "salary";
let value3: number = 20.5;
const va: ValuesBucket = {
key1: value1,
key2: value2,
key3: value3,
}
try {
if (dataShareHelper != undefined) {
(dataShareHelper as dataShare.DataShareHelper).update(uri, da, va).then((data: number) => {
console.info("update succeed, data : " + data);
}).catch((err: BusinessError) => {
console.error(`update error: code: ${err.code}, message: ${err.message} `);
});
}
} catch (err) {
let code = (err as BusinessError).code;
let message = (err as BusinessError).message;
console.error(`update error: code: ${code}, message: ${message} `);
};
batchInsert
batchInsert(uri: string, values: Array<ValuesBucket>, callback: AsyncCallback<number>): void
Batch inserts data into the database. This API uses an asynchronous callback to return the result. Silent access is not supported currently.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data to insert. |
values | Array<ValuesBucket> | Yes | Data to insert. |
callback | AsyncCallback<number> | Yes | Callback invoked to return the result. If the operation is successful, err is undefined and data is the number of data records inserted. Otherwise, err is an error object. The number of inserted data records is not returned if the APIs of the database in use (for example, KVDB) do not support this return. |
Example
import { ValuesBucket } from '@ohos.data.ValuesBucket'
import { BusinessError } from '@ohos.base'
let uri = ("datashare:///com.samples.datasharetest.DataShare");
let key1: string = "name";
let value11: string = "roe11"
let key2: string = "age";
let value21: number = 21;
let key3: string = "salary";
let value31: number = 20.5;
let valuesBucket1: ValuesBucket = {
key1: value11,
key2: value21,
key3: value31,
}
let vbs = new Array(valuesBucket1);
try {
if (dataShareHelper != undefined) {
(dataShareHelper as dataShare.DataShareHelper).batchInsert(uri, vbs, (err, data) => {
if (err !== undefined) {
console.error(`batchInsert error: code: ${err.code}, message: ${err.message} `);
return;
}
console.info("batchInsert succeed, data : " + data);
});
}
} catch (err) {
let code = (err as BusinessError).code;
let message = (err as BusinessError).message;
console.error(`batchInsert error: code: ${code}, message: ${message} `);
};
batchInsert
batchInsert(uri: string, values: Array<ValuesBucket>): Promise<number>
Batch inserts data into the database. This API uses a promise to return the result. Silent access is not supported currently.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data to insert. |
values | Array<ValuesBucket> | Yes | Data to insert. |
Return value
Type | Description |
---|---|
Promise<number> | Promise used to return the number of data records inserted. The number of inserted data records is not returned if the APIs of the database (for example, KVDB) in use do not the return of the number of data records. |
Example
import { ValuesBucket } from '@ohos.data.ValuesBucket'
import { BusinessError } from '@ohos.base'
let uri = ("datashare:///com.samples.datasharetest.DataShare");
let key1: string = "name";
let value11: string = "roe11"
let key2: string = "age";
let value21: number = 21;
let key3: string = "salary";
let value31: number = 20.5;
let valuesBucket1: ValuesBucket = {
key1: value11,
key2: value21,
key3: value31,
}
let vbs = new Array(valuesBucket1);
try {
if (dataShareHelper != undefined) {
(dataShareHelper as dataShare.DataShareHelper).batchInsert(uri, vbs).then((data: number) => {
console.info("batchInsert succeed, data : " + data);
}).catch((err: BusinessError) => {
console.error(`batchInsert error: code: ${err.code}, message: ${err.message} `);
});
}
} catch (err) {
let code = (err as BusinessError).code;
let message = (err as BusinessError).message
console.error(`batchInsert error: code: ${code}, message: ${message} `);
};
normalizeUri
normalizeUri(uri: string, callback: AsyncCallback<string>): void
Normalizes a DataShare URI. The DataShare URI can be used only by the local device, but the normalized URI can be used across devices. This API uses an asynchronous callback to return the result. Silent access is not supported currently.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI to normalize. |
callback | AsyncCallback<string> | Yes | Callback invoked to return the result. If the operation is successful, err is undefined and data is the normalized URI (if null is returned, URI normalization is not supported). Otherwise, err is an error object. |
Example
import { BusinessError } from '@ohos.base'
let uri = ("datashare:///com.samples.datasharetest.DataShare");
if (dataShareHelper != undefined) {
(dataShareHelper as dataShare.DataShareHelper).normalizeUri(uri, (err: BusinessError, data: string) => {
if (err !== undefined) {
console.info("normalizeUri failed, error message : " + err);
} else {
console.info("normalizeUri = " + data);
}
});
}
normalizeUri
normalizeUri(uri: string): Promise<string>
Normalizes a DataShare URI. The DataShare URI can be used only by the local device, but the normalized URI can be used across devices. This API uses a promise to return the result. Silent access is not supported currently.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI to normalize. |
Return value
Type | Description |
---|---|
Promise<string> | Promise used to return the result. If URI normalization is supported, the normalized URI is returned. Otherwise, null is returned. |
Example
import { BusinessError } from '@ohos.base'
let uri = ("datashare:///com.samples.datasharetest.DataShare");
if (dataShareHelper != undefined) {
(dataShareHelper as dataShare.DataShareHelper).normalizeUri(uri).then((data: string) => {
console.info("normalizeUri = " + data);
}).catch((err: BusinessError) => {
console.info("normalizeUri failed, error message : " + err);
});
}
denormalizeUri
denormalizeUri(uri: string, callback: AsyncCallback<string>): void
Denormalizes a URI. This API uses an asynchronous callback to return the result. Silent access is not supported currently.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI to denormalize. |
callback | AsyncCallback<string> | Yes | Callback invoked to return the result. If the operation is successful, err is undefined and data is the URI obtained. If the original URI is returned, denormalization is not required. If null is returned, denormalization is not supported. If the operation fails, err is an error object. |
Example
import { BusinessError } from '@ohos.base'
let uri = ("datashare:///com.samples.datasharetest.DataShare");
if (dataShareHelper != undefined) {
(dataShareHelper as dataShare.DataShareHelper).denormalizeUri(uri, (err: BusinessError, data: string) => {
if (err !== undefined) {
console.error("denormalizeUri failed, error message : " + err);
} else {
console.info("denormalizeUri = " + data);
}
});
}
denormalizeUri
denormalizeUri(uri: string): Promise<string>
Denormalizes a URI. This API uses a promise to return the result. Silent access is not supported currently.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI to denormalize. |
Return value
Type | Description |
---|---|
Promise<string> | Promise used to return the result. If the denormalization is successful, the URI obtained is returned. If no operation is required, the original URI is returned. If denormalization is not supported, null is returned. |
Example
import { BusinessError } from '@ohos.base'
let uri = ("datashare:///com.samples.datasharetest.DataShare");
if (dataShareHelper != undefined) {
(dataShareHelper as dataShare.DataShareHelper).denormalizeUri(uri).then((data: string) => {
console.info("denormalizeUri = " + data);
}).catch((err: BusinessError) => {
console.error("denormalizeUri failed, error message : " + err);
});
}
notifyChange
notifyChange(uri: string, callback: AsyncCallback<void>): void
Notifies the registered observer of data changes. This API uses an asynchronous callback to return the result. Silent access is not supported currently.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data. |
callback | AsyncCallback<void> | Yes | Callback invoked to return the result. If the observer is notified of the data changes, err is undefined. Otherwise, err is an error object. |
Example
let uri = ("datashare:///com.samples.datasharetest.DataShare");
if (dataShareHelper != undefined) {
(dataShareHelper as dataShare.DataShareHelper).notifyChange(uri, () => {
console.info("***** notifyChange *****");
});
}
notifyChange
notifyChange(uri: string): Promise<void>
Notifies the registered observer of data changes. This API uses a promise to return the result. Silent access is not supported currently.
System capability: SystemCapability.DistributedDataManager.DataShare.Consumer
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data. |
Return value
Type | Description |
---|---|
Promise<void> | Promise that returns no value. |
Example
let uri = ("datashare:///com.samples.datasharetest.DataShare");
if (dataShareHelper != undefined) {
(dataShareHelper as dataShare.DataShareHelper).notifyChange(uri);
}
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