harmony 鸿蒙@ohos.data.dataShare (Data Sharing)

2022-08-09
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@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.

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.

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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harmony 鸿蒙@ohos.data.dataShare (Data Sharing)

@ohos.data.dataShare (Data Sharing)

Modules to Import

dataShare.createDataShareHelper

dataShare.createDataShareHelper10+

dataShare.createDataShareHelper

DataShareHelperOptions10+

TemplateId10+

PublishedItem10+

RdbDataChangeNode10+

PublishedDataChangeNode10+

Template10+

OperationResult10+

DataShareHelper

on(‘dataChange’)

off(‘dataChange’)

addTemplate10+

delTemplate10+

on(‘rdbDataChange’)10+

off(‘rdbDataChange’)10+

on(‘publishedDataChange’)10+

off(‘publishedDataChange’)10+

publish10+

publish10+

publish10+

getPublishedData10+

getPublishedData10+

insert

insert

delete

delete

query

query

update

update

batchInsert

batchInsert

normalizeUri

normalizeUri

denormalizeUri

denormalizeUri

notifyChange

notifyChange

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dataShare.createDataShareHelper¹⁰⁺

DataShareHelperOptions¹⁰⁺

TemplateId¹⁰⁺

PublishedItem¹⁰⁺

RdbDataChangeNode¹⁰⁺

PublishedDataChangeNode¹⁰⁺

Template¹⁰⁺

OperationResult¹⁰⁺

addTemplate¹⁰⁺

delTemplate¹⁰⁺

on(‘rdbDataChange’)¹⁰⁺

off(‘rdbDataChange’)¹⁰⁺

on(‘publishedDataChange’)¹⁰⁺

off(‘publishedDataChange’)¹⁰⁺

publish¹⁰⁺

publish¹⁰⁺

publish¹⁰⁺

getPublishedData¹⁰⁺

getPublishedData¹⁰⁺