DataAbilityHelper
NOTE
The initial APIs of this module are supported since API version 7. Newly added APIs will be marked with a superscript to indicate their earliest API version.
Modules to Import
import featureAbility from '@ohos.ability.featureAbility'
import ohos_data_ability from '@ohos.data.dataability'
import ohos_data_rdb from '@ohos.data.rdb'
DataAbilityHelper.openFile
openFile(uri: string, mode: string, callback: AsyncCallback<number>): void
Opens a file with a specified URI. This API uses an asynchronous callback to return the result.
System capability: SystemCapability.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the file to open. |
mode | string | Yes | Mode for opening the file. The value can be rwt. |
callback | AsyncCallback<number> | Yes | Callback used to return the file descriptor. |
Example
import featureAbility from '@ohos.ability.featureAbility'
var DAHelper = featureAbility.acquireDataAbilityHelper(
"dataability:///com.example.DataAbility"
);
var mode = "rwt";
DAHelper.openFile(
"dataability:///com.example.DataAbility",
mode,
(err) => {
console.info("==========================>Called=======================>");
});
DataAbilityHelper.openFile
openFile(uri: string, mode: string): Promise<number>
Opens a file with a specified URI. This API uses a promise to return the result.
System capability: SystemCapability.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the file to open. |
mode | string | Yes | Mode for opening the file. The value can be rwt. |
Return value
Type | Description |
---|---|
Promise<number> | Promise used to return the file descriptor. |
Example
import featureAbility from '@ohos.ability.featureAbility'
var DAHelper = featureAbility.acquireDataAbilityHelper(
"dataability:///com.example.DataAbility"
);
var mode = "rwt";
DAHelper.openFile(
"dataability:///com.example.DataAbility",
mode).then((data) => {
console.info("==========================>openFileCallback=======================>");
});
DataAbilityHelper.on
on(type: 'dataChange', uri: string, callback: AsyncCallback<void>): void
Registers an observer to observe data specified by a given URI. This API uses an asynchronous callback to return the result.
System capability: SystemCapability.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
type | string | Yes | Type of the event to observe. The value is dataChange. |
uri | string | Yes | URI of the data. |
callback | AsyncCallback<void> | Yes | Callback invoked when the data is changed. |
Example
import featureAbility from '@ohos.ability.featureAbility'
var helper = featureAbility.acquireDataAbilityHelper(
"dataability:///com.example.DataAbility"
);
function onChangeNotify() {
console.info("==========================>onChangeNotify=======================>");
};
helper.on(
"dataChange",
"dataability:///com.example.DataAbility",
onChangeNotify
)
DataAbilityHelper.off
off(type: 'dataChange', uri: string, callback?: AsyncCallback<void>): void
Unregisters the observer used to observe data specified by a given URI. This API uses an asynchronous callback to return the result.
System capability: SystemCapability.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
type | string | Yes | Type of the event to observe. The value is dataChange. |
uri | string | Yes | URI of the data. |
callback | AsyncCallback<void> | No | Callback used to return the result. |
Example
import featureAbility from '@ohos.ability.featureAbility'
var helper = featureAbility.acquireDataAbilityHelper(
"dataability:///com.example.DataAbility"
);
function onChangeNotify() {
console.info("==========================>onChangeNotify=======================>");
};
helper.off(
"dataChange",
"dataability:///com.example.DataAbility",
)
helper.off(
"dataChange",
"dataability:///com.example.DataAbility",
onChangeNotify
)
DataAbilityHelper.getType
getType(uri: string, callback: AsyncCallback<string>): void
Obtains the MIME type of the data specified by a given URI. This API uses an asynchronous callback to return the result.
System capability: SystemCapability.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data. |
callback | AsyncCallback<string> | Yes | Callback used to return the MIME type. |
Example
import featureAbility from '@ohos.ability.featureAbility'
var DAHelper = featureAbility.acquireDataAbilityHelper(
"dataability:///com.example.DataAbility"
);
DAHelper.getType(
"dataability:///com.example.DataAbility",
(err, data) => {
console.info("==========================>Called=======================>");
});
DataAbilityHelper.getType
getType(uri: string): Promise<string>
Obtains the MIME type of the data specified by a given URI. This API uses a promise to return the result.
System capability: SystemCapability.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data. |
Return value
Type | Description |
---|---|
Promise<string> | Promise used to return the MIME type. |
Example
import featureAbility from '@ohos.ability.featureAbility'
var DAHelper = featureAbility.acquireDataAbilityHelper(
"dataability:///com.example.DataAbility"
);
DAHelper.getType(
"dataability:///com.example.DataAbility"
).then((data) => {
console.info("==========================>getTypeCallback=======================>");
});
DataAbilityHelper.getFileTypes
getFileTypes(uri: string, mimeTypeFilter: string, callback: AsyncCallback<Array<string>>): void
Obtains the supported MIME types of a specified file. This API uses an asynchronous callback to return the result.
System capability: SystemCapability.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the file. |
mimeTypeFilter | string | Yes | MIME type of the file. |
callback | AsyncCallback<Array<string>> | Yes | Callback used to return the supported MIME types. |
Example
import featureAbility from '@ohos.ability.featureAbility'
var DAHelper = featureAbility.acquireDataAbilityHelper(
"dataability:///com.example.DataAbility"
);
DAHelper.getFileTypes(
"dataability:///com.example.DataAbility",
"image/*",
(err, data) => {
console.info("==========================>Called=======================>");
});
DataAbilityHelper.getFileTypes
getFileTypes(uri: string, mimeTypeFilter: string): Promise<Array<string>>
Obtains the supported MIME types of a specified file. This API uses a promise to return the result.
System capability: SystemCapability.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the file. |
mimeTypeFilter | string | Yes | MIME type of the file. |
Return value
Type | Description |
---|---|
Promise<Array<string>> | Promise used to return the supported MIME types. |
Example
import featureAbility from '@ohos.ability.featureAbility'
var DAHelper = featureAbility.acquireDataAbilityHelper(
"dataability:///com.example.DataAbility"
);
DAHelper.getFileTypes(
"dataability:///com.example.DataAbility",
"image/*"
).then((data) => {
console.info("==========================>getFileTypesCallback=======================>");
});
DataAbilityHelper.normalizeUri
normalizeUri(uri: string, callback: AsyncCallback<string>): void
Converts the URI that refers to a Data ability into a normalized URI. This API uses an asynchronous callback to return the result.
System capability: SystemCapability.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI object to normalize. |
callback | AsyncCallback<string> | Yes | Callback used to return the normalized URI object if the Data ability supports URI normalization. If the Data ability does not support URI normalization, null is returned. |
Example
import featureAbility from '@ohos.ability.featureAbility'
var DAHelper = featureAbility.acquireDataAbilityHelper(
"dataability:///com.example.DataAbility"
);
DAHelper.normalizeUri(
"dataability:///com.example.DataAbility",
(err, data) => {
console.info("==========================>Called=======================>");
});
DataAbilityHelper.normalizeUri
normalizeUri(uri: string): Promise<string>
Converts the URI that refers to a Data ability into a normalized URI. This API uses a promise to return the result.
System capability: SystemCapability.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI object to normalize. |
Return value
Type | Description |
---|---|
Promise<string> | Promise used to return the normalized URI object if the Data ability supports URI normalization. If the Data ability does not support URI normalization, null is returned. |
Example
import featureAbility from '@ohos.ability.featureAbility'
var DAHelper = featureAbility.acquireDataAbilityHelper(
"dataability:///com.example.DataAbility"
);
DAHelper.normalizeUri(
"dataability:///com.example.DataAbility",
).then((data) => {
console.info("==========================>normalizeUriCallback=======================>");
});
DataAbilityHelper.denormalizeUri
denormalizeUri(uri: string, callback: AsyncCallback<string>): void
Converts a normalized URI generated by DataAbilityHelper.normalizeUri(uri: string, callback: AsyncCallback<string>) to a denormalized one. This API uses an asynchronous callback to return the result.
System capability: SystemCapability.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI object to normalize. |
callback | AsyncCallback<string> | Yes | Callback used to return the denormalized URI object. |
Example
import featureAbility from '@ohos.ability.featureAbility'
var DAHelper = featureAbility.acquireDataAbilityHelper(
"dataability:///com.example.DataAbility"
);
DAHelper.denormalizeUri(
"dataability:///com.example.DataAbility",
(err, data) => {
console.info("==========================>Called=======================>");
});
DataAbilityHelper.denormalizeUri
denormalizeUri(uri: string): Promise<string>
Converts a normalized URI generated by DataAbilityHelper.normalizeUri(uri: string) to a denormalized one. This API uses a promise to return the result.
System capability: SystemCapability.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI object to normalize. |
Return value
Type | Description |
---|---|
Promise<string> | Promise used to return the denormalized URI object. |
Example
import featureAbility from '@ohos.ability.featureAbility'
var DAHelper = featureAbility.acquireDataAbilityHelper(
"dataability:///com.example.DataAbility"
);
DAHelper.denormalizeUri(
"dataability:///com.example.DataAbility",
).then((data) => {
console.info("==========================>denormalizeUriCallback=======================>");
});
DataAbilityHelper.notifyChange
notifyChange(uri: string, callback: AsyncCallback<void>): void
Notifies the registered observer of a change to the data specified by the URI. This API uses an asynchronous callback to return the result.
System capability: SystemCapability.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data. |
callback | AsyncCallback<void> | Yes | Callback used to return the result. |
Example
import featureAbility from '@ohos.ability.featureAbility'
var helper = featureAbility.acquireDataAbilityHelper(
"dataability:///com.example.DataAbility"
);
helper.notifyChange(
"dataability:///com.example.DataAbility",
(err) => {
console.info("==========================>Called=======================>");
});
DataAbilityHelper.notifyChange
notifyChange(uri: string): Promise<void>
Notifies the registered observer of a change to the data specified by the URI. This API uses a promise to return the result.
System capability: SystemCapability.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data. |
Return value
Type | Description |
---|---|
Promise<void> | Promise used to return the result. |
Example
import featureAbility from '@ohos.ability.featureAbility'
var DAHelper = featureAbility.acquireDataAbilityHelper(
"dataability:///com.example.DataAbility"
);
DAHelper.notifyChange(
"dataability:///com.example.DataAbility",
).then(() => {
console.info("==========================>notifyChangeCallback=======================>");
});
DataAbilityHelper.insert
insert(uri: string, valuesBucket: rdb.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.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data to insert. |
valuesBucket | rdb.ValuesBucket | Yes | Data record to insert. If this parameter is null, a blank row will be inserted. |
callback | AsyncCallback<number> | Yes | Callback used to return the index of the inserted data record. |
Example
import featureAbility from '@ohos.ability.featureAbility'
var DAHelper = featureAbility.acquireDataAbilityHelper(
"dataability:///com.example.DataAbility"
);
const valueBucket = {
"name": "rose",
"age": 22,
"salary": 200.5,
"blobType": u8,
}
DAHelper.insert(
"dataability:///com.example.DataAbility",
valueBucket,
(err, data) => {
console.info("==========================>Called=======================>");
});
DataAbilityHelper.insert
insert(uri: string, valuesBucket: rdb.ValuesBucket): Promise<number>
Inserts a single data record into the database. This API uses a promise to return the result.
System capability: SystemCapability.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data to insert. |
valuesBucket | rdb.ValuesBucket | Yes | Data record to insert. If this parameter is null, a blank row will be inserted. |
Return value
Type | Description |
---|---|
Promise<number> | Promise used to return the index of the inserted data record. |
Example
import featureAbility from '@ohos.ability.featureAbility'
var DAHelper = featureAbility.acquireDataAbilityHelper(
"dataability:///com.example.DataAbility"
);
const valueBucket = {
"name": "rose1",
"age": 221,
"salary": 20.5,
"blobType": u8,
}
DAHelper.insert(
"dataability:///com.example.DataAbility",
valueBucket
).then((data) => {
console.info("==========================>insertCallback=======================>");
});
DataAbilityHelper.batchInsert
batchInsert(uri: string, valuesBuckets: Array<rdb.ValuesBucket>, callback: AsyncCallback<number>): void
Inserts multiple data records into the database. This API uses an asynchronous callback to return the result.
System capability: SystemCapability.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data to insert. |
valuesBucket | Array<rdb.ValuesBucket> | Yes | Data records to insert. |
callback | AsyncCallback<number> | Yes | Callback used to return the number of inserted data records. |
Example
import featureAbility from '@ohos.ability.featureAbility'
var DAHelper = featureAbility.acquireDataAbilityHelper(
"dataability:///com.example.DataAbility"
);
var cars = new Array({"name": "roe11", "age": 21, "salary": 20.5, "blobType": u8,},
{"name": "roe12", "age": 21, "salary": 20.5, "blobType": u8,},
{"name": "roe13", "age": 21, "salary": 20.5, "blobType": u8,})
DAHelper.batchInsert(
"dataability:///com.example.DataAbility",
cars,
(err, data) => {
console.info("==========================>Called=======================>");
});
DataAbilityHelper.batchInsert
batchInsert(uri: string, valuesBuckets: Array<rdb.ValuesBucket>): Promise<number>
Inserts multiple data records into the database. This API uses a promise to return the result.
System capability: SystemCapability.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data to insert. |
valuesBucket | Array<rdb.ValuesBucket> | Yes | Data record to insert. |
Return value
Type | Description |
---|---|
Promise<number> | Promise used to return the number of inserted data records. |
Example
import featureAbility from '@ohos.ability.featureAbility'
var DAHelper = featureAbility.acquireDataAbilityHelper(
"dataability:///com.example.DataAbility"
);
var cars = new Array({"name": "roe11", "age": 21, "salary": 20.5, "blobType": u8,},
{"name": "roe12", "age": 21, "salary": 20.5, "blobType": u8,},
{"name": "roe13", "age": 21, "salary": 20.5, "blobType": u8,})
DAHelper.batchInsert(
"dataability:///com.example.DataAbility",
cars
).then((data) => {
console.info("==========================>batchInsertCallback=======================>");
});
DataAbilityHelper.delete
delete(uri: string, predicates: dataAbility.DataAbilityPredicates, 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.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data to delete. |
valuesBucket | dataAbility.DataAbilityPredicates | Yes | Filter criteria. You should define the processing logic when this parameter is null. |
callback | AsyncCallback<number> | Yes | Callback used to return the number of deleted data records. |
Example
import featureAbility from '@ohos.ability.featureAbility'
import ohos_data_ability from '@ohos.data.dataability'
var DAHelper = featureAbility.acquireDataAbilityHelper(
"dataability:///com.example.DataAbility"
);
let da = new ohos_data_ability.DataAbilityPredicates()
DAHelper.delete(
"dataability:///com.example.DataAbility",
da,
(err, data) => {
console.info("==========================>Called=======================>");
});
DataAbilityHelper.delete
delete(uri: string, predicates: dataAbility.DataAbilityPredicates): Promise<number>
Deletes one or more data records from the database. This API uses a promise to return the result.
System capability: SystemCapability.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data to delete. |
valuesBucket | dataAbility.DataAbilityPredicates | Yes | Filter criteria. You should define the processing logic when this parameter is null. |
Return value
Type | Description |
---|---|
Promise<number> | Promise used to return the number of deleted data records. |
Example
import featureAbility from '@ohos.ability.featureAbility'
var DAHelper = featureAbility.acquireDataAbilityHelper(
"dataability:///com.example.DataAbility"
);
let da = new ohos_data_ability.DataAbilityPredicates()
DAHelper.delete(
"dataability:///com.example.DataAbility",
da
).then((data) => {
console.info("==========================>deleteCallback=======================>");
});
DataAbilityHelper.update
update(uri: string, valuesBucket: rdb.ValuesBucket, predicates: dataAbility.DataAbilityPredicates, callback: AsyncCallback<number>): void
Updates data records in the database. This API uses an asynchronous callback to return the result.
System capability: SystemCapability.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data to update. |
valuesBucket | rdb.ValuesBucket | Yes | New values. |
predicates | dataAbility.DataAbilityPredicates | Yes | Filter criteria. You should define the processing logic when this parameter is null. |
callback | AsyncCallback<number> | Yes | Callback used to return the number of updated data records. |
Example
import featureAbility from '@ohos.ability.featureAbility'
import ohos_data_ability from '@ohos.data.dataability'
var DAHelper = featureAbility.acquireDataAbilityHelper(
"dataability:///com.example.DataAbility"
);
const va = {
"name": "roe1",
"age": 21,
"salary": 20.5,
"blobType": u8,
}
let da = new ohos_data_ability.DataAbilityPredicates()
DAHelper.update(
"dataability:///com.example.DataAbility",
va,
da,
(err, data) => {
console.info("==========================>Called=======================>");
});
DataAbilityHelper.update
update(uri: string, valuesBucket: rdb.ValuesBucket, predicates: dataAbility.DataAbilityPredicates): Promise<number>
Updates data records in the database. This API uses a promise to return the result.
System capability: SystemCapability.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data to update. |
valuesBucket | rdb.ValuesBucket | Yes | New values. |
predicates | dataAbility.DataAbilityPredicates | Yes | Filter criteria. You should define the processing logic when this parameter is null. |
Return value
Type | Description |
---|---|
Promise<number> | Promise used to return the number of updated data records. |
Example
import featureAbility from '@ohos.ability.featureAbility'
import ohos_data_ability from '@ohos.data.dataability'
var DAHelper = featureAbility.acquireDataAbilityHelper(
"dataability:///com.example.DataAbility"
);
const va = {
"name": "roe1",
"age": 21,
"salary": 20.5,
"blobType": u8,
}
let da = new ohos_data_ability.DataAbilityPredicates()
DAHelper.update(
"dataability:///com.example.DataAbility",
va,
da
).then((data) => {
console.info("==========================>updateCallback=======================>");
});
DataAbilityHelper.query
query(uri: string, columns: Array<string>, predicates: dataAbility.DataAbilityPredicates, callback: AsyncCallback<ResultSet>): void
Queries data in the database. This API uses an asynchronous callback to return the result.
System capability: SystemCapability.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data to query. |
columns | rdb.ValuesBucket | Yes | Columns to query. If this parameter is null, all columns will be queried. |
predicates | dataAbility.DataAbilityPredicates | Yes | Filter criteria. You should define the processing logic when this parameter is null. |
callback | AsyncCallback<ResultSet> | Yes | Callback used to return the data queried. |
Example
import featureAbility from '@ohos.ability.featureAbility'
import ohos_data_ability from '@ohos.data.dataability'
var DAHelper = featureAbility.acquireDataAbilityHelper(
"dataability:///com.example.DataAbility"
);
var cars=new Array("value1", "value2", "value3", "value4");
let da = new ohos_data_ability.DataAbilityPredicates()
DAHelper.query(
"dataability:///com.example.DataAbility",
cars,
da,
(err, data) => {
console.info("==========================>Called=======================>");
});
DataAbilityHelper.query
query(uri: string, columns: Array<string>, predicates: dataAbility.DataAbilityPredicates): Promise<ResultSet>
Queries data in the database. This API uses a promise to return the result.
System capability: SystemCapability.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the data to query. |
columns | rdb.ValuesBucket | Yes | Columns to query. If this parameter is null, all columns will be queried. |
predicates | dataAbility.DataAbilityPredicates | Yes | Filter criteria. You should define the processing logic when this parameter is null. |
Return value
Type | Description |
---|---|
Promise<ResultSet> | Promise used to return the data queried. |
Example
import featureAbility from '@ohos.ability.featureAbility'
import ohos_data_ability from '@ohos.data.dataability'
var DAHelper = featureAbility.acquireDataAbilityHelper(
"dataability:///com.example.DataAbility"
);
var cars=new Array("value1", "value2", "value3", "value4");
let da = new ohos_data_ability.DataAbilityPredicates()
DAHelper.query(
"dataability:///com.example.DataAbility",
cars,
da
).then((data) => {
console.info("==========================>queryCallback=======================>");
});
DataAbilityHelper.call
call(uri: string, method: string, arg: string, extras: PacMap): Promise<PacMap>
Calls the extended API of the Data ability. This API uses a promise to return the result.
System capability: SystemCapability.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the Data ability. Example: "dataability:///com.example.xxx.xxxx" |
method | string | Yes | Name of the API to call. |
arg | string | Yes | Parameter to pass. |
extras | PacMap | Yes | Key-value pair parameter. |
Return value
Type | Description |
---|---|
Promise<PacMap> | Promise used to return the result. |
Example
import featureAbility from '@ohos.ability.featureAbility';
let dataAbilityHelper = featureAbility.acquireDataAbilityHelper("dataability:///com.example.jsapidemo.UserDataAbility");
dataAbilityHelper.call("dataability:///com.example.jsapidemo.UserDataAbility", "method", "arg", {"key1":"value1"}).then((data) => {
console.info('Operation succeeded: ' + data);
}).catch((error) => {
console.error('Operation failed. Cause: ' + error);
});
DataAbilityHelper.call
call(uri: string, method: string, arg: string, extras: PacMap, callback: AsyncCallback<PacMap>): void
Calls the extended API of the Data ability. This API uses an asynchronous callback to return the result.
System capability: SystemCapability.Ability.AbilityRuntime.FAModel
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
uri | string | Yes | URI of the Data ability. Example: "dataability:///com.example.xxx.xxxx" |
method | string | Yes | Name of the API to call. |
arg | string | Yes | Parameter to pass. |
extras | PacMap | Yes | Key-value pair parameter. |
callback | AsyncCallback<PacMap> | Yes | Callback used to return the result. |
Example
import featureAbility from '@ohos.ability.featureAbility';
let dataAbilityHelper = featureAbility.acquireDataAbilityHelper("dataability:///com.example.jsapidemo.UserDataAbility");
dataAbilityHelper.call("dataability:///com.example.jsapidemo.UserDataAbility", "method", "arg", {"key1":"value1"}, (err, data) => {
if (err) {
console.error('Operation failed. Cause: ' + err);
return;
}
console.info('Operation succeeded: ' + data);
});
PacMap
Name | Type | Mandatory | Description |
---|---|---|---|
[key: string] | number | string | boolean | Array<string | number | boolean> | null | Yes | Data stored in key-value pairs. |