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+# 元能力子系统ChangeLog
+
+## cl.ability.1 应用组件启动规则变更
+
+元能力子系统应用组件启动规则在如下场景中存在变更:
+
+ - 应用位于后台启动应用组件
+ - 跨应用启动invisible应用组件
+ - 跨应用启动FA模型的serviceAbility与dataAbility
+ - 使用startAbilityByCall接口
+
+开发者需要根据以下说明对应用进行适配。
+
+
+**变更影响**
+
+若未适配新规则,在上述场景下将无法启动应用组件
+> **注意,启动应用组件是指一切启动或连接Ability的行为:**
+
1. 启动Ability,如使用startAbility、startServiceExtensionAbility、startAbilityByCall等接口。
+
2. 连接Ability,如使用connectAbility、connectServiceExtensionAbility、acquireDataAbilityHelper、createDataShareHelper等接口。
+
+**关键的接口/组件变更**
+
+ - 涉及的应用组件
+ - Stage模型
+ - Ability
+ - ServiceExtension
+ - DataShareExtension
+ - FA模型
+ - PageAbility
+ - ServiceAbility
+ - DataAbility
+ - 涉及接口
+ - Stage模型
+ - startAbility(want: Want, callback: AsyncCallback): void;
+ - startAbility(want: Want, options: StartOptions, callback: AsyncCallback): void;
+ - startAbility(want: Want, options?: StartOptions): Promise;
+ - startAbilityByCall(want: Want): Promise;
+ - startAbilityWithAccount(want: Want, accountId: number, callback: AsyncCallback): void;
+ - startAbilityWithAccount(want: Want, accountId: number, options: StartOptions, callback: AsyncCallback): void;
+ - startAbilityWithAccount(want: Want, accountId: number, options?: StartOptions): Promise;
+ - startAbilityForResult(want: Want, callback: AsyncCallback): void;
+ - startAbilityForResult(want: Want, options: StartOptions, callback: AsyncCallback): void;
+ - startAbilityForResult(want: Want, options?: StartOptions): Promise;
+ - startAbilityForResultWithAccount(want: Want, accountId: number, callback: AsyncCallback): void;
+ - startAbilityForResultWithAccount(want: Want, accountId: number, options: StartOptions, callback: AsyncCallback): void;
+ - startAbilityForResultWithAccount(want: Want, accountId: number, options?: StartOptions): Promise;
+ - startServiceExtensionAbility(want: Want, callback: AsyncCallback): void;
+ - startServiceExtensionAbility(want: Want): Promise;
+ - startServiceExtensionAbilityWithAccount(want: Want, accountId: number, callback: AsyncCallback): void;
+ - startServiceExtensionAbilityWithAccount(want: Want, accountId: number): Promise;
+ - stopServiceExtensionAbility(want: Want, callback: AsyncCallback): void;
+ - stopServiceExtensionAbility(want: Want): Promise;
+ - stopServiceExtensionAbilityWithAccount(want: Want, accountId: number, callback: AsyncCallback): void;
+ - stopServiceExtensionAbilityWithAccount(want: Want, accountId: number): Promise;
+ - connectAbility(want: Want, options: ConnectOptions): number;
+ - connectAbilityWithAccount(want: Want, accountId: number, options: ConnectOptions): number;
+ - createDataShareHelper(context: Context, uri: string, callback: AsyncCallback): void
+ - FA模型
+ - startAbility(parameter: StartAbilityParameter, callback: AsyncCallback): void;
+ - startAbility(parameter: StartAbilityParameter): Promise;
+ - startAbilityForResult(parameter: StartAbilityParameter, callback: AsyncCallback): void;
+ - startAbilityForResult(parameter: StartAbilityParameter): Promise;
+ - acquireDataAbilityHelper(uri: string): DataAbilityHelper;
+ - connectAbility(request: Want, options:ConnectOptions ): number;
+
+**适配指导**
+
+不同场景下的启动规则说明如下:
+ - **应用后台启动应用组件**
+ - OpenHarmony 3.2-beta3 版本规则:
+ - 应用位于后台时,启动应用组件不受任何限制。
+ - OpenHarmony 3.2-Release 版本新规则:
+ - 当应用位于后台时,启动应用组件需鉴权,需申请的权限如下:
+ - ```json
+ {
+ "name": "ohos.permission.START_ABILITIES_FROM_BACKGROUND",
+ "grantMode": "system_grant",
+ "availableLevel": "system_basic",
+ "provisionEnable": true,
+ "distributedSceneEnable": false
+ }
+ ```
+ > **注:**
+
1. 即使启动同应用的组件,也受该规则限制。
+
2. 对于API8以及之前的SDK,启动serviceAbility和dataAbility不受此规则限制。
+
+ - **跨应用启动invisible应用组件**
+ - OpenHarmony 3.2.beta3 版本规则:
+ - 对于APL为normal的应用,无法跨应用启动invisible的应用组件
+ - OpenHarmony 3.2-Release 版本新规则:
+ - 所有应用,若需要跨应用启动invisible的应用组件,需鉴权,需申请的权限如下:
+ - ```json
+ {
+ "name": "ohos.permission.START_INVISIBLE_ABILITY",
+ "grantMode": "system_grant",
+ "availableLevel": "system_core",
+ "provisionEnable": true,
+ "distributedSceneEnable": false
+ }
+ ```
+
+ - **跨应用启动FA模型的serviceAbility与dataAbility**
+
+ - OpenHarmony 3.2.beta3 版本规则:
+ - 可任意跨应用启动serviceAbility与dataAbility
+ - OpenHarmony 3.2-Release 版本新规则:
+ - serviceAbility与dataAbility的提供方应用需配置关联启动,否则无法被跨应用拉起。(普通应用无法配置关联启动)
+
+
+ - **startAbilityByCall接口**
+ - OpenHarmony 3.2.beta3 版本规则:
+ - 可任意进行Call调用
+ - OpenHarmony 3.2-Release 版本新规则:
+ - 不支持同应用startAbilityByCall调用
+ - 跨应用startAbilityByCall调用需鉴权,需申请的权限如下:
+
+ - ```json
+ {
+ "name": "ohos.permission.ABILITY_BACKGROUND_COMMUNICATION",
+ "grantMode": "system_grant",
+ "availableLevel": "system_basic",
+ "provisionEnable": true,
+ "distributedSceneEnable": false
+ }
+ ```
+ > **注:**
+
使用startAbilityByCall接口同时也受上述后台启动、跨应用启动invisible规则的限制。
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