1# 启动ServiceAbility 2 3 4ServiceAbility的启动与其他Ability并无区别，应用开发者可以在PageAbility中通过featureAbility的startAbility接口拉起ServiceAbility，在ServiceAbility中通过particleAbility的startAbility接口拉起ServiceAbility。ServiceAbility的启动规则详见[组件启动规则](component-startup-rules.md)章节。 5 6 7如下示例展示了在PageAbility中通过startAbility启动bundleName为"com.example.myapplication"，abilityName为"ServiceAbility"的ServiceAbility的方法。启动FA模型的ServiceAbility时，需要在abilityName前拼接bundleName字符串。 8 9```ts 10import featureAbility from '@ohos.ability.featureAbility' 11import Want from '@ohos.app.ability.Want'; 12import promptAction from '@ohos.promptAction'; 13import hilog from '@ohos.hilog'; 14``` 15```ts 16const LOG_DOMAIN: number = 0x0000; 17const LOG_TAG: string = 'startServiceAbility'; 18const startServiceAbility = async () => { 19 try { 20 hilog.info(LOG_DOMAIN, LOG_TAG, 'Begin to start ability'); 21 let want: Want = { 22 bundleName: 'com.samples.famodelabilitydevelop', 23 abilityName: 'com.samples.famodelabilitydevelop.ServiceAbility' 24 }; 25 await featureAbility.startAbility({ want }); 26 promptAction.showToast({ 27 message: 'start service success' 28 }); 29 hilog.info(LOG_DOMAIN, LOG_TAG, 'Start ability succeed'); 30 } catch (error) { 31 hilog.info(LOG_DOMAIN, LOG_TAG, 'Start ability failed with ' + error); 32 } 33} 34``` 35 36 37执行上述代码后，Ability将通过[`startAbility()`](../reference/apis/js-apis-inner-application-uiAbilityContext.md#uiabilitycontextstartability)方法来启动ServiceAbility。 38 39 40- 如果ServiceAbility尚未运行，则系统会先调用onStart()来初始化ServiceAbility，再回调Service的onCommand()方法来启动ServiceAbility。 41 42- 如果ServiceAbility正在运行，则系统会直接回调ServiceAbility的onCommand()方法来启动ServiceAbility。 43