启动ServiceAbility
ServiceAbility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章节。
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。
import featureAbility from '@ohos.ability.featureAbility'
import Want from '@ohos.app.ability.Want';
import promptAction from '@ohos.promptAction';
import hilog from '@ohos.hilog';
const LOG_DOMAIN: number = 0x0000;
const LOG_TAG: string = 'startServiceAbility';
const startServiceAbility = async () => {
try {
hilog.info(LOG_DOMAIN, LOG_TAG, 'Begin to start ability');
let want: Want = {
bundleName: 'com.samples.famodelabilitydevelop',
abilityName: 'com.samples.famodelabilitydevelop.ServiceAbility'
};
await featureAbility.startAbility({ want });
promptAction.showToast({
message: 'start service success'
});
hilog.info(LOG_DOMAIN, LOG_TAG, 'Start ability succeed');
} catch (error) {
hilog.info(LOG_DOMAIN, LOG_TAG, 'Start ability failed with ' + error);
}
}
执行上述代码后,Ability将通过startAbility()
方法来启动ServiceAbility。
-
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。
-
如果ServiceAbility正在运行,则系统会直接回调ServiceAbility的onCommand()方法来启动ServiceAbility。