import { Subject } from 'rxjs';
import * as i0 from "@angular/core";
export declare class HttpActivityService {
    observer: Subject<boolean>;
    statusChange: import("rxjs").Observable<boolean>;
    showIndicator(): void;
    hideIndicator(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<HttpActivityService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<HttpActivityService>;
}