应用程序关闭后 NativeScript 后台服务停止工作

Question

我的 nativescript 后台服务有问题。我想编写带有后台服务的应用程序。该服务必须始终运行在后台，即使应用程序将停止并关闭。

我用过nativescript-android-utils for android intent services, but the service stops working after application closes. I have also tried to register broadcast receiver according to this但结果是一样的：当应用程序关闭时，该服务也停止工作。

我想编写 gps 追踪器后台服务，这就是为什么我需要始终在后台运行ning 服务。

服务代码：

declare var com: any;
@JavaProxy("org.nativescript.PresleyApp.Test")
export class Test extends com.pip3r4o.android.app.IntentService {
    protected onHandleIntent(intent: android.content.Intent): void {
        geolocation.enableLocationRequest().then(function() {
            this.watchId = geolocation.watchLocation(
                (loc) => {
                    if (loc) {
                        const toast = Toast.makeText("Background Location: " + loc.latitude + " " + loc.longitude);
                        toast.show();
                        console.log("Background Location: " + loc.latitude + " " + loc.longitude);
                    }
                },
                (e) => {
                    console.log("Background watchLocation error: " + (e.message || e));
                },
                {
                    desiredAccuracy: Accuracy.high,
                    updateDistance: 0.1,
                    updateTime: 3000,
                    minimumUpdateTime: 100
                });
        }, (e) => {
            console.log("Background enableLocationRequest error: " + (e.message || e));
        });
    }
}

开始服务

const context = application.android.context;
const intent = new android.content.Intent();
intent.setClassName(context, "org.nativescript.PresleyApp.Test");
context.startService(intent);

Answer 1

这就是我的服务方式，

    import * as timer from "timer";

    @JavaProxy("com.nativescript.DataSyncService")
    class DataSyncService extends android.app.Service {

        private timerId: number;

        onBind(): android.os.IBinder {
            return null;
        }

        onCreate(): void {
            super.onCreate();

            if (!this.timerId) {
                this.timerId = timer.setInterval(()=> {
                   // Run this every 4 hrs
                }, (1000 * 60 * 60 * 4));
            }
        }

        onStartCommand(intent: android.content.Intent, flags: number, startId: number): number {
            return android.app.Service.START_STICKY;
        }

        onDestroy(): void {
            super.onDestroy();
            timer.clearInterval(this.timerId);
        }
    }

从 onStartCommand 返回 START_STICKY 使系统在进程 (app) 被终止时重新启动服务。

应用程序关闭后 NativeScript 后台服务停止工作

NativeScript background service stops working after app closes

android

background-service

nativescript

android-broadcastreceiver

angular2-nativescript