无法启动接收器：不允许启动服务意向;应用程序在后台 [英] Unable to start receiver : Not allowed to start service Intent ; App is in background

问题描述

因此，我制作了一个应用程序，只需单击按钮，即可使用警报管理器设置重复任务。

So I made an app that upon a button click sets up a repeating task using an Alarm Manager.

在创建时输入：

Intent alarmIntent = new Intent(this, AlarmReceiver.class);
servicePendingIntent = PendingIntent.getBroadcast(this, 0, alarmIntent, 0);

在按钮上单击：

alarmManager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);

    firingCal= Calendar.getInstance();
    firingCal.setTimeInMillis(System.currentTimeMillis());
    firingCal.set(Calendar.HOUR_OF_DAY, 1); // At the hour you want to fire the alarm
    firingCal.set(Calendar.MINUTE, 47); // alarm minute
    firingCal.set(Calendar.SECOND, 0); // and alarm second
    long intendedTime = firingCal.getTimeInMillis();

    long interval = 1000 * 60 * 1;


    alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, intendedTime, interval, servicePendingIntent);

在AlarmReceiver类中：

public void onReceive(Context context, Intent intent) {

    Intent myIntent = new Intent(context, WallpaperService.class);

    context.startService(myIntent);
    Log.d(TAG,"Am apelat serviciul");

    context.stopService(myIntent);

}

在WallpaperService类中，我只是发出一个get请求，然后设置墙纸。

And in the WallpaperService class I just make a get request and set an wallpaper.

public class WallpaperService extends Service {

String requestLink="";
boolean requestFinished = false;
public final String TAG = "Service";
public  static int SERVICE_ID = 1;

@Override
public void onCreate() {
    super.onCreate();
    Log.d(TAG,"Wallpaper Service started");
    Toast.makeText(WallpaperService.this,"Service started",Toast.LENGTH_LONG);
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {

    Log.d(TAG,"In onStartCommand");
    taskToBeRepeated();
    stopSelf();

    return START_STICKY;
}
.....
}

行为是，当我启动该应用程序并单击该按钮时，警报管理器在第一次启动时一切正常（在后台运行该应用程序）。第二次接收器触发时，我在磁贴中收到错误。更具体地说：

And the behaviour is that when I start the app and I click the button everything works well the first time the Alarm Manager fires ( With the app in the background). The second time the receiver gets triggered I get the error in the tile. To be more specific :

java.lang.RuntimeException：无法启动接收器com.example.dailywallpaper.AlarmReceiver：java.lang.IllegalStateException ：不允许启动服务意图{cmp = com.example.dailywallpaper / .WallpaperService}：应用程序在后台uid UidRecord {3e313bf u0a357 RCVR bg：+ 1m21s273ms空闲更改：未处理的进程：1 seq（0,0,0）}

java.lang.RuntimeException: Unable to start receiver com.example.dailywallpaper.AlarmReceiver: java.lang.IllegalStateException: Not allowed to start service Intent { cmp=com.example.dailywallpaper/.WallpaperService }: app is in background uid UidRecord{3e313bf u0a357 RCVR bg:+1m21s273ms idle change:uncached procs:1 seq(0,0,0)}

似乎是什么问题？为何先工作然后又给出错误？我该如何解决？

What seems to be the problem ? And why is working the first time and then it gives the error? How can I fix it ?

推荐答案

您需要阅读android官方文档，以了解在android 8及更高版本中使用后台服务或警报的策略，并适应您的应用

you need to read android official documentation about the policy of using background service or alarms in android 8 and above and adapt your app with this limitations.

我建议您仔细阅读这两篇文章：

I suggest you to read this two articles very carefully :

https://developer.android.com/guide/components/services

https://developer.android.com/about/versions / oreo / background

这篇关于无法启动接收器：不允许启动服务意向;应用程序在后台的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！