Android O-旧的启动前台服务仍在工作吗? [英] Android O - Old start foreground service still working?

问题描述

因此，在Android O上，如果您希望每小时收到的位置更新不止几个，则需要将服务作为前台服务运行.

So, with Android O, you need to have your service running as a foreground service if you want to receive more than just a few location updates per hour.

我注意到启动前台服务的旧方法似乎可以在O上运行. 即

I noticed that the old method for starting a foreground service does seem to work on O. i.e.

startForeground(NOTIFICATION_ID, getNotification());

根据此处的行为更改指南: https://developer.android.com/preview/behavior-changes.html

According to the behaviour changes guide here: https://developer.android.com/preview/behavior-changes.html

NotificationManager.startServiceInForeground()方法启动前台服务.启动前台服务的旧方法不再起作用.

The NotificationManager.startServiceInForeground() method starts a foreground service. The old way to start a foreground service no longer works.

尽管新方法仅适用于O，但似乎旧方法仍然适用于O设备(无论是否针对O).

Though the new method only works when targeting O, it seems that the old method still seems to work on an O device whether targeting O or not.

修改 包括示例:

Google示例项目LocationUpdatesForegroundService实际上有一个有效的示例，您可以在其中直接看到问题. https://github.com/googlesamples/android-play-location/tree /master/LocationUpdatesForegroundService

The Google sample project LocationUpdatesForegroundService actually has a working example where you can see the issue first hand. https://github.com/googlesamples/android-play-location/tree/master/LocationUpdatesForegroundService

无论是针对API级别25进行定向和编译，还是针对O进行定向和编译(如此处指示:

The startForeground method seems to work without issue whether targeting and compiling against API level 25 OR targeting and compiling against O (as directed to here: https://developer.android.com/preview/migration.html#uya)

因此，要重现:

1. 按照上一链接所述配置应用程序gradle
2. 打开应用
3. 请求位置更新
4. 关闭应用程序(通过后退"按钮或主页"按钮)

服务在前台运行(通过通知阴影中的图标显示).即使在运行O的设备上，位置更新也会按预期(每10秒)进行.我在这里缺少什么?

Service is running in foreground (shown by icon in notification shade). Location updates are coming through as expected (every 10 seconds) even on a device running O. What I am missing here?

推荐答案

这对我有用.

1. 在活动"类中，使用 startForegroundService()而不是 startService()
启动服务

1. In Activity class, start service using startForegroundService() instead of startService()

    Intent myService = new Intent(this, MyService.class);

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        startForegroundService(myService);
    } else {
        startService(myService);
    }

1. 现在在 onStartCommand()中的Service类中执行以下操作

1. Now in Service class in onStartCommand() do as following

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    ......
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {

        Notification.Builder builder = new Notification.Builder(this, ANDROID_CHANNEL_ID)
                .setContentTitle(getString(R.string.app_name))
                .setContentText(text)
                .setAutoCancel(true);

        Notification notification = builder.build();
        startForeground(1, notification);

    } else {

        NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
                .setContentTitle(getString(R.string.app_name))
                .setContentText(text)
                .setPriority(NotificationCompat.PRIORITY_DEFAULT)
                .setAutoCancel(true);

        Notification notification = builder.build();

        startForeground(1, notification);
    }
    return START_NOT_STICKY;
}

注意:使用 Notification.Builder 代替 NotificationCompat.Builder 使其正常工作.仅在Notification.Builder中，您需要提供Channel ID，这是Android Oreo中的新功能.

Note: Using Notification.Builder instead of NotificationCompat.Builder made it work. Only in Notification.Builder you will need to provide Channel ID which is new feature in Android Oreo.

希望它能起作用！

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