如何在Oreo上的背景中监视地理围栏？

Question

我遵循了本教程：https : //developer.android.com/training/location/geofencing，并且在Android <8上可以正常工作，但是在Oreo中，由于新的操作系统背景限制，我遇到了问题。

How can I get geofence transition triggers when app is in background?

I also tried to use a BroadcastReceiver instead of IntentService, but the result is the same.

Pending Intent:

private val geofencePendingIntent: PendingIntent by lazy {
    val intent = Intent(context, GeofenceBroadcastReceiver::class.java)
    intent.action = "com.example.GEOFENCE_TRANSITION"
    PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
}

Register geofence:

geofencingClient.addGeofences(request, geofencePendingIntent).run {
    addOnSuccessListener {
        Log.d(TAG, "Geofence added")
    }
    addOnFailureListener {
        Log.e(TAG, "Failed to create geofence")
    }
} 

Broadcast Receiver:

class GeofenceBroadcastReceiver : BroadcastReceiver() {
    override fun onReceive(p0: Context?, p1: Intent?) {
        Log.d(TAG, "onReceive")
    }
}

Receiver in Manifest:

<receiver android:name=".GeofenceBroadcastReceiver">
    <intent-filter>
        <action android:name="com.example.GEOFENCE_TRANSITION"/>
    </intent-filter>
</receiver>

Thanks

EDIT: IntentService version

Pending Intent:

private val geofencePendingIntent: PendingIntent by lazy {
    val intent = Intent(context, GeofenceIntentService::class.java)
    PendingIntent.getService(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
}

Intent Service:

class GeofenceIntentService : IntentService("GeofenceIntentService") {
    override fun onHandleIntent(p0: Intent?) {
        Log.d(TAG, "onHandleIntent")
    }
}

Service in Manifest:

<service android:name=".GeofenceIntentService"/>

Answer 1

在 Android 8 上，当您在后台实现地理围栏转换时，您应该每隔几分钟就会收到一个 Intent。

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请参阅： https: //developer.android.com/training/location/geofencing#java

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处理地理围栏转换\n当定位服务检测到用户已进入或退出地理围栏时，它会发出添加地理围栏请求中包含的 PendingIntent 中包含的 Intent。此意图由像 GeofenceTransitionsIntentService 这样的服务接收，该服务从意图中获取地理围栏事件，确定地理围栏转换的类型，并确定触发了哪个定义的地理围栏。然后它发送通知作为输出。

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注意：在 Android 8.0（API 级别 26）及更高版本上，如果应用程序在监控地理围栏时在后台运行，则设备每隔几分钟响应一次地理围栏事件。要了解如何使您的应用适应这些响应限制，请参阅后台位置限制。

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注册地理围栏服务后，它\xc2\xb4s仍然存在，您无需执行其他操作，只需检查 IntentService 中的特定 PendingIntent，排除设备重新启动时您需要重新注册地理围栏服务的情况。

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另请检查：https ://developer.android.com/about/versions/oreo/background-location-limits

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