在Android O及更高版本上，后台扫描BLE设备的行为发生了变化。在BoundService中进行扫描时，需要使用startForegroundService()方法启动服务，并在服务启动后调用startForeground()方法以显示一个前台通知，以确保服务在解绑时不会停止。

以下是一个示例代码，演示如何在BoundService中使用AltBeacon库进行BLE扫描，并在解绑时停止扫描：

首先，在AndroidManifest.xml文件中添加以下权限和服务声明：

    ...
    

然后，创建一个名为MyBeaconService的BoundService类，如下所示：

import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.os.Build;
import android.os.Handler;
import android.os.IBinder;
import android.os.RemoteException;

import androidx.annotation.Nullable;
import androidx.core.app.NotificationCompat;
import androidx.core.content.ContextCompat;

import org.altbeacon.beacon.Beacon;
import org.altbeacon.beacon.BeaconConsumer;
import org.altbeacon.beacon.BeaconManager;
import org.altbeacon.beacon.RangeNotifier;
import org.altbeacon.beacon.Region;

import java.util.Collection;

public class MyBeaconService extends Service implements BeaconConsumer {
    private static final int NOTIFICATION_ID = 1;
    private static final String CHANNEL_ID = "BeaconServiceChannel";
    private BeaconManager beaconManager;

    @Override
    public void onCreate() {
        super.onCreate();
        beaconManager = BeaconManager.getInstanceForApplication(this);
        beaconManager.bind(this);
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        startForeground(NOTIFICATION_ID, createNotification());
        return START_STICKY;
    }

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    public void onBeaconServiceConnect() {
        beaconManager.addRangeNotifier(new RangeNotifier() {
            @Override
            public void didRangeBeaconsInRegion(Collection beacons, Region region) {
                // 处理扫描到的Beacons
                for (Beacon beacon : beacons) {
                    // 处理beacon数据
                }
            }
        });

        try {
            beaconManager.startRangingBeaconsInRegion(new Region("myRegion", null, null, null));
        } catch (RemoteException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        beaconManager.unbind(this);
    }

    private Notification createNotification() {
        createNotificationChannel();

        Intent notificationIntent = new Intent(this, MainActivity.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);

        NotificationCompat.Builder builder = new NotificationCompat.Builder(this, CHANNEL_ID)
                .setContentTitle("Beacon Service")
                .setContentText("Scanning for beacons...")
                .setSmallIcon(R.drawable.ic_notification)
                .setContentIntent(pendingIntent);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            builder.setChannelId(CHANNEL_ID);
        }

        return builder.build();
    }

    private void createNotificationChannel() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            NotificationChannel serviceChannel = new NotificationChannel(
                    CHANNEL_ID,
                    "Beacon Service Channel",
                    NotificationManager.IMPORTANCE_DEFAULT
            );

            NotificationManager manager = getSystemService(NotificationManager.class);
            manager.createNotificationChannel(serviceChannel);
        }
    }
}

在上述示例中，MyBeaconService类继承自Service，并实现了BeaconConsumer接口。在onCreate()方法中，我们绑定了BeaconManager，并在onBeaconServiceConnect()回调中执行扫描操作。在onStartCommand()方法中，我们调用startForeground()方法以将服务设置为前台服务，并显示一个通知。在onDestroy()方法中，我们解绑了BeaconManager。

要使用此服务，请在您的Activity中绑定和解绑服务，如下所示：

import android.content