我一直在开发一个Android应用程序来发出Eddystone信标。 我正在使用IntentService开始广告信标。调用startAdvertising函数后Intent Service停止，但我设置了一个每X分钟触发一次的警报。因此，在X分钟后，我再次呼叫stopAdvertising然后再启动广告。我将AdvertiseCallback设置为静态，因此每次都有相同的clientIf = 5。这可以正常工作，但就像大约每隔X * 23分钟一样，我得到DeadObjectException。
1950-1950/com.ppp.beaconbroadcasterservice.beaconemitterbackground D/AlarmReceiver: Alarm triggered
07-27 18:02:12.017 1950-1950/com.ppp.beaconbroadcasterservice.beaconemitterbackground D/BeaconEmitter: Data prepared to be advertised : Prefix - 007B Device token - 79b83b18f551c2aa Time token - 95feed22db47
07-27 18:02:12.110 1950-1966/com.ppp.beaconbroadcasterservice.beaconemitterbackground D/BluetoothLeAdvertiser: onClientRegistered() - status=0 clientIf=5
07-27 18:10:48.195 1950-1950/com.ppp.beaconbroadcasterservice.beaconemitterbackground D/AlarmReceiver: Alarm triggered
07-27 18:10:48.207 1950-1950/com.ppp.beaconbroadcasterservice.beaconemitterbackground D/BeaconEmitter: Data prepared to be advertised : Prefix - 007B Device token - 79b83b18f551c2aa Time token - b8b23f4ef347
07-27 18:10:48.276 1950-21988/com.ppp.beaconbroadcasterservice.beaconemitterbackground D/BluetoothLeAdvertiser: onClientRegistered() - status=0 clientIf=5
07-27 18:10:50.287 1950-1950/com.ppp.beaconbroadcasterservice.beaconemitterbackground E/BluetoothLeAdvertiser: remote exception when unregistering
android.os.DeadObjectException
at android.os.BinderProxy.transactNative(Native Method)
at android.os.BinderProxy.transact(Binder.java:496)
at android.bluetooth.IBluetoothGatt$Stub$Proxy.unregisterClient(IBluetoothGatt.java:866)
at android.bluetooth.le.BluetoothLeAdvertiser$AdvertiseCallbackWrapper.startRegisteration(BluetoothLeAdvertiser.java:278)
at android.bluetooth.le.BluetoothLeAdvertiser.startAdvertising(BluetoothLeAdvertiser.java:141)
at android.bluetooth.le.BluetoothLeAdvertiser.startAdvertising(BluetoothLeAdvertiser.java:90)
at com.ppp.beaconbroadcasterservice.beaconemitterbackground.BeaconEmitter.rotateBeaconID(BeaconEmitter.java:309)
at com.ppp.beaconbroadcasterservice.beaconemitterbackground.AlarmReceiver.onReceive(AlarmReceiver.java:32)
at android.app.ActivityThread.handleReceiver(ActivityThread.java:2662)
at android.app.ActivityThread.access$1700(ActivityThread.java:160)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1397)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5466)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:984)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)
07-27 18:10:50.542 1950-1950/com.ppp.beaconbroadcasterservice.beaconemitterbackground W/BluetoothReceiver: Bluetooth is OFF. Stop emitting beacon service. Also stopping the scheduled alarm
07-27 18:10:54.114 1950-1950/com.ppp.beaconbroadcasterservice.beaconemitterbackground W/BluetoothReceiver: Bluetooth is OFF. Stop emitting beacon service. Also stopping the scheduled alarm
07-27 18:10:58.712 1950-1950/com.ppp.beaconbroadcasterservice.beaconemitterbackground D/BluetoothReceiver: Bluetooth ON. Checking for compatibility
07-27 18:10:58.717 1950-1950/com.ppp.beaconbroadcasterservice.beaconemitterbackground D/BluetoothReceiver: Bluetooth ON and compatible. Start emitting beacon service. Also scheduling alarm
07-27 18:10:58.763 1950-4939/com.ppp.beaconbroadcasterservice.beaconemitterbackground D/BeaconEmitter: Data prepared to be advertised : Prefix - 007B Device token - 79b83b18f551c2aa Time token - b8b23f4ef347
07-27 18:10:58.775 1950-21988/com.ppp.beaconbroadcasterservice.beaconemitterbackground D/BluetoothLeAdvertiser: onClientRegistered() - status=0 clientIf=5
07-27 18:17:35.334 1950-1950/com.ppp.beaconbroadcasterservice.beaconemitterbackground D/AlarmReceiver: Alarm triggered
07-27 18:17:35.343 1950-1950/com.ppp.beaconbroadcasterservice.beaconemitterbackground D/BeaconEmitter: Data prepared to be advertised : Prefix - 007B Device token - 79b83b18f551c2aa Time token - e2697456de83
07-27 18:17:35.391 1950-11251/com.ppp.beaconbroadcasterservice.beaconemitterbackground D/BluetoothLeAdvertiser: onClientRegistered() - status=0 clientIf=5
因此，此例外不会影响广告，但它似乎会关闭蓝牙，然后再次打开。 几乎每隔X * 23分钟就会发生这种情况。我用X = 1分钟和5分钟的交叉检查。
有什么理由吗？如何避免这种异常？
在警报管理员的帮助下，每5分钟重复一部分代码。
/**
* The rotation part which will be executed every 5 minutes
*/
public void rotateBeaconID()
{
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
mBluetoothLeAdvertiser = mBluetoothAdapter.getBluetoothLeAdvertiser();
//Change the advertise data to reflect the new timetoken in the beacon packet
mAdvertiseData = setAdvertiseData();
//Change the advertising settings
mAdvertiseSettings = setAdvertiseSettings();
//Stop the current advertisement
mBluetoothLeAdvertiser.stopAdvertising(mAdvertiseCallback);
//Start advertising again with the new beacon packet
mBluetoothLeAdvertiser.startAdvertising(mAdvertiseSettings, mAdvertiseData, mAdvertiseCallback);
//Write the logs to a file in the device
LogRotate.writeLogToFile();
}
此函数是IntentService类的一种方法。 感谢
答案 0 :(得分：0)
根据您的描述，您的IntentService似乎正在启动startAdvertising所需的所有组件。这些对象存储在内存中，属于一旦广告方法完成就被销毁的IntentService（IntentService用于执行短任务，并在完成时自毁）。
在x分钟后，警报会唤醒，并尝试使用IntentService启动的资源停止广告...但现在您遇到了问题：
Intent服务不再存在，因为它与所有资源一起被销毁，因此警报启动任务正在尝试调用DeadObject，从而导致DeadObjectException。