Question

我正在使用rxandroidble使用autoconnect = true来持续监控来自传感器的数据。该应用程序会持续扫描以前连接的传感器。

即使手机未连接电源，传感器的数据监控和扫描也应持续整夜。

如果在晚上连接传感器，应用程序将保持整夜连接，即使它暂时断开连接。

但是，如果传感器在夜间断开6小时（因为我拉动了传感器的电池），然后我在早上重新连接传感器电池，手机似乎没有重新连接到传感器。

我经常在Android服务中每8秒扫描一次新传感器，但它不是WakefulService，也不是由WakefulIntent启动的。应该是吗？

知道会发生什么事吗？ rxandroidble是否设计为在这种情况下继续扫描传感器（混合设备连接，超出范围8小时，然后回到范围内）？或者我需要在断开连接后手动尝试重新连接，然后rxandroid将不断尝试重新连接。

这是我的扫描码：

    public boolean scanForDevices(boolean on){


    if(on){
        if (!mBluetoothAdapter.isEnabled()) {
            Log.e(TAG, "scanForDevices: bluetooth not enabled, scan failed" );
            return false; // bluetooth disabled
        }

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

            if (TheApplication.getInstance().checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                Log.e(TAG, "scanForDevices: ACCESS_COARSE_LOCATION permission not granted, scan failed" );
                return false; // App doesn't have permission granted
            }
        }

        if (isScanning()) {
            scanSubscription.unsubscribe();
        } else {

            scanSubscription = RxBleClientSingleton.getInstance().getRxBleClient().scanBleDevices()
                    .observeOn(AndroidSchedulers.mainThread())
                    .doOnError(this::onScanFailure)
                    .doOnUnsubscribe(this::clearSubscription)
                    .subscribe(this::onScanResult, this::onScanFailure);


            //Ensure we won't Scan forever (save battery)
            if (EnablePeriodicScan == true) {
                handler.postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        if (isScanning())
                            scanForDevices(false);
                    }
                }, 4000);
            }

        }
    }else{
        //Turn scanning off
        if(isScanning()){
            scanSubscription.unsubscribe();
        }
    }
    return true;
}

这是我的连接代码：

public void RxBleConnect() {



    autoConnectSetting = true;



    if (false == sensorConnectionState.equals(SensorConnectionState.Disconnected)) {
        Log.d(TAG, "RxBleConnect: cannot connect, #" + allowReconnect + " : " + macAddress + " isn't disconnected, currently in " + sensorConnectionState.toString() );

        if ((sensorConnectionState.equals(SensorConnectionState.Connected)) &&  (allowReconnect > 15)) { /// reached our limit even though we are connected?
            allowReconnect = 0; // reset count
            Disconnect(); // disconnect sensor.
            Log.d(TAG, "RxBleConnect: someone keeps knocking, appears that " + macAddress + " isn't as connected as we thought.");
        }
        allowReconnect ++;

        return; // dont reattempt connection if already attempting to connect
    }

    Log.d(TAG, "RxBleConnect: connecting to sensor....");

    SystemClock.sleep(400);


    connectionObservable  =
            bleDevice.establishConnection(TheApplication.getInstance(), autoConnectSetting)

            .compose(new ConnectionSharingAdapter())
            .observeOn(AndroidSchedulers.mainThread())


            .doOnUnsubscribe(this::RxBleDisconnect)
            .takeUntil(disconnectTriggerSubject)
            .doOnError(throwable -> {
                Log.d(TAG, "rxBleConnection doOnError: " + throwable);
                Disconnect(); // triggerDisconnect();
            });



    connectionSubscription = connectionObservable
            .flatMap(RxBleConnection::discoverServices)
            .subscribe(this::RxBleOnConnectionReceived, this::RxBleOnConnectionFailure);



}

如果连接状态变为断开连接，我不会尝试手动重新连接;扫描或自动连接应该照顾这个问题吗？

我已关闭＆＃34;应用优化＆＃34;在Android电池设置中应用程序的称为打盹模式，但我不知道这是否正在做任何事情。

编辑1：         这是我的日志....我们第一次连接好，然后我们尝试连接，然后我们立即断开连接：

>>> FIRST CONNECTION <<<
12-09 21:23:46.904 8992-8992/appName D/PeripheralManager: RxBleConnect: connecting to sensor...., auto connect = false
onConnectionStateChange newState=2 status=0
12-09 21:23:09.298 8992-8992/appName D/PeripheralManager: onConnectionStateChange: new state RxBleConnectionState{CONNECTED}
12-09 21:23:46.831 8992-9004/appName D/BluetoothGatt: onClientConnectionState() - status=8 clientIf=5 device=E0:CF:8D:98:69:6A
12-09 21:23:46.832 8992-9004/appName D/RxBle#BluetoothGatt: onConnectionStateChange newState=0 status=8
12-09 21:23:46.897 8992-8992/appName D/PeripheralManager: onConnectionStateChange: new state RxBleConnectionState{DISCONNECTED}
12-09 21:23:46.897 8992-8992/appName D/Peripheral Manager: setConnectionState: Set e0:cf:8d:98:69:6a connection state to Disconnected
12-09 21:23:46.898 8992-8992/appName E/PeripheralManager: ### sendDisconnectNotification: mid = 2698601

>>> ATTEMPT RECONNECT HERE <<<<
12-09 21:23:46.904 8992-8992/appName D/PeripheralManager: RxBleConnect: connecting to sensor...., auto connect = true
12-09 21:23:46.915 8992-9004/appName D/RxBle#Radio:   QUEUED RxBleRadioOperationDisconnect(250971465)
12-09 21:23:46.916 8992-9070/appName D/RxBle#Radio:  STARTED RxBleRadioOperationDisconnect(250971465)
12-09 21:23:46.922 8992-9004/appName D/BluetoothGatt: setCharacteristicNotification() - uuid: f8c00003-159f-11e6-92f5-0002a5d5c51b enable: false
12-09 21:23:46.928 8992-9004/appName D/RxBle#Radio:   QUEUED RxBleRadioOperationDescriptorWrite(49261423)
12-09 21:23:47.306 8992-8992/appName D/RxBle#Radio:   QUEUED RxBleRadioOperationConnect(200794900)
12-09 21:23:47.316 8992-8992/appName D/PeripheralManager: onConnectionStateChange: new state RxBleConnectionState{CONNECTING}
12-09 21:23:47.316 8992-8992/appName D/Peripheral Manager: setConnectionState: Set e0:cf:8d:98:69:6a connection state to Connecting…
12-09 21:23:47.340 8992-8992/appName D/BluetoothManager: getConnectionState()
12-09 21:23:47.340 8992-8992/appName D/BluetoothManager: getConnectedDevices
12-09 21:23:47.347 8992-9070/appName D/RxBle#Radio: FINISHED RxBleRadioOperationDisconnect(250971465)
12-09 21:23:47.348 8992-9070/appName D/RxBle#Radio:  STARTED RxBleRadioOperationDescriptorWrite(49261423)
12-09 21:23:47.348 8992-8992/appName D/PeripheralManager: rxBleConnection doOnError: BleGattException{status=8, bleGattOperation=BleGattOperation{description='CONNECTION_STATE'}}
12-09 21:23:47.355 8992-8992/appName D/PeripheralManager: observeConnectionStateChanges FINISHED
12-09 21:23:47.355 8992-8992/appName D/PeripheralManager: rxBleConnection doOnError: BleGattException{status=8, bleGattOperation=BleGattOperation{description='CONNECTION_STATE'}}

谢谢！

第二次编辑：

消费代码

private void RxBleOnConnectionReceived（RxBleDeviceServices services）{ //发现服务

    connectionsCount ++;

    Log.d(TAG, "RxBleOnConnectionReceived: Discovered services");


    setConnectionState(SensorConnectionState.Connected);

    try {



    connectionSubscription = connectionObservable
            .flatMap(rxBleConnection -> rxBleConnection.setupNotification(BluetoothLeUart.RX_UUID))
            .doOnError(throwable -> {
                Log.d(TAG, "RxBleOnConnectionReceived setupNotification doOnError: " + throwable);
                Disconnect(); 
            })
            .doOnNext(notificationObservable -> {
                // Notification has been set up
            })
            .flatMap(notificationObservable -> notificationObservable) // <-- Notification has been set up, now observe value changes.
            .observeOn(AndroidSchedulers.mainThread())
            .doOnError(throwable -> {
                Log.d(TAG, "RxBleOnConnectionReceived doOnError: " + throwable);
            })
            .subscribe(
                    bytes -> {
                        // Given characteristic has been changes, here is the value.
                    processReceivedMessage(bytes);

                    },
                    throwable -> {
                        /*handle throwable*/

                        Log.e(TAG, "RxBleOnConnectionReceived: processReceivedMessage： " + throwable );
                    }
            );

Answer 1

您提出了几个问题：

手机进入打盹模式时要使用哪些服务？

这是一个关于stackoverflow的好问题。例如：How does doze mode affect background/foreground services, with/without partial/full wakelocks? Cordova Plugin github页面中还存在一个关于在打瞌睡期间使用BLE的问题：https://github.com/thaliproject/Thali_CordovaPlugin/issues/413

如果设备断开连接，RxAndroidBle是否应该自动重新连接？

没有。连接结束后（使用autoconnect = true或false启动），必须再次调用RxBleDevice.establishConnection重新建立连接。从图书馆描述：

自动连接

（...）

乍一看，自动连接概念可能会产生误导。随着   autoconnect标志设置为false，连接将以错误结束   如果一个BLE设备没有广告时   调用RxBleDevice＃establishConnection方法。从平台到   平台超时后发出的错误不同，但在   一般来说，它比单秒钟还要几十秒。

将自动连接标志设置为true可让您等到BLE   设备变得可被发现。 RxBleConnection实例不会   发射直到连接完全建立。从经验来看也是如此   处理获取唤醒锁定，因此可以安全地假设你的Android   连接建立后，设备将被唤醒 -   但它不是一个记录的功能，可能会在未来的系统中发生变化   版本。

扫描或与autoconnect = true连接是否需要重新连接？

很难推断触发scanForDevices()功能的内容，但看起来它会在4秒后自动完成。如果扫描已开启且用户将呼叫scanForDevices(true)，则无论如何都会停止扫描。

rxandroidble：设备长时间断开连接：应用程序进入休眠状态

1 个答案: