RxBluetooth 无法与设备建立连接

Question

我想使用 RxBluetooth 在两个 Android 设备之间传输一些文本。我能够扫描并查看附近的设备，但在尝试连接到其中一个设备时遇到以下故障：

D/BluetoothUtils: isSocketAllowedBySecurityPolicy 开始：设备空

W/BluetoothAdapter: 调用 getBluetoothService() 时未调用 BluetoothManagerCallback

D/BluetoothSocket: connect(), SocketState: INIT, mPfd: {ParcelFileDescriptor: FileDescriptor[65]}

java.io.IOException: 读取失败，套接字可能关闭或超时，读取 ret: -1

这是我运行的代码，用于与选定的 BluetoothDevice:

建立连接

mRxBluetooth.observeConnectDevice(bluetoothDevice, UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"))
            .subscribeOn(mSchedulerProvider.io())
            .observeOn(mSchedulerProvider.ui())
            .subscribe(new Consumer<BluetoothSocket>() {
                @Override
                public void accept(BluetoothSocket bluetoothSocket) throws Exception {
                    // Unable to reach here.
                }
            }, new Consumer<Throwable>() {
                @Override
                public void accept(Throwable throwable) throws Exception {
                    // I reach this point with the message:
                    // java.io.IOException: read failed, socket might closed or timeout, read ret: -1
                }
            })

两台设备都启用了蓝牙，因为我能够从另一台设备上发现一个。

我使用的权限是：

<uses-feature
    android:name="android.hardware.bluetooth_le"
    android:required="true"/>

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.BLUETOOTH"/>
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>

谢谢。

Answer 1

问题已解决。我忘了 observeBluetoothSocket():

        mRxBluetooth
            .observeBluetoothSocket("MyConnection", UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"))
            .subscribeOn(mSchedulerProvider.io())
            .observeOn(mSchedulerProvider.ui())
            .subscribe(this::observeIncomingMessages,
                    throwable -> {/*Handle error*/});

Commonsguy's RxEcho（CommonsWare 的评论中建议的示例应用程序）帮助我意识到了这一事实。 RxEcho also helped me discover RxJava2 Extras by David Moten 这使得从套接字读取数据非常方便：

        Strings.from(btSocket.getInputStream())
           .subscribeOn(mSchedulerProvider.io())
           .observeOn(mSchedulerProvider.ui())
           .subscribe(data -> {/* Post data to LiveData*/},
                   throwable -> {/* Handle error*/});

感谢您花时间阅读我的问题。

RxBluetooth 无法与设备建立连接

RxBluetooth unable to establish connection with device

android

bluetooth

rx-java2

rxbluetooth