我想使用RxBluetooth在两个安卓设备之间传输一些文本。我可以扫描并查看附近的设备,但在尝试连接其中一个设备时,我遇到了以下故障:
D/ device实用程序: isSocketAllowedBySecurityPolicy start :device null
W/BluetoothAdapter:在没有BluetoothManagerCallback的情况下调用getBluetoothService()
D/蓝牙connect: connect(),SocketState:初始化,mPfd:{ParcelFileDescriptor: FileDescriptor65}
java.io.IOException:读取失败,套接字可能关闭或超时,读取ret:-1
这是我为了与选定的BluetoothDevice
建立连接而运行的代码
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
}
})
蓝牙在两个设备上都是启用的,因为我能够从另一个设备中发现一个。
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。
发布于 2018-06-04 05:46:01
问题解决了。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的RxEcho (CommonsWare的评论中推荐的示例应用程序)帮助我认识到了这一点,RxEcho也帮助我发现了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*/});
感谢您抽出时间阅读我的问题。
https://stackoverflow.com/questions/50668724
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