Question

尽我所能了解RxJava中的所有魔力和出色的rxandrodible库后，我陷入了困境！我需要修复的最后一件事是设置一个写/通知链接，在其中写一个值（单个值），然后订阅一个特定的特性。

我使用了以下代码-作为最佳实践（？）-但实际上并没有在soundTV上产生任何数据。

connectionSubscription = device.establishConnection(false)
                    .flatMap( // when the connection is available...
                            rxBleConnection -> rxBleConnection.setupNotification(RX_CHAR_UUID), // ... setup the notification...
                            (rxBleConnection, apScanDataNotificationObservable) -> Observable.combineLatest( // ... when the notification is setup...
                                    rxBleConnection.writeCharacteristic(TX_CHAR_UUID, new byte[]{SOUND}).toObservable(), // ... write the characteristic...
                                    apScanDataNotificationObservable.take(1),// ... and observe for the first notification on the AP_SCAN_DATA
                                    (writtenBytes, responseBytes) -> responseBytes // ... when both will appear return just the response bytes...
                            )
                    )
                    .flatMap(observable -> observable) // ... flatMap the result as it is Observable<byte[]>...// ... and finish after first response is received to cleanup notifications
                    .take(1)
                    .observeOn(AndroidSchedulers.mainThread())
                    .subscribe(
                            responseBytes -> {
                                soundTV.setText(new String(responseBytes));
                            },
                            throwable -> {
                                soundTV.setText(throwable.toString());}
                    );

没有给订阅TextView的预订所写的数据，我找不到任何出错的地方。

如果我只是设置通知，而不将其与写入结合使用，那么一切都会正常进行。

关于如何使其工作的任何建议？

所使用的代码示例仅给出一个响应。我一直在寻找正在进行的写入和订阅。我没有意识到take（1）调用实际上起到了作用，认为这是对复杂调用结构的清理。

对不起！这项功能符合我的预期：

    connectionSubscription = device.establishConnection(false)
                    .flatMap( // when the connection is available...
                            rxBleConnection -> rxBleConnection.setupNotification(RX_CHAR_UUID), // ... setup the notification...
                            (rxBleConnection, apScanDataNotificationObservable) -> Observable.combineLatest( // ... when the notification is setup...
                                    rxBleConnection.writeCharacteristic(TX_CHAR_UUID, new byte[]{SOUND}).toObservable(), // ... write the characteristic...
                                    apScanDataNotificationObservable,// ... and observe for the first notification on the AP_SCAN_DATA
                                    (writtenBytes, responseBytes) -> responseBytes // ... when both will appear return just the response bytes...
                            )
                    )
                    .flatMap(observable -> observable) // ... flatMap the result as it is Observable<byte[]>...// ... and finish after first response is received to cleanup notifications
                    .observeOn(AndroidSchedulers.mainThread())
                    .subscribe(
                            responseBytes -> {
                                soundTV.setText(new String(responseBytes));
                            },
                            throwable -> {
                                soundTV.setText(throwable.toString());}
                    );

在写/通知设置中没有通知数据

0 个答案: