我目前正在尝试使用rxandroidble来替换我们应用程序之一的Android原生BLE API。
如何停用通知?我可以使用示例代码启用它,这个:
device.establishConnection(context, false)
.flatMap(rxBleConnection -> rxBleConnection.setupNotification(characteristicUuid))
.doOnNext(notificationObservable -> { // OK })
.flatMap(notificationObservable -> notificationObservable)
.subscribe(bytes -> { // OK });
但在我的产品中,我有一个用例,我必须根据需要禁用/启用通知。
另外,我试图直接取消订阅/重新连接而不是禁用/启用通知但是取消订阅命令从未明显执行,我的假设是因为我有高吞吐量(我的设备通知在300 - 400Hz),是否合理?
(我知道BLE不是最适合高吞吐量的技术,但它在这里用于R& D目的:))
感谢您的帮助!
答案 0 :(得分:1)
只要订阅来自Observable
的{{1}},就会启用通知。要禁用通知,必须取消订阅上述订阅。
有几种方法可以编码。其中之一是:
RxBleConnection.setupNotification()
请注意,在上面的示例中,只要最后一次订阅 final RxBleDevice rxBleDevice = // your RxBleDevice
final Observable<RxBleConnection> sharedConnectionObservable = rxBleDevice.establishConnection(this, false).share();
final Observable<Boolean> firstNotificationStateObservable = // an observable that will emit true when notification should be enabled and false when disabled
final UUID firstNotificationUuid = // first of the needed UUIDs to enable / disable
final Subscription subscription = firstNotificationStateObservable
.distinctUntilChanged() // to be sure that we won't get more than one enable commands
.filter(enabled -> enabled) // whenever it will emit true
.flatMap(enabled -> sharedConnectionObservable // we take the shared connection
.flatMap(rxBleConnection -> rxBleConnection.setupNotification(firstNotificationUuid)) // enable the notification
.flatMap(notificationObservable -> notificationObservable) // and take the bytes
.takeUntil(firstNotificationStateObservable.filter(enabled1 -> !enabled1)) // and we are subscribing to this Observable until we want to disable - note that only the observable from sharedConnectionObservable will be unsubscribed
)
.subscribe(
notificationBytes -> { /* handle the bytes */ },
throwable -> { /* handle exception */ }
);
结束,连接就会关闭。
要启用/停用不同的功能,您可以使用不同的sharedConnectionObservable
复制和粘贴上述代码作为启用/禁用输入和不同的Observable<Boolean>
。
答案 1 :(得分:0)
科特琳
在kotlin中,使用dispose()禁用通知。
#ENABLE NOTIFICATION
val result = device.establishConnection(false)
.flatMap(rxBleConnection -> rxBleConnection.setupNotification(characteristicUuid))
.doOnNext(notificationObservable -> {
// Notification has been set up
})
.flatMap(notificationObservable -> notificationObservable) // <-- Notification has been set up, now observe value changes.
.subscribe(
bytes -> {
// Given characteristic has been changes, here is the value.
},
throwable -> {
// Handle an error here.
}
);
#DISABLE NOTIFICATION
result.dispose()
试图退订,但没有成功,仍然不确定哪一个最好是dispose()或unsubscribe()