Android BLE重新订阅特征 [英] Android BLE Resubscribing to Characteristics

问题描述

我有一个Android应用程序，它在BluetoothGatt给我GATT_SUCCESS后自动订阅了onServicesDiscovered()上的特定BLE特性.这工作得很好.

I have an Android app which auto-subscribes to specific BLE characteristics on onServicesDiscovered() after BluetoothGatt gives me a GATT_SUCCESS. This was working pretty well.

后来，我注意到使用通过BluetoothGatt.connect()的间接连接重新连接到先前的连接花费的时间太长，因此我将其更改为直接连接:device.connectGatt(this，false，mGattCallback).这对提高我的重新连接速度非常有用.

Later, I noticed that reconnecting to a previous connection using an indirect connection via BluetoothGatt.connect() was taking too long, so I changed it to be a direct connection: device.connectGatt(this, false, mGattCallback). This worked great in improving my reconnection speed.

问题:现在，每当进行重新连接时，我都会重新订购我的所有特征.这导致我每次必须进行重新连接时都会再收到一次给定的通知/指示.

The problem: Now whenever I do a reconnect I resubscribe to all my characteristics. This is resulting in me recieving a given notification/indication one additional time for each time I had to do a reconnection.

因此，如果我重新连接了两次，并要求BLE服务器向我发送温度，它将发送给我:

So if I reconnected two times and I ask my BLE server to send me the temperature it would send me:

25℃

25℃

25℃

我尝试了几步都没有运气，包括在重新连接之前将BluethoothGatt设置为null，或者在断开连接后禁用特征的通知/指示，但是我没有运气.预先感谢.

I've tried a couple things with no luck including setting my BluethoothGatt to null before reconnecting or disabling notification/indications for a characterstic after disconnecting, but I've had no luck. Thanks in advance.

推荐答案

我认为您忘了在第一个BluetoothGatt对象上调用close().

I think you forget to call close() on your first BluetoothGatt object.

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