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Android BLE API：未收到GATT通知
用于测试的设备：Nexus 4，Android 4.3 连接工作正常，但onCharacteristicChanged从未调用我的回调方法。但是我正在使用setCharacteristicNotification(char, true)inside注册通知onServicesDiscovered，该函数甚至返回true。 设备日志（当应该显示通知/通过蓝牙设备发送通知时，实际上根本没有消息）： 07-28 18:15:06.936 16777-16809/de.ffuf.leica.sketch D/BluetoothGatt: setCharacteristicNotification() - uuid: 3ab10101-f831-4395-b29d-570977d5bf94 enable: true 07-28 18:15:06.936 4372-7645/com.android.bluetooth D/BtGatt.GattService: registerForNotification() - address=C9:79:25:34:19:6C enable: true 07-28 18:15:06.936 4372-7645/com.android.bluetooth D/BtGatt.btif: btif_gattc_reg_for_notification 07-28 18:15:06.946 4372-7645/com.android.bluetooth D/BtGatt.btif: btgattc_handle_event: Event 1018 07-28 18:15:06.946 4372-7645/com.android.bluetooth D/BtGatt.GattService: onRegisterForNotifications() - address=null, status=0, registered=1, charUuid=3ab10101-f831-4395-b29d-570977d5bf94 07-28 18:15:06.946 4372-7645/com.android.bluetooth …