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Android蓝牙设备只扫描一次

[英]Android Bluetooth device scanned only one time

原文 2016-03-11 11:35:52 5 1 android/ bluetooth/ bluetooth-lowenergy

I'm working on an Android app that needs to connect to a Bluetooth Low Energy device. 我正在开发一款需要连接蓝牙低功耗设备的Android应用。

The app is working correctly on most devices but i had troubles with some devices (One plus One with Cyanogene Android 4.4.4 and Sony C5303 with Android 4.3) using BluetoothAdapter.startLeScan() . 该应用程序在大多数设备上正常工作，但我使用BluetoothAdapter.startLeScan（）在一些设备（One plus One with Cyanogene Android 4.4.4和Sony C5303 with Android 4.3）上遇到了麻烦。

With the One plus, the problem seems to be the same as related in this post: Android 4.3: BLE: Filtering behaviour of startLeScan() the Bluetooth device is only scanned once. 使用One plus，问题似乎与本文中的相关问题相同： Android 4.3：BLE：过滤startLeScan（）的行为，蓝牙设备只扫描一次。 If I connect then disconnect from the device, it is not scan it again. 如果我连接然后从设备断开连接，则不再扫描它。

After some test I tried using: BluetoothAdapter.startDiscovery() in addition to BluetoothAdapter.startLeScan() . 经过一些测试后，我尝试使用： BluetoothAdapter.startDiscovery（）以及BluetoothAdapter.startLeScan（）。

It appears that my device is now correctly scanned multiple times and my LeScanCallback is correctly called. 现在我的设备现在已经多次正确扫描，并且我的LeScanCallback被正确调用了。 I can then connect/disconnect from my BLE device. 然后我可以连接/断开我的BLE设备。

Question is: How BluetoothAdapter.startDiscovery() can interact with BluetoothAdapter.startLeScan() to allow my device being detected multiple times ? 问题是： BluetoothAdapter.startDiscovery（）如何与BluetoothAdapter.startLeScan（）交互以允许多次检测我的设备？

Thanks for you help ! 谢谢你的帮助！

1 个解决方案

You should calling 'stopLeScan()' correctly. 你应该正确地调用'stopLeScan（）'。 After adding stopLeScan your device should be detected correctly. 添加stopLeScan后，应正确检测设备。