Android：在后台连接到Bluetooth LE设备
[英]Android: Connect to Bluetooth LE device in background
问题描述
I'm trying to connect to a BLE Peripheral with bleDevice.connectGatt(this, true, gattCallback) from the app's Application class. 
我正在尝试从应用程序的Application类使用bleDevice.connectGatt(this, true, gattCallback)连接到BLE外围设备。 The device will send advertising packages only every few hours. 该设备仅每隔几个小时发送一次广告包装。
This works fine as long as the app is open/active. 只要应用处于打开/活动状态，此方法就可以正常工作。 When I turn the display off and wait a few minutes and then turn on the peripheral, the gattCallback is never called. 当我关闭显示器并等待几分钟然后再打开外围设备时，永远不会调用gattCallback 。
Is there any other way to wake up the app when the bluetooth device gets alive than creating a foreground service? 除了创建前台服务之外，还有什么其他方法可以在蓝牙设备启用时唤醒应用程序？
1 个解决方案
解决方案1
0 2016-07-12 09:53:53
You can scan for that device, beginning from Lollipop the device will be woken up when there is a scan result. 您可以扫描该设备，从Lollipop开始，当扫描结果出现时，该设备将被唤醒。 Also with Lollipop you can set a filter for the scan and if your peripheral has a fixed mac address you can use that as filter, then your device wakes up, as soon as your peripheral starts advertising. 同样，通过Lollipop，您可以为扫描设置过滤器，如果外围设备具有固定的mac地址，则可以将其用作过滤器，一旦外围设备开始投放广告，设备就会唤醒。
Apart from that you could use an AlarmManager to sporadically wake up the device. 除此之外，您还可以使用AlarmManager偶尔唤醒设备。
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