如何查找已连接蓝牙设备的信号强度
在我的一个应用程序中，我需要显示与我的手机配对的所有 Wi-Fi 和蓝牙设备及其信号强度。有了 Wi-Fi，我就可以显示信号强度（RSSI）。但我的蓝牙有问题。我寻找了一些适合这项任务的方法；我找到了一种方法：
intent.getShortExtra(BluetoothDevice.EXTRA_RSSI, Short.MIN_VALUE);
但它只显示未与我的手机配对的新设备 RSSI。有没有办法获取所有蓝牙设备的 RSSI？
In one of my applications, I need to display all the wi-fi and Bluetooth devices which are paired to my mobile, and their signal strengths. With wi-fi, it's okay for me to display signal strength (RSSI). But I have a problem with the Bluetooth. I searched for some method which is suitable for this task; I found one method:
intent.getShortExtra(BluetoothDevice.EXTRA_RSSI, Short.MIN_VALUE);
But it is displaying only the new device RSSI which is not paired to my mobile. Is there any idea for getting all Bluetooth devices RSSI?
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对于蓝牙 RSSI，您可以读取已连接设备的 RSSI，或执行蓝牙发现以检查附近设备的 RSSI。
基本上，蓝牙发现是向范围内的所有电台广播以做出响应。当每个设备响应时，Android 会触发 ACTION_FOUND 意图。在此意图中，您可以 getExtra EXTRA_RSSI 来获取 RSSI。
请注意，并非所有蓝牙硬件都支持 RSSI。
另相关：Android IRC Office Hours 关于 Android 蓝牙 RSSI 的问题
For bluetooth RSSI, you can read RSSI for connected devices, or perform a bluetooth discovery to check the RSSI for nearby devices.
Basically a bluetooth discovery is a broadcast to all stations within range to respond back. As each devices respons back, Android fires off an ACTION_FOUND intent. Within this intent you can getExtra EXTRA_RSSI to obtain the RSSI.
Note that not all bluetooth hardware supports RSSI.
Also Related: Android IRC Office Hours Question About Android Bluetooth RSSI