显示连接的蓝牙设备 Kotlin

Question

我只能找到如何显示配对的蓝牙设备，而不是当前连接的蓝牙设备。这是显示配对的代码：

val blueToothManager=applicationContext.getSystemService(BLUETOOTH_SERVICE) as BluetoothManager
    val bluetoothAdapter=blueToothManager.adapter
    var pairedDevices = bluetoothAdapter.bondedDevices
    var data:StringBuffer = StringBuffer()
    for(device: BluetoothDevice in pairedDevices)
    {
        data.append(device.name + " ")
    }
    if(data.isEmpty())
    {
        bluetoothText.text = "0 Devices Connected"
        val leftDrawable: Drawable? = getDrawable(R.drawable.ic_bluetooth_disabled)
        val drawables: Array<Drawable> = bluetoothText.getCompoundDrawables()
        bluetoothText.setCompoundDrawablesWithIntrinsicBounds(
            leftDrawable, drawables[1],
            drawables[2], drawables[3]
        )
    }
    else
    {
        bluetoothText.text = data
        val leftDrawable: Drawable? = getDrawable(R.drawable.ic_bluetooth_connected)
        val drawables: Array<Drawable> = bluetoothText.getCompoundDrawables()
        bluetoothText.setCompoundDrawablesWithIntrinsicBounds(
            leftDrawable, drawables[1],
            drawables[2], drawables[3]
        )
    }

有人知道如何显示当前连接的蓝牙设备而不是配对的设备吗？谢谢

Answer 1

我认为没有直接的方法来检查配对的蓝牙设备是否已连接，因为它可以随时更改。我建议的最佳解决方案是列出所有配对设备并使用return 蓝牙状态改变列表中指定设备的广播接收器，如下所述 link Android bluetooth get connected devices

Answer 2

@Mohamed Saleh，谢谢你成功了。我添加了这个：

private fun isConnected(device: BluetoothDevice): Boolean {
return try {
    val m: Method = device.javaClass.getMethod("isConnected")
    m.invoke(device) as Boolean
} catch (e: Exception) {
    throw IllegalStateException(e)
}

}

并更改了这个：

for(device in pairedDevices)
    {
        if(isConnected((device)))
        data.append(" " + device.name + " ")
    }

现在显示的是已连接的蓝牙设备，而不是已配对的设备！还要感谢来自其他 post 的@Abdallah AbuSalah：Android bluetooth get connected devices

显示连接的蓝牙设备 Kotlin

Show connected bluetooth devices Kotlin

android

bluetooth

kotlin

android-studio