How to detect WiFi tethering state

Question

I want to know how to detect state of WiFi tethering. I\'ve seen an article: Android 2.3 wifi hotspot API But it doesn\'t work! It returns always WIFI_AP_STATE_DISABLED = 1.

Answer 1

Reflection is a poor way to achieve this.

We can inspect the DhcpInfo to determine if the device is allocating addresses (mobile hotspot) or is being allocated by another DHCP server.

Here is a kotlin function that will determine if a device is a mobile hotspot, it has not been widely tested so YMMV.

fun isMobileHotspot(manager: WifiManager): Boolean {
  val info = manager.dhcpInfo
  return (
      info.ipAddress == 0
          && info.netmask == 0
          && info.gateway == 0
          && info.serverAddress == 16885952) // 192.168.1.1
}