android.net.wifi.STATE_CHANGE: not triggered on Wifi disconnect

Question

Is it normal to only have a broadcast intent with action NETWORK_STATE_CHANGED_ACTION (whose constant value is android.net.wifi.STATE_CHANGE) when

Answer 1

I had a similar need in my project and ended up having to use both.

The android.net.wifi.supplicant.CONNECTION_CHANGE action sends a broadcast when the network is connected, but usually before the device has an IP address, so I needed the android.net.wifi.STATE_CHANGE action for that.

The android.net.wifi.STATE_CHANGE action receives a broadcast on disconnect only if the device is disconnecting from a network, but wifi is still enabled (when hotspot goes out of range, for example)

So you should put both actions for the receiver in the manifest:

and you put an if to check which action is being called in the intent. Here is the onReceive method of the BroadcastReceiver in my code:

public void onReceive(Context c, Intent intent) {
      if(intent.getAction().equals(WifiManager.SUPPLICANT_CONNECTION_CHANGE_ACTION)){ 
          boolean connected = intent.getBooleanExtra(WifiManager.EXTRA_SUPPLICANT_CONNECTED, false);
          if(!connected) {
               //Start service for disconnected state here
          }
      }

      else if(intent.getAction().equals(WifiManager.NETWORK_STATE_CHANGED_ACTION)){
          NetworkInfo netInfo = intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);
          if( netInfo.isConnected() )
          {
              //Start service for connected state here.
          }   
      }
  }