Android-based Wi-Fi signal strength acquisition

1. Android gets Wi-Fi signal quality:

Int strength = wifimanager. calculatesignallevel (info. getarg (), 5); that is, the signal strength.

Method:

Private string obtainwifiinfo () {// connection speed and signal strength of wifi: wifimanager = (wifimanager) getsystemservice (wifi_service); // wifiinfo = wifimanager. getconnectioninfo (); wifiinfo info = wifimanager. getconnectioninfo (); If (info. getbssid ()! = NULL) {// link signal strength int strength = wifimanager. calculatesignallevel (info. getarg (), 5); // link speed int speed = info. getlinkspeed (); // The link speed unit: String Units = wifiinfo. link_speed_units; // WiFi source name string SSID = info. getssid ();} return info. tostring ();}

2. Register a receiver to listen for Wi-Fi signal changes:

public BroadcastReceiver rssiReceiver = new BroadcastReceiver() {        @Override        public void onReceive(Context context, Intent intent) {        }    };    @Override    public void onResume() {        super.onResume();        registerReceiver(rssiReceiver, new IntentFilter(WifiManager.RSSI_CHANGED_ACTION));                Log.d("way", "Registered");    }    @Override    public void onPause() {        super.onPause();                unregisterReceiver(rssiReceiver);        Log.d("way", "Unregistered");    }