Android: How to monitor WiFi signal strength

Question

I would receive notifications when signal strength changes. I tried to create the following method and call it in the onCreate():

private void initializeWiFi         


        

Answer 1

Just to drop my solution:

in my App I have

@Override
protected void onResume() {
    super.onResume();
    networkStateReceiver = new NetworkStateReceiver(this);
    this.registerReceiver(networkStateReceiver, new IntentFilter("android.net.conn.CONNECTIVITY_CHANGE"));
    this.registerReceiver(networkStateReceiver, new IntentFilter("android.net.wifi.SCAN_RESULTS"));
    networkStateReceiver.registerListener(this);
}

And the onReceive in my Receiver looks like:

@Override
public void onReceive(Context context, Intent intent) {
    NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
    if (networkInfo != null && networkInfo.isConnectedOrConnecting()) {
        switch (networkInfo.getType()) {
            case ConnectivityManager.TYPE_ETHERNET:
                this.networkStateMessage = new NetworkStateMessage(networkInfo);
                break;
            case ConnectivityManager.TYPE_WIFI:
                this.networkStateMessage = new NetworkStateMessage(networkInfo, wifiManager.getConnectionInfo());
                worker.schedule(new Runnable() {
                    @Override
                    public void run() { wifiManager.startScan(); }
                }, 5, TimeUnit.SECONDS);
                break;
            default:
                this.networkStateMessage = null;
                break;
        }
    }
    notifyStateToAll(this.networkStateMessage);
}

The idea is the to startScan() only every 5 seconds if the wifi is the active network.