WIFI list & Connection by android mode (at Processing Tool)

WIFI list & Connection by android mode (at Processing Tool)

------------------------------ code------------------- import android.net.wifi.*; import android.content.*; import java.util.*;

Context context;

void connect_to_wifi(){

  //create wifi connection
        String networkSSID = "";
        String networkPass = "";

        WifiConfiguration conf = new WifiConfiguration();
        conf.SSID = "\"" + networkSSID + "\"";   // Please note the quotes. String should contain ssid in quotes

         //For WPA network you need to add passphrase like this:

            conf.preSharedKey = "\""+ networkPass +"\"";

        //Then, you need to add it to Android wifi manager settings:
        WifiManager wifiManager = (WifiManager)context.getSystemService(Context.WIFI_SERVICE);
        wifiManager.addNetwork(conf);

        //And finally, you might need to enable it, so Android conntects to it:
        List<WifiConfiguration> list = wifiManager.getConfiguredNetworks();
        for( WifiConfiguration i : list ) {
            if(i.SSID != null && i.SSID.equals("\"" + networkSSID + "\"")) {
                 wifiManager.disconnect();
                 wifiManager.enableNetwork(i.networkId, true);
                 wifiManager.reconnect();

                 break;
            }
         }
}

void setup() {
  size(480,800);
  noStroke();
  fill(255);
  rectMode(CENTER);     // This sets all rectangles to draw from the center point
  connect_to_wifi();
}

void draw() {
  background(0);
  rect(width/2, height/2, 150, 150);
}

Error Message : FATAL EXCEPTION: Animation Thread Please solve the problem. Help.