Unable to get ip from DHCP server

[gautam1237]

hi,
I was writing a app which when starts search fr a specific wifi-128
bit and connects to it..
I am able to connect to wifi but not getting ip from DHCP server
rather i am getting ip from zeroconf.
however when i try to connect my device to wifi by manually going to
Wifi Settings and then choosing network it gets ip from DHCP.



package com.wifi;

import java.io.PrintWriter;
import java.net.Socket;
import java.util.List;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

ACTIVITY:

public class Mywifi extends Activity implements OnClickListener {

public WifiManager manager;
BroadcastReceiver receiver;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mywifi);

//Test
System.out.println("Mywifi called");

// Setup UI
View b1=findViewById(R.id.Scan);
b1.setOnClickListener(this);
View b2=findViewById(R.id.Send);
b2.setOnClickListener(this);

//Setup Wifi
manager = (WifiManager) getSystemService(Context.WIFI_SERVICE);

//Register Receiver
IntentFilter filter =new IntentFilter();


filter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);

filter.addAction(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION);
if (receiver == null)
receiver = new WifiReceiver(this);
registerReceiver(receiver,filter);

}

public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()){

case R.id.Scan:
manager.startScan();
Toast.makeText(this, "Scan Started!!",
Toast.LENGTH_SHORT).show();

break;
case R.id.Send:

try {

Toast.makeText(this, "Sending before socket!!",
Toast.LENGTH_SHORT).show();
Socket clientSocket = new Socket("10.2.28.122", 5000);
PrintWriter outToServer = new PrintWriter(
clientSocket.getOutputStream(),true);
outToServer.println("3 pt 1 0");
Toast.makeText(this, "Sending!!",
Toast.LENGTH_SHORT).show();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();

Toast.makeText(this, "Exception !! :'(",
Toast.LENGTH_SHORT).show();
}
break;
}
}
}


RECEIVER:



package com.wifi;

import java.util.List;



import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.DhcpInfo;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiConfiguration.AuthAlgorithm;
import android.net.wifi.WifiConfiguration.GroupCipher;
import android.net.wifi.WifiConfiguration.KeyMgmt;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.widget.Toast;

public class WifiReceiver extends BroadcastReceiver{

Mywifi mywifi;
int added=0;
public WifiReceiver(Mywifi object2) {
super();
this.mywifi = object2;
System.out.println("Wifi Receiver");

}
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub

List<ScanResult> results = mywifi.manager.getScanResults();
Toast.makeText(mywifi, "On Receive Called!!",
Toast.LENGTH_SHORT).show();
System.out.println("On Receive Called!!");



if(intent.getAction().equals(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)&&
added==0) {
Toast.makeText(mywifi,"Scan Results available",
Toast.LENGTH_SHORT).show();
int test=0;
for (ScanResult result:results)
{
Toast.makeText(mywifi,"Serching for our wifi",
Toast.LENGTH_SHORT).show();
Toast.makeText(mywifi,result.SSID+" Found!!",
Toast.LENGTH_SHORT).show();
if(result.SSID.equals("CBSlinksys"))
{
Toast.makeText(mywifi,"Our wifi found!! ",
Toast.LENGTH_SHORT).show();
test=1;
System.out.println("varified");

//setting up the wifi

WifiConfiguration mywificonf =new WifiConfiguration();

mywificonf.SSID ="\""+result.SSID+"\"";
mywificonf.BSSID=result.BSSID;
mywificonf.hiddenSSID=false;



//accessing security
mywificonf.allowedAuthAlgorithms.clear();
mywificonf.allowedGroupCiphers.clear();
mywificonf.allowedKeyManagement.clear();
mywificonf.allowedPairwiseCiphers.clear();
mywificonf.allowedProtocols.clear();
mywificonf.allowedAuthAlgorithms.set(AuthAlgorithm.OPEN);

mywificonf.allowedAuthAlgorithms.set(AuthAlgorithm.SHARED);
mywificonf.allowedKeyManagement.set(KeyMgmt.NONE);
mywificonf.allowedGroupCiphers.set(GroupCipher.WEP40);
mywificonf.allowedGroupCiphers.set(GroupCipher.WEP104);

mywificonf.wepKeys[0] = "\"1234567890\"";
mywificonf.wepKeys[1] = "\"1234567890\"";
mywificonf.wepKeys[2] = "\"1234567890\"";
mywificonf.wepKeys[3] = "\"1234567890\"";
mywificonf.priority=100000;
mywificonf.wepTxKeyIndex=0;

//add this to configured network
int netId = mywifi.manager.addNetwork(mywificonf);
if(netId < 0) {
System.out.println("Unable to add network configuration for our
SSID: "+mywificonf.SSID);
Toast.makeText(mywifi,"Unable to add network configuration for
our SSID: "+mywificonf.SSID, Toast.LENGTH_LONG).show();
added=1;
return;
}

else{
System.out.println("Updated!!");
Toast.makeText(mywifi,"Updated!!", Toast.LENGTH_SHORT).show();
}
//connet to mywifi
boolean success=mywifi.manager.enableNetwork(netId, true);
if(success){
System.out.println("Successfully connected!! ");
Toast.makeText(mywifi,"Successfully Connected !! ",
Toast.LENGTH_SHORT).show();
added=1;

break;

}
else{
System.out.println("Connection Failed!! Returning...");
Toast.makeText(mywifi,"Connection Failed!! Returning...",
Toast.LENGTH_LONG).show();
return;
}

}
}
if(test==0){
System.out.println("Required Wifi not found!!");
Toast.makeText(mywifi,"Our Wifi not found!! ",
Toast.LENGTH_SHORT).show();
}
}

if(intent.getAction().equals(WifiManager.NETWORK_STATE_CHANGED_ACTION))
{
Toast.makeText(mywifi,"Network state Changed!!",
Toast.LENGTH_SHORT).show();
WifiInfo mywifiinfo= mywifi.manager.getConnectionInfo();
System.out.println("Current connection
SSID:"+mywifiinfo.getSSID());
Toast.makeText(mywifi,"Current connection SSID:
"+mywifiinfo.getSSID(), Toast.LENGTH_SHORT).show();
int ipadd=mywifiinfo.getIpAddress();
System.out.println("Connection ip address:"+ipadd);
Toast.makeText(mywifi,"Connection ip address: "+ipadd,
Toast.LENGTH_LONG).show();
String myipadd;
myipadd=((ipadd & 0xFF)+"."+(ipadd>>8 & 0xFF)+"."+(ipadd>>16 & 0xFF)
+"."+(ipadd>>24 & 0xFF));
Toast.makeText(mywifi,"Connection ip address: "+myipadd,
Toast.LENGTH_LONG).show();

}
}
}