What is wrong with my BOSH Configuration ?

Hi guys. I looked all over the net, removed, changed things, and, of course, got confused. Could you please tell me what is wrong with my code ? Thank you for your time.

package naur.naur;


import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;


import org.jivesoftware.smack.SmackException;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.bosh.BOSHConfiguration;
import org.jivesoftware.smack.bosh.XMPPBOSHConnection;


import java.io.IOException;


public class Login extends Activity {


    private static EditText Username, Password;    private Button login;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.login);        Username = (EditText) findViewById(R.id.Login_Username);        Password = (EditText) findViewById(R.id.Login_Password);        login = (Button) findViewById(R.id.LogIn_Button);    }    BOSHConfiguration.Builder boshConfiguration = BOSHConfiguration.builder()            .setUsernameAndPassword(String.valueOf(Username),String.valueOf(Password))            .setHost("www.////.mobi")            .setServiceName("////.mobi")            .setFile("/http-bind/")            .setPort(7070)            .setUseHttps(false);    XMPPBOSHConnection connection = new XMPPBOSHConnection(boshConfiguration.build());        {   login.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {            try {                connection.connect();            } catch (SmackException | XMPPException | IOException e) {                throw new IllegalStateException(e);            }            try {                connection.login();            } catch (SmackException | XMPPException | IOException e) {                throw new IllegalStateException(e);        }        }    });
}}

I get this error when I click on my LogIn_Button and then the app crashes :

04-20 12:27:05.463  22268-22268/naur.naur E/AndroidRuntime﹕ FATAL EXCEPTION: main
    java.lang.IllegalStateException: Could not execute method of the activity            at android.view.View$1.onClick(View.java:2154)            at android.view.View.performClick(View.java:2538)            at android.view.View$PerformClick.run(View.java:9152)            at android.os.Handler.handleCallback(Handler.java:587)            at android.os.Handler.dispatchMessage(Handler.java:92)            at android.os.Looper.loop(Looper.java:130)            at android.app.ActivityThread.main(ActivityThread.java:3687)            at java.lang.reflect.Method.invokeNative(Native Method)            at java.lang.reflect.Method.invoke(Method.java:507)            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842)            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)            at dalvik.system.NativeStart.main(Native Method)     Caused by: java.lang.reflect.InvocationTargetException            at java.lang.reflect.Method.invokeNative(Native Method)            at java.lang.reflect.Method.invoke(Method.java:507)            at android.view.View$1.onClick(View.java:2149)            at android.view.View.performClick(View.java:2538)            at android.view.View$PerformClick.run(View.java:9152)            at android.os.Handler.handleCallback(Handler.java:587)            at android.os.Handler.dispatchMessage(Handler.java:92)            at android.os.Looper.loop(Looper.java:130)            at android.app.ActivityThread.main(ActivityThread.java:3687)            at java.lang.reflect.Method.invokeNative(Native Method)            at java.lang.reflect.Method.invoke(Method.java:507)            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842)            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)            at dalvik.system.NativeStart.main(Native Method)     Caused by: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.            at android.view.ViewGroup.addViewInner(ViewGroup.java:1976)            at android.view.ViewGroup.addView(ViewGroup.java:1871)            at android.view.ViewGroup.addView(ViewGroup.java:1851)            at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:228)            at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:218)            at android.app.Activity.setContentView(Activity.java:1668)            at java.lang.reflect.Method.invokeNative(Native Method)            at java.lang.reflect.Method.invoke(Method.java:507)            at android.view.View$1.onClick(View.java:2149)            at android.view.View.performClick(View.java:2538)            at android.view.View$PerformClick.run(View.java:9152)            at android.os.Handler.handleCallback(Handler.java:587)            at android.os.Handler.dispatchMessage(Handler.java:92)            at android.os.Looper.loop(Looper.java:130)            at android.app.ActivityThread.main(ActivityThread.java:3687)            at java.lang.reflect.Method.invokeNative(Native Method)            at java.lang.reflect.Method.invoke(Method.java:507)            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842)            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)            at dalvik.system.NativeStart.main(Native Method)