If you are using your PC/ Laptop as wifi hotspot and get error like:
The hosted network couldn’t be started.
The group or resource is not in the correct state to perform the requested opera tion

You can fix the error by take few steps.. Right Click on your computer, click on Manage..

From Device Manager, Expand Network Adapters..

Uninstall any unwanted Network Adapters. Then try to re create wifi Hotstpot again.. Command is:

netsh wlan set hostednetwork mode=allow ssid=mywifi key=12345678

and then start the created hotspot:

netsh wlan start hostednetwork

You will able to now use your Hotspot..

Download AdMob SDK and put jar file on your project libs folder.

Include this code in your mainfest file before  </application> tag:

<activity android:name="com.google.ads.AdActivity"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"/>

Include this code in your mainfest file before  <application  tag:

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

Add this on your xml layout:

<com.google.ads.AdView android:id="@+id/adView"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 ads:adUnitId="a14e176c0a170e2"
 ads:adSize="BANNER"
 ads:testDevices="TEST_EMULATOR, TEST_DEVICE_ID"
 ads:loadAdOnCreate="true"/>

“a14e176c0a170e2″ is sample AdUnit ID. Replace this with your AdUnitID in real app.

or you can check full xml file:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads"
 android:orientation="vertical"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent">
 <com.google.ads.AdView android:id="@+id/adView"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 ads:adUnitId="a14e176c0a170e2"
 ads:adSize="BANNER"
 ads:testDevices="TEST_EMULATOR, TEST_DEVICE_ID"
 ads:loadAdOnCreate="true"/>
</LinearLayout>

Import import com.google.ads.*;

Add this on your Java code:

AdView adView = (AdView)this.findViewById(R.id.adView);
 adView.loadAd(new AdRequest());

My Full Java Code:

package com.example.admob;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.LinearLayout;

import com.google.ads.*;

public class MainActivity extends Activity {

 @Override
 public void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);

// Look up the AdView as a resource and load a request.
 AdView adView = (AdView)this.findViewById(R.id.adView);
 adView.loadAd(new AdRequest());
 }

 }

You can run now and able to see the result.

http://qiao.github.com/PathFinding.js/visual/ is  nice Visual Representation of Some PathFinding Algorithms. It is really help me to understand some basic difference among those algorithm.

• Best-first search in its most general form is a simple heuristic search algorithm.
• A* Pathfinding for Beginners is really nice tutorial for Beginners like me
• You can also check about A* Algorithm on Wikipidia. 
• Jump Point Search  give best result for PathFinding.
• Here is a nice article about Jump Point Search: How to Speed Up A* Pathfinding With the Jump Point Search Algorithm
• Breadth-first search is also a poor PathFinding Algorithm.

You can also search about these algorithm: 

• D*
• Field D*
• IDA*
• Fringe Fringe Saving A* (FSA*)
• Generalized Adaptive A* (GAA*)
• Lifelong Planning A* (LPA*)
• Simplified Memory bounded A* (SMA*)
• Theta*

Visit: https://graph.facebook.com/username
then you will see your ID and other information.