Login with Facebook Account in ANdroid Application

First of all Generate Applcaition in facebook developer account and get applciaiton id from it and besides this geenrate hask key from your pc

For generating Hash Key put following command in terminal

keytool -exportcert -alias androiddebugkey -keystore "C:\Users\NK\.android\debug.keystore" | "D:\AndroidSetUp\openssl-0.9.8k_WIN32\bin\openssl" sha1 -binary | "D:\AndroidSetUp\openssl-0.9.8k_WIN32\bin\openssl" base64

then you have to enter keystore password
Enter keystore password : android
faAfdgdfgADSfdvGfdgfdfdgfgg=
you will finallly get your hask key this key put into developer site make code in your activity

import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.MalformedURLException;

import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import com.facebook.android.AsyncFacebookRunner;
import com.facebook.android.AsyncFacebookRunner.RequestListener;
import com.facebook.android.DialogError;
import com.facebook.android.Facebook;
import com.facebook.android.Facebook.DialogListener;
import com.facebook.android.FacebookError;

public class AndroidFacebookConnectActivity extends Activity {

// Your Facebook APP ID
private static String APP_ID = "639585436072863"; // Replace with your App ID

// Instance of Facebook Class
private Facebook facebook = new Facebook(APP_ID);
private AsyncFacebookRunner mAsyncRunner;
String FILENAME = "AndroidSSO_data";
private SharedPreferences mPrefs;

// Buttons
Button btnFbLogin;
Button btnFbGetProfile;
Button btnPostToWall;
Button btnShowAccessTokens;

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

btnFbLogin = (Button) findViewById(R.id.btn_fblogin);
btnFbGetProfile = (Button) findViewById(R.id.btn_get_profile);
btnPostToWall = (Button) findViewById(R.id.btn_fb_post_to_wall);
btnShowAccessTokens = (Button) findViewById(R.id.btn_show_access_tokens);
mAsyncRunner = new AsyncFacebookRunner(facebook);

/**
* Login button Click event
* */
btnFbLogin.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
Log.d("Image Button", "button Clicked");
loginToFacebook();
}
});

/**
* Getting facebook Profile info
* */
btnFbGetProfile.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
getProfileInformation();
}
});

/**
* Posting to Facebook Wall
* */
btnPostToWall.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
postToWall();
}
});

/**
* Showing Access Tokens
* */
btnShowAccessTokens.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
showAccessTokens();
}
});

}

/**
* Function to login into facebook
* */
public void loginToFacebook() {

mPrefs = getPreferences(MODE_PRIVATE);
String access_token = mPrefs.getString("access_token", null);
long expires = mPrefs.getLong("access_expires", 0);

if (access_token != null) {
facebook.setAccessToken(access_token);

btnFbLogin.setVisibility(View.INVISIBLE);

// Making get profile button visible
btnFbGetProfile.setVisibility(View.VISIBLE);

// Making post to wall visible
btnPostToWall.setVisibility(View.VISIBLE);

// Making show access tokens button visible
btnShowAccessTokens.setVisibility(View.VISIBLE);

Log.d("FB Sessions", "" + facebook.isSessionValid());
}

if (expires != 0) {
facebook.setAccessExpires(expires);
}

if (!facebook.isSessionValid()) {
facebook.authorize(this,
new String[] { "email", "publish_stream" },
new DialogListener() {

@Override
public void onCancel() {
// Function to handle cancel event
}

@Override
public void onComplete(Bundle values) {
// Function to handle complete event
// Edit Preferences and update facebook acess_token
SharedPreferences.Editor editor = mPrefs.edit();
editor.putString("access_token",
facebook.getAccessToken());
editor.putLong("access_expires",
facebook.getAccessExpires());
editor.commit();

// Making Login button invisible
btnFbLogin.setVisibility(View.INVISIBLE);

// Making logout Button visible
btnFbGetProfile.setVisibility(View.VISIBLE);

// Making post to wall visible
btnPostToWall.setVisibility(View.VISIBLE);

// Making show access tokens button visible
btnShowAccessTokens.setVisibility(View.VISIBLE);
}

@Override
public void onError(DialogError error) {
// Function to handle error

}

@Override
public void onFacebookError(FacebookError fberror) {
// Function to handle Facebook errors

}

});
}
}

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
facebook.authorizeCallback(requestCode, resultCode, data);
}


/**
* Get Profile information by making request to Facebook Graph API
* */
public void getProfileInformation() {
mAsyncRunner.request("me", new RequestListener() {
@Override
public void onComplete(String response, Object state) {
Log.d("Profile", response);
String json = response;
try {
// Facebook Profile JSON data
JSONObject profile = new JSONObject(json);

// getting name of the user
final String name = profile.getString("name");

// getting email of the user
final String email = profile.getString("email");

runOnUiThread(new Runnable() {

@Override
public void run() {
Toast.makeText(getApplicationContext(), "Name: " + name + "\nEmail: " + email, Toast.LENGTH_LONG).show();
}

});


} catch (JSONException e) {
e.printStackTrace();
}
}

@Override
public void onIOException(IOException e, Object state) {
}

@Override
public void onFileNotFoundException(FileNotFoundException e,
Object state) {
}

@Override
public void onMalformedURLException(MalformedURLException e,
Object state) {
}

@Override
public void onFacebookError(FacebookError e, Object state) {
}
});
}

/**
* Function to post to facebook wall
* */
public void postToWall() {
// post on user's wall.
facebook.dialog(this, "feed", new DialogListener() {

@Override
public void onFacebookError(FacebookError e) {
}

@Override
public void onError(DialogError e) {
}

@Override
public void onComplete(Bundle values) {
}

@Override
public void onCancel() {
}
});

}

/**
* Function to show Access Tokens
* */
public void showAccessTokens() {
String access_token = facebook.getAccessToken();

Toast.makeText(getApplicationContext(),
"Access Token: " + access_token, Toast.LENGTH_LONG).show();
}

/**
* Function to Logout user from Facebook
* */
public void logoutFromFacebook() {
mAsyncRunner.logout(this, new RequestListener() {
@Override
public void onComplete(String response, Object state) {
Log.d("Logout from Facebook", response);
if (Boolean.parseBoolean(response) == true) {
runOnUiThread(new Runnable() {

@Override
public void run() {
// make Login button visible
btnFbLogin.setVisibility(View.VISIBLE);

// making all remaining buttons invisible
btnFbGetProfile.setVisibility(View.INVISIBLE);
btnPostToWall.setVisibility(View.INVISIBLE);
btnShowAccessTokens.setVisibility(View.INVISIBLE);
}

});

}
}

@Override
public void onIOException(IOException e, Object state) {
}

@Override
public void onFileNotFoundException(FileNotFoundException e,
Object state) {
}

@Override
public void onMalformedURLException(MalformedURLException e,
Object state) {
}

@Override
public void onFacebookError(FacebookError e, Object state) {
}
});
}